[Federal Register Volume 81, Number 15 (Monday, January 25, 2016)]
[Rules and Regulations]
[Pages 4086-4158]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2016-00039]
[[Page 4085]]
Vol. 81
Monday,
No. 15
January 25, 2016
Part II
Department of Energy
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10 CFR Parts 429 and 431
Energy Conservation Program: Test Procedure for Pumps; Final Rule
Federal Register / Vol. 81 , No. 15 / Monday, January 25, 2016 /
Rules and Regulations
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DEPARTMENT OF ENERGY
10 CFR Parts 429 and 431
[Docket No. EERE-2013-BT-TP-0055]
RIN 1905-AD50
Energy Conservation Program: Test Procedure for Pumps
AGENCY: Office of Energy Efficiency and Renewable Energy, Department of
Energy.
ACTION: Final rule.
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SUMMARY: On April 1, 2015, the U.S. Department of Energy (DOE) issued a
notice of proposed rulemaking (NOPR) to establish new definitions and a
new test procedure for pumps. That proposed rulemaking serves as the
basis for this final rule. This final rule establishes a new test
procedure for pumps, as well as associated definitions and parameters
that establish the scope of applicability of the test procedure.
Specifically, the pumps test procedure adopted in this final rule
incorporates by reference the test procedure from the Hydraulic
Institute (HI)--standard 40.6-2014, ``Methods for Rotodynamic Pump
Efficiency Testing''--with several clarifications and modifications,
related to measuring the hydraulic power, shaft power, and electric
input power of pumps, inclusive of electric motors and any continuous
or non-continuous controls. The new pumps test procedure will be used
to determine the constant load pump energy index (PEICL) for
pumps sold without continuous or non-continuous controls and the
variable load pump energy index (PEIVL) for pumps sold with
continuous or non-continuous controls. The final rule incorporates
certain recommendations made by the commercial and industrial pumps
(CIP) Working Group, which was established under the Appliance
Standards Rulemaking Federal Advisory Committee (ASRAC), as well as
comments submitted by interested parties in response to the April 2015
pumps test procedure NOPR.
DATES: The effective date of this rule is February 24, 2016. Compliance
with the final rule will be mandatory for representations of
PEICL, PEIVL, the constant load pump energy
rating (PERCL), and the variable load pump energy rating
(PERVL) made on or after July 25, 2016. The incorporation by
reference of certain publications listed in this rule is approved by
the Director of the Federal Register as of February 24, 2016.
ADDRESSES: The docket, which includes Federal Register notices, public
meeting attendee lists and transcripts, comments, and other supporting
documents/materials, is available for review at regulations.gov. All
documents in the docket are listed in the www.regulations.gov index.
However, some documents listed in the index, such as those containing
information that is exempt from public disclosure, may not be publicly
available.
A link to the docket Web page can be found at: https://www1.eere.energy.gov/buildings/appliance_standards/product.aspx/productid/44. This Web page contains a link to the docket for this
document on the regulations.gov site. The www.regulations.gov Web page
contains simple instructions on how to access all documents, including
public comments, in the docket.
For further information on how to review the docket, contact Ms.
Brenda Edwards at (202) 586-2945 or by email:
[email protected].
FOR FURTHER INFORMATION CONTACT:
Ms. Ashley Armstrong, U.S. Department of Energy, Office of Energy
Efficiency and Renewable Energy, Building Technologies Office, EE-5B,
1000 Independence Avenue SW., Washington, DC 20585-0121. Telephone:
(202) 586-6590. Email: [email protected].
Jennifer Tiedeman, U.S. Department of Energy, Office of the General
Counsel, GC-33, 1000 Independence Avenue SW., Washington DC 20585-0121.
Telephone: (202) 287-6111. Email: [email protected].
SUPPLEMENTARY INFORMATION: This final rule incorporates by reference
into 10 CFR part 431 the following industry standards:
(1) FM Class Number 1319, ``Approval Standard for Centrifugal Fire
Pumps (Horizontal, End Suction Type),'' approved January 2015.
Copies of FM Class Number 1319 can be obtained from: FM Global,
1151 Boston-Providence Turnpike, P.O. Box 9102, Norwood, MA 02062,
(781) 762-4300, or by visiting www.fmglobal.com.
(2) American National Standards Institute (ANSI)/HI 1.1-1.2-2014
(``ANSI/HI 1.1-1.2-2014''), ``American National Standard for
Rotodynamic Centrifugal Pumps for Nomenclature and Definitions;''
approved October 30, 2014, sections 1.1, ``Types and nomenclature,''
and 1.2.9, ``Rotodynamic pump icons.''
(3) ANSI/HI 2.1-2.2-2014 (``ANSI/HI 2.1-2.2-2014 ''), ``American
National Standard for Rotodynamic Vertical Pumps of Radial, Mixed, and
Axial Flow Types for Nomenclature and Definitions,'' approved April 8,
2014, section 2.1, ``Types and nomenclature.''
(4) HI 40.6-2014, (``HI 40.6-2014'') ``Methods for Rotodynamic Pump
Efficiency Testing,'' (except for section 40.6.5.3, ``Test report;''
Appendix A, section A.7, ``Testing at temperatures exceeding 30 [deg]C
(86[emsp14][deg]F);'' and Appendix B, ``Reporting of test results
(normative);'') copyright 2014.
Copies of ANSI/HI 1.1-1.2-2014, ANSI/HI 2.1-2.2-2014, and HI 40.6-
2014 can be obtained from: the Hydraulic Institute at 6 Campus Drive,
First Floor North, Parsippany, NJ 07054-4406, (973) 267-9700, or by
visiting www.pumps.org.
(5) National Fire Protection Association (NFPA) 20-2016, ``Standard
for the Installation of Stationary Pumps for Fire Protection,'' 2016
Edition, approved June 15, 2015.
Copies of NFPA 20-2016 can be obtained from: the National Fire
Protection Association, 1 Batterymarch Park, Quincy, MA 02169, (617)
770-3000, or by visiting www.nfpa.org.
(6) UL 488, (``ANSI/UL 448-2013''), ``Standard for Safety
Centrifugal Stationary Pumps for Fire-Protection Service,'' 10th
Edition, June 8, 2007, including revisions through July 12, 2013.
Copies of ANSI/UL448-2013 can be obtained from: UL, 333 Pfingsten
Road, Northbrook, IL 60062, (847) 272-8800, or by visiting http://ul.com.
This material is also available for inspection at U.S. Department
of Energy, Office of Energy Efficiency and Renewable Energy, Building
Technologies Program, Sixth Floor, 950 L'Enfant Plaza SW., Washington,
DC 20024, (202) 586-2945, or at http://energy.gov/eere/buildings/appliance-and-equipment-standards-program.
See section IV.N. for additional information about these standards.
Table of Contents
I. Authority and Background
A. Authority
B. Background
II. Summary of the Final Rule
III. Discussion
A. Scope
1. Definitions Related to the Scope of Covered Pumps
2. Equipment Categories
3. Scope Exclusions Based on Application
4. Parameters for Establishing the Scope of Pumps in This
Rulemaking
5. Drivers Other Than Electric Motors
6. Pumps Sold With Single-Phase Induction Motors
B. Rating Metric: Constant and Variable Load Pump Energy Index
1. Determination of the Pump Energy Rating
2. PERSTD: Minimally Compliant Pump
C. Determination of Pump Performance
1. Incorporation by Reference of HI 40.6-2014
[[Page 4087]]
2. Minor Modifications and Additions to HI 40.6-2014
D. Determination of Motor Efficiency
1. Default Nominal Full Load Motor Efficiency
2. Represented Nominal Full Load Motor Efficiency for Pumps Sold
With Motors
3. Determining Part Load Motor Losses
E. Test Methods for Different Pump Configurations
1. Calculation-Based Test Methods
2. Testing-Based Methods
F. Representations of Energy Use and Energy Efficiency
G. Sampling Plans for Pumps
IV. Procedural Issues and Regulatory Review
A. Review Under Executive Order 12866
B. Review Under the Regulatory Flexibility Act
1. The Need for, and Objectives of, Today's Rule
2. Significant Issues From Interested Parties in Response to
IRFA
3. Revised Assessment of Burden Associated With This Test
Procedure Final Rule
4. Calculator Comments
C. Review Under the Paperwork Reduction Act of 1995
D. Review Under the National Environmental Policy Act of 1969
E. Review Under Executive Order 13132
F. Review Under Executive Order 12988
G. Review Under the Unfunded Mandates Reform Act of 1995
H. Review Under the Treasury and General Government
Appropriations Act, 1999
I. Review Under Executive Order 12630
J. Review Under Treasury and General Government Appropriations
Act, 2001
K. Review Under Executive Order 13211
L. Review Under Section 32 of the Federal Energy Administration
Act of 1974
M. Congressional Notification
N. Description of Materials Incorporated by Reference
V. Approval of the Office of the Secretary
I. Authority and Background
Pumps are included in the list of ``covered equipment'' for which
the U.S. Department of Energy (DOE) is authorized to establish and
amend energy conservation standards and test procedures. (42 U.S.C.
6311(1)(A)) However, there are not currently any Federal energy
conservation standards or test procedures for pumps. The following
sections discuss DOE's authority to establish test procedures for pumps
and relevant background information regarding DOE's consideration of
test procedures for this equipment.
A. Authority
The Energy Policy and Conservation Act of 1975 (EPCA), Public Law
94-163, as amended by Public Law 95-619, Title IV, Sec. 441(a),
established the Energy Conservation Program for Certain Industrial
Equipment under Title III, Part C (42 U.S.C. 6311-6317, as codified)
\1\ \2\ Included among the various types of industrial equipment
addressed by EPCA are pumps, the subject of this document. (42 U.S.C.
6311(1)(A))
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\1\ For editorial reasons, Part C was codified as Part A-1 in
the U.S. Code.
\2\ All references to EPCA in this document refer to the statute
as amended through the Energy Efficiency Improvement Act of 2015,
Public Law 114-11 (April 30, 2015).
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Under EPCA, the energy conservation program consists essentially of
four parts: (1) Testing, (2) labeling, (3) Federal energy conservation
standards, and (4) certification and enforcement procedures. The
testing requirements consist of test procedures that manufacturers of
covered products must use as the basis for (1) certifying to DOE that
their products comply with the applicable energy conservation standards
adopted under EPCA, (42 U.S.C. 6295(s) and 6316(a)(1)), and (2) making
representations about the efficiency of that equipment. (42 U.S.C.
6314(d)) Similarly, DOE must use these test procedures to determine
whether the products comply with any relevant standards promulgated
under EPCA.
DOE is authorized to prescribe energy conservation standards and
corresponding test procedures for statutorily covered equipment such as
pumps. While DOE is currently evaluating whether to establish energy
conservation standards for pumps (Docket No. EERE-2011-BT-STD-0031),
DOE must first establish a test procedure that measures the energy use,
energy efficiency, or estimated operating costs of such equipment. See,
generally, 42 U.S.C. 6295(r) and 6316(a).
Under 42 U.S.C. 6314, EPCA sets forth the criteria and procedures
DOE must follow when prescribing or amending test procedures for
covered equipment. EPCA provides that any test procedures prescribed or
amended under this section shall be reasonably designed to produce test
results that measure energy efficiency, energy use or estimated annual
operating cost of a covered product during a representative average use
cycle or period of use, and shall not be unduly burdensome to conduct.
(42 U.S.C. 6314(a)(2))
In addition, before prescribing any final test procedures, DOE must
publish proposed test procedures and offer the public an opportunity to
present oral and written comments on them. (42 U.S.C. 6314(b)(1)-(2))
In this final rule, DOE is establishing a test procedure for pumps
concurrent with its ongoing energy conservation standards rulemaking
for this equipment (See Docket No. EERE-2011-BT-STD-0031). As discussed
further in section I.B, DOE published a notice of proposed rulemaking
(NOPR) on April 1, 2015 presenting and requesting public comment on
DOE's proposals related to pumps definitions, metric, and test
procedure requirements (April 2015 pump test procedure NOPR). 80 FR
17586.
The pumps test procedure adopted in this final rule includes
methods required to (1) measure the performance of the covered
equipment and (2) use the measured results to calculate a pump energy
index (PEICL for pumps sold without continuous or non-
continuous controls or PEIVL for pumps sold with continuous
or non-continuous controls) to represent the power consumption of the
pump, inclusive of a motor and any continuous or non-continuous
controls, normalized with respect to the performance of a minimally
compliant pump. In this final rule, DOE is also establishing the
specific styles and characteristics of pumps to which the test
procedure applies.
Manufacturers will be required to make all representations of pump
efficiency, overall (wire-to-water) efficiency, bowl efficiency, driver
power input, pump power input (brake or shaft horsepower), and/or pump
power output (hydraulic horsepower) using methods that will generate
values consistent with the DOE test procedure beginning 180 days after
the publication date of this final rule in the Federal Register.
Manufacturers also will be required to use the new test procedure and
metric when making representations regarding the PEICL,
PEIVL, PERCL, or PERVL of covered
equipment 180 days after the publication date of any applicable energy
conservation standards final rule in the Federal Register. However, DOE
notes that certification of compliance with any energy conservation
standards for pumps would not be required until the compliance date of
any final rule establishing such energy conservation standards. See 42
U.S.C. 6314(d) and Docket No. EERE-2011-BT-STD-0031.
B. Background
DOE does not currently regulate pumps. In 2011, DOE issued a
Request for Information (RFI) to gather data and information related to
pumps in anticipation of initiating rulemakings to formally consider
test procedures and energy conservation standards for this equipment.
76 FR 34192 (June 13, 2011). In February 2013, DOE published a Notice
of Public Meeting and Availability of the Framework document to
initiate an energy conservation standard rulemaking for pumps (78 FR
7304 Feb. 1, 2013) and
[[Page 4088]]
held a public meeting to discuss the Framework document (the ``pumps
Framework public meeting'').
Following the pumps Framework public meeting, DOE convened a
Commercial and Industrial Pumps Working Group (``CIP Working Group''
or, in context, ``Working Group'') through the Appliance Standards
Rulemaking Federal Advisory Committee (ASRAC) to negotiate standards
and test procedures for pumps as an alternative to the traditional
notice and comment rulemaking process that DOE had already begun.
(Docket No. EERE-2013-BT-NOC-0039) \3\ The CIP Working Group commenced
negotiations at an open meeting on December 18 and 19, 2013, and held
six additional meetings and two webinars to discuss definitions,
metrics, test procedures, and standard levels for pumps.\4\ The CIP
Working Group concluded its negotiations on June 19, 2014, with a
consensus vote to approve a term sheet containing recommendations to
DOE on appropriate standard levels for pumps as well as recommendations
addressing issues related to the metric and test procedure for pumps
(``Working Group recommendations'').\5\ Subsequently, ASRAC voted
unanimously to approve the Working Group recommendations during a July
7, 2014 webinar.
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\3\ Information on the ASRAC, the CIP Working Group, and meeting
dates is available at http://energy.gov/eere/buildings/appliance-standards-and-rulemaking-federal-advisory-committee.
\4\ Details of the negotiation sessions can be found in the
public meeting transcripts that are posted to the docket for the
Working Group (http://www.regulations.gov/#!docketDetail;D=EERE-
2013-BT-NOC-0039).
\5\ The term sheet containing the Working Group recommendations
is available in the CIP Working Group's docket. (Docket No. EERE-
2013-BT-NOC-0039, No. 92) The ground rules of the CIP Working Group
define consensus as no more than two negative votes. (Docket No.
EERE-2013-BT-NOC-0039, No. 18 at p. 2) Concurrence was assumed if a
voting member was absent, and overt dissent was only evidenced by a
negative vote. Abstention was not construed as a negative vote.
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Following approval of the Working Group recommendations, DOE
published a NOPR implementing the recommendations of the CIP Working
Group \6\ and proposing a new test procedure for pumps, as well as
associated definitions and parameters to establish the applicability of
the test procedure (April 2015 pump test procedure NOPR). 80 FR 17586
(April 1, 2015). On April 29, 2015, DOE held a public meeting to
discuss and request public comment on the April 2015 pumps test
procedure NOPR (April 2015 NOPR public meeting).
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\6\ DOE's proposals in the April 2015 pumps test procedure NOPR
reflect the intent of the CIP Working Group recommendations.
However, DOE proposed some slight modifications and significant
additional detail to ensure the technical integrity, accuracy,
repeatability, and enforceability of the pumps test procedure and
scope.
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DOE's test procedure for pumps, adopted in this final rule,
reflects certain recommendations of the CIP Working Group, as well as
input from interested parties received in response to the April 2015
pumps test procedure NOPR. Provisions of this final rule that are
directly pertinent to any of the 14 approved Working Group
recommendations will be specified with a citation to the specific
recommendation number (for example: Docket No. EERE-2013-BT-NOC-0039,
No. 92, Recommendation #X at p. Y). Additionally, in developing the
provisions of this final rule, DOE also has referenced discussions from
the CIP Working Group meetings regarding potential actions or comments
that may not have been formally approved as part of the Working Group
recommendations. These references to discussions or suggestions of the
CIP Working Group not found in the Working Group recommendations will
have a citation to meeting transcripts (for example: Docket No. EERE-
2013-BT-NOC-0039, No. X at p. Y).
Finally, in this final rule, DOE responds to all comments received
from interested parties in response to the proposals presented in the
April 2015 pumps test procedure NOPR, either during the April 2015 NOPR
public meeting or in subsequent written comments. In response to the
April 2015 pumps test procedure NOPR, DOE received eight written
comments in addition to the verbal comments made by interested parties
during the April 2015 NOPR public meeting. The commenters included:
Wilo USA, LLC (Wilo); the Hydraulic Institute (HI); the National
Electrical Manufacturers Association (NEMA); the Appliance Standards
Awareness Project (ASAP), Natural Resources Defense Council (NRDC),
Northwest Energy Efficiency Alliance (NEEA), and Northwest Power and
Conservation Council (NPCC), collectively referred to herein as the
energy efficiency advocates (EEAs); the Air-Conditioning, Heating, &
Refrigeration Institute (AHRI); the Association of Pool & Spa
Professionals (APSP); Pacific Gas and Electric Company (PG&E), Southern
California Gas Company (SCG), Southern California Edison (SCE), and San
Diego Gas and Electric Company (SDG&E), collectively referred to herein
as the CA IOUs. DOE will identify comments received in response to the
April 2015 pumps test procedure NOPR by the commenter, the number of
document as listed in the docket maintained at www.regulations.gov
(Docket No. EERE-2013-BT-TP-0055), and the page number of that document
where the comment appears (for example: HI, No. 8 at p. 4). If a
comment was made verbally during the NOPR public meeting, DOE will also
specifically identify those as being located in the NOPR public meeting
transcript (for example: HI, NOPR public meeting transcript, No. 7 at
p. 235). This final rule also contains comments submitted in response
to the pumps energy conservation standards rulemaking (Docket No. EERE-
2011-BT-STD-0031) and such comments will be identified with that docket
number.
II. Summary of the Final Rule
In this final rule, DOE is establishing a new subpart Y to part 431
of Title 10 of the Code of Federal Regulations that contains
definitions and a test procedure applicable to pumps. This final rule
also contains sampling plans for pumps for the purposes of making
representations regarding the energy consumption of applicable pumps
and demonstrating compliance with any energy conservation standards
that DOE adopts.
DOE notes that equipment meeting the pump definition is already
covered equipment. In this final rule, DOE is establishing definitions
for the term pump, certain pump components, and several categories and
configurations of pumps. While the range of equipment included in DOE's
definition of pump is broad, the test procedure established by this
rulemaking is limited to a specific scope of pumps, as described in
section III.A of this final rule; specifically certain kinds of
rotodynamic pumps \7\ for which standards are being considered in DOE's
energy conservation standards rulemaking. (Docket No. EERE-2011-BT-STD-
0031)
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\7\ A rotodynamic (or centrifugal) pump is a kinetic machine
that continuously imparts energy to the pumped fluid by means of a
rotating impeller, propeller, or rotor. This kind of pump is in
contrast to positive-displacement pumps, which have an expanding
cavity on the suction side and a decreasing cavity on the discharge
side that move a constant volume of fluid for each cycle of
operation.
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DOE's approach adopted in this final rule establishes a new metric,
the pump energy index (PEI), to rate the energy performance of pumps
subject to this test procedure. The test procedure contains methods for
determining constant load pump energy index (PEICL) for
pumps sold without continuous or non-continuous controls and the
variable load pump energy index (PEIVL) for pumps sold with
either
[[Page 4089]]
continuous or non-continuous controls. Both PEICL and
PEIVL describe the weighted average performance of the rated
pump at specific load points, normalized with respect to the
performance of a minimally compliant pump without controls.
The test procedure contains methods to determine the appropriate
index for all equipment for which this test procedure applies using
either calculation-based methods and/or testing-based methods. While
both methods include some amount of testing and some amount of
calculation, the terms ``calculation-based'' and ``testing-based'' are
used to distinguish between methods in which the input power to the
pump is determined either by (a) measuring the bare pump shaft input
power \8\ and calculating efficiency, or losses, of the motor and any
continuous control \9\ (i.e., calculation-based method) or (b)
measuring the input power to the driver,\10\ or motor, and any
continuous or non-continuous controls \11\ for a given pump directly
(i.e., testing-based method). For both the testing-based and
calculation-based approaches, the test procedure for pumps established
in this final rule is based on the test methods contained in HI
Standard 40.6-2014, ``Methods for Rotodynamic Pump Efficiency
Testing,'' (``HI 40.6-2014''), with slight modifications as noted in
section III.C.2.
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\8\ The term ``pump shaft input power'' is referred to as ``pump
power input'' in HI 40.6-2014. The term ``pump shaft input power''
is used synonymously with that term in this document.
\9\ DOE notes that for non-continuous controls, as defined in
section III.E.1.c, PEIVL can only be determined using a
``testing-based'' method. If a calculation-based method is desired,
the pump would instead be rated as a pump sold with a motor and
without speed controls using the PEICL metric. See
section III.E.1.c for further discussion.
\10\ The input power to the driver is referred to as ``driver
power input'' in HI 40.6-2014. The term ``input power to the
driver'' is used synonymously with that term in this document.
\11\ In the case wherein a pump is sold with a motor equipped
with either continuous or non-continuous controls and is rated using
the testing-based method, the input power to the pump would be
determined as the input power to the continuous or non-continuous
control. See section III.E.2.c.
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The test procedure also prescribes the specific categories and
configurations of pumps to which the calculation-based and testing-
based methods are applicable. As discussed further in section III.E.2,
the testing-based methods are applicable to all pumps that are subject
to the test procedure, while the calculation-based methods are only
applicable to (1) pumps sold with neither a motor nor controls (i.e.,
``bare pump,'' discussed later in section III.A.1.a), (2) pumps sold
with motors that are subject to DOE's energy conservation standards for
electric motors \12\ (with or without continuous controls), and (3)
pumps sold with submersible motors (with or without continuous
controls).
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\12\ All references to ``motors that are subject to the DOE's
energy conservation standards for electric motors'' refer to those
motors that are subject to the energy conservation standards for
electric motors at 431.25(g) (as established in the May 2014 medium
electric motor energy conservation standard final rule. 79 FR 30933
(May 29, 2014)). See section III.D.1 and III.E.1 for more
discussion.
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Regardless of the metric (i.e., PEICL versus
PEIVL) or test method (i.e., calculation-based versus
testing-based), the results for the given pump are divided by the
calculated input power to the motor for a hypothetical pump that serves
an identical hydraulic load and minimally complies with any energy
conservation standards that DOE may set as a result of the ongoing
standards rulemaking. (Docket No. EERE-2011-BT-STD-0031) This
normalized metric results in a value that is indexed to the standard
(i.e., a value of 1.0 for a pump that is minimally compliant, and a
value less than 1.0 for a pump that is less consumptive than the
maximum the standard allows).
This final rule also establishes requirements regarding the
sampling plan and representations for covered pumps at subpart B of
part 429 of Title 10 of the Code of Federal Regulations. The sampling
plan requirements are similar to those for several other types of
commercial equipment and are appropriate for pumps based on the
expected range of measurement uncertainty and manufacturing tolerances
for this equipment. For those pumps addressed by this test procedure,
DOE is also specifying the energy consumption or energy efficiency
representations that may be made, in addition to the regulated metric
(PEICL or PEIVL).
Beginning on the compliance date for any energy conservation
standards that DOE may set, all pumps within the scope of those energy
conservation standards would be required to be tested in accordance
with subpart Y of part 431 and must have their testing performed in a
manner consistent with the applicable sampling requirements.
Manufacturers must make all representations of pump efficiency, overall
(wire-to-water) efficiency, bowl efficiency, driver power input, pump
power input (brake or shaft horsepower), and/or pump power output
(hydraulic horsepower) using methods that will generate values
consistent with the DOE test procedure beginning 180 days after the
publication date of this final rule in the Federal Register. Similarly,
all representations regarding PEICL, PEIVL,
PERCL, or PERVL would be required to be made
based on values consistent with the adopted pump test procedure 180
days after the publication date of any final rule establishing energy
conservation standards for those pumps that are addressed by the test
procedure. See 42 U.S.C. 6314(d). DOE understands that manufacturers of
pumps likely have historical test data (e.g., existing pump curves)
which were developed with methods consistent with the DOE test
procedure being adopted in this final rule. DOE notes that it does not
expect manufacturers to regenerate all of the historical test data
unless the rating resulting from the historical methods, which is based
on the same methodology being adopted in this final rule, would no
longer be valid.
III. Discussion
This final rule places a new test procedure for pumps and related
definitions in a new subpart Y of part 431, and adds new sampling plans
and reporting requirements for this equipment in a new section 429.59
of 10 CFR part 429. Subpart Y contains definitions, materials
incorporated by reference, and the test procedure for certain
categories and configurations of pumps established as a result of this
rulemaking, as well as any energy conservation standards for pumps
resulting from the ongoing energy conservation standard rulemaking, as
shown in Table III.1. (Docket No. EERE-2011-BT-STD-0031)
Table III.1--Summary of Relevant Provisions Addressed in This Final Rule, Their Location Within the Code of
Federal Regulations, and the Applicable Preamble Discussion
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Applicable preamble
Location Proposal Summary of additions discussion
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10 CFR 429.59 *.................... Sampling Plan......... Number of pumps to be Section III.G.
tested to rate a pump
basic model and
calculation of rating.
[[Page 4090]]
10 CFR 431.461..................... Purpose and Scope..... Scope of pump regulations, Section III.A.
as well as the proposed
test procedure and
associated energy
conservation standards.
10 CFR 431.462..................... Definitions........... Definitions pertinent to Section III.A.
establishing equipment
classes and testing
applicable classes of
pumps.
10 CFR 431.463..................... Incorporation by Description of industry Sections III.A and
Reference. standards incorporated by III.C.
reference in the DOE test
procedure or related
definitions.
10 CFR 431.464 and Appendix A to Test Procedure........ Instructions for Sections III.B, III.C,
Subpart Y of Part 431. determining the PEICL or III.D, and III.E.
PEIVL for applicable
classes of pumps.
10 CFR 431.466..................... Energy Conservation Energy conservation Section III.A and
Standards. standard for applicable Docket EERE-2011-BT-
classes of pumps, in terms STD-0031.
of PEI and associated C-
Value.
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* Note: DOE is also making minor modifications to 10 CFR 429.2; 429.11(a) and (b); 429.12(b)(13); 429.70;
429.72; 429.102; and 429.134 to apply the general sampling requirements established in these sections to the
equipment-specific sampling requirements for pumps at 10 CFR 429.59.
The following sections discuss DOE's new provisions regarding
testing and sampling requirements for pumps, including:
(1) Scope,
(2) rating metric,
(3) determination of pump performance,
(4) determination of motor efficiency,
(5) test methods for different combinations of bare pumps, drivers
and controls,
(6) representations, and
(7) sampling plans.
These sections also present any pertinent comments DOE received in
response to the April 2015 pumps test procedure NOPR or the parallel
pumps energy conservation standards rulemaking (Docket No. EERE-2011-
BT-STD-0031), as well as DOE's responses to those comments and the
resulting changes to the test procedure as proposed in the NOPR.
A. Scope
The term ``pump'' is listed as a type of covered equipment under
EPCA; however, that term is undefined. See 42 U.S.C. 6311(1)(A). In the
April 2015 pumps test procedure NOPR, consistent with recommendations
from the CIP Working Group (Docket No. EERE-2013-BT-NOC-0039, No. 92,
Recommendations #4 and 6-8 at pp. 2-4), DOE proposed definitions for
the term pump, as covered equipment, and related components of pumps.
80 FR 17586, 17591 (April 1, 2015). In addition, DOE proposed to define
which pumps would need to be tested using the test procedure
established in this rulemaking by applying three criteria: (1) The
equipment category; (2) the application; and (3) applicable performance
specifications--i.e., horsepower (hp), flow rate, head, design
temperature, and speed restrictions. Id.
In response to DOE's proposed definitions and scope of the test
procedure for pumps, HI commented that it detected no inconsistencies
with the scope of the pump test procedure and energy conservation
standard rulemakings. (HI, No. 8 at p. 4)
DOE's criteria for establishing which pumps will be subject to the
test procedure, including any additional comments received by
interested parties on those particular topics, are discussed in
sections III.A.1 through III.A.6, respectively.
1. Definitions Related to the Scope of Covered Pumps
To help explain the scope for this rule and the manner in which
both the procedure and related standards will be applied to different
pump configurations and categories of pumps, the aforementioned
definitions for pump, certain pump components, and other specific pump
characteristics, are discussed in the following subsections.
a. Pumps and Related Components
As part of its collective efforts to help DOE craft an appropriate
regulatory approach to pumps, the CIP Working Group made a series of
recommendations regarding a variety of potential definitions that would
define ``pump,'' the covered equipment. In particular, the Working
Group offered a definition for ``pump'' along with the related terms
``bare pump,'' ``mechanical equipment,'' ``driver,'' and ``controls.''
(Docket No. EERE-2013-BT-NOC-0039, No. 92, Recommendations #1 and 2 at
pp. 1-2) Accordingly, in the April 2015 pumps test procedure NOPR, DOE
proposed adopting these recommended definitions with slight
modification. 80 FR 17586, 17591 (April 1, 2015). Specifically, in the
April 2015 pumps test procedure NOPR, DOE proposed the following terms:
Pump means equipment that is designed to move liquids
(which may include entrained gases, free solids, and totally dissolved
solids) by physical or mechanical action and includes at least a bare
pump and, if included by the manufacturer at the time of sale,
mechanical equipment, driver, and controls.
Bare pump means a pump excluding mechanical equipment,
driver, and controls.
Mechanical equipment means any component of a pump that
transfers energy from a driver to the bare pump.
Driver means the machine providing mechanical input to
drive a bare pump directly or through the use of mechanical equipment.
Examples include, but are not limited to, an electric motor, internal
combustion engine, or gas/steam turbine.
Control means any device that can be used to operate the
driver. Examples include, but are not limited to, continuous or non-
continuous controls, schedule-based controls, on/off switches, and
float switches.
80 FR 17586, 17591-92 (April 1, 2015).
HI expressed agreement with the proposed definitions, except for
the text ``entrained gases'' in the proposed definition for pump. HI
indicated that the text ``entrained gasses'' should be changed to
``dissolved gasses'' because pumps within scope are not designed to
pump entrained gas, and small amounts
[[Page 4091]]
of entrained gas would result in a loss of performance and efficiency.
(HI, No. 8 at p. 4)
DOE understands that, whereas dissolved gases are in solution and
would not appear as bubbles in the pumped liquid, entrained gases are
not in solution and would appear as bubbles in the pumped liquid. In
addition, DOE agrees that pumps within the scope of this rulemaking are
not designed to pump entrained gas. This has been acknowledged through
the definition of ``clean water pump,'' as described in section III.A.3
of this final rule, which specifies that the total gas content of the
water must not exceed the saturation volume.\13\ However, the
definition for ``pump'' applies in general to all pumps, which are
covered under EPCA (see 42 U.S.C. 6311(1)(A)), and is broader than the
scope of this rulemaking. Changing the language in the definition of
``pump'' from ``dissolved gasses'' to ``entrained gasses'' would
suggest that DOE's coverage of pumps was limited. In addition, such a
change would limit DOE's coverage to a subset of the pumps intended by
the Working Group and proposed in the NOPR. Therefore, DOE declines to
make the requested change.
---------------------------------------------------------------------------
\13\ In general, entrained gasses, or gas bubbles, will only
form when the total gas content of the water is above the saturation
volume of the liquid. Otherwise, gases are more likely to stay
dissolved in the liquid and not generate gas bubbles.
---------------------------------------------------------------------------
DOE did not receive comments on other aspects of the ``pump''
definition or on the other terms discussed in this section. As such,
DOE is adopting definitions for the terms ``pump,'' ``bare pump,''
``mechanical equipment,'' ``driver,'' and ``control'' as proposed in
the April 2015 pumps test procedure NOPR without further changes.
b. Definition of Categories of Controls
The definition of ``control'' established in this final rule is
broad. DOE acknowledges the definition may include many different kinds
of electronic or mechanical devices that can ``control the driver'' of
a pump (e.g., continuous or non-continuous controls, timers, and on/off
switches). These various controls may use a variety of mechanisms to
control the pump for operational reasons, which may or may not result
in reduced energy consumption.
In the April 2015 pumps test procedure NOPR, DOE proposed specific
test methods for pumps that are sold with motors that are paired with
controls that adjust the speed of the driver, as DOE determined that
these were the most common type of controls that reduced energy
consumption in the field. Similarly, DOE proposed that such pumps
equipped with speed controls could apply the PEIVL metric.
80 FR 17586, 17592-93 (April 1, 2015). Additionally, DOE proposed that
pumps sold with motors and controls other than speed controls \14\
would be subject to the appropriate bare pump and motor test procedures
and rated using PEICL. Id.
---------------------------------------------------------------------------
\14\ Here and throughout this final rule, DOE uses the term
``speed controls'' to refer to continuous and non-continuous
controls, as defined in section III.A.1.b of this document.
---------------------------------------------------------------------------
To explicitly establish the kinds of controls that may apply the
PEIVL metric under the test procedure, DOE proposed to
define the terms ``continuous control'' and ``non-continuous control''
(see sections III.B and III.E for further discussion of the
PEIVL rating metric and its applicability to pumps with
controls, respectively):
Continuous control means a control that adjusts the speed
of the pump driver continuously over the driver operating speed range
in response to incremental changes in the required pump flow, head, or
power output.\15\ As an example, variable speed drives (VSDs),
including variable frequency drives and electronically commutated
motors (ECMs), meet the definition for continuous controls.
---------------------------------------------------------------------------
\15\ HI-40.6, as incorporated by reference, defines pump power
output as ``the mechanical power transferred to the liquid as it
passes through the pump, also known as pump hydraulic power.''
---------------------------------------------------------------------------
Non-continuous control means a control that adjusts the
speed of a driver to one of a discrete number of non-continuous preset
operating speeds, and does not respond to incremental reductions in the
required pump flow, head, or power output. As an example, multi-speed
motors such as two-speed motors meet the definition for non-continuous
controls.
80 FR 17586, 17592-93 (April 1, 2015).
DOE requested comment on the proposed definitions of ``continuous
control'' and ``non-continuous control.'' DOE also requested comment on
the likelihood of a pump with continuous or non-continuous controls
being distributed in commerce, but never being paired with any sensor
or feedback mechanisms that would enable energy savings. In response,
HI commented that it agrees with the proposed definitions for
continuous control and non-continuous control, and that it does not
have data on pumps with speed controls being distributed in commerce
without any sensor or feedback mechanisms. (HI, No. 8 at p. 4)
During the public meeting, Regal Beloit requested a clarification
related to DOE's definitions of continuous control and non-continuous
control. Specifically, Regal Beloit requested clarification regarding
whether pumps sold with multi-pole motors and ``single-speed controls,
which would be considered multi-speed,'' would be classified as pumps
sold with non-continuous controls. (Regal Beloit, NOPR public meeting
transcript, No. 7 at p. 98). With respect to Regal Beloit's use of the
term ``single-speed controls,'' DOE believes that Regal Beloit is
referring to ``multi-speed'' permanent split capacitor (PSC) motors,
which are PSC motors that are offered with two or more discrete speed
options. Depending on the specific model, speeds may be adjusted
manually with a switch or automatically with a type of control logic.
Similarly, multi-pole motors are induction motors that are offered with
two or more discrete speed options. Again, speeds may be adjusted
manually with a switch or automatically with a type of control logic.
In this final rule, DOE clarifies that, to the extent multi-pole
motors and multi-speed PSC motors control the driver speed discretely
(via manual switch or control logic) in response to incremental
reductions in the required flow, head, or pump power output, such
motors would meet the definition of non-continuous controls and would
be tested in accordance with the applicable test procedure for pumps
sold with motors and non-continuous controls (see section III.E). DOE
also clarifies in this final rule that any control that can achieve the
specified load points on the reference system curve (see section
III.E.2.c) meets DOE's definition of continuous control, as it can
achieve the specific flow rate and head values specified by the
reference system curve in the test procedure.
CA IOUs asked during the April 2015 NOPR public meeting whether DOE
would consider differentiating between two-speed and multi-speed
motors, and stated that if more discrete speeds are available there is
more opportunity to match the pump and motor to the load. (CA IOUs,
NOPR public meeting transcript, No. 7 at pp. 98-99) DOE believes that
in this context, CA IOUs is referring to ``multi-speed motors'' as
motors with more than two discrete speeds.
DOE believes the definition of non-continuous control adequately
covers all motors with two or more discrete speeds that are sold with
any control mechanism that controls the motor speed discretely (e.g.,
manual switch or control logic). Furthermore, the test procedure for
pumps sold with motors and non-continuous controls, as proposed in the
April 2015 pumps test procedure NOPR, contains provisions
[[Page 4092]]
that will typically allow motors with three or more speeds to achieve a
lower (less consumptive) PEIVL rating than motors with only
two speeds. This procedure is outlined in detail in section III.E.2.c.
Consequently, DOE believes that motors with differing numbers of
discrete speed options are already differentiated in the proposed test
procedure and has determined that it is not necessary to further
differentiate between two-speed and multi-speed motors.
After considering HI's agreement with the proposed definitions and
the questions raised by Regal Beloit and CA IOUs, DOE is adopting, in
this final rule, the definitions for continuous and non-continuous
controls, as proposed in the April 2015 pumps test procedure NOPR.
c. Definition of Basic Model
In the course of regulating consumer products and commercial and
industrial equipment, DOE has developed the concept of a ``basic
model'' to determine the specific product or equipment configuration(s)
to which the regulations would apply. For the purposes of applying
pumps regulations, DOE proposed to define what constitutes a basic
model of pump.
In the April 2015 pumps test procedure NOPR, DOE defined a basic
model in a manner similar to the definitions used for other commercial
and industrial equipment, with the exception of two pump-specific
issues. Specifically, DOE proposed to define basic model as it applies
to pumps to include all units of a given covered equipment type (or
class thereof) manufactured by one manufacturer, having the same
primary energy source, and having essentially identical electrical,
physical, and functional (or hydraulic) characteristics that affect
energy consumption, energy efficiency, water consumption, or water
efficiency; except that:
(1) Variation in the number of stages particular radially split,
multi-sage vertical in-line casing diffuser (RSV) \16\ and vertical
turbine submersible (VTS) pump units are sold with would not result in
different basic models; and
---------------------------------------------------------------------------
\16\ The acronym RSV abbreviates ``radially split vertical,''
which is a key characteristic of the radially split, multi-stage
vertical in-line casing diffuser equipment category.
---------------------------------------------------------------------------
(2) pump models for which the bare pump differs in impeller
diameter, or impeller trim, may be considered a single basic model.
80 FR 17586, 17593 and 17641 (April 1, 2015).
The first modification to the basic model definition applies to
variation in the number of stages for multi-stage bare pumps,\17\ which
DOE believes will significantly reduce testing burden and is consistent
with DOE's proposed test procedure provision that such pumps be tested
with a specific number of stages, as discussed in section III.C.2.c.
DOE did not receive any comments on the exception to the general basic
model definition that different stage versions of multi-stage pumps
would be treated as the same basic model and, as such, is adopting this
pump-specific provision as proposed, with minor wording revisions for
clarity.
---------------------------------------------------------------------------
\17\ The implications of the resulting variation in motor
selection for pumps sold with motors or motors and controls is
discussed in section III.A.1.d.
---------------------------------------------------------------------------
The second modification to the typical basic model definition
proposed in the April 2015 pumps test procedure NOPR was that a trimmed
impeller, though it may impact efficiency, would not be a basis for
requiring different bare pump models to be rated as unique basic
models.\18\ DOE also proposed to base the certified rating for a given
pump basic model on that model's full impeller diameter--specifically,
all PEI and PER representations for the members of a basic model would
be based upon the full impeller model. 80 FR 17586, 17593-94 (April 1,
2015). This proposal is consistent with the Working Group
recommendation that the rating of a given pump basic model should be
based on testing at full impeller diameter only and that DOE not
require testing at reduced impeller diameters. (Docket No. EERE-2013-
BT-NOC-0039, No. 92, Recommendation #7 at p. 3)
---------------------------------------------------------------------------
\18\ The implications of the resulting variation in motor
selection for pumps sold with motors or motors and controls is
discussed in section III.A.1.d.
---------------------------------------------------------------------------
Relevant to this proposed requirement, DOE proposed to define the
term ``full impeller'' as it pertains to the rating of pump models in
accordance with the test procedure. Specifically, DOE proposed to
define full impeller as the maximum diameter impeller with which the
pump is distributed in commerce in the United States or the maximum
impeller diameter represented in the manufacturer's literature,
whichever is larger. For pumps that may only be sold with a trimmed
impeller due to a custom application, DOE proposed to define the full
impeller as the maximum diameter impeller with which the pump is
distributed in commerce. 80 FR 17586, 17593-94 (April 1, 2015)
Under DOE's proposed definition of ``full impeller,'' manufacturers
would also be able to represent a model with a trimmed impeller as less
consumptive than one with a full impeller. To do so, they would treat
that trimmed impeller model as a different basic model and test a
representative number of units at the maximum diameter distributed in
commerce of that trimmed basic model listing. In such a case, the
impeller trim with which the pump is rated would become the ``full
impeller diameter.'' In these cases, manufacturers could elect to (1)
group individual pump units with bare pumps that vary only in impeller
diameter into a single basic model or (2) establish separate basic
models (with unique ratings) for any number of unique impeller trims,
provided that the PEI rating associated with any individual model were
based on the maximum diameter impeller for that basic model and that
basic model is compliant with any energy conservation standards
established as part of the parallel pumps energy conservation standards
rulemaking. (Docket No. EERE-2011-BT-STD-0031; 80 FR 17586, 17593-94
(April 1, 2015)).
DOE noted that, while manufacturers would be able to group pump
models with various impeller trims under one basic model with the same
certified PEI rating based on the full impeller diameter, all
representations of PEI and PER for any individual model would be (1)
based on testing of the model with the full impeller diameter in the
basic model and (2) rated using method A.1, ``bare pump with default
motor efficiency and default motor part load loss curve'' (explained
further in section III.E), regardless of the actual impeller size used
with a given pump. Id.
At the April 2015 NOPR public meeting, interested parties
representing HI \19\ expressed concern regarding the option to consider
pumps with trimmed impellers as separate basic models. Specifically,
one HI representative from Patterson Pump Company noted that the
premise was contrary to the Working Group's agreement that all
representations for PEI would be done using full impeller diameter, not
trimmed impeller diameter. Another HI representative from Xylem (Mark
Handzel) stated that reporting is greatly simplified if only reported
for full impeller diameter. (HI, NOPR public meeting transcript, No. 7
at pp. 29, 32). The CA IOUs responded that the Working Group had only
agreed to what was going to be required for reporting on a mandatory
basis, and that its
[[Page 4093]]
preference was to maintain the flexibility for manufacturers to
voluntarily report the information for pumps with trimmed impellers.
(CA IOUs, NOPR public meeting transcript, No. 7 at pp. 34, 36)
Furthermore, in its written comments, HI agreed with the proposed
definition of the term ``basic model,'' which allows manufacturers the
option of rating pumps with trimmed impellers as a single basic model
or separate basic models. (HI, No. 8 at p. 4) HI also agreed with DOE's
proposed definition of full impeller and the proposal that all pump
models be rated in a full impeller configuration only. (HI, No. 8 at p.
5)
---------------------------------------------------------------------------
\19\ Several interested parties identified themselves as
representing HI at the April 2015 NOPR public meeting, including Bob
Barbour from TACO, Inc.; HI representatives from Xylem (Mark Handzel
and Raul Ruzicka), and Al Huber from Patterson Pump Company.
---------------------------------------------------------------------------
In response, DOE reaffirms that only reporting PEI at full impeller
diameter will be mandatory. Given that some interested parties stated
that they prefer maintaining the option of rating pumps with trimmed
impellers as separate basic models, and HI did not indicate concern
with this option in the written comments, DOE is maintaining the option
to rate pumps with trimmed impellers as separate basic models in this
final rule. Furthermore, DOE notes that in the case a manufacturer
chooses to rate pumps with trimmed impellers as separate basic models,
the full impeller definition is still applicable and all
representations regarding the PEI and PER must be based on the ``full
impeller'' diameter for that basic model.
Upon further review of the proposed definition for ``full
impeller,'' DOE has determined that the language within the definition
is duplicative, and therefore, potentially confusing. Specifically, in
the proposed definition, DOE referred to both distribution in commerce
and representations in manufacturer literature. However, DOE notes that
42 U.S.C. 4291(16) defines distribution in commerce as meaning ``to
sell in commerce, to import, to introduce or deliver for introduction
into commerce, or to hold for sale or distribution after introduction
into commerce.'' This definition encompasses making advertising
materials such as representations in manufacturer literature.
Accordingly, DOE has revised the definition for full impeller diameter
as set forth in the regulatory text of this rule (10 CFR 431.62).
d. Basic Models of Pumps Sold With Motors or Motors and Speed Controls
In the April 2015 pumps test procedure NOPR, DOE noted that, for
pumps sold with motors and pumps sold with motors and continuous or
non-continuous controls, pump manufacturers may pair a given pump with
several different motors that have different performance
characteristics. 80 FR 17586, 17594 (April 1, 2015). Under the
definition of basic model proposed in the April 2015 pumps test
procedure NOPR and discussed in section III.A.1.c, each unique pump and
motor pairing represents a unique basic model. However, DOE noted that,
consistent with DOE's practice with other products and equipment, pump
manufacturers may elect to group similar individual pump models within
the same equipment class into the same basic model to reduce testing
burden, provided all representations regarding the energy use of pumps
within that basic model are identical and based on the most consumptive
unit. See 76 FR 12422, 12423 (March 7, 2011). In addition, consistent
with DOE's treatment of variation in the number of stages for multi-
stage RSV and VTS pumps and impeller trim, in the April 2015 pump test
procedure NOPR, DOE proposed that variation in motor sizing as a result
of different impeller trims or different number of stages for multi-
stage pumps would not serve as a basis for differentiating basic
models. 80 FR 17586, 17593 (April 1, 2015)
In response, HI recommended that DOE clarify the definition of
``basic model,'' stating that ``pump manufacturers may pair a given
pump with several different motors with different performance
characteristics, and can include all combinations under one basic model
as long as the representations regarding the energy use is based on the
most consumptive unit for each given pole speed, given clean water with
a specific gravity of 1.0 . . . [A]s variation in impeller trim of the
bare pump does not constitute a characteristic that would differentiate
basic models, variation in motor sizing as a result of different
impeller trims would also not serve as a basis for differentiating
basic models.'' (HI, No. 8 at p. 5)
In general, DOE agrees with HI's interpretation. DOE agrees with HI
that pump manufacturers may pair a given pump with several different
motors with different performance characteristics, and can include all
combinations under one basic model if the certification of energy use
and all representations made by the manufacturer, are based on the most
consumptive bare pump/motor combination for each basic model and are
determined in accordance with the DOE test procedure and applicable
sampling plans. Furthermore, because variation in impeller trim of the
bare pump is not a basis for requiring models to be rated as unique
basic models, DOE agrees that variation in the horsepower rating of the
paired motor as a result of different impeller trims within a basic
model would also not necessarily be a basis for requiring units to be
rated as unique basic models. Similarly since RSV and VTS pumps may be
sold with varying numbers of stages, the horsepower rating of the
paired motor may also vary correspondingly. DOE notes that this
variation in motor horsepower does not necessarily constitute a
characteristic that will define separate basic models.
However, variation in motor sizing (i.e., horsepower rating) may
also be associated with variation in motor efficiency, which is a
performance characteristic; typically larger motors are more efficient
than smaller motors. For this reason, in response to HI, DOE clarifies
that in order to group pumps sold with motors (or motors and controls)
into a single basic model (in contrast to grouping bare pumps with
variations in impeller trim into a single basic model, as discussed in
the previous section), each motor offered in a pump included in that
basic model must have motor efficiency rated at the Federal minimum
(see the appropriate table for NEMA Design B motors at 10 CFR 431.25)
\20\ or the same number of bands above the Federal minimum for each
respective motor horsepower (see Table 3 of Appendix A to Subpart Y of
Part 431).) \21\ For example, the Federal minimum for a NEMA Design B 5
HP, 2-pole, enclosed motor in 10 CFR 431.25 is 88.5. A manufacturer is
rating the pump and motor combination with a 90.2 percent efficient
motor. In Table 3 of Appendix A to Subpart Y of Part 431, 90.2 is two
bands above 88.5. Therefore, for a NEMA Design B 3 HP, 2-pole enclosed
motor, in order to be considered as the same basic model, the
manufacturer cannot distribute it with a motor with an efficiency less
than 88.5 percent, which in Table 3 is two bands above the Federal
minimum. If the manufacturer wishes to rate it with a less efficient
motor, it must be rated as a separate basic model. This approach will
ensure that the PEI and PER representations for the entire basic model
will be representative of the performance across various impeller trims
and motor horsepower. DOE has added this clarification to the
definition of basic model.
---------------------------------------------------------------------------
\20\ For submersible motors, refer to the default motor
efficiency values in this test procedure, shown in Table 2 of
Appendix A to Subpart Y of Part 431, with further discussion in
section III.D.1.b.
\21\ See section III.D.1.b for further discussion of Table 3.
---------------------------------------------------------------------------
DOE did not receive any other comments from interested parties
regarding basic models for pumps sold
[[Page 4094]]
with motors or motors and speed controls.
2. Equipment Categories
In the April 2015 pumps test procedure NOPR, DOE proposed that the
test procedure be applicable to the following pump equipment
categories: end suction close-coupled (ESCC), end suction frame mounted
(ESFM), in-line (IL), RSV, and VTS pumps. 80 FR 17586, 17594-95 (April
1, 2015). DOE also proposed that the test procedure would not be
applicable to certain categories of pumps, including circulators,
dedicated purpose pool pumps, axial/mixed flow pumps, and positive
displacement pumps. Id. at 17597. These proposals were based on the
recommendation of the Working Group. (Docket No. EERE-2013-BT-NOC-0039,
No. 92, Recommendation #4, 5A, 5B, and 6 at p. 2) DOE also noted that,
while intended to be consistent with this test procedure, the scope of
any energy conservation standards proposed for pumps would be discussed
as part of a separate rulemaking. Id.
DOE requested comment on the proposed applicability of the test
procedure to the five pump equipment categories noted above, namely
ESCC, ESFM, IL, RSV, and VTS pumps. HI commented that it agrees that
the proposed test procedure was applicable to the five pump equipment
categories noted. (HI, No. 8 at p. 5) HI also agreed that circulators
and pool pumps should be handled under two separate rulemakings. (HI,
No. 8 at p. 7) No other interested parties provided comments on the
scope of applicability of the proposed test procedure. As the
amendments DOE is making to the proposed test procedure provisions do
not significantly change the test methods or approach specified in the
pump test procedure, and receiving no dissenting comments, DOE adopts
its proposal that the test procedure provisions established in this
final rule are applicable to the same scope of pumps discussed in the
April 2015 pumps test procedure NOPR. 80 FR 17586, 17591-17601 (April
1, 2015).
The specific definitions and specifications DOE proposed to
establish the scope of the test procedure, and any comments DOE
received on those definitions, are discussed in the subsequent sections
III.A.2.a, III.A.2.b, III.A.2.c, and III.A.2.d. The final equipment
category definitions DOE is adopting in this final rule are presented
in section III.A.2.e.
a. Definitions of Pump Equipment Categories
As noted, in the April 2015 pumps test procedure NOPR, DOE proposed
specific definitions for the five categories of pumps (i.e., ESCC,
ESFM, IL, RSV, and VTS) to establish the pumps to which the proposed
test procedure is applicable. 80 FR 17586, 17595-96 and 17641-42 (April
1, 2015). To assist in defining these five pump categories, DOE also
proposed the following definitions for several specific characteristics
of the five pumps categories for which the test procedure is
applicable--namely rotodynamic pump, single-axis flow pump, and end
suction pump:
Rotodynamic pump means a pump in which energy is
continuously imparted to the pumped fluid by means of a rotating
impeller, propeller, or rotor.
Single axis flow pump means a pump in which the liquid
inlet of the bare pump is on the same axis as the liquid discharge of
the bare pump.
End suction pump means a rotodynamic pump that is single-
stage and in which the liquid enters the bare pump in a direction
parallel to the impeller shaft and on the end opposite the bare pump's
driver-end.
Id.
Based on these three definitions involving general pump
characteristics, DOE proposed to define the following five pump
equipment categories to which the test procedure applies as follows:
(1) End suction frame mounted (ESFM) pump means an end suction pump
wherein:
(a) the bare pump has its own impeller shaft and bearings and so
does not rely on the motor shaft to serve as the impeller shaft;
(b) the pump requires attachment to a rigid foundation to function
as designed and cannot function as designed when supported only by the
supply and discharge piping to which it is connected; and
(c) the pump does not include a basket strainer.
Examples include, but are not limited to, pumps complying with
ANSI/HI nomenclature OH0 and OH1, as described in ANSI/HI 1.1-1.2-2014.
(2) End suction close-coupled (ESCC) pump means an end suction pump
in which:
(a) the motor shaft also serves as the impeller shaft for the bare
pump;
(b) the pump requires attachment to a rigid foundation to function
as designed and cannot function as designed when supported only by the
supply and discharge piping to which it is connected; and
(c) the pump does not include a basket strainer.
Examples include, but are not limited to, pumps complying with
ANSI/HI nomenclature OH7, as described in ANSI/HI 1.1-1.2-2014.
(3) In-line (IL) pump means a single-stage, single axis flow,
rotodynamic pump in which:
(a) liquid is discharged through a volute in a plane perpendicular
to the impeller shaft; and
(b) the pump requires attachment to a rigid foundation to function
as designed and cannot function as designed when supported only by the
supply and discharge piping to which it is connected.
Examples include, but are not limited to, pumps complying with
ANSI/HI nomenclature OH3, OH4, or OH5, as described in ANSI/HI 1.1-1.2-
2014.
(4) Radially split, multi-stage, vertical, in-line, diffuser casing
(RSV) pump means a vertically suspended, multi-stage, single axis flow,
rotodynamic pump in which:
(a) liquid is discharged in a plane perpendicular to the impeller
shaft;
(b) each stage (or bowl) consists of an impeller and diffuser; and.
(c) no external part of such a pump is designed to be submerged in
the pumped liquid.
Examples include, but are not limited to, pumps complying with
ANSI/HI nomenclature VS8, as described in the ANSI/HI 2.1-2.2-2008).
(5) Vertical turbine submersible (VTS) pump means a single-stage or
multi-stage rotodynamic pump that is designed to be operated with the
motor and stage(s) (or bowl(s)) fully submerged in the pumped liquid,
and in which:
(a) each stage of this pump consists of an impeller and diffuser
and
(b) liquid enters and exits each stage of the bare pump in a
direction parallel to the impeller shaft.
Examples include, but are not limited to, pumps complying with
ANSI/HI nomenclature VS0, as described in ANSI/HI 2.1-2.2-2008.
Id.
In the April 2015 pumps test procedure NOPR, DOE requested comment
on the proposed equipment category definitions and related terminology.
Comments DOE received on these definitions and DOE's responses to those
comments are discussed in the following subsections. DOE notes that
comments regarding the exclusion of circulators and dedicated-purpose
pool pumps, which are addressed in sections III.A.2.b and
[[Page 4095]]
III.A.2.c of this final rule, are also pertinent to the definitions of
the ESCC, ESFM, IL, RSV, and VTS equipment categories and are also
discussed in this section.
HI Nomenclature
DOE noted that any references to HI nomenclature in ANSI/HI 1.1-
1.2-2014 or ANSI/HI 2.1-2.2-2008 were incorporated into the definitions
of the aforementioned pump equipment categories as examples only and
clarified that, in cases where there is a conflict between the
description provided in ANSI/HI 1.1-1.2-2014 or ANSI/HI 2.1-2.2-2008,
as applicable, and DOE's definitions established at 10 CFR 431.462, the
language in the regulatory text would prevail. Id.
DOE requested comment on whether the references to ANSI/HI
nomenclature are necessary as part of the equipment definitions in the
regulatory text; whether such references would be likely to cause
confusion due to inconsistencies; and whether discussing the ANSI/HI
nomenclature in this preamble would provide sufficient reference
material for manufacturers when determining the appropriate equipment
category for their pump models. At the April 2015 NOPR public meeting,
an HI representative from Xylem (Mark Handzel) advocated the use of
ANSI/HI nomenclature without new DOE nomenclature. (HI, NOPR public
meeting transcript, No. 7 at p. 63) In written comments, HI indicated
that it affirms the importance of any pump rulemaking using ANSI/HI
designations and nomenclature, citing common usage by U.S. pump
manufacturers, distributors, engineering consulting firms, and pump
users. (HI, No. 8 at p. 6) HI also commented that all references to
ANSI/HI 2.1-2.2-2008 should be changed to ANSI/HI 2.1-2.2-2014 because
the latter is the current version. (HI, No. 8 at p. 13) The EEAs
commented that they support the proposed definitions for the pump types
to which the proposed test procedures would be applicable; they also
indicated that they believe this approach would both limit the risk
that a manufacturer could make a small change to a pump design in order
to avoid having to meet the pump efficiency standards and help to
provide clarity to manufacturers. (EEAs, No. 10 at p. 1)
After reviewing the comments, DOE is maintaining its definitions
for the pump equipment categories presented in the April 2015 pumps
test procedure NOPR, which references the ANSI/HI nomenclature as
illustrative only. DOE believes that this approach strikes the best
balance between the needs of the industry and the ability of DOE to
enforce its regulations for pumps appropriately. DOE reiterates that
the scope of the rulemaking is not limited to pumps meeting the ANSI/HI
nomenclature referenced in the definitions and that any pump model
meeting one of the DOE equipment category definitions is considered to
be part of that equipment category, whether or not the pump is
considered by the industry to be part of one of the referenced ANSI/HI
nomenclature subgroups or a different subgroup.
Further, in preparing this final rule, DOE reviewed the ANSI/HI
nomenclature to ensure that all applicable categories of pumps that
would meet DOE's proposed equipment definitions were listed. Upon
review, DOE noticed that the styles of pumps identified as OH2, OH3A,
OH5A, and OH6 in ANSI/HI 1.1-1.2-2014 may be considered by some parties
to meet ESCC, ESFM, or IL pump definitions because they share some
similar characteristics with those categories of pumps. DOE wishes to
clarify that the styles of pumps generally considered to be OH2, OH3A,
OH5A, and OH6 are covered equipment in that they meet the definition of
``pump,'' but are not subject to the test procedure established in this
final rule, since they do not fall within the specific scope of pumps
to which the test procedure is applicable. Specifically, DOE determined
that OH3A and OH5A are not within the scope of this rule because they
do not meet the definition of end-suction pump (i.e., liquid does not
enter pump in a direction parallel to the impeller shaft due to inlet
adapter) and do not meet the definition of IL pump (i.e., the flow
inlet and outlet are on the same plane but not on the same axis). In
addition, DOE believes that the majority of these OH3A and OH5A pumps
are non-clogging and thus would also be excluded because they do not
meet DOE's definition of clean water pump, as discussed further in
section III.A.3.
Regarding OH6 pumps, DOE notes that such pumps include a high speed
integral gear such that the impeller shaft will rotate faster than the
driver. While these pumps meet the definition of IL pumps, they are
excluded from the scope of pumps subject to this test procedure because
they operate at impeller speeds greater than the nominal speed
limitations discussed in section III.A.4 and III.C.2.c. In addition,
the impellers and drivers of OH6 pumps rotate at different speeds and,
thus, would be excluded based on DOE's revised specifications regarding
the impeller and driver rotating speeds of pumps addressed by this test
procedure (see section III.A.4). Similarly, DOE notes that OH2 pumps
would meet the definition of an ESFM pump, but would be excluded
because such pumps are designed specifically for pumping hydrocarbon
fluids, as noted by the American Petroleum Institute Standard 610
certification and, as such, are not clean water pumps. For these
reasons, DOE is not referencing OH2, OH3A, OH5A, or OH6 nomenclature in
the definitions of ESCC, ESFM, IL, RSV, and VTS established in this
rulemaking.
Finally, DOE notes that in April 2014, HI released an updated
version of ANSI/HI 2.1-2.2, ANSI/HI 2.1-2.2-2014. DOE reviewed ANSI/HI
2.1-2.2-2014 and found the documents to be substantially the same as
ANSI/HI 2.1-2.2-2008, with the exception of the addition of a new
definition and description for pipe length, more detailed
characteristics identified on some of the figures, and slight
reorganization of the sections to improve document flow. DOE notes that
none of these minor changes affect the content pertinent to the
references to ANSI/HI 2.1-2.2-2008 nomenclature proposed in the April
2015 pumps test procedure NOPR. As such, DOE believes that it is
appropriate to reference the most up-to-date industry standard and is
updating all references in the RSV and VTS equipment category
definitions from ANSI/HI 2.1-2.2-2008 to ANSI/HI 2.1-2.2-2014 in this
final rule.
Specific Styles of IL Pumps
In response to DOE's request for comment on all proposed pump
definitions in general, HI commented that twin head pumps, which
combine two impeller assemblies into a common single axis flow casing
with a single inlet and discharge, were not included in DOE's
definitions and should be added to the rulemaking scope. (HI, No. 8 at
p. 3) DOE notes that such pumps are a style of IL pump and, thus
subject to the test procedure and standards as an IL pump, but DOE
understands that this inclusion was not explicitly laid out in the
NOPR. As such, twin head pumps meet the definition of IL pumps as
proposed in the April 2015 pumps test procedure NOPR. Specifically,
twin head pumps are single-axis flow, rotodynamic pumps with single-
stage impellers and in which liquid is discharged through a volute in a
plane perpendicular to the impeller shaft. However, to clarify the
applicability of the IL pump definition and DOE's pump test procedure
to twin head pumps, DOE is adopting in this final rule a definition of
twin head pump as set forth in the regulatory text of this rule (10 CFR
431.62).
[[Page 4096]]
In this final rule, DOE is also clarifying the testing and
certification requirements for such pumps. For the purposes of applying
the DOE test procedure to and certifying twin head pumps, DOE is
clarifying that such pumps should be tested configured with a single
impeller assembly, as discussed further in section III.C.2.c.
RSV Pump Definition
DOE also requested specific comment on whether it needed to clarify
the flow direction to distinguish RSV pumps from other similar pumps
when determining test procedure and standards applicability and on
whether any additional language would be necessary in the proposed RSV
definition in the April 2015 pumps test procedure NOPR to make the
exclusion of immersible pumps clearer. HI commented that it believes
the icons shown and the definition found in ANSI/HI 2.1-2.2-2014
provide sufficient clarity to the flow direction, and that it does not
believe any additional language is necessary. (HI, No. 8 at pp. 6-7)
DOE reviewed the figures in ANSI/HI 2.1-2.2-2014 and believes that the
figure is illustrative of the general equipment characteristics for RSV
pumps. The description accompanying the figure also describes the
manner in which liquid enters and exits the pump. Specifically, section
2.1.3.6 of ANSI/HI 2.1-2.2-2014 states that, for RSV pumps, ``fluid
enters one nozzle of the in-line casing and is directed to the inlet of
an internal multi-stage diffuser pump. After traveling through multiple
stages, the liquid exits at the top stage of the pump where the flow is
redirected via the outer sleeve to the opposing nozzle of the in-line
casing.'' As DOE's definition of RSV pump references the figures and
description in ANSI/HI 2.1-2.2-2014, and this description of flow path
through the pump is not inconsistent or conflicting with DOE's
definition of RSV pump, DOE does not believe that further clarification
is necessary in this regard.
Regarding the exclusion of immersible pumps, HI commented that it
did not believe any additional clarification was necessary. (HI, No. 8
at pp. 6-7) Therefore, in this final rule, DOE has determined that the
adopted language is sufficient to exclude any immersible pumps from
treatment as an RSV pump for purposes of DOE's regulations.
VTS Equipment Terminology
Upon review of CIP Working Group transcripts and slides, DOE also
determined that interested parties had requested the equipment category
``vertical turbine submersible'' be termed ``submersible turbine,''
given that some of these pumps are installed horizontally. (CIP Working
Group transcript, No. 14 at p. 263) DOE notes that the definition
proposed for vertical turbine submersible is silent as to installation
orientation and, as a result, would include horizontally installed
pumps. DOE believes that referring to submersible turbine pumps as
``vertical turbine submersible,'' when horizontally mounted submersible
turbine pumps are also included in the equipment category, as defined,
could lead to confusion among manufacturers and in the market place. As
such, and given that changing the defined term from vertical turbine
submersible to submersible turbine would not change the scope of the
definition, DOE is revising the nomenclature in this final rule to
match that used in the CIP Working Group, which more accurately
describes the subject equipment. In the preamble to this final rule,
DOE has retained the VTS abbreviation for the submersible turbine
equipment category for consistency with the April 2015 pump test
procedure NOPR, pumps energy conservation standards rulemaking (Docket
No. EERE-2011-BT-STD-0031), and all Working Group discussions and
recommendations to date (Docket No. EERE-2013-BT-NOC-0039). However,
DOE is adopting the acronym ``ST'' for the regulatory text for long-
term consistency with the defined term.
ESFM Equipment Terminology
Similarly, the ``end suction frame mounted'' category proposed in
the NOPR had been referred to as ``end suction frame mounted/own
bearings'' in the CIP Working Group documentation. (See for example,
EERE-2013-BT-NOC-0039-0092 at p. 2 and EERE-2013-BT-NOC-0039-0031 at p.
4) The proposed end suction frame mounted definition would be inclusive
of own bearings pumps, or any end-suction pump that ``does not rely on
the motor shaft to serve as the impeller shaft.'' 80 FR 17586, 17641
(April 1, 2015). DOE intended the ESFM and ESCC equipment category
definitions proposed in the April 2015 pumps test procedure NOPR to be
mutually exclusive, whereby pumps that are close coupled to the motor
and share a single impeller and motor shaft would be part of the ESCC
equipment category, and all other end suction pumps that are
mechanically-coupled to the motor and for which the bare pump and motor
have separate shafts would be part of the ESFM equipment category.
DOE understands that there are several coupling and mounting
methods for pairing a bare pump and motor, in addition to frame
mounting, and that referring to the ESFM equipment category based only
on that criteria may be misleading. To clarify the applicability of the
previously defined end suction frame mounted equipment category to own
bearing pumps, and given that changing the term itself would not change
the scope of the definition, DOE is revising the nomenclature in this
final rule to match that used in the CIP Working Group. Therefore, in
this final rule, DOE is defining this equipment category as end-suction
frame mounted/own bearing and adding to the definition the term
``mechanically-coupled'' to clarify that the ESFM equipment is, in
fact, inclusive of many coupling methods. DOE is further adopting a
specific definition for ``mechanically-coupled,'' as mutually exclusive
with ``close-coupled,'' to explicitly establish the coupling methods to
which the ESFM equipment category applies. The definition of
mechanically-coupled consists of text that was in the proposed
definition for ESFM and does not change the scope of ESFM from the
proposal.
b. Circulators
Circulators, which are a specific kind of rotodynamic pump, are
small, low-head pumps similar to the IL configuration pumps that are
generally used to circulate water in hydronic space conditioning or
potable water systems in buildings.
The CIP Working Group recommended that circulators be addressed as
part of a separate rulemaking process that would involve informal
negotiation between interested parties followed by an ASRAC-approved
negotiation. (Docket No. EERE-2013-BT-NOC-0039, No. 92, Recommendation
#5A at p. 2)
In the April 2015 test procedure NOPR, DOE also proposed to exclude
circulators from the rulemaking, and proposed a definition that would
be mutually exclusive from the other pumps in the rulemaking.
Specifically, DOE proposed definitions for circulators, ESCC, ESFM, and
IL pumps that were mutually exclusive, based on the assumption that
circulators require only the support of the supply and discharge piping
to function as designed, whereas ESCC, ESFM, and IL pumps require
attachment to a rigid foundation to function as designed. In response
to the proposed circulator definition, DOE received comments from
several interested parties,
[[Page 4097]]
addressed below. However, DOE has not yet received any formal proposals
or requests for negotiation from the interested parties.
The EEAs and CA IOUs expressed concern that the portion of the
proposed circulator definition that describes circulators as
``requir[ing] only the support of the supply and discharge piping to
which it is connected to function as designed,'' may lead to the design
of circulators with alternative mounting intended to circumvent
regulation. (EEAs, No. 10 at p. 1; CA IOUs, No. 13 at pp. 4-5) HI
agreed that no pump definition should be associated with a rigid
foundation, as in the industry rigid foundation has a different
connotation than DOE is using. (HI, No. 8 at pp. 5-6, 10). HI also
disagreed with the proposed circulator definition, commenting that
there are many end suction and close-coupled IL pumps that would meet
the proposed circulator definition but that are not considered
circulators. Instead, HI stated its belief that such pumps should be
included in the scope of pumps considered in this rulemaking. As a
result, HI recommended revising the definitions of circulator, ESFM,
ESCC, and IL pumps, as well as other related definitions. (HI, No. 8 at
pp. 7-8) Following the close of the comment period, the HI circulator
pump committee resubmitted revised definitions for circulator and IL
pumps, and other related definitions. (HI, No. 15 at pp. 1-3)
DOE reviewed both sets of HI's recommended definitions and found
them to be essentially the same. Specifically, HI's circulator pump
committee offered the following revised definitions of IL pumps and
circulator pumps, which were also included in HI's comments submitted
in response to the April 2015 pumps test procedure NOPR:
``In-line pump means a single-stage, single-axis flow, dry rotor,
rotodynamic pump that has a shaft input power greater than or equal to
one horsepower and less than or equal to two hundred horsepower at BEP
and full impeller diameter, in which liquid is discharged through a
volute in a plane perpendicular to the shaft, except for: Those that
are short-coupled or close-coupled, have a maximum hydraulic power that
is less than or equal to five horsepower at the full impeller diameter
and over the full range of operation, and are distributed in commerce
with a horizontal motor. Examples include, but are not limited to,
pumps complying with ANSI/HI nomenclature OH3, OH4, or OH5, as
described in ANSI/HI 1.1-1.2-2014, within the specified horsepower
range. Pumps complying with ANSI/HI nomenclature CP1, CP2, and CP3, as
described in ANSI/HI 1.1-1.2-2014, would not meet the definition of in-
line pump.'' (HI, No. 8 at pp. 5-6; HI, No. 15 at p. 1)
``Circulator pump means a single stage, in-line, rotodynamic pump
that meets one of the following descriptions:
i. [Wet Rotor Circulator] A single-axis flow, close-coupled, wet
rotor pump that: (1) Has a maximum hydraulic power greater than or
equal to 1/40 hp and less than or equal to 5 hp at full impeller
diameter and over the full range of operation, (2) is distributed in
commerce with a horizontal motor, and (3) discharges the pumped liquid
through a volute in a plane perpendicular to the shaft. Examples
include, but are not limited to, pumps complying with ANSI/HI 1.1-1.2-
2014 nomenclature CP1; or
ii. [Dry Rotor Two-Piece Circulator] A single-axis flow, close-
coupled, dry rotor pump that: (1) Has a maximum hydraulic power greater
than or equal to 1/40 hp and less than or equal to 5 hp at full
impeller diameter and over the full range of operation, (2) is
distributed in commerce with a horizontal motor, and (3) discharges the
pumped liquid through a volute in a plane perpendicular to the shaft.
Examples include, but are not limited to, pumps complying with ANSI/HI
1.1-1.2-2014 nomenclature CP2; or
iii. [Dry Rotor Three-Piece Circulator] A single-axis flow, short-
coupled, dry rotor pump, either flexibly or rigidly coupled that: (1)
Has a maximum hydraulic power greater than or equal to 1/40 hp and less
than or equal to 5 hp at full impeller diameter and over the full range
of operation, (2) is distributed in commerce with a horizontal motor,
and (3) discharges the pumped liquid through a volute in a place
perpendicular to the shaft. Examples include, but are not limited to,
pumps complying with ANSI/HI 1.1-1.2-2014 nomenclature CP3.''
(HI, No. 8 at pp. 8-9; HI, No. 15 at p. 1)
HI also recommended several supporting definitions, including
definitions for single-axis flow pump, close-coupled pump, short-
coupled pump, rigid-coupled pump, flexibly-coupled pump, hydraulic
power, wet rotor pump, dry rotor pump, horizontal motor, and non-
horizontal motor. (HI, No. 8 at pp. 9-10; HI, No. 15 at pp. 2-3)
The EEAs and CA IOUs also stated that they are collectively
discussing an improved definition of circulators with HI. (EEAs, No. 10
at p. 1; CA IOUs, No. 13 at pp. 4-5)
In light of the continued discussions among these interested
parties regarding future definitions, test procedures, and energy
conservation standards for circulators, DOE has decided to refrain from
defining the term ``circulator'' in this rulemaking. Rather than
explicitly define the term circulator in this rule, DOE has modified
the definitions of ESCC, ESFM, IL, VTS, and RSV to specifically exclude
certain categories of pumps that are widely considered circulators by
the industry, using many of the criteria and characteristics of
circulators indicated by HI in its comments and proposed in the April
2015 pumps test procedure NOPR.
In particular, in its definition of IL pump, DOE excluded pumps
that are commonly marketed and sold as circulators in the pump industry
by utilizing the design features of a horizontal motor, as well as a
hydraulic power less than or equal to 5 hp. This is consistent with
HI's suggested definition of IL pump as well as circulator pump, which
includes reference to a horizontal motor and a horsepower range of 1/40
to 5 hydraulic hp. DOE agrees that a horizontal motor, which is a motor
that is required to be oriented with the motor shaft in a horizontal
position in order to operate as designed, is a distinguishing feature
of a circulator. To clearly establish this characteristic, DOE is also
defining the term horizontal motor in this rulemaking based on the
definition HI suggested in its comments. Specifically, HI's proposed
definition and the definition DOE is adopting in this final rule are as
follows:
Horizontal motor means a motor that requires the motor shaft to be
in a horizontal position to function as designed, as specified in the
manufacturer literature.
DOE notes that it is maintaining a lower shaft limit of 1 hp for
the IL pump equipment category and only specifically excluding those
pumps that have both: (1) A hydraulic output of less than 5 hp and (2)
a horizontal motor. As such, any IL pumps that have a shaft horsepower
greater than or equal to 1 hp and hydraulic output less than 5 hp and
are not sold with a horizontal motor, as well as IL pumps that have a
hydraulic output greater than or equal to 5 hp and shaft horsepower
less than or equal to 200 hp and are sold with a horizontal or non-
horizontal motor, would continue to be included in the IL pump
definition and subject to the test procedure established in this final
rule. DOE notes that the majority of pumps that are commonly referred
to as
[[Page 4098]]
circulators have a shaft input power less than 1 hp. Such pumps may
operate with or without horizontal motors. As such, the lower shaft
power limit in the IL pump definition excludes these pumps from the
scope of this rulemaking.
DOE also acknowledges that HI recommended establishing the
hydraulic horsepower threshold over the full range of operation of the
pump. (HI, No. 8 at pp. 5-6 and 8-9; HI, No. 15 at p. 1) However, DOE
notes that the other horsepower thresholds referenced in this final
rule reference pump shaft input power as measured at BEP. DOE also
notes that the test procedure established in this final rule contains a
specific and repeatable methodology for determining BEP of a tested
pump. Conversely, in the proposed test procedure, DOE did not define
the ``full range of operation'' of a pump or propose a method for how
to determine it. Since it is important that DOE's test procedures be as
precise and unambiguous as possible, DOE believes that it is important
that the hydraulic horsepower of a pump be determined in a consistent
manner when determining whether or not the pump meets the definition of
an IL pump and, thus, is subject to DOE's pumps test procedure
establish in this final rule. Therefore, in this final rule, DOE is
establishing the hydraulic horsepower threshold for circulator pumps as
determined at BEP. That is, DOE will exclude from the definition of IL
pump, IL pumps with a hydraulic horsepower less than 5 hp, as
determined at full impeller diameter and BEP, and that are distributed
in commerce with a horizontal motor, as those pumps are considered to
be circulator pumps.
Consistent with the changes to the IL definition, DOE is also
incorporating horsepower limits into the ESCC, ESFM, RSV, and VTS
equipment category definitions. DOE notes that, in the April 2015 pumps
test procedure NOPR, DOE proposed to establish the scope of the test
procedure using a horsepower range of greater than or equal to 1 hp and
less than 200 hp that was applicable to all ESCC, ESFM, IL, RSV, and
VTS pumps. 80 FR 17586, 17600 (April 1, 2015). However, to maintain
consistent format among the five defined equipment categories, DOE is
including this established horsepower range in each of the equipment
category definitions explicitly rather than in a separate scope
limitation. DOE discusses the horsepower range and other parameters
used to establish the scope of the test procedure in section III.A.4.
Additionally, DOE has added the design feature of a ``dry rotor''
to the definition of an IL pump \22\ and added a definition of dry
rotor pump, as suggested by HI. This feature excludes pumps that comply
with ANSI/HI nomenclature CP1, also referred to as wet rotor
circulators, as described in ANSI/HI 1.1-1.2-2014. This definition is
also consistent with HI's proposed IL and circulator pump definitions.
DOE notes that wet rotor pumps were proposed to be excluded from the
scope of the test procedure in the April 2015 pumps test procedure NOPR
under the definition of ``sealless pump.'' Specifically, DOE proposed a
definition of sealless pump to include both: (1) A pump that transmits
torque from the motor to the bare pump using a magnetic coupling and
(2) a pump in which the motor shaft also serves as the impeller shaft
for the bare pump and the motor rotor is immersed in the pumped fluid.
80 FR at 17641-42. HI's proposed definition of wet rotor is identical
to the second clause of DOE's proposed sealless pump definition. As
such, in this final rule, DOE defines dry rotor pump, consistent with
the definition proposed by HI, and to incorporate the term dry rotor
into the ESFM, ESCC, IL, RSV, and VTS equipment category definitions.
Given the mutually exclusive relationship between wet and dry rotor
pumps, the definitions of ESCC, ESFM, IL, RSV, and VTS pumps, as
established in section III.A.2.a, now implicitly exclude wet rotor
pumps from the scope of this test procedure. This implicit exclusion of
wet rotor pumps alleviates the need to explicitly exclude wet rotor
pumps using the definition of sealless pump as proposed in the NOPR.
Further discussion of modifications to the definition of sealless pump
are found in section III.A.2.b.
---------------------------------------------------------------------------
\22\ In the NOPR, DOE had excluded sealless pumps, including wet
rotor pumps, from the scope of the rulemaking in addition to
explicitly limiting the defined pump categories to dry rotor pumps.
80 FR 17586, 17598-99 (April 1, 2015) See section III.A.3.b.
---------------------------------------------------------------------------
DOE also acknowledges the concern from interested parties regarding
the potential issues associated with referencing attachment to a rigid
foundation. As noted in the NOPR, DOE initially proposed such a design
feature to clearly differentiate and exclude circulators from other,
similar categories of pumps that would be subject to the proposed test
procedure. However, DOE has, based on comments received from interested
parties, revised its approach to the exclusion of circulators and,
consequently, this design feature is no longer needed in the
definitions of IL, ESCC, and ESFM. Instead, DOE has made other
modifications to the applicable definitions to continue to exclude
circulators from the equipment categories addressed in this rulemaking,
as discussed above.
In addition to the parameters necessary to exclude circulators from
the scope of pumps for which the test procedure is applicable, the CA
IOUs commented that certain multi-stage pumps should be included in the
definition of a circulator, as proposed by DOE. CA IOUs also provided
an example of a commercially available style of pump that they believe
to be a multi-stage circulator. (CA IOUs, No. 13 at pp. 4-5) DOE
reviewed the example style of pump provided by the CA IOUs and found
that this specific style of pump is available in sizes from 0.5 to 75
motor hp, depending on impeller diameter and number of stages. DOE also
concluded that specific models within this general pump family, namely
those with shaft horsepower greater than or equal to 1 hp, meet the
definition of an RSV pump and therefore are included in the scope of
this rulemaking. Conversely, other models within the same pump family
with shaft horsepower less than 1 hp do not meet the definition of an
RSV pump and are not subject to the test procedure established in this
rulemaking. Consequently, given that DOE has withdrawn its proposal to
define circulators at this time, DOE has determined that it does not
need to define or address these small RSV pumps in this rulemaking.
c. Pool Pumps
The CIP Working Group formally recommended that DOE initiate a
separate rulemaking for dedicated-purpose pool pumps (DPPPs) by
December 2014. (Docket No. EERE-2013-BT-NOC-0039, No. 92,
Recommendation #5A at p. 2) In the April 2015 pumps test procedure
NOPR, DOE proposed defining a ``dedicated-purpose pool pump'' as an end
suction pump designed specifically to circulate water in a pool and
that includes an integrated basket strainer. 80 FR 17586, 17641 (April
1, 2015). DOE developed this proposed definition to help distinguish a
DPPP from other categories of pumps under consideration in this
rulemaking (Docket No. EERE-2013-BT-TP-0055).
In response, APSP requested that DOE continue to keep pool pumps
separate from the scope of pumps considered in this rulemaking (APSP,
No. 12 at p.1), and the CA IOUs encouraged ASRAC to establish a new
working group for DPPP. (CA IOUs, No. 13 at pp. 1-2) In July 2015, DOE
issued a RFI on DPPPs requesting data and information from
[[Page 4099]]
interested parties on this equipment (July 2015 DPPP RFI). 80 FR 38032
(July 3, 2015). On August 25, 2015, DOE also published a notice of
intent to establish a working group for DPPPs. 80 FR 51483. See https://www1.eere.energy.gov/buildings/appliance_standards/rulemaking.aspx/ruleid/14 for more updates and information on the DPPP rulemaking.
DOE also received several comments regarding its proposed
definition. During the April 2015 NOPR public meeting, CA IOUs
expressed that the defining characteristic of a pool pump may not be
the strainer basket, as not all pool pumps have them. (CA IOUs, NOPR
public meeting transcript, No. 7 at pp. 57-58, 68) An HI representative
from Xylem (Mark Handzel) responded that commercial pool pumps without
basket strainers would be considered under one of the equipment
categories addressed in this rulemaking. (HI, NOPR public meeting
transcript, No. 7 at pp. 58-59) An HI representative from Xylem (Paul
Ruzicka) also suggested that, on the residential side, pool pumps are
double insulated products. (HI, NOPR public meeting transcript, No. 7
at pp. 69-70)
In written comments, the EEAs and the CA IOUs noted that many pool
pumps, including booster pumps, do not include an integrated basket
strainer, and that not all pool pumps are designed specifically to
circulate water (EEAs, No. 10 at p. 2; CA IOUs, No. 13 at p. 2-3). The
CA IOUs noted that 40 percent of California residential in-ground pools
have booster pumps that are operated 2.5 hours per day. The size is
typically \3/4\ nameplate horsepower with a service factor of 1.5. The
CA IOUs recommended that these be considered pool pumps and excluded
from this rulemaking, further noting that these manufacturers were not
involved in the CIP Working Group deliberations. The CA IOUs also
stated that mass market commodity pool pumps are unique because either
the pump is secured directly to the motor; or the pump and motor are
each factory secured to a common frame. (CA IOUs, No. 13 at pp. 2-4)
In separate written comments, APSP and the CA IOUs recommended the
following definition:
``A `pool pump' is a pump with the following characteristics:
An integral end suction pump and motor combination
specifically designed for pool and spa applications.
The impeller is attached to a motor (or motor and
controller) served by single-phase power five total horsepower or less.
The pump is secured directly to the motor, or the pump and
motor are factory secured to a common frame.'' (APSP, No. 12 at p. 1;
CA IOUs, No. 13 at p. 3-4)
DOE's original intent in proposing a definition for DPPP in the
April 2015 pumps test procedure NOPR was to properly exclude them from
this rulemaking. Upon review, DOE agrees with certain of the submitted
comments on the proposed definition, such as that all pumps associated
with pools may not include an integrated basket strainer. For example,
DOE is aware that booster pumps are not typically sold with integrated
basket strainers and some filter pumps may be sold separately from the
strainer, as discussed in the July 2015 DPPP RFI. 80 FR 26475, 26481
(May 8, 2015).
Therefore, after reviewing the comments submitted by interested
parties, DOE has decided to refrain from adopting a definition for DPPP
in this final rule. Instead, in this final rule, DOE is excluding DPPP
from the definitions for ESCC and ESFM pumps, and DOE will define DPPP
in the separate DPPP rulemaking that was initiated with the RFI.
d. Axial/Mixed Flow and Positive Displacement Pumps
``Axial/mixed flow pump'' is a term used by the pump industry to
describe a rotodynamic pump that is used to move large volumes of
liquid at high flow rates and low heads. These pumps are typically
custom-designed and used in applications such as dewatering, flood
control, and storm water management.
Positive displacement (PD) pumps are a style of pump that operates
by first opening an increasing volume to suction; this volume is then
filled, closed, moved to discharge, and displaced. PD pumps operate at
near-constant flow over their range of operational pressures and can
often produce higher pressure than a centrifugal pump, at a given flow
rate. PD pumps also excel at maintaining flow and efficiency for
liquids more viscous than water. When used in clean water applications,
PD pumps are typically chosen for high pressure, constant flow
applications such as high pressure power washing, oil field water
injection, and low-flow metering processes.
The CIP Working Group recommended excluding both of these types of
pumps from prospective energy conservation standards. (Docket No. EERE-
2013-BT-NOC-0039, No. 92, Recommendation #6 at p. 2) The primary reason
for excluding these pumps from this test procedure rulemaking is their
low market share in the considered horsepower range and low potential
for energy savings. (Docket No. EERE-2013-BT-NOC-0039, No. 14 at pp.
114 and 372-73) In addition, the CIP Working Group acknowledged that PD
pumps are more commonly used in non-clean water applications and
provide a different utility than the categories of pumps addressed in
this rulemaking. (Docket No. EERE-2013-BT-NOC-0039, No. 14 at p. 114)
Therefore, in the April 2015 pumps test procedure NOPR, DOE proposed to
exclude these pumps from the scope of this rulemaking and the parallel
energy conservation standards rulemaking, but determined that both
axial/mixed flow and PD pumps were implicitly excluded based on the
proposed equipment category definitions and scope parameters, so that
explicit exclusions were not necessary. 80 FR 17586, 17597-98 (April 1,
2015). In the April 2015 pumps test procedure NOPR, DOE requested
comment on the proposed exclusion and the assertion that such pumps
were explicitly excluded based on the existing definitions and scope
parameters. Id.
HI commented that both positive displacement and axial/mixed flow
pumps should be added to the list of equipment excluded from the scope
of pumps in this final rule. HI noted that PD pumps represent a small
percentage of the overall pump market and are generally used for niche
applications, such as viscous or shear-sensitive liquids. As a result,
such pumps have a distinct difference in design compared with
rotodynamic pumps. HI also suggested differentiating and excluding
axial/mixed flow pumps using a specific speed limit of 4,500,\23\ where
pumps with a specific speed greater than 4,500 would be considered
axial/mixed flow. (HI, No. 8 at p. 11)
---------------------------------------------------------------------------
\23\ Specific speed is a quasi-dimensionless quantity used to
describe relative pump geometry and flow characteristics.
---------------------------------------------------------------------------
In response to HI, DOE notes that the April 2015 pumps test
procedure NOPR does not include PD pumps within its scope of
applicability. All equipment to which the April 2015 pumps test
procedure NOPR and this final rule applies is explicitly defined as
types of rotodynamic pumps. Further, rotodynamic pumps are explicitly
defined in the April 2015 pumps test procedure NOPR and this final rule
as continuously imparting energy to the pumped fluid by means of a
rotating impeller, propeller, or rotor. Such definition necessarily
does not include
[[Page 4100]]
PD pumps, which do not continuously impart energy to the pumped fluid
and do not contain an impeller, propeller, or rotor. As such, no PD
pumps meet the definition of any equipment within the scope of this
test procedure, as discussed in section III.A.2.a. Therefore, DOE does
not believe it is necessary to explicitly exclude PD pumps, which is
consistent with the comments submitted by HI.
Regarding axial/mixed flow pumps, DOE agrees with HI that axial/
mixed flow pumps, which are designed to accommodate high flow-to-head-
ratio applications, should not be subject to the test procedure
established in this final rule. DOE notes that the definitions of IL,
RSV, and VTS implicitly exclude axial/mixed flow pumps through specific
design features. Specifically, the definitions of IL and RSV pumps
exclude axial/mixed flow pumps by specifying single axis flow and a
liquid inlet in a plane perpendicular to the impeller shaft. In
contrast, the liquid intake in axial/mixed flow pumps is typically
parallel to the impeller shaft; as such, these pumps do not meet the
definition of an RSV or IL pump. DOE understands that less typical
piping configurations could allow an axial/mixed flow pump to be built
with the liquid inlet in a plane perpendicular to the impeller shaft.
However, such a configuration would not satisfy the definition of
single axis flow and, as such, these pumps would not meet the
definition of an RSV or IL pump. Additionally, the definition of VTS
pump excludes axial/mixed flow pumps by specifying that the pump must
be designed to operate with the motor and stage(s) fully submerged in
the pumped liquid. Axial/mixed flow pumps are not designed to be
completely submerged in the pumped liquid and, therefore do not meet
the definition of a VTS pump.
In summary, DOE believes that the definitions of IL, RSV, and VTS
equipment categories are sufficient to exclude pumps that are referred
to as axial/mixed flow. As a result, DOE maintains that a specific
speed limitation or other criteria for these categories is unnecessary,
and DOE has not included a specific speed range for these pumps in the
parameters for establishing the scope of this rulemaking described in
section III.A.4.
With respect to the end suction pumps defined in this final rule,
DOE agrees that additional scope parameters are necessary to limit the
scope of this rulemaking to end suction pumps and not inadvertently
include axial/mixed flow pumps. DOE agrees with HI's suggestion of a
specific speed limit to accomplish the exclusion of axial/mixed flow
pumps. However, DOE reviewed the specific speeds of all end suction
pumps submitted by manufacturers during the energy conservation
standards rulemaking and identified multiple end suction pumps with
specific speeds in the range of 4,500 to 5,000.\24\ DOE notes these
data were voluntarily submitted by manufacturers who self-classified
their pumps into equipment types with the understanding that the
rulemaking was not intended to include axial/mixed flow pumps. DOE
reviewed literature for the specific pumps end suction pumps with
specific speeds in the range of 4,500 to 5,000 and found them to be
marketed as end suction pumps. Furthermore, DOE notes that the
performance data for these pumps were included in the energy
conservation standards rulemaking analysis. Consequently, DOE finds it
appropriate to explicitly include within the scope of this rule, as
established in Sec. 431.464(a)(1)(ii), all end suction pumps with
specific speeds up to and including 5,000 and exclude pumps with
specific speeds greater than 5,000.
---------------------------------------------------------------------------
\24\ All values for specific speed in this final rule pertain to
calculations using U.S. customary units.
---------------------------------------------------------------------------
e. Final Equipment Category Definitions
After consideration of all comments, definitions for pump equipment
categories subject to this test procedure are as set forth in the
regulatory text of this rule (10 CFR 431.62).
DOE received no comments on DOE's other supporting definitions
proposed in the April 2015 pumps test procedure NOPR, namely
rotodynamic pump, single axis flow pump, and end suction pump.
Therefore, DOE is adopting those definitions as proposed.
3. Scope Exclusions Based on Application
In an effort to meet the intent and recommendations of the CIP
Working Group to include only those pumps intended to pump clean water
in the scope of this test procedure rulemaking (Docket No. EERE-2013-
BT-NOC-0039, No. 92, Recommendation #8 at pp. 3-4), DOE proposed to
define ``clean water pump'' in the April 2015 pumps test procedure
NOPR. 80 FR 17586, 17598 (April 1, 2015). DOE also proposed defining
several kinds of clean water pumps that are designed for specific
applications and that the CIP Working Group had indicated should be
excluded from the scope of this test procedure and DOE's standards
rulemaking efforts that are being considered in a separate rulemaking.
(Docket No. EERE-2011-BT-STD-0031) These proposed definitions, comments
DOE received regarding the proposed definitions, and DOE's responses to
those comments are discussed in the subsequent sections III.A.3.a and
III.A.3.b.
a. Definition of Clean Water Pump
In the NOPR, DOE proposed defining ``clean water pump'' as a pump
that is designed for use in pumping water with a maximum non-absorbent
free solid content of 0.25 kilograms per cubic meter, and with a
maximum dissolved solid content of 50 kilograms per cubic meter,
provided that the total gas content of the water does not exceed the
saturation volume, and disregarding any additives necessary to prevent
the water from freezing at a minimum of -10 [deg]C. DOE also noted that
several common pumps would not meet the definition of clean water
pumps, as they are not designed for pumping clean water, including
wastewater, sump, slurry, or solids handling pumps; pumps designed for
pumping hydrocarbon product fluids; chemical process pumps; and
sanitary pumps. DOE also proposed to incorporate by reference the
definition for ``clear water'' established in HI 40.6-2014 to describe
the characteristics of the fluid to be used when testing pumps in
accordance with the DOE test procedure. 80 FR 17586, 17598 (April 1,
2015).
DOE requested comment on the definition of ``clean water pump''
proposed in the April 2015 pumps test procedure NOPR and its proposal
to incorporate by reference the definition of ``clear water'' in HI
40.6-2014 to describe the testing fluid to be used when testing pumps
in accordance with the DOE test procedure. In response to these
proposals, HI commented that it agrees with the definition of ``clean
water pump'' as set forth in the NOPR, and that it agrees with
incorporating by reference the definition of ``clear water'' in HI
40.6-2014. (HI, No. 8 at p. 11) DOE received no other comments on these
terms and has determined that the definitions proposed in the NOPR are
sufficient for the purposes of applying DOE's test procedure. However,
for consistency, DOE is making the minor modification of translating
the definition to use all U.S. customary units. As such, DOE is
adopting the definition of clean water pump and incorporating by
reference the definition of ``clear water'' in HI 40.6-2014 as proposed
in the April 2015 pumps test procedure NOPR, with only the minor
modification regarding units noted previously.
[[Page 4101]]
b. Exclusion of Specific Kinds of Clean Water Pumps
In the April 2015 pumps test procedure NOPR, DOE also proposed
defining several kinds of pumps that meet the definition of clean water
pumps discussed in section III.A.3.a, but that the CIP Working Group
recommended be excluded from this pumps test procedure rulemaking.
Specifically, in the April 2015 pump test procedure NOPR, DOE proposed
that the test procedure would not apply to the following:
Fire pumps;
self-priming pumps;
prime-assist pumps;
sealless pumps;
pumps designed to be used in a nuclear facility subject to
10 CFR part 50--Domestic Licensing of Production and Utilization
Facilities; and
a pump meeting the design and construction requirements
set forth in Military Specification MIL-P-17639F, ``Pumps, Centrifugal,
Miscellaneous Service, Naval Shipboard Use'' (as amended).
80 FR 17586, 17598-17600 (April 1, 2015).
Accordingly, DOE proposed the following definitions of fire pump,
self-priming pump, prime-assist pump, and sealless pump:
Fire pump means a pump that is compliant with National
Fire Protection Association (NFPA) 20-2016,\25\ ``Standard for the
Installation of Stationary Pumps for Fire Protection,'' and either (1)
American National Standards Institute (ANSI)/UL listed under ANSI/UL
448-2013, ``Standard for Safety Centrifugal Stationary Pumps for Fire-
Protection Service,'' or (2) FM approved under the January 2015 edition
\26\ of FM Class Number 1319, ``Approval Standard for Centrifugal Fire
Pumps (Horizontal, End Suction Type).''
---------------------------------------------------------------------------
\25\ DOE notes that in the April 2015 pumps test procedure NOPR,
DOE proposed to reference NFPA 20-2013. However, on May 26, 2015,
NFPA released a revised version of NFPA 20. DOE reviewed the new
NFPA 20-2016 and finds it to be consistent with NFPA 20-2013 for the
purposes of defining the characteristics of a ``fire pump'' in the
context of DOE's regulations for pumps. DOE finds it most
appropriate to reference the most up-to-date version of the NFPA
Standard, as that version would be the version currently in use for
specifying the necessary characteristics of fire pumps in the
industry. Therefore, in this final rule, DOE is updating the
definition of fire pump to reference NFPA 20-2016.
\26\ Similar to NFPA 20-2016, DOE notes that, in January 2015,
FM Global released an updated version of the FM Class Number 1319
standard. DOE reviewed the new January 2015 edition and notes that
it contains only editorial changes as compared to the October 2008
edition proposed in the NOPR. DOE believes that it is most
appropriate to reference the most up-to-date version of the FM
standard, as that version is the version currently in use for
specifying the necessary characteristics of fire pumps in the
industry. Therefore, in this final rule, DOE is updating the
definition of fire pump to reference the January 2015 edition of FM
Class Number 1319.
---------------------------------------------------------------------------
Self-priming pump means a pump designed to lift liquid
that originates below the center line of the pump impeller. Such a pump
requires initial manual priming from a dry start condition, but
requires no subsequent manual re-priming.
Prime-assist pump means a pump designed to lift liquid
that originates below the center line of the pump impeller. Such a pump
requires no manual intervention to prime or re-prime from a dry-start
condition. Such a pump includes a vacuum pump or air compressor to
remove air from the suction line to automatically perform the prime or
re-prime function.
Sealless pump means either:
[cir] A pump that transmits torque from the motor to the bare pump
using a magnetic coupling; or
[cir] A pump in which the motor shaft also serves as the impeller
shaft for the bare pump, and the motor rotor is immersed in the pumped
fluid.
Id. at 17641-42.
HI commented that it agrees with the definition of ``fire pump''
and recommended alternate definitions for ``self-priming pump,''
``prime-assist pump,'' and ``sealless pump'' as follows:
Self-priming pump means a pump designed to lift liquid
that originates below the centerline of the pump inlet. Further, such a
pump must contain at least one internal recirculation passage and
requires a manual filling of the pump casing prior to initial start-up.
Such a pump must then be able to re-prime after the initial start-up
without the use of external vacuum sources, manual filling, or a foot
valve.
Prime-assist pump means a pump designed to lift liquid
that originates below the centerline of the pump inlet. Such a pump
requires no manual intervention to prime or re-prime from a dry-start
condition without the use of a foot valve. Such a pump includes a
vacuum pump or air compressor and venture/educator to remove air from
the suction line to automatically perform the prime or re-prime
function at any point during the pump's operating cycle.
A sealless pump means either:
[cir] A hermetically sealed pump that transmits torque from the
motor to an inner impeller rotor via magnetic force through a
containment shell;
[cir] Or, a type of pump that has a common shaft to link the pump
and motor in a single hermetically sealed unit. The pumped liquid is
circulated through the motor but is isolated from the motor components
by a stator liner.
(HI, No. 55 at pp. 11-12)
DOE considered these recommendations and revised the definitions of
these excluded clean water pumps in this final rule, incorporating the
key components of HI's proposals. Specifically, DOE agrees with HI's
revised definitions for prime-assist pump and self-priming pump and is
adopting them in this final rule with some minor modifications for
clarity. DOE finds HI's suggested definitions to be consistent with
DOE's proposed definitions but more precise, using industry-specific
language.
Regarding HI's suggested definition of sealless pump, DOE agrees
with the content of the definition. However, DOE notes that, based on
the modifications to equipment category definitions described in
section III.A.2.a, DOE has determined that it is no longer necessary to
explicitly exclude wet rotor pumps (the second clause of HI's sealless
pump definition) from the scope of this rulemaking. Specifically, as
explained in section III.A.2.a, DOE is specifying in its revised
definitions that all ESCC, ESFM, IL, RSV, and VTS pumps are types of
dry rotor pumps. Dry rotor pump means a pump in which the motor rotor
is not immersed in the pumped fluid. Conversely, a wet rotor pump is
one in which the motor rotor is immersed in the pumped liquid.
Given the mutually exclusive relationship between wet and dry rotor
pumps, the definitions of ESCC, ESFM, IL, RSV, and VTS pumps, as
established in section III.A.2.a, now implicitly exclude wet rotor
pumps from the scope of this test procedure. As a result, DOE has
simplified the sealless pump exclusion in this final rule to exclude
magnet driven pumps only. Accordingly, DOE is also modifying the term
``sealless pump'' to ``magnet driven pump,'' as DOE believes this term
more accurately describes the excluded equipment. In addition, DOE is
modifying the definition of magnet driven pump to be consistent with
the suggestions from HI, which DOE believes is consistent with the
portion of the sealless pump definition proposed in the April 2015
pumps test procedure NOPR addressing magnet driven pumps, but which
uses more precise and industry-specific terminology.
HI also commented that no pumps designed to the Federal defense
specification MIL-P-17639 should be included in this rulemaking. (HI,
No. 8 at p. 12) HI stated that the specifications included in the CIP
Working Group
[[Page 4102]]
term sheet also should be excluded, specifically MIL-P-17881, MIL-P-
17840, MIL-P-18682, and MIL-P-18472 (commonly referred to as ``MIL-
SPEC''). DOE has therefore reviewed these additional specifications in
determining exclusions in this final rule.
Pumps designed to these military specifications must meet very
specific physical and/or operational characteristics and comply with
complex and rigid reporting requirements.\27\ These specifications
require that significant amounts of design and test data be submitted
to various military design review agencies to ensure that the pump can
be operated and maintained in harsh naval environments. DOE believes
there is sufficient justification to exclude all of the MIL-SPEC pumps
identified by HI from the scope of this rulemaking without a risk of
clean water pumps being marketed or sold as MIL-SPEC for actual use in
other applications due to the rigorous and burdensome requirements
associated with complying with those regulations. DOE notes that, as
mentioned in the April 2015 pumps test procedure NOPR, when considering
if a pump is designed and constructed to the requirements set forth in
any of these specifications, DOE may request that a manufacturer
provide DOE with copies of the original design and test data that were
submitted to appropriate design review agencies, as required by each of
these specifications. 80 FR 17586, 17599 (April 1, 2015).
---------------------------------------------------------------------------
\27\ United States General Accounting Office, Report to
Congressional Committees, Acquisition Reform: DOD Begins Program To
Reform Specifications and Standards, GAO/NSIAD-95-14. October 11,
1994. Washington, DC. pp. 2-3. http://www.gao.gov/archive/1995/ns95014.pdf.
---------------------------------------------------------------------------
After reviewing and considering comments, DOE is adopting in this
final rule that the following specific types of clean water pumps are
excluded from the scope of this test procedure final rule:
Fire pumps;
self-priming pumps;
prime-assist pumps;
magnet driven pumps;
pumps designed to be used in a nuclear facility subject to
10 CFR part 50--Domestic Licensing of Production and Utilization
Facilities; and
pumps meeting the design and construction requirements set
forth in Military Specification MIL-P-17639F, ``Pumps, Centrifugal,
Miscellaneous Service, Naval Shipboard Use'' (as amended); MIL-P-
17881D, ``Pumps, Centrifugal, Boiler Feed, (Multi-Stage)'' (as
amended); MIL-P-17840C, ``Pumps, Centrifugal, Close-Coupled, Navy
Standard (For Surface Ship Application)'' (as amended); MIL-P-18682D,
``Pump, Centrifugal, Main Condenser Circulating, Naval Shipboard'' (as
amended); and MIL-P-18472G, ``Pumps, Centrifugal, Condensate, Feed
Booster, Waste Heat Boiler, And Distilling Plant'' (as amended).
Accordingly, DOE provides the revised definitions of fire pump,
self-priming pump, prime-assist pump, and magnet driven pump set forth
in the regulatory text of this rule (10 CFR 431.62).
4. Parameters for Establishing the Scope of Pumps in This Rulemaking
In addition to limiting the types of pumps that DOE will regulate
at this time through pump definitions and their applications, DOE
proposed in the April 2015 pumps test procedure NOPR to further limit
the scope of the pumps test procedure considered in this rulemaking by
applying the following performance and design characteristics:
1-200 hp (shaft power at the BEP at full impeller diameter
for the number of stages \28\ required for testing to the standard);
\29\
---------------------------------------------------------------------------
\28\ The number of ``stages'' in a multi-stage pump refers to
the number of bowl assemblies included in that pump.
\29\ The CIP Working Group also recommended that testing be
required with three stages for RSV pumps and nine stages for VTS
pumps, unless a model is not available with that specific number of
stages, in which case the pump would be tested with the next closest
number of stages. This recommendation is discussed in more detail in
section III.C.2.c.
---------------------------------------------------------------------------
25 gallons per minute (gpm) and greater (at BEP at full
impeller diameter);
459 feet of head maximum (at BEP at full impeller
diameter);
design temperature range from -10 to 120 [deg]C;
pumps designed for nominal 3,600 or 1,800 revolutions per
minute (rpm) driver speeds; and
6-inch or smaller bowl diameter for VTS pumps (HI VS0).
(Docket No. EERE-2013-BT-NOC-0039, No. 92, Recommendation #7 at p. 3);
80 FR 17586, 17600 (April 1, 2015).
Wilo commented that lower thresholds for horsepower and BEP flow
rate should not be included as limiting parameters on the scope of
pumps considered in the rule, citing unspecified gains in energy
savings that could be realized by regulating smaller models. (Wilo,
Docket No. EERE-2011-BT-STD-0031, No. 44 at pp. 1-2) \30\ In response
to Wilo's suggestion that DOE apply the test procedure to pumps with
flow rates below 25 gpm or shaft input power below 1 hp, DOE believes
that such a recommendation is inconsistent with the scope of pumps the
CIP Working Group recommended for this rulemaking. Given that such
small horsepower pumps were not considered in the CIP Working Group
discussions, any data or information submitted to DOE throughout those
negotiations did not consider small horsepower pumps. As such, DOE is
electing to maintain the lower thresholds for horsepower and BEP flow
rate as proposed in the April 2015 pumps test procedure NOPR.
---------------------------------------------------------------------------
\30\ A notation in this form provides a reference for
information that is in the docket of DOE's rulemaking to develop
energy conservation standards for commercial and industrial pumps
(Docket No. EERE-2011-BT-STD-0031, which is maintained at
www.regulations.gov). This particular notation refers to a comment:
(1) Submitted by Wilo; (2) appearing in document number 44 of the
docket; and (3) appearing on pages 1-2 of that document.
---------------------------------------------------------------------------
HI recommended in the April 2015 NOPR public meeting and written
comments that DOE establish scope related to ``driver and impeller''
speed rather than just driver speed. HI noted that pumps do not all
have 1:1 motor rotating speed to impeller-rotating speed, such as a
gear pump. (HI, NOPR public meeting transcript, No. 7 at p. 85; HI, No.
8 at p. 13) HI further specified as an example that a geared pump
designed to use a 2-pole motor could be in scope but could not be
tested according to section I.C.1 of the test procedure. (HI, No. 8 at
p. 13)
DOE notes that the list shown in the preamble of the April 2015
pump test procedure NOPR, based on the CIP Working Group
recommendations, included a limitation for pumps designed for nominal
driver speeds of 3,600 or 1,800 revolutions per minute (rpm) driver.
(Docket No. EERE-2013-BT-NOC-0039, No. 92, Recommendation #7 at p. 3);
80 FR 17586, 17600 (April 1, 2015). However, in the regulatory text of
the April 2015 pumps test procedure NOPR, DOE modified this
recommendation to acknowledge that the pumps within the scope of the
proposed test procedure include pumps paired with non-induction motors,
which have wide range of operating speeds. Specifically, DOE proposed
to limit the scope of the proposed test procedure to pumps designed to
operate with either: (1) A 2- or 4-pole induction motor, or (2) a non-
induction motor with a speed of rotation operating range that includes
speeds of rotation between 2,880 and 4,320 rpm and/or 1,440 and 2,160
rpm. Id. at 17642. DOE proposed the speed ranges of 2,880 to 4,320 and
1,440 to 2,160 based on the nominal rotating speeds of 3,600 and 1,800
for 2- and 4-pole motors, respectively, and the allowed 20
[[Page 4103]]
percent tolerance on rotating speed proposed in the NOPR. Id. at 17609.
DOE notes that geared pumps were never explicitly addressed by the
CIP Working Group; were not included in the pump data which are the
basis of this final rule and the associated energy conservation
standard rulemaking; and were not intended to be included in the scope
of the April 2015 pumps test procedure NOPR. In addition, as mentioned
in section III.A.2.a, geared pumps typically operate at impeller speeds
higher than the 1,800 and 3,600 nominal rotating speeds DOE referenced
in CIP Working Group discussions and the April 2015 pumps test
procedure NOPR. In light of HI's comment, DOE agrees that it is worth
clarifying that such pumps are not subject to or addressed by the test
procedure established in this final rule. To clarify that pumps with
higher impeller or lower driver rotating speeds (i.e., geared pumps)
are not within the scope of this rulemaking, DOE is modifying the
language establishing the rotating speeds within the scope of the test
procedure adopted in this final rule to note that the driver and
impeller must operate at the same speed.
During the April 2015 NOPR public meeting, the CA IOUs expressed
concern regarding whether it was the CIP Working Group's intention to
address VTS pumps that operate at high speed. Specifically, the CA IOUs
mentioned that it may not have been the intent of HI to exclude a
product operating at a higher rpm and recommended that HI consider the
language proposed in the April 2015 pumps test procedure NOPR to ensure
they support the scope of pumps addressed by the proposed test
procedure. (CA IOUs, NOPR public meeting transcript, No. 7 at pp. 86-
88) However, in its written comments, HI did not recommend any changes
to the parameters other than the discussion on impeller speed versus
driver speed. (HI, No. 8 at p. 13)
Wilo commented that manufacturers may redesign to nominal speeds
excluded from the DOE regulation. (Wilo, Docket No. EERE-2011-BT-STD-
0031, No. 44 at p. 2) Wilo indicated that, for example, a pump could be
designed for use with 6-pole motors at 1,200 rpm, or for use with
controls at 2,650 rpm. Wilo recommended to instead apply the minimum
efficiency required per equipment class (e.g., C-values at 1,800 rpm)
to pumps of any speed and specific speed, thereby eliminating
exceptions for speed and allowing for enforcement across all motor
speeds. (Id.)
DOE's data and analysis are based solely on pumps with nominal
rotating speeds corresponding to those speed ranges proposed in the
2015 pumps test procedure NOPR. DOE notes that, during the initial data
request underlying the parallel pumps test procedure and energy
conservation standards rulemakings, DOE requested data on six-pole
pumps from manufacturers. However, manufacturers declined to provide
such on the basis that, while some pumps may be sold for use with 6-
pole motors, they are all designed for use with 4- or 2-pole motors.
(Docket No. EERE-2013-BT-NOC-0039, No. 46 at p. 198) As such,
manufacturers posited that these pumps would already be captured in the
provided data for 4- and 2-pole, and any efficiency improvements made
to meet the energy conservation standards for those equipment classes
would also result in energy savings when the pump was operated with a
6-pole motor. Additionally, DOE finds it unlikely that, for those pumps
that can operate with 2-, 4-, or 6-pole motors, a manufacturer would
begin specifying that their pump was inappropriate for operation in the
nominal speed ranges of 2,880 and 4,320 rpm and/or 1,440 and 2,160 rpm
to avoid regulation.
After considering these comments, DOE maintains its position set
forth in the NOPR, and limits the test procedure applicability to pumps
designed for the given motors or speeds. DOE notes that pumps with
lower or higher operating speeds are covered as ``pumps'' and, should
DOE deem it necessary, DOE could evaluate the need for a test procedure
or standards for pumps at other rotating speeds in a future rulemaking.
In summary, DOE is establishing in this final rule the following
scope parameters:
25 gpm and greater (at BEP at full impeller diameter);
459 feet of head maximum (at BEP at full impeller diameter
and the number of stages specified for testing);
design temperature range from 14 to 248 [deg]F;
designed to operate with either (1) a 2- or 4-pole
induction motor, or (2) a non-induction motor with a speed of rotation
operating range that includes speeds of rotation between 2,880 and
4,320 rpm and/or 1,440 and 2,160 rpm, and in either case, the driver
and impeller must rotate at the same speed; and
6-inch or smaller bowl diameter for VTS pumps (HI VS0).
As discussed further in section III.B.2, DOE is clarifying that the
limitation on pump total head of 459 feet must be ascertained based on
the pump operating at BEP, at full impeller diameter, and with the
number of stages specified for testing.
Additionally, to exclude axial/mixed flow pumps, DOE is applying a
seventh scope parameter for ESCC and ESFM pumps, namely:
For ESCC and ESFM pumps, specific speed less than or equal
to 5,000 when calculated using U.S. customary units in accordance with
the DOE test procedure.
As discussed in section III.A.2.d, DOE is setting this limit on
specific speed based on HI's suggestion and data submitted by
manufacturers for end suction pumps. DOE believes that a specific speed
limit for the remaining equipment categories, namely IL, RSV, and VTS,
are unnecessary, as the definitions for these categories include design
features that implicitly exclude axial/mixed flow pumps.
In the April 2015 pumps test procedure NOPR, DOE proposed defining
bowl diameter to specify clearly and unambiguously the limiting
criterion for VTS pumps (i.e., bowl diameter). 80 FR 17586, 17600
(April 1, 2015). Specifically, DOE proposed defining ``bowl diameter''
as it applies to VTS pumps as follows:
Bowl diameter means the maximum dimension of an imaginary straight
line passing through and in the plane of the circular shape of the
intermediate bowl or chamber of the bare pump that is perpendicular to
the pump shaft and that intersects the circular shape of the
intermediate bowl or chamber of the bare pump at both of its ends,
where the intermediate bowl or chamber is as defined in ANSI/HI 2.1-
2.2-2008.
With this definition, only those VTS pumps with bowl diameters of 6
inches or less would be required to be tested under the test procedure.
Id.
In response to DOE's request for comment on the proposed definition
for ``bowl diameter'' as it would apply to VTS pumps, HI commented that
the definition should reference the updated 2014 version of ANSI/HI
2.1-2.2-2008, and recommended that the word ``outermost'' should be
inserted before the text ``circular shape of the intermediate bowl.''
(HI, No. 8 at p. 13) Based on previously submitted HI comments
regarding the energy conservation standards rulemaking for pumps, DOE
understands that VTS (e.g., VS0) pumps are considered equivalent to a
style of pump referred to as ``submersible multi-stage water pump''
[[Page 4104]]
(MSS) in EU regulation 547.\31\ (HI, Docket No. EERE-2011-BT-STD-0031,
No. 25 at p. 3) DOE also understands that, according to EU 547, MSS
pumps are designed to be operated in a borehole and have a nominal
outer diameter of either 4 or 6 inches.
---------------------------------------------------------------------------
\31\ Council of the European Union. 2012. Commission Regulation
(EU) No 547/2012 of 25 June 2012 implementing Directive 2009/125/EC
of the European Parliament and of the Council with regard to
ecodesign requirements for water pumps. Official Journal of the
European Union. L 165, 26 June 2012.
---------------------------------------------------------------------------
DOE agrees with HI that including the word ``outermost'' in the
proposed bowl diameter definition would improve the clarity of the
critical dimension and ensure the definition is aligned with how the
pumps are treated in EU 547. Therefore, in this final rule, DOE is
including the term outer diameter before the text ``circular shape of
the intermediate bowl'' in the definition of ``bowl diameter'' proposed
in the April 2015 pumps test procedure NOPR. DOE has also determined
that in order to avoid confusion with the ANSI/HI 2.1-2.2-2014 term
``seal chamber,'' the text ``or chamber'' should be removed from the
bowl diameter definition. The revised definition reads as set forth in
the regulatory text of this rule (10 CFR 431.62).
5. Drivers Other Than Electric Motors
DOE recognizes that some pumps, particularly in the agricultural
sector, may be sold and operated with drivers other than electric
motors (i.e., non-electric drivers), such as engines, steam turbines,
or generators. In the April 2015 pump test procedure NOPR, in
accordance with the recommendations of the CIP Working Group (Docket
No. EERE-2013-BT-NOC-0039, No. 92, Recommendation #3 at p. 2), DOE
proposed that pumps sold with non-electric drivers be rated as bare
pumps only. Specifically, based on DOE's proposed test procedure for
bare pumps discussed in detail in section III.E.1.a, pumps sold with
non-electric drivers would determine the PEICL for the pump
based on the calculated performance of the bare pump combined with a
default motor that is minimally compliant with DOE's energy
conservation standards for electric motors \32\ listed at 10 CFR
431.25. 80 FR 17586, 17600 (April 1, 2015). DOE noted that by requiring
testing and certification in this manner, any hydraulic improvements
made to the bare pump to comply with any applicable energy conservation
standards that may apply to the bare pump would also result in energy
savings when the pump was used with a non-electric driver. Id.
---------------------------------------------------------------------------
\32\ In context, the terms ``electric motor'' and ``motor'' are
used interchangeably.
---------------------------------------------------------------------------
DOE requested comment on its proposal to test pumps sold with non-
electric drivers as bare pumps. HI commented that it agrees that pumps
sold with non-electric drivers should be tested as bare pumps, as
recommended by the CIP Working Group. (HI, No. 8 at p. 13) DOE received
no other comments on the proposal and is adopting provisions for
testing pumps paired with non-electric drivers as bare pumps in this
final rule, as proposed in the April 2015 pumps test procedure NOPR.
6. Pumps Sold With Single-Phase Induction Motors
In the April 2015 pumps test procedure NOPR, DOE acknowledged that
some pumps within the scope of this rulemaking may be distributed in
commerce with single-phase motors. However, DOE determined that the
majority of pumps in the scope of this test procedure rulemaking are
sold with polyphase induction motors. Moreover, DOE noted that, to the
extent that pumps within the scope of the proposed test procedure are
distributed in commerce with single-phase motors, most of these pumps
are offered for sale with either single-phase or polyphase induction
motors of similar size, depending on the power requirements of
customers.
Given that single-phase induction motors are, in general, less
efficient than polyphase induction motors and, thus, will result in
different energy consumption characteristics when paired with the same
bare pump, DOE proposed that pumps sold with single-phase induction
motors be tested and rated in the bare pump configuration, using the
calculation-based method (see section III.E.1.a for a more detailed
description of this method). DOE believed that such an approach would
more equitably rate pumps sold with single-phase motors and prevent
pumps sold with single-phase motors from being penalized by the reduced
energy efficiency of the paired single-phase motor, as compared to
similarly-sized polyphase motors. 80 FR 17586, 17600-01 (April 1,
2015).
In response to DOE's proposed method for testing pumps sold with
single-phase induction motors, HI agreed that it is appropriate to
apply the calculation-based test procedure to bare pumps to determine
the PEICL for such pumps. However, HI also requested the
option of using single-phase motor wire-to-water test data (that is,
applying the testing-based method for pumps sold with motors, discussed
in section III.E.2.b) to determine the PEICL for such pumps.
(HI, No. 8 at p. 13) Given that single-phase induction motors are, in
general, less efficient than polyphase induction motors, determining
the PEICL for pumps sold with single-phase induction motors
based on the testing-based method for pumps sold with motors will
generally result in PEICL ratings that are equivalent to or
lower than those determined by rating the pump as a bare pump (as
proposed in the April 2015 pumps test procedure NOPR). Therefore, use
of the testing-based method will make it harder, rather than easier,
for pumps sold with single-phase induction motors, to meet the
established standards. For these reasons, DOE sees no reason why
manufactures could not be allowed to employ the testing-based method
for pumps sold with motors to determine the PEICL if they
chose to. As such, DOE is adopting provisions in this final rule that
allow manufacturers the option of rating pumps sold with single-phase
motors as bare pumps (using a calculation-based method) or as pumps
with motors using the testing-based methods. DOE notes that if
manufacturers choose to employ the testing-based methods for pumps sold
with motors, the denominator must still be calculated based on the
default motor efficiency values for polyphase NEMA Design B motor, as
discussed in section III.B.2. DOE also notes that, as for all pumps
subject to this test procedure final rule, manufacturers must report
which test method was employed in determining the certified
PEICL rating for the given basic model in the certification
report submitted to DOE. These requirements are discussed in more
detail in the pumps energy conservation standards rulemaking. (Docket
No. EERE-2011-BT-STD-0031)
B. Rating Metric: Constant and Variable Load Pump Energy Index
After significant discussion in the CIP Working Group open meeting,
the Working Group recommended that DOE use a wire-to-water, power-based
metric for all pumps, regardless of how they are sold. (Docket No.
EERE-2013-BT-NOC-0039, No. 92, Recommendation #11 at p. 5)
Specifically, the CIP Working Group recommended that DOE use the PEI
metric to measure pump energy performance, which is calculated as a
ratio of the PER (PERCL or PERVL) of the tested
pump divided by the PERCL of a pump that would minimally
comply with any DOE energy conservation standard for that pump type
(PERSTD). In both cases, PER represents a pump's power
consumption at a weighted average of
[[Page 4105]]
three or four load points. The CIP Working Group recommended a similar
metric for all pump configurations (i.e., bare pumps, pumps sold with a
motor, and pumps sold with a motor and continuous or non-continuous
controls) to allow for better comparability and more consistent
application of the rating metric for all pumps within the recommended
scope. This way, the benefit of speed control, as compared to a similar
pump without speed control, can be reflected in the measurement of
energy use or energy efficiency.
Accordingly, in the April 2015 pumps test procedure NOPR, DOE
proposed to establish a test procedure to determine the
PEICL for pumps sold without continuous or non-continuous
controls and PEIVL for pumps sold with continuous or non-
continuous controls. 80 FR 17586, 17601-02 (April 1, 2015). As
recommended by the CIP Working Group, DOE proposed to determine the
PEICL or PEIVL as the ratio of a PERCL
or PERVL scaled with respect to a ``standard pump energy
rating'' (PERSTD) that represents the performance of a bare
pump of the same equipment class that serves the same hydraulic load,
has the same flow and specific speed characteristics, and is minimally
compliant with DOE's energy conservation standards. Id.
Specifically, for pumps sold without continuous or non-continuous
controls, DOE proposed using the PEICL metric, which would
be evaluated as shown in equation (1):
[GRAPHIC] [TIFF OMITTED] TR25JA16.000
Where:
PERCL = the weighted average input power to the motor at
load points of 75, 100, and 110 percent of BEP flow (hp) and
PERSTD = the PERCL for a pump of the same
equipment class with the same flow and specific speed
characteristics that is minimally compliant with DOE's energy
conservation standards serving the same hydraulic load (hp). A more
detailed discussion of the PERSTD value is provided in
section III.B.2.
Similarly, for pumps sold with a motor and continuous or non-
continuous controls, DOE proposed to use PEIVL, which would
be evaluated as shown in equation (2):
[GRAPHIC] [TIFF OMITTED] TR25JA16.001
Where:
PERVL = the average input power to the motor and
continuous or non-continuous controls at load points of 25, 50, 75,
and 100 percent of BEP flow (hp) and
PERSTD = the PERCL for a pump of the same
equipment class with the same flow and specific speed
characteristics that is minimally compliant with DOE's energy
conservation standards serving the same hydraulic load (hp).
DOE noted in the April 2015 pumps test procedure NOPR that, under
the proposed approach, the performance of bare pumps or pumps paired
with motors (but without continuous or non-continuous controls) would
be determined for the appropriate load points along the single-speed
pump curve by increasing head (i.e., throttling) as flow is decreased
from the maximum flow rate of the pump, while pumps sold with
continuous or non-continuous controls, by contrast, would follow a
system curve and achieve the desired flow points by reducing the pump's
speed of rotation rather than controlling flow by throttling. By
reducing speed, power is reduced in proportion to the cube of speed,
resulting in lower power requirements for any part load flow points. As
such, the PEIVL for a pump sold with continuous or non-
continuous controls would be lower than the PEICL for the
same pump sold without continuous or non-continuous controls. In
essence, consistent with the recommendation of the CIP Working Group,
adopting the PEICL and PEIVL metrics as proposed
would illustrate the inherent performance differences that can occur
when coupling a given pump with continuous or non-continuous controls.
Id.
1. Determination of the Pump Energy Rating
As mentioned above, PERCL and PERVL represent
the weighted average input power to the pump determined at three or
four discrete load points for PERCL or PERVL,
respectively. In order to determine the representative performance of a
given pump unit, DOE must define a load profile and establish specific
load points at which to test a given pump for pumps sold with speed
controls and pumps sold without such speed controls (i.e., pumps sold
as bare pumps and pumps sold with motors). Based on DOE's research and
recommendations provided by the CIP Working Group, DOE proposed
adopting two distinct load profiles to represent constant speed and
variable speed pump operation, as shown in Table III.2.
Table III.2--Load Profiles Based on Pump Configuration
------------------------------------------------------------------------
Pump configuration Load profile Load points
------------------------------------------------------------------------
Pumps Sold without Continuous or Constant Load 75%, 100%, and
Non-Continuous Controls (i.e., Profile. 110% of BEP flow.
bare pumps and pumps sold with
motors).
Pumps Sold with Continuous or Variable Load 25%, 50%, 75%, and
Non-Continuous Controls. Profile. 100% of BEP flow.
------------------------------------------------------------------------
Lack of field data on load profiles and the wide variation in
system operation also make it difficult to select appropriate weights
for the load profiles. For these reasons, the CIP Working Group members
concluded that equal weighting would at least create a level playing
field across manufacturers (see, e.g., Docket No. EERE-2013-BT-NOC-
0039, No. 63 at p. 125), and DOE proposed to adopt this recommendation
in the April 2015 pumps test procedure NOPR. 80 FR 17586, 17604 (April
1, 2015).
[[Page 4106]]
In response to DOE's proposed metrics, load points, and weights, HI
commented that it agrees with the PEICL and PEIVL
metric architecture (HI, No. 8 at p. 14), and the CA IOUs also
indicated their support of DOE's proposed approach (CA IOUs, NOPR
public meeting transcript, No. 7 at p. 110). Therefore, DOE is
adopting, in this final rule, a metric of PEICL for pumps
sold as bare pumps or pumps sold with motors, but without continuous or
non-continuous controls, as proposed in the April 2015 pumps test
procedure NOPR, where the PERCL would be evaluated as the
weighted average input power to the motor at load points corresponding
to 75, 100, and 110 percent of BEP flow, as shown in equation (3):
[GRAPHIC] [TIFF OMITTED] TR25JA16.002
Where:
[omega]i = weighting at load point i (equal weighting or
0.3333 in this case),
Pi\in,m\ = measured or calculated driver power input to
the motor at load point i (hp), and
i = load point corresponding to 75, 100, or 110 percent of BEP flow
as determined in accordance with the DOE test procedure.
Id. at 17602.
Similarly, DOE is adopting a metric of PEIVL for pumps
sold with motors and continuous or non-continuous controls, where
PERVL is calculated as shown in equation (4):
[GRAPHIC] [TIFF OMITTED] TR25JA16.003
Where:
[omega]i = weighting at load point i (equal weighting or
0.25 in this case),
Pi\in,c\ = measured or calculated driver power input to
the continuous or non-continuous controls at load point i (hp), and
i = load point corresponding to 25, 50, 75, or 100 percent of BEP
flow as determined in accordance with the DOE test procedure.
Id. at 17603.
.DOE notes that, in the April 2015 pumps test procedure NOPR, DOE
proposed to refer to the driver power input using the variable
Pi\in\ regardless of whether it applied to pumps sold with
motors, where the driver input power is measured at the input to the
motor, or pumps sold with motors and continuous or non-continuous
controls, where the driver power input is measured at the input to the
controls. In this final rule, DOE is clarifying the terminology by
referring to driver power input to the motor as Pi\in,m\ and
driver power input to the controls as Pi\in,c\. DOE notes
that HI 40.6-2014 uses the variable Pgr to refer to driver
input power and, for the purposes of applying HI 40.6-2014 and the DOE
test procedure, DOE's defined variable (i.e., Pi\in,m\ and
Pi\in,c\) should be treated as equivalent to Pgr.
2. PERSTD: Minimally Compliant Pump
DOE proposed in the April 2015 pumps test procedure NOPR that the
PERCL or PERVL of the pump being rated in the
numerator of these equations would be scaled based on PERCL
of a pump that would minimally comply with the applicable standard for
the same class of pump to provide a rating for each pump model that is
indexed to a standardized value. DOE noted that scaling the
PEICL and PEIVL metrics based on a normalizing
factor would help compare values across and among various pump types
and sizes. 80 FR 17586, 17604 (April 1, 2015). DOE noted that such an
approach would be consistent with the CIP Working Group's
recommendations (Docket No. EERE-2013-BT-NOC-0039, No. 92,
Recommendation #11 at pg. 5) and is similar to the approach suggested
by Europump, a trade association of European pump manufacturers.\33\
Id.
---------------------------------------------------------------------------
\33\ Europump. Extended Product Approach for Pumps: A Europump
Guide. April 8, 2013.
---------------------------------------------------------------------------
In the April 2015 pumps test procedure NOPR, DOE proposed to
determine PERSTD as a baseline, minimally compliant pump,
inclusive of a minimally compliant default motor, defined as a function
of flow and specific speed. To do this, DOE proposed to use an equation
to determine the efficiency of a minimally compliant pump, shown in
equation (5): \34\
---------------------------------------------------------------------------
\34\ This equation reflects that shown in the April 2015 NOPR
public meeting (Docket No. EERE-2013-BT-TP-0055, No. 6 at p.49) and
represents a correction from that published in the April 2015 pumps
test procedure NOPR. 80 FR 17586, 17604 (April 1, 2015).
---------------------------------------------------------------------------
[[Page 4107]]
[GRAPHIC] [TIFF OMITTED] TR25JA16.004
Where:
Q100% = BEP flow rate (gpm),
Ns = specific speed at 60 Hz and calculated using U.S. customary
units, and
C = a constant that is set for the two-dimensional surface described
by equation (5), which is set based on the speed of rotation and
equipment type of the pump model. The values of this constant, or
``C-values,'' are used to establish the minimum, mandatory pump
efficiency with a minimally compliant pump and will be established
in the pump energy conservation standard rulemaking.
DOE developed this equation based on the equation used in the EU to
develop its regulations for clean water pumps, translated to 60 Hz
electrical input power and U.S. customary units.\35\ Id. HI commented
that it agrees with the corrected version of the equation for minimum
pump efficiency equation ([eta]pump,STD) presented during
the public meeting, except that the 555.6 value should be changed to
555.60 and a full significant digit analysis should be conducted to
ensure that two decimal places can be carried for efficiency. (HI, No.
8 at pp. 14-15) HI also indicated that because all data in the equation
are supposed to be normalized to 1,800 or 3,600 rpm,
Q100% should be clarified as the flow at BEP in
gallons per minute normalized to synchronous speed at 60 Hz. In
response to HI's suggested clarifications to the pump efficiency
equipment presented in the April 2015 pump test procedure NOPR and the
slide deck presented at the NOPR public meeting (see Docket No. EERE-
2013-BT-TP-0055, No. 6 at p.49), DOE is clarifying in this final rule
that Q100% in the minimum pump efficiency
equation ([eta]pump,STD) is the BEP flow rate (gpm) measured
at 60 Hz and full impeller diameter and normalized to nominal speed of
rotation of the pump (1,800 or 3,600 rpm). DOE has also revised the
equation for minimum pump efficiency equation
([eta]pump,STD) to match the equation shared during the
public meeting, as suggested by HI.
---------------------------------------------------------------------------
\35\ The equation to define the minimally compliant pump in the
EU is of the same form, but employs different coefficients to
reflect the fact that the flow will be reported in m3/h
at 50 Hz and the specific speed will also be reported in metric
units. Specific speed is a dimensionless quantity, but has a
different magnitude when calculated using metric versus U.S.
customary units. DOE notes that an exact translation from metric to
U.S. customary units is not possible due to the logarithmic
relationship of the terms.
---------------------------------------------------------------------------
Regarding the significance of the 555.6 value in equation (5) and
its impact on the number of significant digits in the resultant
minimally compliant pump efficiency ([eta],pump,STD) or
final determination of PEICL or PEIVL, DOE notes
that all coefficients in the listed equations in DOE's pump test
procedure, including the equation for the minimally compliant pump
efficiency, should be treated as infinitely significant and should not
limit the number of significant digits reported in the resultant value.
As noted in the April 2015 pumps test procedure NOPR and discussed in
more detail in section III.C.2.f, all calculations should be performed
with raw measured values and rounded only when determining
PERCL or PERVL and PEICL or
PEIVL. 80 FR 17586, 17612 (April 1, 2015) However,
considering HI's comment, DOE acknowledges that testing personnel or
manufacturers may inadvertently interpret equation coefficients to be
reflective of a given degree of resolution, precision, or significance.
Therefore, to ensure that, even if the coefficients are incorrectly
treated as carrying an indication of measurement resolution or
precision such rounding does not impact the significance of the
reported PERCL and PEICL or PERVL and
PEIVL values, DOE is adding values (zeros in most cases)
after the decimal to some of the coefficients in the minimally
compliant pump efficiency equation, as shown in equation (6):
[GRAPHIC] [TIFF OMITTED] TR25JA16.005
Where:
Q100% = BEP flow rate measured at full
impeller diameter and normalized to the nominal speed of rotation
for the tested pump (gpm),
Ns = specific speed at 60 Hz and calculated using U.S. customary
units, and
C = a constant that is set for the two-dimensional surface described
by equation (6) based on the speed of rotation and equipment type of
the pump model. This constant, or ``C-value,'' is used to establish
the minimum, mandatory pump efficiency with a minimally compliant
pump and will be established in the pump energy conservation
standard rulemaking.
DOE added sufficient significant digits to ensure efficiency can be
reported to 4 significant digits (i.e., the hundredths place for
efficiencies greater than 10 percent). DOE is also adding zeros to the
equations for calculating the reference system curve (described in
section III.E.1.c) to similarly ensure sufficient significance is
maintained throughout DOE's test procedure calculations.
In equation (6), the specific speed (Ns) is a quasi-non-
dimensional number used to classify pumps based on their relative
geometry and hydraulic characteristics. It is calculated as a function
of the rotational speed, flow rate, head of the pump, and number of
stages as shown in equation (7) below:
[GRAPHIC] [TIFF OMITTED] TR25JA16.006
Where:
Ns = specific speed,
nsp = nominal speed of rotation (rpm),
[[Page 4108]]
Q100% = BEP flow rate at full impeller and
nominal speed (gpm),
H100% = pump total head at BEP flow at full
impeller and nominal speed (ft), and
S = number of stages.
DOE notes that, in the April 2015 pumps test procedure NOPR, the
definition of specific speed did not indicate that the
H100% term should be normalized by the number of
stages. 80 FR 17586, 17604 (April 1, 2015). However, doing so is
consistent with the theoretical calculation of specific speed for
multi-stage pumps used in the pump industry,\36\ as well as the CIP
Working Group discussions and analysis \37\ and treatment in the EU 547
regulations.\38\ DOE also noted this in the second footnote to Table
1.2 in the Framework document. (Docket No. EERE-2011-BT-STD-0031, No.
13 at p. 7) To clarify that, for multi-stage RSV and VTS pumps the
specific speed should be calculated for a single stage only, DOE is
modifying equation (7) to clearly specify that the head at BEP should
be divided by the number of stages with which the pump is being tested.
Further, DOE also proposed using the capital letter ``N'' to define
nominal speed of rotation. DOE notes that HI 40.6-2014 defines the
``specified speed of rotation'' using the nomenclature
``nsp.'' While DOE believes that the phrase ``nominal speed
of rotation'' is clearer and more consistent with DOE's regulatory
approach, DOE believes referencing the same nomenclature as HI 40.6-
2014 will reduce confusion when conducting the pumps test procedure. As
such, in this final rule, DOE is updating the variable used for nominal
speed of rotation to be consistent with HI 40.6-2014.
---------------------------------------------------------------------------
\36\ Wilson, S. Specific Speed. Grundfos White Paper. Available
at: http://www.grundfos.com/content/dam/CBS/global/whitepapers/Specific-Speed.pdf.
\37\ DOE's PEI Calculator that was used to support Working Group
negotiations and analysis divided the pump total head at 100 percent
of BEP flow by the number of stages for multi-stage pumps (See, for
example, Docket No. EERE-2013-BT-NOC-0039, No. 95).
\38\ Council of the European Union. 2012. Commission Regulation
(EU) No 547/2012 of 25 June 2012 implementing Directive 2009/125/EC
of the European Parliament and of the Council with regard to
ecodesign requirements for water pumps. Official Journal of the
European Union. L 165, 26 June 2012.
---------------------------------------------------------------------------
As proposed in the April 2015 pumps test procedure NOPR, the
calculated efficiency of the minimally compliant pump reflects the pump
efficiency at BEP. To calculate PERSTD as the weighted
average input power to a minimally compliant bare pump at the same load
points as PERCL, DOE determined a method to translate the
default efficiency of a minimally compliant pump at BEP to the load
points corresponding to 75 and 110 percent of BEP flow, as shown in
equation (8):
[GRAPHIC] [TIFF OMITTED] TR25JA16.007
Where:
[omega]i = weighting at load point i (equal weighting or
0.3333 in this case);
Pu,i = the measured hydraulic output power at load point
i of the tested pump (hp); \39\
---------------------------------------------------------------------------
\39\ In the April 2015 pumps test procedure NOPR, DOE proposed
to define pump hydraulic output power using the variable
nomenclature PHydro. However, HI 40.6-2014 uses the
nomenclature Pu to refer to pump hydraulic output power.
Therefore, for consistency, DOE is adopting the nomenclature
Pu for hydraulic output power in this final rule.
---------------------------------------------------------------------------
[alpha]i = 0.947 for 75 percent of the BEP flow rate,
1.000 for 100 percent of the BEP flow rate, and 0.985 for 110
percent of the BEP flow rate;
[eta]pump,STD = the minimally compliant pump efficiency,
as determined in accordance with equation (6);
Li = the motor losses at load point i, as determined in
accordance with the procedure specified for bare pumps in sections
III.D.1 and III.D.2; and
i = load point corresponding to 75, 100, or 110 percent of BEP flow,
as determined in accordance with the DOE test procedure.
80 FR 17586, 17605 (April 1, 2015).
DOE also proposed in the April 2015 pumps test procedure NOPR that
the quotient of the hydraulic output power divided by the minimally
compliant pump efficiency for the rated pump would be used to determine
the input power to a minimally compliant pump at each load point, and
that the pump hydraulic output power for the minimally compliant pump
would be the same as that for the particular pump being evaluated.
Specifically, DOE proposed that the hydraulic power in equation (8) at
75, 100, and 110 percent of BEP flow would be calculated using the
following equation (9):
[GRAPHIC] [TIFF OMITTED] TR25JA16.008
Where:
Pu,i = the measured hydraulic output power at load point
i of the tested pump (hp);
Qi = the measured flow rate at load point i of the tested
pump (gpm);
Hi = pump total head at load point i of the tested pump
(ft);
i = load point corresponding to 75, 100, or 110 percent of BEP flow,
as determined in accordance with the DOE test procedure; and
SG = the specific gravity of water at specified test conditions.\40\
\40\ DOE notes that the specific gravity of the test liquid
specified in the DOE test procedure, which is clear water as defined
by section 40.6.5.5 of HI 40.6-2014, requires that the liquid be
between 50-86[emsp14][deg]F, with a maximum kinematic viscosity of
1.6 x 10-\5\ft\2\/s and a maximum density of 62.4 lb/
ft\3\. Based on these parameters, the specific gravity of the test
liquid will be between 1.000 and 0.995 and, therefore, can be
treated as unity when testing in accordance with the DOE test
procedure.
---------------------------------------------------------------------------
[[Page 4109]]
Id.
As indicated in equation (8), the calculated shaft input power for
the minimally compliant pump at each load point is then combined with a
minimally compliant motor for that default motor type and appropriate
size, as described in section III.D.1, and the default part load loss
curve, as described in section III.D.2, to determine the input power to
the motor at each load point. Id.
As noted previously, HI and CA IOUs expressed their support of
DOE's proposed approach. (HI, No. 8 at p. 7; CA IOUs, NOPR public
meeting transcript, No. 7 at p. 110) HI also pointed out in its written
comments that [eta]pump,STD incorrectly appeared twice in
the middle term in the denominator in equation (10) of the April 2015
pumps test procedure NOPR. (HI, No. 8 at p. 15) DOE acknowledges the
correction and has implemented the equation correctly in this final
rule document. Having received no other comments, DOE is adopting the
calculation procedure for PERSTD as proposed in the April
2015 pumps test procedure NOPR, with the minor clarifications regarding
the number of digits reported for certain equation coefficients and
calculation of specific speed for multi-stage pumps as noted above and
correcting the erroneous terms that occurred in the April 2015 pump
test procedure NOPR.
Regarding the calculation of pump hydraulic output power presented
in equation (9), DOE notes that the equation presented in the April
2015 pumps test procedure NOPR specifies a denominator of 3956. 80 FR
17586, 17605 (April 1, 2015). DOE notes that this value represents the
unit conversion from the product of flow (Q) in gpm, head in ft, and
specific gravity (which is dimensionless), to horsepower. Conversely,
DOE observes that HI 40.6-2014 specifies a value of 3960 in section
40.6.6.2 in regards to calculating pump efficiency. HI 40.6-2014 does
not specify a specific unit conversion factor for the purposes of
calculating pump hydraulic output power. Instead HI 40.6-2014 provides
the following equation (10) for determining pump power output:
[GRAPHIC] [TIFF OMITTED] TR25JA16.065
Where:
Pu = the measured hydraulic output power of the tested
pump,\41\
---------------------------------------------------------------------------
\41\ For each of the quantities listed, HI 40.6-2014 provides
multiple metric and U.S. customary units. Appendix E also provides
unit conversions.
---------------------------------------------------------------------------
[rho] = density,
Q = the volume rate of flow,
H = pump total head, and
g = acceleration due to gravity.
As shown in equation (10), the unit conversion factor can be
derived from the product of density and acceleration due to gravity. An
analysis was performed to convert from the metric units for density and
acceleration due to gravity specified in HI 40.6-2014 to the
appropriate units. This analysis found the value of 3956 to be more
accurate and have a greater amount of precision than the 3960 value
specified in HI 40.6-2014. DOE notes that, in its submitted comments,
HI suggested a definition for hydraulic power as ``the mechanical power
transferred to the liquid as it passes through the pump, also known as
pump output power. (Refer to HI 40.6-2014)'' and provided the following
equation (11):
[GRAPHIC] [TIFF OMITTED] TR25JA16.009
Where:
Pu = measured hydraulic output power (hp),
Q = measured flow rate (gpm),
H = measured pump total head (ft), and
SG = the specific gravity of the test fluid.
(HI, No. 8 at p. 10; HI, No. 15 at p. 3)
However, as noted above, DOE believes a unit conversion of 3956 is
more accurate. Therefore, to ensure consistent calculations and results
in the DOE test procedure, in this final rule DOE is maintaining a unit
conversion factor of 3956 instead of the 3960 value specified in HI
40.6-2014 and clarifying that the 3960 calculation in section 40.6.6.2
of HI 40.6-2014 should not be used. The calculation and rounding
requirements for the pumps test procedure are described further in
section III.C.2.f.
C. Determination of Pump Performance
To determine PEICL or PEIVL for applicable
pumps, DOE proposed that the test procedure would require physically
measuring the performance of either: (1) The bare pump, under the
calculation-based methods (see section III.E.1), or (2) the entire
pump, inclusive of any motor, continuous control, or non-continuous
control, under the testing-based methods (see section III.E.2).
Specifically, the input power to the pump at 75, 100, and 110 percent
of BEP flow for PEICL, or at 25, 50, 75, and 100 percent of
BEP flow for PEIVL, would be required for input into the
PEICL or PEIVL equations, respectively. DOE
proposed that, depending on whether the calculation-based method or
testing-based method were applied, a slightly different test method
would apply for measuring pump performance. In the case of the
calculation-based method, only the bare pump performance is physically
measured--the performance of the motor and any continuous or non-
continuous controls would be addressed through a series of
calculations. In the case of the testing-based method, the input power
to the pump at the motor or at the continuous or non-continuous
control, if any, is directly measured and used to calculate
PEICL or PEIVL. 80 FR 17586, 17606-07 (April 1,
2015).
1. Incorporation by Reference of HI 40.6-2014
Regarding the determination of bare pump performance, the CIP
Working Group recommended that whatever procedure DOE adopts, it should
be consistent with HI 40.6-2014 for determining bare pump performance.
(Docket No. EERE-2013-BT-NOC-0039, No. 92, Recommendation #10 at pg. 4)
In preparation of the April 2015 pump test procedure NOPR, DOE reviewed
HI 40.6-2014 and determined that it contains the relevant test methods
needed to accurately characterize the performance of the pumps that
would be addressed by this rulemaking, with a few minor modifications
noted in section III.C.2. Specifically, HI 40.6-2014 defines and
explains how to calculate pump power input,\42\ driver power input (for
testing-based methods),\43\ pump power output,\44\
[[Page 4110]]
pump efficiency,\45\ bowl efficiency,\46\ overall efficiency,\47\ and
other relevant quantities at the specified load points necessary to
determine PEICL and PEIVL. HI 40.6-2014 also
contains appropriate specifications regarding the scope of pumps
covered by the test methods, test methodology, standard rating
conditions, equipment specifications, uncertainty calculations, and
tolerances.
---------------------------------------------------------------------------
\42\ The term ``pump power input'' in HI 40.6-2014 is defined as
``the power transmitted to the pump by its driver'' and is
synonymous with the term ``pump shaft input power,'' as used in this
document.
\43\ The term ``driver power input'' in HI 40.6-2014 is defined
as ``the power absorbed by the pump driver'' and is synonymous with
the term ``pump input power to the driver,'' as used in this
document.
\44\ The term ``pump power output'' in HI-40.6 is defined as
``the mechanical power transferred to the liquid as it passes
through the pump, also known as pump hydraulic power.'' It is used
synonymously with ``pump hydraulic power'' in this document.
\45\ The term ``pump efficiency'' is defined in HI 40.6-2014 as
a ratio of pump power output to pump power input.
\46\ The term ``bowl efficiency'' is defined in HI 40.6-2014 as
a ratio of pump power output to bowl assembly power input and is
applicable only to VTS and RSV pumps.
\47\ The term ``overall efficiency'' is defined in HI 40.6-2014
as a ratio of pump power output to driver power input and describes
the combined efficiency of a pump and driver.
---------------------------------------------------------------------------
Accordingly, in the April 2015 pumps test procedure NOPR, DOE
proposed to incorporate by reference HI 40.6-2014 as part of DOE's test
procedure for measuring the energy consumption of pumps, with the minor
modifications and exceptions listed in III.C.2.a through III.C.2.f of
the NOPR document and discussed in more detail in section III.C.2 of
this final rule. 80 FR 17586, 17607-12 (April 1, 2015).
HI commented that it agrees with using HI 40.6-2014 as the basis of
DOE test procedure for pumps. (HI, No. 8 at p. 15) DOE received no
other comments on this proposal in the April 2015 pumps test procedure
NOPR and, therefore, is incorporating by reference HI 40.6-2014 as the
basis for the DOE pumps test procedure, with the minor modifications
and exceptions listed in section III.C.2 of this final rule.
2. Minor Modifications and Additions to HI 40.6-2014
In general, DOE finds the test methods contained within HI 40.6-
2014 are sufficiently specific and reasonably designed to produce test
results that accurately measure the energy efficiency and energy use of
applicable pumps. However, as proposed in the April 2015 pumps test
procedure NOPR, DOE believes a few minor modifications are necessary to
ensure repeatable and reproducible test results and to provide
measurement methods and equipment specifications for the entire scope
of pumps that DOE is addressing as part of this final rule. DOE's
proposed modifications and clarifications to HI 40.6-2014, comments
received on those topics, DOE's responses to those comments, and any
changes to the April 2015 pumps test procedure NOPR proposals that DOE
is making as a result are addressed in the subsequent sections
III.C.2.a through III.C.2.f.
a. Sections Excluded From DOE's Incorporation by Reference
While DOE is referencing HI 40.6-2014 as the basis for its test
procedure, in the April 2015 pumps test procedure NOPR, DOE noted that
some sections of the standard are not applicable to DOE's regulatory
framework. Specifically, DOE noted that section 40.6.5.3 provides
requirements regarding the generation of a test report and appendix
``B'' provides guidance on test report formatting, both of which are
not required for testing and rating pumps in accordance with DOE's
procedure. In addition, DOE noted that section A.7 of appendix A,
``Testing at temperatures exceeding 30 [deg]C (86 [deg]F),'' HI 40.6-
2014 addresses testing at temperatures above 30 [deg]C (86 [deg]F),
which is inconsistent with DOE's proposal to only test with liquids
meeting the definition of ``clear water'' established in section
40.6.5.5 of HI 40.6-2014. As such, DOE proposed not incorporating by
reference section 40.6.5.3, section A.7, and appendix B of HI 40.6-
2014. 80 FR 17586, 17608 (April 1, 2015).
HI commented that it agrees with the proposal to not incorporate by
reference section 40.6.5.3, section A.7, and appendix B of HI 40.6-2014
as part of the DOE test procedure. (HI, No. 8 at 15) DOE received no
other comments on this proposal in the April 2015 pumps test procedure
NOPR and, as such, is adopting the proposal in the April 2015 pumps
test procedure NOPR to incorporate by reference HI 40.6-2014 except for
section 40.6.5.3, section A.7, and appendix B in this final rule.
In reviewing the relevant sections of HI 40.6-2014, DOE also noted
that section 40.6.4.1, ``Vertically suspended pumps,'' which contains
specific testing instructions for vertically suspended VS1 and VS3
pumps, mentions VS0 pumps. Specifically, section 40.6.4.1 states ``A
variation to this is pump type VS0 . . . [a] VS0 [pump] is evaluated as
a pump end only similar to the bowl performance and efficiency
described for the line-shafted product.'' DOE notes that this language
in HI 40.6-2014 is intended to exclude VS0 pumps from the
specifications in section 40.6.4.1 and specify that testing for VS0, as
a type of vertical turbine pump, must consider only bowl assembly total
head and, for VTS bare pumps, only the bowl assembly power input, as
defined in section 40.6.2 of HI 40.6-2014. However, DOE believes that
the language of section 40.6.4.1 is somewhat confusing and may lead to
misinterpretation by some not familiar with all the varieties of
vertical turbine and vertically suspended pumps and their specific
testing considerations. Therefore, in this final rule, DOE is
clarifying that the specifications of section 40.6.4.1 of HI 40.6-2014
do not apply to VTS pumps and that the performance of VTS bare pumps
considers the bowl performance only. For VTS pumps sold with motors
evaluated using the testing-based approaches discussed in section
III.E.2, the bowl assembly total head and driver power input are to be
used to determine the pump performance.
b. Data Collection and Determination of Stabilization
In order to ensure the repeatability of test data and results, the
DOE pump test procedure must provide instructions regarding how to
sample and collect data at each load point such that the collected data
are taken at stabilized conditions that accurately and precisely
represent the performance of the pump at that load point. Section
40.6.5.5.1 of HI 40.6-2014 provides that all measurements shall be made
under steady state conditions, which are described as follows: (1) No
vortexing, (2) margins as specified in ANSI/HI 9.6.1 Rotodynamic Pumps
Guideline for NPSH Margin, and (3) when the mean value of all measured
quantities required for the test data point remains constant within the
permissible amplitudes of fluctuations defined in Table 40.6.3.2.2 over
a minimum period of 10 seconds before performance data are collected.
HI 40.6-2014 does not specify the measurement interval for
determination of steady state operation. However, DOE understands that
a minimum of two stabilization measurements are required to calculate
an average. DOE proposed in the April 2015 pumps test procedure NOPR
that the stabilization measurement interval should not be greater than
5 seconds, thereby allowing for no fewer than two separate measurements
that each have an integration time of no more than 5 seconds. 80 FR
17586, 17606 (April 1, 2015).
Section 40.6.3.2.2 of HI 40.6-2014, ``Permissible fluctuations,''
also provides that permissible damping devices may be used to minimize
noise and large fluctuations in the data in order to achieve the
specifications noted in Table 40.6.3.2.2. In the April 2015 pumps test
procedure NOPR, DOE proposed to specify that damping devices would only
be permitted to integrate up to the measurement interval to ensure that
each stabilization data point is reflective of a separate measurement.
80 FR 17586, 17606 (April 1, 2015).
DOE requested comment on its proposal to require that data be
[[Page 4111]]
collected at least every 5 seconds for all measured quantities. HI
commented that collecting stabilization data every 5 seconds is not
standard industry practice, and that this practice would require
manufacturers to obtain automated data acquisition systems, posing
additional and unnecessary burden not agreed to by the CIP Working
Group. (HI, No. 8 at pp. 15-16) HI recommended that steady-state
operation be verified by recording flow at the beginning and end of the
data acquisition and checking that the difference in flow is within the
allowable fluctuation identified in HI 40.6-2014 (Table 40.6.3.2.2). HI
also stated that the two flow readings should be separated by a minimum
of 5 seconds.
DOE also requested comment on its proposal to allow damping
devices, as described in section 40.6.3.2.2, but with integration
limited to the data collection interval and HI commented that it agrees
with this proposal except with respect to the interval used for data
collection. (HI, No. 8 at p. 16)
After reviewing HI's comments and considering the proposal in the
April 2015 pump test procedure NOPR, DOE maintains that at least two
unique measurements, at a minimum, are necessary to determine
stabilization prior to recording a measurement at a given load point.
DOE also agrees with HI that it is appropriate to continue to reference
the requirements for permissible fluctuations and minimum duration of
stabilization testing, as detailed in HI 40.6-2014 sections 40.6.3.2.2
and 40.6.5.5.1. However, in light of HI's concern regarding automated
data collection requirements if the interval of data collection is
specified as 5 seconds, DOE has determined that a threshold for the
data collection interval does not need to be specified to determine
steady state operation provided the other requirements for
stabilization are satisfied. That is, provided that at least two unique
measurements are recorded, their mean computed, and that the two unique
measurements are not farther away from the mean than the tolerance
specified in the ``permissible amplitude of fluctuation'' table (Table
40.6.3.2.2) in HI 40.6-2014, the pump can be determined to be
stabilized and data recorded for the purposes of conducting the DOE
test procedure. DOE notes that section 40.6.5.5.1 requires that steady
state be determined for a minimum of 10 seconds, but that a longer time
can be used if necessary, in which case the two unique measurements
could be recorded more than 5 seconds apart. For example, if a facility
were not equipped with a data acquisition system, stabilization could
be determined over 1 minute and data taken every 30 seconds to
determine stabilized operation at each flow point.
Regarding the use of damping devices, DOE is maintaining the
requirements that the integration time for each measurement cannot be
greater than the measurement interval. This is necessary to ensure that
the measurements used to determine stabilization are, in fact, unique.
Therefore, in this test procedure final rule, DOE is adopting
stabilization requirements consistent with HI section 40.6.3.2.2 and
section 40.6.5.5.1, except that at least two unique measurements must
be used to determine stabilization and any damping devices are only
permitted to integrate up to the data collection interval. DOE notes
that, for physical dampening devices, the pressure indicator/signal
must register 99 percent of a sudden change in pressure over the
measurement interval to satisfy the requirement for unique
measurements, consistent with annex D of ISO 3966:2008(E),
``Measurement of fluid flow in closed conduits--Velocity area method
using Pitot static tubes,'' which is referenced in HI 40.6-2014 for
measuring flow with pitot tubes.
c. Modifications Regarding Test Consistency and Repeatability
Sections 40.6.5.6 and 40.6.5.7 of HI 40.6-2014 specify test
arrangements and test conditions. However, DOE finds that the
standardized test conditions described in these sections are not
sufficient to produce accurate and repeatable test results. To address
these potential sources of variability or ambiguity, in the April 2015
pumps test procedure NOPR, DOE proposed to adopt several additional
requirements regarding the nominal pump speed, the input power
characteristics, and the number of stages to test for multi-stage pumps
to further specify the procedures for testing pumps in a standardized
and repeatable manner. 80 FR 17586, 17608 (April 1, 2015).
Pump Speed
The rotating speed of a pump affects the efficiency and
PEICL or PEIVL of that pump. To limit variability
and increase repeatability within the test procedure, DOE proposed in
the April 2015 pumps test procedure NOPR to require all test data to be
normalized to one of two nominal speeds--1,800 or 3,600 rpm at 60 Hz.
Specifically, pumps designed to operate at any speed of rotation
between 2,880 and 4,320 rpm would be rated at 3,600 rpm, and pumps
designed to operate at any speed of rotation between 1,440 and 2,160
rpm would be rated at 1,800 rpm, as noted in Table III.3. 80 FR 17586,
17609 (April 1, 2015).
Table III.3--Nominal Speed of Rotation for Different Configurations of Pumps
----------------------------------------------------------------------------------------------------------------
Pump design speed of Nominal speed of
Pump configuration rotation Style of motor rotation for rating
----------------------------------------------------------------------------------------------------------------
Bare Pump............................ 2,880 and 4,320 rpm.... N/A.................... 3,600 rpm.
1,440 and 2,160 rpm.... 1,800 rpm.
N/A.................... 2-pole Induction Motor. 3,600 rpm.
N/A.................... 4-pole Induction Motor. 1,800 rpm.
Pump + Motor OR...................... N/A.................... Non-Induction Motor 3,600 rpm.
Pump + Motor + Control............... Designed to Operate
between 2,880 and
4,320 rpm.
N/A.................... Non-Induction Motor 1,800 rpm.
Designed to Operate
between 1,440 and
2,160 rpm.
----------------------------------------------------------------------------------------------------------------
DOE proposed that, for pumps sold without motors, the nominal speed
would be selected based on the speed of rotation for which the pump is
designed to be operated, while for pumps sold with motors, the nominal
speed of rotation would be selected based on the speed(s) for which the
motor is designed to operate. DOE also clarified that pumps designed to
operate at speeds that include both ranges would be rated at both
nominal speeds of rotations since each nominal speed rating represents
a different basic model of pump. Finally, DOE noted that these speed
ranges are not exclusive. That is, if a pump were to be designed to
operate from 2,600 to 4,000 rpm, such a pump
[[Page 4112]]
would have a nominal speed of rotation of 3,600 rpm for the purposes of
testing and rating the pump, even though part of the operating range of
the pump (i.e., 2,600 to 2,880 rpm) falls outside DOE's specified speed
ranges.
In DOE's April 2015 pumps test procedure NOPR proposal, DOE
acknowledged that it may not be feasible to operate pumps during the
test at exactly the nominal speeds of 3,600 or 1,800 rpm and noted that
section 40.6.5.5.2 of HI 40.6-2014 allows for tested speeds up to 20
percent off of the nominal speed, provided the tested speed does not
vary more than 1 percent at each load point as required by
section 40.6.3.2.2 of HI 40.6-2014. However, to ensure consistent and
comparable test results, DOE proposed that all data collected during
the test procedure at the speed measured during the test should be
adjusted to the nominal speed prior to use in subsequent calculations
and the PEICL or PEIVL of a given pump should be
based on the nominal speed. Id. For pumps sold with motors and
continuous or non-continuous controls and that are tested using the
testing-based method described in section III.E.2.c, DOE proposed that
this adjustment to the nominal speed only apply at the 100 percent of
BEP flow load point and that subsequent part load points be measured at
reduced speed and used in subsequent calculations without adjustment.
DOE also proposed to use the methods in HI 40.6-2014 section
40.6.6.1.1, ``Translation of the test results into data based on the
specified speed of rotation (for frequency) and density'' to adjust any
data from the tested speed to the nominal speed. Id.
DOE requested comment on its proposal to require data collected at
the pump speed measured during testing to be normalized to the nominal
speeds of 1,800 and 3,600 rpm. HI commented that it agrees with the
proposal. (HI, No. 8 at p. 16)
Therefore, in this test procedure final rule, DOE is opting to
adopt the operating speed limits proposed in the April 2015 pumps test
procedure NOPR and discussed in section III.A.4 for the purposes of
applying this test procedure final rule.
DOE also requested comment on its proposal to adopt the
requirements in HI 40.6-2014 regarding the deviation of tested speed
from nominal speed and the variation of speed during the test,
specifically regarding whether maintaining tested speed within 1 percent of the nominal speed is feasible and whether this
approach would produce more accurate and repeatable test results. HI
commented that it does not believe it is feasible to maintain tested
speed within 1 percent of the specified nominal speed
because typical motor speed-load curves do not meet this criterion.
(HI, No. 8 at p. 16) However, HI also noted that data could be
collected and rotating speed maintained at 1 percent for a
particular data collection point. DOE believes that HI may have
misinterpreted the proposal in the April 2015 pumps test procedure
NOPR. In the NOPR, DOE proposed maintaining the speed of rotation at
each test point within the 1 percent speed tolerance, but
that the speed of rotation at each test point could vary from the
nominal speed of rotation 20 percent, consistent with HI
40.6-2014. DOE agrees that the 1 percent speed tolerance is
applicable to determining stabilization at each data collection point
only and is not determined relative to nominal speed and, therefore, is
adopting the April 2015 pump test procedure NOPR proposal to adopt the
nominal speed tolerances listed in section 40.6.5.5.2 of HI 40.6-2014,
as well as the stabilization requirements provided in section
40.6.3.2.2 of HI 40.6-2014 in this test procedure final rule.
Additionally, DOE is adopting the provisions that all measured data be
translated to the nominal rating speed.
Power Supply Characteristics
Because pump power consumption is a component of the proposed
metric, inclusive of any motor and continuous or non-continuous
controls, measuring power consumption is an important element of the
test. The characteristics of the power supplied to the pump affect the
accuracy and repeatability of the measured power consumption of the
pump. As such, to ensure accurate and repeatable measurement of power
consumption, in the April 2015 pumps test procedure NOPR, DOE specified
nominal values for voltage, frequency, voltage unbalance, total
harmonic distortion (THD), and impedance levels, as well as tolerances
about each of these quantities, that must be maintained at the input
terminals to the motor, continuous control, or non-continuous control,
as applicable when performing the testing-based methods or when using a
calibrated motor to determine bare pump performance. 80 FR 17586, 17610
(April 1, 2015).
To determine the appropriate power supply characteristics for
testing pumps with motors (but without continuous or non-continuous
controls) and pumps with both motors and continuous or non-continuous
controls, DOE examined applicable test methods for electric motors and
VSD systems. DOE determined that the Institute of Electrical and
Electronics Engineers (IEEE) Standard 112-2004, ``IEEE Standard Test
Procedure for Polyphase Induction Motors and Generators,'' (IEEE 112-
2004) and the Canadian Standards Association (CSA) C390-10, ``Test
methods, marking requirements, and energy efficiency levels for three-
phase induction motors,'' (CSA C390-10) are the most relevant test
methods for measuring input power to electric motors, as they are the
test methods incorporated by reference as the DOE test procedure for
electric motors. Other widely referenced industry standard test methods
for motors include: IEC 60034-1 Edition 12.0 2010-02, ``Rotating
electrical machines--Part 1: Rating and performance'' (IEC 60034-
1:2010) and NEMA MG 1-2014, ``Motors and Generators'' (NEMA MG 1-2014).
DOE also identified both AHRI 1210-2011, ``2011 Standard for
Performance Rating of Variable Frequency Drives,'' (AHRI 1210-2011) and
the 2013 version of CSA Standard C838, ``Energy efficiency test methods
for three-phase variable frequency drive systems,'' (CSA C838-13) as
applicable methods for measuring the performance of VSD control
systems. A summary of DOE's proposed power supply characteristics and
the requirements of the industry standards DOE referenced in developing
such a proposal are summarized in Table III.4.
Table III.4--Summary of Tolerances Proposed by DOE in the April 2015 Pumps Test Procedure NOPR and Referenced in Relevant Industry Standards
--------------------------------------------------------------------------------------------------------------------------------------------------------
Voltage Voltage waveform
Reference document Section unbalance Voltage tolerance Frequency tolerance distortion Source impedance
--------------------------------------------------------------------------------------------------------------------------------------------------------
April 2015 Pumps Test III.C.2.c..... 0.5%..... 0.5%..... THD <=5%.............
Procedure NOPR Proposal. minus>0.5%.
HI 40.6-2014 (calibrated C.4.1......... ............. 5%....... 1%.......
motors).
[[Page 4113]]
CSA C390-10 (motors)......... 5.2........... 0.5%..... 0.5%..... THD <=5% (to 20th)...
minus>0.5%.
IEC 60034-1:2010 (motors).... 7.3........... ............. 5% * 2% *
(zone A). (zone A).
9.11.......... ............. ..................... ..................... THD <=5% (to 100th).. .....................
IEEE 112-2004 (motors)....... 3.1........... <=0.5%....... ..................... 0.5%..... THD <=5%.............
NEMA MG 1-2014 (motors)...... 7.7.3.2....... <=1%......... ..................... 0.5%..... deviation factor .....................
<=10%.
12.44.1....... ............. 10% **... 5% **....
12.45......... <=1% [dagger]
AHRI 1210-2011 (VFDs)........ 5.1.2......... <=0.5%....... 0.5%..... 0.5%..... ..................... <=1%.
CSA C838-13 (VFDs)........... 5.3........... 0.5%..... 0.5%..... THD <=5% (to 20th)... 1% < value <=3% of
minus>0.5%. VFD.
--------------------------------------------------------------------------------------------------------------------------------------------------------
* Values are for the overall bounds of the hexagonal surface in IEC Figure 12.
** NEMA states that performance within these voltage and frequency variations will not necessarily be in accordance with the standards established for
operation at rated voltage and frequency.
[dagger] NEMA states that performance will not necessarily be the same as when the motor is operating with a balanced voltage at the motor terminals.
HI commented that it disagrees with the power conditioning
requirements proposed in the April 2015 pumps test procedure NOPR;
knows of no pump test labs that meet them; and views them as a
significant and unnecessary burden to manufacturers that were not
agreed to by the CIP Working Group. HI specifically cited costs
associated with the proposed limitation on voltage unbalance, and noted
that the nominal motor efficiency values used for the calculation
method have a less stringent tolerance of 2 percent. HI also indicated
that testing with unconditioned power will result in a lower efficiency
value and a higher PEI value than when testing with conditioned power.
HI proposed that whereas conditioned power, as proposed in the April
2015 pumps test procedure NOPR, should be used for DOE enforcement
testing and motor calibration, manufacturer test labs should only be
held to the 3 percent limit for driver input power fluctuation
specified in HI 40.6-2014. (HI, No. 8 at pp. 16-18)
Regal Beloit stated during the April 2015 NOPR public meeting that
motor manufacturers faced similar challenges when motor standards were
introduced, and third-party test labs adapted to help meet the power
conditioning requirements. Regal Beloit also indicated that AHRI 1210
was not developed for pumps, and CSA C838 would be preferred. In
addition, Regal Beloit expressed concern that any loosening of the
power conditioning requirements could hinder differentiation between
lower and higher performing products. (Regal Beloit, NOPR public
meeting transcript, No. 7 at pp. 137-46)
As noted in the April 2015 pumps test procedure NOPR, DOE
recognizes that driver efficiency can vary: (a) When the input voltage
level is not exactly at the nameplate voltage, (b) when the fundamental
frequency of the input voltage waveform is not exactly 60 Hz, (c) when
input voltage phases are unbalanced, and/or (d) when the input voltage
waveform is not strictly sinusoidal. However, DOE acknowledges the
concerns of HI regarding the burden of providing power meeting strict
voltage, frequency, voltage unbalance, and THD limits. As EPCA requires
DOE test procedures to not be unduly burdensome to conduct (42 U.S.C.
6314(a)(2)), DOE, in this final rule, is reconsidering the proposed
requirements regarding the power supply characteristics to find a
compromise among repeatability, accuracy, and test burden.
DOE notes that HI's proposal of a 3 percent tolerance
on power is not feasible without some parameters around power supply
characteristics, as variation in voltage unbalance, harmonics, voltage,
and frequency will affect the variability in the measurement of input
power to the pump insofar as it will affect the performance and
efficiency of the motor. That is, for example, increased voltage
unbalance will affect motor performance such that testing the same pump
sold with a motor under differing voltage unbalance conditions will
result in different measured pump performance. This can be viewed
either as: (1) Different (typically lower) hydraulic output for the
same input power to the motor or (2) different (typically increased)
input power to the motor to deliver the same hydraulic output power.
Under the latter scenario, DOE has developed an approach to
correlate variability in power supply characteristics with variability
in the measured input power to the motor. Similarly, DOE separately
considered how variability in power supply characteristics would impact
input power to the continuous or non-continuous controls. Specifically,
DOE determined, for each power supply characteristic (i.e., voltage,
frequency, voltage unbalance, and voltage THD) the level of variability
that was associated with HI's proposed acceptable tolerance of 3 percent on driver input power. As such, DOE considered each of
the power supply variables individually to determine if alternative,
less burdensome requirements were feasible.
Regarding the impact of variation in voltage, section 12.44.1 of
NEMA MG 1-2014 specifies that AC motors shall operate successfully
under running conditions at rated load with a variation in the voltage
up to 10 percent of rated (nameplate) voltage with rated
frequency for induction motors. Similarly, according to Figure 5-1 in
the DOE Advanced Manufacturing Office (AMO) ``Premium Efficiency Motor
Selection and Application Guide'' (AMO motor handbook), the efficiency
of a ``pre-EPAct'' \48\ standard efficiency motor varies by less than
3 percent when operated at 10 percent of
nameplate voltage. Section 2.2.2 of ANSI C84.1-2011 states that the
nominal voltage of a system is near the voltage level at which the
system
[[Page 4114]]
normally operates, and that systems generally operate at voltage levels
about 5 to 10 percent below the maximum system voltage for which system
components are designed. DOE also notes that section C.4.1 of HI 40.6-
2014 indicates that when a calibrated motor is used to determine the
pump input power, the voltage shall be the same as used during the
calibration of the motor with a tolerance of 5 percent;
this specification is consistent with the 5 percent
outermost limits in Figure 12 of IEC 60034-1:2010 for zone A
(continuous operation). In consideration of these standards, DOE has
determined that, within reasonable limits, motor performance does not
appear to be strongly affected by variation in voltage. However, DOE
believes that it is important to ensure voltage is maintained within
those reasonable limits. Therefore, in this final rule, DOE is adopting
a tolerance on voltage consistent with the requirements in HI 40.6-2014
of 5.0 percent of the nominal rated voltage. DOE believes
such a proposal provides representative measurements without imposing
undue test burden on manufacturers.
---------------------------------------------------------------------------
\48\ Energy Policy Act of 2005, Public Law 109-58, 119 Stat. 594
---------------------------------------------------------------------------
Considering the impact of frequency on the rated performance of
pumps and motors, the AMO motor handbook states that a premium
efficiency motor is usually 0.5 to 2.0 percent more efficient when
operating at 60 Hz than when the same motor is driven by a 50-Hz power
supply, suggesting that motor performance is not strongly dependent on
frequency. However, section C.4.1 of HI 40.6-2014 indicates that when a
calibrated motor is used to determine the pump input power, the
frequency shall be the same as used during the calibration of the motor
with a tolerance of 1 percent. DOE believes that the HI
requirement would be equally applicable to determining the performance
of pumps sold with motors and pumps sold with motors and continuous or
non-continuous controls under the testing-based methods to ensure
repeatable and accurate measurements. Therefore, in this final rule,
DOE is relaxing the proposal in the April 2015 pumps test procedure
NOPR to instead limit frequency variation of 1.0 percent of
nameplate frequency, consistent with HI 40.6-2014. DOE also notes that
the U.S. electric grid typically provides power at a frequency within
these bounds and, as such, DOE believe such a tolerance will not impose
undue test burden. Further, DOE believes that maintaining tolerances
consistent with the typical U.S. electric power supply is necessary to
ensure repeatability of the test and ensure that the test is
representative of the energy consumption of the equipment.
Specifically, a specification of 1 percent is consistent
with the 1 percent tolerance for continuous operation
across all durations of off-nominal frequency specified in the North
American Electric Reliability Corporation (NERC) Standard PRC-024-1,
``Generator Frequency and Voltage Protective Relay Settings.''
Regarding voltage unbalance, DOE notes that motor performance will
vary as a function of voltage unbalance. Specifically, NEMA MG 1-2014
includes a horsepower derating curve for up to 5 percent voltage
unbalance and recommends limiting voltage unbalance to 1 percent,
noting that motor performance will not necessarily be the same as when
the motor is operating with a balanced voltage at the motor terminals.
Similarly, Table 5-3 in the AMO motor handbook relates a voltage
unbalance of 3 percent to a decrease in motor efficiency of 2 to 3
percent, compared with a decrease of 5 percent or more for a voltage
unbalance of 5 percent.\49\ DOE notes that a variation of 3 percent in
motor efficiency equates to a 3 percent variability in measured input
power to the motor.
---------------------------------------------------------------------------
\49\ DOE Office of Energy Efficiency and Renewable Energy
(EERE), Premium Efficiency Motor Selection and Application Guide--A
Handbook for Industry (February 2014, www.energy.gov/eere/amo/motor-systems).
---------------------------------------------------------------------------
Given the dependence of motor, and thus pump, performance on
voltage unbalance, DOE then evaluated the relative burden associated
with providing different levels of voltage unbalance in the test
facility, in an effort to determine a level of voltage unbalance that
would not be unduly burdensome to specify in the test procedure. DOE
researched typical levels of voltage unbalance available on the
national electric grid, based on utility standards and specifications
for generation and distribution of power. NEMA MG 1-2014 states that if
a motor is subjected to more than 1 percent voltage unbalance the
manufacturer should be consulted regarding this unusual service
condition, and the AMO motor handbook states that unbalances exceeding
1 percent will void most manufacturers' warranties. DOE also found that
PG&E Electric Rule No. 2 states that the voltage balance between phases
for service delivery voltages will be maintained by PG&E as close as
practicable to 2.5 percent.\50\ Similarly, Annex C of ANSI C84.1-2011
indicates that approximately 98 percent of the electric supply systems
surveyed were found to be below 3.0 percent voltage unbalance, and 66
percent were found to be below 1.0 percent; the standard states that
electric supply systems should be designed and operated to limit the
maximum voltage unbalance to 3 percent when measured at the electric-
utility revenue meter under no-load conditions.\51\ Therefore, DOE
determines 3.0 percent voltage unbalance provides a reasonable
tolerance, would be generally available to most testing facilities
using grid-supplied power and would limit the impact on input power to
less than 3 percent, consistent with HI's recommendation.
---------------------------------------------------------------------------
\50\ Accessed on August 21, 2015, at www.pge.com/tariffs/tm2/pdf/ELEC_RULES_2.pdf.
\51\ American National Standard For Electric Power Systems and
Equipment--Voltage Ratings (60 Hertz).
---------------------------------------------------------------------------
Regarding limitations on harmonic distortion on the power supply,
the AMO publication, ``Improving Motor and Drive System Performance''
(AMO motor sourcebook) states that electrical equipment is often rated
to handle 5 percent THD (as defined in IEEE Std 519), and notes that
motors are typically much less sensitive to harmonics than computers or
communication systems.\52\ Similarly, IEC 60034-1:2010 specifies a
limit of 5 percent voltage THD, measured to the 100th harmonic. In
addition, for bus voltage of 1.0 kV or less at the point of common
coupling (PCC), section 5.1 of IEEE Std 519-2014 recommends line-to-
neutral harmonic voltage limits of 5.0 percent individual harmonic
distortion and 8.0 percent voltage THD for weekly 95th percentile short
time (10 min) values, measured to the 50th harmonic. The IEEE standard
also indicates that daily 99th percentile very short time (3 second)
values should be less than 1.5 times these values. NEMA MG 1-2014 uses
different metrics (voltage waveform deviation factor and harmonic
voltage factor or HVF) to establish harmonic voltage limits and
horsepower derating factors for motors. However, the NEMA metrics are
not directly comparable to voltage THD, and the HVF derating curve was
developed under the assumption that any voltage unbalance or even
harmonics are negligible.\53\ In
[[Page 4115]]
consideration of these recommendations regarding voltage THD limits and
potentially significant impacts on motor performance, in this final
rule, DOE is limiting voltage THD to <=12.0 percent (corresponding to
the IEEE 3-second limit but measured to the 40th harmonic) in this
final rule to ensure representative and repeatable measurements. DOE
also notes that a limit of <=12.0 percent voltage THD is not unduly
burdensome for test labs as it is within the bounds of standardized
voltage THD limits placed on grid operators and, thus, is generally
available on the national electric power grid.
---------------------------------------------------------------------------
\52\ DOE EERE, Improving Motor and Drive System Performance--A
Sourcebook for Industry (February 2014, www.energy.gov/eere/amo/motor-systems).
\53\ NEMA's voltage deviation factor is calculated as the
maximum difference between corresponding ordinates of the voltage
waveform and of the equivalent sine wave, divided by the maximum
ordinate of the equivalent sine wave when the waves are superimposed
such that the maximum difference is minimized. Harmonic voltage
factor (HVF) is calculated by squaring the ratio of harmonic voltage
to rated voltage for each odd harmonic not divisible by three (up to
some specified order, e.g., the 13th harmonic in IEC 60034-1:2010),
dividing each result by the order of the corresponding harmonic, and
then taking the square root of the sum of these quotients. Voltage
THD is calculated by taking the square root of the sum of squares of
each RMS harmonic voltage (up to some specified order, e.g., the
50th harmonic in IEEE 519-2014), and then dividing by the RMS
fundamental voltage.
---------------------------------------------------------------------------
DOE also discussed source impedance in the NOPR and considered
adopting specifications in AHRI 1210-2011 (source impedance <=1
percent) or CSA C838-13 (source impedance > 1.0 percent of VFD and <=
3.0 percent of VFD) for motors and speed controls. 80 FR 17586, 17611-
12 (April 1, 2015). DOE understands that a nonlinear load can distort
the voltage waveform, depending on the magnitudes of the source
impedance and current distortion.\54\ However, DOE also understands
that motors are not a significant source of harmonics in the current
waveform if the steel core is not magnetically saturated,\55\ and that
motor efficiency is not greatly affected by harmonics in the voltage
waveform if voltage THD is sufficiently limited. Therefore, in this
final rule, DOE is not specifying source impedance requirements. DOE
believes that the adopted requirements for the preceding four power
supply characteristics (i.e., voltage unbalance, voltage, frequency,
and voltage THD) will sufficiently limit variability in motor
performance resulting from variations in the characteristics of the
mains power supplied to the motor.
---------------------------------------------------------------------------
\54\ IEEE Std 1560-2005, ``IEEE Standard for Methods of
Measurement of Radio-Frequency Power-Line Interference Filter in the
Range of 100 Hz to 10 GHz'' (February 2006).
\55\ Fire Protection Research Foundation, ``Evaluation of the
Impact on Non-Linear Power On Wiring Requirements for Commercial
Buildings'' (June 2011, www.nfpa.org/research/fire-protection-research-foundation/projects-reports-and-proceedings/electrical-safety/new-technologies-and-electrical-safety/evaluation-of-the-impact-on-non-linear-power).
---------------------------------------------------------------------------
Regarding the impact of variation in power supply characteristics
on continuous and non-continuous controls, DOE understands that motors,
continuous controls, and non-continuous controls all have similar power
conditioning requirements because they will be subjected to similar
electrical conditions in the field. That is, based on DOE's research,
manufacturers appear to have designed motors to be reasonably tolerant
of variability in power supply characteristics (or power quality) that
are characteristic of typical grid operation, but their performance is
significantly impacted at levels outside the bounds of that commonly
experienced in their field. While less information is available of the
response of continuous and non-continuous controls to these power
supply variables, DOE expects this relationship to be true for such
controls as well. For example, NEMA guidance published in 2007 states
that adjustable frequency controls can operate on power systems with a
voltage unbalance not exceeding 3 percent.\56\ In addition, guidance
published by the Electric Power Research Institute (EPRI) in 2001
indicates that VSDs should be specified to operate without any problem
for a voltage unbalance of 2 percent.\57\ Consequently, DOE is
applying, in this final rule, the same power conditioning requirements
to pumps tested with motors and pumps tested with motors and continuous
or non-continuous controls.
---------------------------------------------------------------------------
\56\ NEMA Application Guide for AC Adjustable Speed Drive
Systems (December 2007, www.nema.org/Standards/Pages/Application-Guide-for-AC-Adjustable-Speed-Drive-Systems.aspx).
\57\ EPRI Guide to the Industrial Application of Motors and
Variable-Speed Drives (September 2001, www.epri.com/abstracts/Pages/ProductAbstract.aspx?ProductId=000000000001005983).
---------------------------------------------------------------------------
DOE notes that these requirements are applicable to pumps sold with
motors and pumps sold with motors and continuous or non-continuous
controls rated using the testing-based method, as such methods require
measurement of electrical input power to the motor or control.
Commensurately, these requirements are applicable to any pumps rated
using a calculation-based method, including bare pumps, pumps sold with
applicable electric motors, and pumps sold with applicable electric
motors and continuous controls, when the bare pump is tested using a
calibrated motor to determine pump shaft input power. Pumps evaluated
based on the calculation method where the input power to the motor is
determined using equipment other than a calibrated motor would not have
to meet these requirements, as variations in voltage, frequency,
voltage unbalance, and voltage THD are not expected to significantly
affect the tested pump's energy performance.
Number of Stages for Multi-Stage Pumps
RSV and VTS pumps are typically multi-stage pumps that may be
offered in a variety of stages.\58\ The energy consumption
characteristics of such multi-stage pumps vary, approximately linearly,
as a function of the number of stages. However, to simplify
certification requirements and limit testing burden, DOE proposed in
the April 2015 pumps test procedure NOPR that certification of RSV and
VTS pumps be based on testing with the following number of stages:
---------------------------------------------------------------------------
\58\ The stages of VTS pumps are also commonly referred to as
``bowls.'' See section 2.1.3.1 and Figure 2.1.3.1 of ANSI/HI 2.1-
2.2-2014.
---------------------------------------------------------------------------
RSV: 3 stages; and
VTS: 9 stages.
If a model is not available with that specific number of stages,
the model would be tested with the next closest number of stages
distributed in commerce by the manufacturer, or the next higher number
of stages if both the next lower and next higher number of stages are
equivalently close to the required number of stages. This is consistent
with DOE's proposal, discussed previously in section III.A.1.c, that
variation in number of stages for RSV and VTS pumps would not be a
characteristic that constitutes different basic models. 80 FR 17586,
17610 (April 1, 2015).
In response to DOE's proposal regarding testing of multi-stage RSV
and VTS pumps, HI commented that it agrees with this proposal. (HI, No.
8 at p. 18) DOE received no other comments on this proposal and has,
therefore, adopted the provisions for testing multi-stage RSV and VTS
pumps proposed in the April 2015 pumps test procedure NOPR with no
modifications.
Twin Head Pumps
A twin head pump is a type of IL pump that contains two impeller
assemblies, mounted in two volutes that share a single inlet and
discharge in a common casing. In response to the April 2015 pumps test
procedure NOPR, DOE received comment from HI recommending that DOE
include twin head pumps in this rulemaking and align their test
procedure with Europump guidelines.\59\ (HI, No. 8 at p. 3) These
guidelines recommend testing a twin head pump by incorporating one
[[Page 4116]]
of the impeller assemblies into an adequate IL type pump casing.
---------------------------------------------------------------------------
\59\ Guideline on the application of COMMISSION REGULATION (EU)
No 547/2012 implementing Directive 2009/125/EC of the European
Parliament and of the Council with regard to ecodesign requirements
for water pumps (12th of September 2012)).
---------------------------------------------------------------------------
DOE agrees with HI's recommendation and, as discussed in section
III.A.2.a, originally intended to include these pumps as a category of
IL pumps. To clarify DOE's original intent in this final rule, DOE is
adopting a definition of twin head pump, specifying that twin head
pumps are a subset of the IL pump equipment category, and modifying the
test procedure in this final rule to be consistent with the EU
guidelines. DOE's definition for twin head pump and the modified IL
definition are presented in section III.A.2.a. However, DOE also
acknowledges that clarifications to the test procedure proposed in the
April 2015 pumps test procedure NOPR are necessary to explicitly
specify the procedures for testing twin head pumps in accordance with
the DOE test procedure. As such, DOE is establishing explicit
instructions for configuring twin head pumps in this final rule.
In general, twin head pumps, as a subset of IL pumps, are tested in
accordance with the test procedure for IL pumps. Specifically, twin
head pumps, which are essentially two IL pumps packaged together in a
single casing, are to be tested using an equivalent single-head IL
configuration. That is, to test a twin head pump, one of the two
impeller assemblies is to be incorporated into an adequate, IL style,
single impeller volute and casing. An adequate, IL style, single
impeller volute and casing means a volute and casing for which any
physical and functional characteristics that affect energy consumption
and energy efficiency are essentially identical to their corresponding
characteristics for a single impeller in the twin head pump volute and
casing.
d. Determination of Pump Shaft Input Power at Specified Flow Rates
HI 40.6-2014 provides a specific procedure for determining BEP for
a given pump based on seven load points at 40, 60, 75, 90, 100, 110 and
120 percent of the expected BEP flow of the pump. The test protocol in
section 40.6.6.2 of HI 40.6-2014 requires that the hydraulic power and
the pump shaft input power, or input power to the motor for pumps
tested using the testing-based methods, be measured at each of the
seven load points. HI 40.6-2014 further specifies that the pump
efficiency be determined as the hydraulic power divided by the shaft
input power, or as the hydraulic power divided by the product of the
measured input power to the motor and the known efficiency of a
calibrated motor, depending on how the pump is tested. The equations
for calculating pump efficiency are shown in equation (12):
[GRAPHIC] [TIFF OMITTED] TR25JA16.064
Where:
[eta]pump,i = pump efficiency at load point i (%);
Pu,i = pump hydraulic output power at load point i (hp);
Pi = pump shaft input power at load point i (hp);
Pi\in,m\ = measured driver power input to the calibrated
motor at load point i (hp);
[eta]motor,i = the calibrated motor efficiency \60\ at
load point i (%); and
---------------------------------------------------------------------------
\60\ Note: to determine pump shaft input power based on the
measured driver input power, a calibrated motor and the calibrated
motor efficiencies at each load point i must be used where they are
known with ``sufficient accuracy,'' meaning that the efficiency of
the motor combined with the power measurement device uncertainty
must not exceed 2.5 percent, as required by Table
40.6.3.2.3 in HI 40.6-2014.
---------------------------------------------------------------------------
i = load point corresponding to 40, 60, 75, 90, 100, 110 or 120
percent of expected BEP flow.
The pump efficiency at each of these load points is then used to
determine the tested BEP for a given pump and, in particular, the flow
rate associated with the BEP of the pump (i.e., BEP flow). Then, based
on the determined BEP flow, the pump shaft input power or input power
to the motor is determined at each of the specified load points, as
discussed in section III.B.
In the April 2015 pumps test procedure NOPR, DOE observed that the
specific load points measured in the test protocol may not be exactly
at 75, 100, or 110 percent of the BEP flow load points specified in the
test procedure and, thus, the relevant power input measurements--
specifically, pump shaft input power, input power to the pump at the
driver, or input power to the continuous or non-continuous controls--
must be adjusted to reflect the power input at the specific load points
specified in the test procedure. To adjust the measured power input
values, DOE proposed that the measured input power and flow data
corresponding to the load point from 60 percent of expected BEP flow to
120 percent of expected BEP flow be linearly regressed and the input
power at the specific load point of 75, 100, and 110 percent of BEP
flow be determined from that regression equation. 80 FR 17586, 17610-11
(April 1, 2015).
In response to the April 2015 pumps test procedure NOPR, HI
commented that it agrees with DOE's proposal to use a linear regression
of the pump input power with respect to flow rate at all the tested
load points greater than or equal to 60 percent of expected BEP flow to
determine the pump shaft input power at the specified load points of
75, 100, and 110 percent of BEP flow. (HI, No. 8 at p. 18) DOE received
no other comments on the proposal and, as such, is adopting it as
proposed in the April 2015 pump test procedure NOPR with no revisions
or modifications.
Determination of Pump Shaft Input Power for Pumps With BEP at the
Maximum Allowable Flow
HI 40.6-2014 contains a method for determining the BEP of tested
pumps based on the flow rate at which the maximum pump efficiency
occurs. DOE recognizes that there may be some unique pump models that
do not exhibit the typical parabolic relationship of pump efficiency to
flow rate. Instead, for some pumps, pump efficiency will continue to
increase as a function of flow until reaching the maximum allowable
flow that can be developed without damaging the pump, also referred to
as ``pump run-out.'' Similarly, the expected BEP of some pumps may be
only slightly below the maximum allowable flow. For such pumps, it may
not be possible to use the procedure described in HI 40.6-2014 to
determine the BEP, since the pump cannot safely operate at flows of 110
and/or 120 percent of the expected BEP of the pump. In such cases, DOE
proposed in the April 2015 pumps test procedure NOPR that the seven
flow points for determination of BEP should be 40, 50, 60, 70, 80, 90,
and 100 percent of the expected maximum allowable flow rate of the pump
instead of the seven flow points described in section 40.6.5.5.1 of HI
40.6-2014. In addition, in such cases, DOE proposed that the specified
constant load flow points should be 100, 90, and 65 percent
[[Page 4117]]
of the BEP flow rate. 80 FR 17586, 17611 (April 1, 2015).
In response, HI commented that it disagreed with this proposal
because in order to determine the location of the BEP, testing must
occur at rates of flow greater than 100 percent of expected BEP flow.
(HI, No. 8, p. 18) DOE notes that the proposal in the April 2015 pumps
test procedure NOPR is specified with respect to the expected maximum
allowable flow rate, or the expected BEP, of the pump, not the measured
BEP flow. That is, under the NOPR proposal, pumps with the expected BEP
occurring at the maximum allowable flow, as defined in ANSI/HI 1.1-1.2-
2014, would be tested at the alternative load points specified in test
procedure for pumps with BEP at run-out.
DOE acknowledges that pump manufacturers must have some knowledge
of the expected operational characteristics of their pump, including
the expected BEP and expected maximum allowable flow, in order to
determine the appropriate load points for determining BEP. However, DOE
notes that this is the case for all pumps, not just pumps with BEP at
run-out. That is, the specific load points used to determine BEP for
all pumps are specified with respect to the expected operating
characteristics of the pump (i.e., BEP flow rate, as specified in
section 40.6.5.5.1 of HI 40.6-2014, or maximum allowable flow for pumps
with BEP at run-out). DOE believes this is necessary since the BEP and
flow characteristics of different load points could vary widely and it
is important that the data captured during the test procedure
effectively and fully characterize the performance of the pump over the
pump's operating ranges. DOE also understands that significant design,
engineering, and modeling are involved with creating pump models for
specific applications and design parameters and, as such, DOE finds it
unlikely that the BEP of a pump will occur at or near a pump's maximum
allowable flow without the pump manufacturer having some expectation
that this will occur based on the inherent design characteristics of
the pump. As such, DOE believes that the proposed test procedure for
pumps with BEP at or near run-out is consistent with the HI 40.6-2014
industry test protocols and appropriate for determining the performance
of such pumps and no additional changes are necessary. DOE also notes
that the maximum efficiency point (or BEP), in the case of pumps with
BEP at the maximum allowable flow rate will occur at the maximum flow
rate tested and will not be a parabolic maxima, as is the case for most
pumps.
DOE notes that, in the April 2015 NOPR, DOE referred to pumps with
BEP at run-out as corresponding to those with their expected BEP at the
expected maximum allowable flow. DOE recognizes that pumps with their
maximum allowable flow occurring between 100 and 120 percent of BEP
flow would also not be able to be tested in accordance with the
proposed test procedure, as not all of the load points specified in the
procedure could be measured in accordance with the test procedure. As
such, DOE is adopting, in this final rule, the proposal described in
the April 2015 pumps test procedure NOPR, except that DOE is clarifying
that pumps with maximum allowable flow occurring between 100 and 120 of
BEP flow also qualify as pumps with BEP at run-out and must apply the
appropriate test procedure. To ensure that the DOE test procedure is
consistent and adequately captures the range of flow rates with which
the pump is expected to operate, DOE is maintaining in this final rule
that load points for determination of BEP are specified with respect to
the expected maximum allowable flow of the pump, for pumps with the
expected BEP within 20 percent of the expected maximum allowable flow.
In the final rule, DOE is also clarifying the specific load points that
must be used in determining pump or driver input power in accordance
with the procedure described in section III.C.2.d.
e. Measurement Equipment for Testing-Based Methods
In the April 2015 pumps test procedure NOPR, DOE noted that HI
40.6-2014 does not contain all the necessary methods and calculations
to determine pump power consumption for the range of equipment that
will be addressed by this final rule (i.e., pumps inclusive of motors
and continuous or non-continuous controls). For the purposes of
determining most quantities relevant to the determination of
PEICL or PEIVL for pumps rated using the
calculation-based methods, DOE proposed to incorporate by reference HI
40.6-2014, appendix C, which specifies the required instrumentation to
measure head, speed, flow rate, torque, temperature, and electrical
input power to the motor. However, DOE noted that, for the purposes of
measuring input power to the driver for pumps sold with a motor and
continuous or non-continuous controls rated using the testing-based
method, the equipment specified in section C.4.3.1, ``electric power
input to the motor,'' of HI 40.6-2014 may not be sufficient. Based on
the specifications in CSA C838-13 and AHRI 1210-2011, since these test
standards are the most relevant references for measuring input power to
such controls, DOE proposed that electrical measurements for
determining VSD efficiency be taken using equipment capable of
measuring current, voltage, and real power up to at least the 40th
harmonic of fundamental supply source frequency \61\ and have an
accuracy level of 0.2 percent of full scale when measured
at the fundamental supply source frequency. 80 FR 17586, 17611-12
(April 1, 2015).
---------------------------------------------------------------------------
\61\ CSA C838-13 requires measurement up to the 50th harmonic.
However, DOE believes that measurement up to the 40th harmonic is
sufficient, and the difference between the two types of frequency
measurement equipment will not be appreciable.
---------------------------------------------------------------------------
DOE requested comment on the type and accuracy of required
measurement equipment, especially the equipment required for electrical
power measurements for pumps sold with motors having continuous or non-
continuous controls. AHRI commented that AHRI 1210-2011 specifies
appropriate power supply tolerances so that both pump manufacturers and
DOE enforcement testing can be confident with the establishment and
verification of ratings of VFDs sold with pumps. (AHRI, No. 11 at pp.
1-2) AHRI also indicated that any harmonics in the power system can
affect the measured performance of the pump when tested with a motor or
motor and continuous or non-continuous control. In addition, AHRI
notified DOE that VFD manufacturers are working to expand the scope of
AHRI 1210-2011 to include a higher horsepower upper limit and to
include additional load points.
HI commented that it disagrees with the requirements in AHRI 1210-
2011 and CSA C838-13, asserting that they were not agreed to by the CIP
Working Group and would be excessively burdensome. (HI, No. 8 at pp.
18-19) HI also indicated that pump manufacturers do not have the same
equipment as motor and drive test laboratories and should not be
expected to have the same level of instrumentation. HI recommended that
DOE instead require the 2.0 percent maximum permissible
measurement device uncertainty specified in Table 40.6.3.2.3 of HI
40.6-2014 for driver input power.
In response to HI's concerns regarding the burden of such
additional instrumentation, DOE notes that, in the April 2015 pumps
test procedure NOPR proposal, such sophisticated electric measurement
equipment was only proposed to be required for the
[[Page 4118]]
measurement of input power to the continuous or non-continuous control
when rating the pump under the testing-based methods. For other pump
configurations and when testing a pump using the calculation-based
methods, the electrical measurement equipment specified in HI 40.6-2014
section C.4.3.1 of appendix C would apply. DOE also notes that several
interested parties, including HI, previously commented that such
measurement equipment was necessary due to the potential impact of the
continuous control on line harmonics and other equipment on the
circuit. (Docket No. EERE-2011-BT-STD-0031, CA IOUs, Framework public
meeting transcript No. 19 at p. 236; Docket No. EERE-2011-BT-STD-0031,
HI, No. 25 at p. 35) HI also previously noted that this additional
instrumentation is manageable and within the capabilities of what most
of the HI members are doing today. (Docket No. EERE-2011-BT-STD-0031;
HI, public meeting transcript, No. 19 at p. 235)
In addition, given the power conditioning requirements adopted in
section III.C.2.c, DOE believes that the more sophisticated electrical
measurement equipment capable of measuring true root mean square (RMS)
voltage, true RMS current, and real power for distorted waveforms is
required to ensure that the incoming power is within the specifications
for those pump configurations where it is required and that the power
measurement is accurate. Specifically, DOE is requiring, as discussed
at length in section III.C.2.c, certain voltage, frequency, voltage
unbalance, and voltage THD levels be maintained when testing: (1) Bare
pumps using a calibrated motor, (2) pumps sold with motors using the
testing-based methods, and (3) pumps sold with motors and continuous or
non-continuous controls using the testing-based method. In order to
verify that these requirements are met, measurement equipment must be
capable of accurately measuring real power, true RMS voltage,
frequency, voltage unbalance, and voltage THD. DOE notes that, in
section C.4.3, HI 40.6 specifies that driver input power to the motor
should be calculated as the product of (1) line volts, (2) line amps,
and (3) power factor. As HI 40.6-2014 specifies the measurement of
power factor, DOE believes that the electric equipment capable of
measuring at least real power, true RMS voltage, and true RMS current
is already required by HI 40.6-2014, as such measurements are necessary
for determining power factor.
Some watt meters and watt-hour meters would not be sufficient for
accurate measurement of real power for distorted voltage waveforms or
distorted current waveforms; this is because such instruments
incorrectly assume that the waveforms are perfectly sinusoidal (i.e.,
free of the harmonics that are introduced by non-linear loads).\62\ DOE
is therefore requiring the use of instruments that accurately measure
true RMS current, true RMS voltage, and real power for distorted
waveforms with harmonic frequencies ranging from the fundamental
frequency (60 Hz) up to and including the 40th harmonic (2400 Hz).
---------------------------------------------------------------------------
\62\ PG&E, ``Voltage and Current Measurement of Non-Sinusoidal
AC Power'' (October 2004, http://www.pge.com/includes/docs/pdfs/mybusiness/customerservice/energystatus/powerquality/nonsinusoidal_power.pdf, accessed September 8, 2015).
---------------------------------------------------------------------------
However, with respect to the required accuracy of any electrical
measurement equipment, DOE acknowledges the concern from HI regarding
the additional burden associated with acquiring instrumentation
consistent with the specifications provided in the NOPR. As such, DOE
reviewed available and applicable test methods for motors and controls,
including AHRI 1210-2011 and CSA C838-13. DOE notes that AHRI 1210-2011
in turn references IEC 61000-4-7, ``Testing and measurement
techniques--General guide on harmonics and interharmonics measurements
and instrumentation, for power supply systems and equipment connected
thereto,'' regarding the necessary characteristics for electric
measurement equipment. IEC 61000-4-7 provides requirements for Class I
instruments and recommends their use where precise measurements are
necessary, such as for verifying compliance with standards. The maximum
error on power for IEC Class I instruments is 1 percent of
measured value for readings greater than or equal to 150 W (0.2 hp).
However, IEC 61000-4-7 states that the error limits refer to single-
frequency (i.e., sinusoidal) steady-state waveforms, in the operating
frequency range, applied to the instrument under rated operating
conditions to be indicated by the manufacturer.
The requirements in IEC 61000-4-7 generally align with those in
section 5.7.3 of CSA C390-10, which specifies that motor input power
measurements shall have a maximum uncertainty of 1.0
percent of the reading (including all errors from the power meter,
current transformers, and potential/voltage transformers). However, CSA
also states that the specified uncertainties shall apply only at the
rated full load (i.e., near rated power factor) of the motor under
test. While both IEC 61000-4-7 and CSA C390-10 recommend instrument
tolerances of 1.0 percent, DOE notes that their application
of that tolerance is not the same as the tolerance DOE is adopting in
this final rule, which applies to the measured power at each test point
and with the power supply characteristics experienced during the test.
DOE recognizes that the accuracy of input power measurements can be
compromised to some extent when voltage and/or current waveforms are
displaced and/or distorted. In addition, DOE recognizes that motors
will not always be fully loaded during pump testing, that motors may be
operated somewhat above nameplate voltage (as allowed in this final
rule), and that some distortion of the voltage waveform is permitted in
this final rule. Therefore, DOE believes it is appropriate to allow
electrical equipment accuracy of 2.0 percent of measured
value, consistent with the tolerance specified in section 40.6.3.2.3 of
HI 40.6-2014 and HI's request. DOE is adopting such a requirement in
this final rule.
DOE also recognizes that current and voltage instrument
transformers can be used in conjunction with electrical measurement
equipment to measure current and voltage. Usage of instrument
transformers can introduce additional losses and errors to the
measurement system. DOE is clarifying in this final rule that the
combined accuracy of all instruments used to measure a parameter must
meet the prescribed accuracy requirements for electrical measurement
equipment. Section C.4.1 of AHRI 1210-2011 indicates that combined
accuracy should be calculated by multiplying the accuracies of
individual instruments. In contrast, section 5.7.2 of CSA C838-2013
indicates that if all components of the power measuring system cannot
be calibrated together as a system, the total error shall be calculated
from the square root of the sum of the squares of all the errors. DOE
understands that it is more accurate to combine independent accuracies
(i.e., uncertainties or errors) by summing them in quadrature.\63\ DOE
is therefore using the root sum of squares to calculate the combined
accuracy of multiple instruments used in a single measurement,
consistent with conventional error propagation methods.
---------------------------------------------------------------------------
\63\ National Institute of Standards and Technology (NIST)
Guidelines for Evaluating and Expressing the Uncertainty of NIST
Measurement Results (http://physics.nist.gov/Pubs/guidelines/sec5.html, accessed September 8, 2015).
---------------------------------------------------------------------------
Therefore, in this final rule, DOE is specifying the
characteristics of the
[[Page 4119]]
electrical measurement equipment that must be used when measuring input
power to the motor, continuous controls, or non-continuous controls.
Specifically, the electrical measurement equipment in such cases must
be capable of measuring true RMS current, true RMS voltage, and real
power up to at least the 40th harmonic of fundamental supply source
frequency and have an accuracy level of 2.0 percent of the
measured value when measured at the fundamental supply source
frequency. DOE notes that standard electrical measurement equipment
meeting the requirements of HI 40.6-2014 section C.4.3.1 may still be
used when testing any pumps under the calculation-based methods (i.e.,
bare pumps, pump sold with motors, and pumps sold with motors and
continuous or non-continuous controls), provided a calibrated motor is
not used to determine the pump shaft input power. The electrical
measurement equipment requirements being adopted in this pumps test
procedure final rule are summarized in Table III.5.
Table III.5--Electrical Measurement Requirements for Different
Configurations of Pumps for the Calculation Based and Testing Based
Approaches
------------------------------------------------------------------------
Electrical measurement requirements
-------------------------------------------
Testing-based test
Pump configuration Calculation-based method or
test method without Calculation-based
a calibrated motor test method with a
calibrated motor
------------------------------------------------------------------------
Bare Pump................... HI 40.6-2014, Not Applicable.
section C.4.3.1,
unless testing with
a calibrated motor.
Pump + Motor or Pump + Motor HI 40.6-2014, Equipment capable of
+ Continuous or Non- section C.4.3.1, measuring true RMS
Continuous Controls. unless testing with current, true RMS
a calibrated motor. voltage, and real
power up to at
least the 40th
harmonic of
fundamental supply
source frequency
and have an
accuracy level of
2.0
percent of the
measured value when
measured at the
fundamental supply
source frequency.
------------------------------------------------------------------------
While DOE acknowledges that these requirements may represent a
burden for some manufacturers and test labs who do not already have
such equipment, DOE has minimized the additional burden associated with
this requirement, to the extent possible, by only requiring more
sophisticated power measurement equipment in those cases where it is
necessary to verify that the test procedure power conditioning
requirements are being met. DOE also notes that, for many pumps, the
testing-based approaches are optional and a manufacturer could elect to
determine the PEI using the calculation-based approach and avoid having
to purchase and use the more accurate and expensive electrical
measurement equipment necessary for conducting testing under the
testing-based approach. The burden associated with this test procedure,
and in particular the required test equipment, is discussed further in
section IV.B.
f. Calculations and Rounding
DOE notes HI 40.6-2014 does not specify how to round values for
calculation and reporting purposes. DOE recognizes that the manner in
which values are rounded can affect the resulting PER or PEI, and all
PER or PEI values should be reported with the same number of
significant digits. In the April 2015 pumps test procedure NOPR, DOE
proposed to require that all calculations be performed with the raw
measured data, to ensure accuracy, and that the PERCL and
PEICL or PERVL and PEIVL be reported
to the nearest 0.01. 80 FR 17586, 17612 (April 1, 2015).
DOE requested comment on its proposal to conduct all calculations
using raw measured values and that the PERCL and
PEICL or PERVL and PEIVL, as
applicable, be reported to the nearest 0.01. In response, HI commented
that it understands and agrees that the requirement is to normalize raw
data to nominal speed, and the PERCL, PEICL,
PERVL and PEIVL would be reported to the nearest
0.01. (HI, No. 8 at p. 19) In the April 2015 NOPR public meeting, a
representative of HI (Paul Ruzicka) suggested that DOE clarify that
calculations be performed with ``raw normalized data,'' since all data
are to be corrected to nominal speed. (HI, NOPR public meeting
transcript, No. 7 at pp. 165-66)
DOE appreciates HI's confirmation of the proposed approach. In
response to HI's suggestion that DOE clarify that all calculations are
to be performed with ``raw normalized data,'' DOE notes that the
normalization to nominal speed is also a calculation and that such
calculation is also to be performed with raw measured data. Also, some
collected data do not need to be normalized to nominal speed. As such,
DOE finds it clearer to continue to specify that all calculations be
performed with raw measured data, including the normalization to
nominal speed.
In addition, in preparing the final rule test procedure provisions,
DOE reviewed the calculations, uncertainty, and significance of
measured values used to determine the PERCL and
PEICL or PERVL and PEIVL, as
applicable. Based on this analysis, DOE determined that while
PEICL and PEIVL are to be reported to 0.01, the
precision of the measurement equipment specified in the NOPR is not
sufficient to determine PERCL and PERVL to 0.01,
especially for large pumps. As such, in this final rule, DOE is
continuing to specify that all calculations be performed with the raw
measured data, to ensure accuracy, and that the PEICL and
PEIVL be reported to the nearest 0.01. However, DOE is
specifying, in this final rule, that PERCL and
PERVL need only be specified to three significant digits,
which is equivalent to or better than the level of significance
specified for PEICL and PEIVL. DOE also agrees
with HI that all data should be corrected to nominal speed prior to
performing subsequent calculations, as described in section III.C.2.c.
D. Determination of Motor Efficiency
The PEICL and PEIVL metrics both describe the
performance of a pump and an accompanying motor, including continuous
or non-continuous controls, if applicable. As such, the performance of
the applicable motor must be determined to calculate the
PEICL or PEIVL of a given pump model.
[[Page 4120]]
In the April 2015 pumps test procedure NOPR, DOE proposed that the
motor efficiency would be determined based on the configuration in
which the pump was sold. For determining the default motor efficiency
of a minimally compliant pump (PERSTD) and for determining
the default motor efficiency used to calculate PERCL for
bare pumps, DOE proposed to specify the nominal full load motor
efficiency that corresponds to the applicable Federal minimum standard.
For determining PERCL or PERVL for pumps sold
with motors or with motors and continuous or non-continuous controls,
DOE proposed to use either (1) the physically tested performance of the
motor paired with that pump when using testing-based methods, or (2)
the represented nominal full load motor efficiency (i.e., the nameplate
and certified rating) of the motor (other than submersible) distributed
in commerce with that pump model when using the calculation-based test
method. 80 FR 17586, 17612-13 (April 1, 2015). The specific procedures
for determining the applicable Federal minimum and represented nominal
full load motor efficiency values are described in section III.D.1 and
III.D.2, respectively.
Based on DOE's proposed test procedure, the applicable Federal
minimum or the represented nominal full load motor efficiency would
then be used to determine the full load losses, in horsepower,
associated with that motor. The full load losses would then be adjusted
using an algorithm to reflect the motor performance at partial loads,
corresponding to the load points specified in the DOE test. These
losses would then be combined with the measured pump shaft input power
at each load point to determine the PERCL or
PERVL for that pump, as described in section III.B. Id.
Section III.E.1 describes how the Federal minimum or represented
nominal full load motor efficiency is used in the calculation-based
method when calculating overall pump power consumption.
1. Default Nominal Full Load Motor Efficiency
For determining the default motor efficiency of a minimally
compliant pump (PERSTD) and for determining the default
motor efficiency used to calculate PERCL for bare pumps, DOE
proposed to specify the nominal full load motor efficiency that
corresponds to the applicable Federal minimum standard. In the April
2015 pumps test procedure NOPR, DOE proposed that the ``default''
nominal full load motor efficiency values be based on the minimum
nominal full load motor efficiency standards for polyphase, NEMA Design
B motors from 1 to 500 hp, defined in 10 CFR part 431, subpart B for
medium and large electric motors, except for submersible motors.
Specifically, at the time of the proposal, the values in Table 5 of 10
CFR 431.25(h) defined the nominal full load motor efficiency standards,
by number of poles and horsepower for the applicable motors. 80 FR
17586, 17612-13 (April 1, 2015). DOE is using the term ``default
nominal full load efficiency'' throughout this document to refer to the
default values used in this test procedure for determining
PERSTD and for bare pumps, PERCL corresponding to
the applicable Federal minimum energy conservation standards. See
section III.D.1.a for a discussion regarding electric motors covered by
DOE's energy conservation standards at 10 CFR 431.25 and section
III.D.1.b for a discussion regarding submersible motors.
a. Covered Electric Motors
For the determination of PERSTD for all pumps (except ST
pumps) and PERCL for bare pumps (see section III.E.1.a),
default nominal full load motor efficiency values are required. As
mentioned previously, DOE believes the nominal full load motor
efficiency standards specified for NEMA Design B motors are appropriate
for the pumps (except ST pumps) to which this test procedure is
applicable. In the April 2015 pumps test procedure NOPR, DOE also
proposed to specify the selection of the default motor characteristics
used for calculating PERCL and PERSTD based on
the configuration in which the pump is being sold. Specifically, for
bare pumps, DOE proposed that the default nominal full load motor
efficiency for determining PERCL and PERSTD would
be based on the following criteria:
The number of poles selected for the default motor would
be equivalent to the nominal speed of the rated pump (i.e., 2 poles
correspond to 3,600 rpm and 4 poles correspond to 1,800 rpm);
the motor horsepower selected for a given pump would be
required to be either equivalent to, or the next highest horsepower-
rated level greater than, the measured pump shaft input power at 120
percent of BEP flow, as determined based on an extrapolation of the
linear regression of pump input power (discussed in section III.C.2.d);
and
the lower standard (i.e., less stringent) of either the
open or enclosed construction at the appropriate motor horsepower and
number of poles. 80 FR 17586, 17612-13 (April 1, 2015).
As mentioned previously, the appropriate table at 10 CFR 431.25 is
the table of nominal full load motor efficiency standards that is
currently required for compliance of NEMA Design B polyphase motors.
For pumps sold either with motors or with motors and continuous or
non-continuous controls, selection of a default nominal full load motor
efficiency for calculation of PERSTD is also required. This
default nominal full load motor efficiency is also based on the
applicable Federal minimum standards. In this case, DOE proposed that
the motor horsepower and number of poles selected for determining the
default nominal full load motor efficiency for use in the calculation
of PERSTD should be equivalent to the horsepower and poles
of the motor with which the pump model is distributed in commerce.
Similar to the case for bare pumps, DOE also proposed that the default
nominal full load motor efficiency corresponding to the minimally
compliant motor in PERSTD would still be the minimum of the
open and enclosed standards for the appropriate motor horsepower and
number of poles. That is, regardless of the motor construction (i.e.,
open or enclosed) of the motor with which the pump is being rated, the
minimum nominal full load motor efficiency standard listed in the
applicable table for polyphase NEMA Design B motors at 10 CFR 431.25
for the given motor horsepower and number of poles would be used. Id.
DOE requested comment on its proposal to determine the default
motor horsepower for rating bare pumps based on the pump shaft input
power at 120 percent of BEP flow and, in response, HI commented that it
agrees with this proposal. (HI, No. 8 at p. 19) DOE also requested
comment on its proposal to specify the default nominal full load motor
efficiency based on the applicable minimally allowed nominal full load
motor efficiency specified in DOE's energy conservation standards for
NEMA Design B motors at 10 CFR 431.25 for all pumps except pumps sold
with submersible motors. HI commented that each NEMA MG 1 nominal
efficiency value is the average efficiency of a large population of
motors of the same design, so for any given nominal efficiency value,
half of the corresponding population would be lower. (HI, No. 8 at p.
19) HI indicated that the NEMA MG 1 minimum efficiency values should be
used instead so that the test method for determining PEICL
and PEIVL are not disadvantaged. Wilo similarly commented
that the use of NEMA nominal efficiencies would cause 50 percent of
borderline pumps to
[[Page 4121]]
fail. (Wilo, Docket No. EERE-2011-BT-STD-0031, No. 44 at p. 2)
DOE acknowledges the comments from HI and Wilo regarding the use of
nominal full load motor efficiency values from 10 CFR 431.25. DOE notes
that these values represent the minimum Federal efficiency standard for
applicable covered motors and, as such, believes that referencing an
alternative, lower efficiency value would be inappropriate and
inconsistent with DOE's regulatory framework. However, in response to
the specific concern voiced regarding a potential disadvantage when
using the testing-based method, DOE will follow the method the
manufacturer used to determine the representative value when conducting
enforcement testing. In other words, if a pump manufacturer has used
the calculation-based rating method to determine the representative
value for a pump basic model, then DOE would also use the calculation-
based approach, which relies on the nominal full load motor efficiency
values from the table and not the actual motor tested performance.
Conversely, if a manufacturer elected to use the testing-based
approach, DOE would also assess compliance using the testing-based
approach which would account for the actual tested efficiency of the
motor incorporated into the pump. Thus, a manufacturer need not be
concerned that the actual efficiency of an individual motor would have
a disparate effect on the measured efficiency during assessment or
enforcement testing.
In this final rule, DOE is adopting the default nominal full load
motor efficiency values for bare pumps and the method for determining
PERSTD proposed in the April 2015 pumps test procedure NOPR.
That is, the default nominal full load motor efficiency for bare pumps
and for determining PERSTD for all pumps (besides VTS pumps)
is determined by referencing the applicable energy conservation
standards found at 10 CFR 431.25 for NEMA Design B motors that are
required at the time the pump model is being certified. At the time of
publication of this document, the appropriate motor Federal energy
conservation standards for NEMA Design B polyphase motors can be found
at 10 CFR 431.25(h).
DOE notes that, if DOE were to amend the energy conservation
standards for NEMA Design B polyphase motors, the represented values
for pump PEI would no longer remain valid, and manufacturers would need
to revise their represented values to reflect the amended nominal full
load motor efficiency standards and recertify at the first annual
certification date after the compliance date for the amended motor
Federal energy conservation standards. As a result of the methodology
being adopted today, which will result in changes to represented values
for pumps when the Federal energy conservation standards for NEMA
Design B polyphase motors changes, DOE does not believe that any actual
design or manufacturing changes will be required from the pump
manufacturer since the bare pump will remain the same and is unaffected
by the motor standard. Instead, DOE is ensuring that pump ratings still
reflect differential representations depending on the efficiency of the
motor that is being sold with the pump. DOE understands that certain
motors that were minimally compliant with the previous motor standard
may no longer be able to be sold once manufacturers are required to
comply with amended standards for motors (if adopted) and thus, DOE
believes a methodology which reflects this reality is best. Because the
PEI is an indexed value that is meant to compare the performance of the
pump being tested to that of a theoretical ``minimally-compliant''
pump, the default nominal full load motor efficiency for that
``minimally-compliant pump'' must reflect any changes in the motor
standard and available products in the market. If DOE did not adopt a
methodology that acknowledges potential changes to the energy
conservation standards for NEMA Design B motors, then pump represented
values could be artificially inflated when compliance with amended
energy conservation standards for motors is required and could result
in a situation where a compliant pump could be less efficient due to
the credit being given from the amended energy conservation standards
for motors.
For these reasons, DOE is specifying in the pumps test procedure
adopted in this final rule that when determining PERSTD for
all pumps (except VTS pumps) and PERCL for bare pumps, the
default nominal full load motor efficiency value that is used must be
the energy conservation standard for NEMA Design B polyphase motors
that is required at the time the pump model is being certified and must
be updated with an annual certification. As this amended default
nominal full load motor efficiency will occur in both the numerator and
the denominator of the PEI metric, such a test procedure provision will
not lead to changes in the relative ratings of bare pump models using
the calculation-based approach.
b. Submersible Motors
DOE notes that submersible motors are not currently subject to the
DOE energy conservation standards for electric motors specified at 10
CFR 431.25. Therefore, for the purposes of calculating PEICL
for bare VTS pumps or PERSTD for any pumps sold with
submersible motors, DOE requires a default assumption regarding full
load efficiency for submersible motors. In the April 2015 pumps test
procedure NOPR, DOE constructed a table of motor full load efficiencies
by motor horsepower, similar to the table of energy conservation
standards for electric motors at 10 CFR 431.25(h), as shown in Table
III.6. 80 FR 17586, 17614-15 (April 1, 2015).
As it was not DOE's intent to impact the rated efficiency of
submersible motors through this rulemaking, DOE deflated the minimum
submersible motor efficiency that DOE observed by using the maximum
number of ``bands'' across a horsepower range to ensure that the value
represented a worst-case value. Where no data were available, DOE
applied the same number of NEMA bands across the range of motor
horsepower and numbers of poles.
Table III.6--Two-Pole Motor Submersible Motor Full Load Efficiency by Motor Horsepower Relative to the Full Load
Efficiency in in Table 5 of 10 CFR 431.25(h)
----------------------------------------------------------------------------------------------------------------
Observed number Default number
Minimum observed of ``bands'' of ``bands''
full load below the full below the full
Motor horsepower (hp) efficiency (2- load efficiency load efficiency
poles) (%) in Table 5 of 10 in Table 5 of 10
CFR 431.25(h) CFR 431.25(h)
----------------------------------------------------------------------------------------------------------------
1...................................................... 67 6 11
1.5.................................................... 67 11 .................
[[Page 4122]]
2...................................................... 73 9 .................
3...................................................... 75 9 .................
5...................................................... 76 10 .................
7.5.................................................... 77 10 15
10..................................................... 75 13 .................
15..................................................... 72.2 15 .................
20..................................................... 76.4 13 .................
25..................................................... 79 12 .................
30..................................................... 79.9 12 12
40..................................................... 83 10 .................
50..................................................... 83 11 .................
60..................................................... 84 11 .................
75..................................................... 83.8 12 .................
100.................................................... 87 10 14
125.................................................... 86 13 .................
150.................................................... 86 13 .................
175.................................................... 88 12 .................
200.................................................... 87 14 .................
250.................................................... 87 14 .................
----------------------------------------------------------------------------------------------------------------
Id.
In response to the April 2015 pumps test procedure NOPR proposal,
HI commented in the public meeting that several of the minimum motor
efficiency values are higher than what is being published. (HI, NOPR
public meeting transcript, No. 7 at pp. 159-60). In written comments,
HI provided corrected efficiencies for several values. (HI, No. 8 at
pp. 19-20)
DOE thanks HI for submitting data to assist in constructing a
submersible motor efficiency table that is representative of minimally
efficient submersible motors. DOE has revised its proposed submersible
efficiency values to accommodate the lower values provided by HI, as
shown in Table III.7.
Table III.7--Revised Submersible Motor Full Load Efficiency by Motor Horsepower
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Minimum observed full load Observed number of ``bands'' Binned number of ``bands'' Resulting default nominal full
efficiency (%) below the full load efficiency below the full load efficiency load submersible motor
-------------------------------- in Table 5 of 10 CFR 431.25(h) for NEMA design B motors in efficiency
Motor horsepower (hp) -------------------------------- CFR 431.25 -------------------------------
2 poles 4 poles --------------------------------
2 poles 4 poles 2 poles 4 poles 2 poles 4 poles
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1............................................................... 67 .............. 6 .............. 11 11 55 68
1.5............................................................. 67 .............. 11 .............. .............. .............. 66 70
2............................................................... 73 .............. 9 .............. .............. .............. 68 70
3............................................................... 75 .............. 9 .............. .............. .............. 70 75.5
5............................................................... 76 .............. 10 .............. .............. .............. 74 75.5
7.5............................................................. 77 .............. 10 .............. 15 15 68 74
10.............................................................. 75 .............. 13 .............. .............. .............. 70 74
15.............................................................. 72.2 .............. 15 .............. .............. .............. 72 75.5
20.............................................................. 76.4 .............. 13 .............. .............. .............. 72 77
25.............................................................. 79 .............. 12 .............. .............. .............. 74 78.5
30.............................................................. 79.9 81.8 12 13 13 14 77 80
40.............................................................. 83 .............. 10 .............. .............. .............. 78.5 81.5
50.............................................................. 83 85.1 11 13 .............. .............. 80 82.5
60.............................................................. 82.4 85.4 13 14 .............. .............. 81.5 84
75.............................................................. 83.8 86.2 12 14 .............. .............. 81.5 85.5
100............................................................. 87 .............. 10 .............. 14 15 81.5 84
125............................................................. 86 .............. 13 .............. .............. .............. 84 84
150............................................................. 86 86.1 13 .............. .............. .............. 84 85.5
200............................................................. 87 .............. 13 15 .............. .............. 85.5 86.5
250............................................................. 87 .............. 14 .............. .............. .............. 86.5 86.5
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
During the April 2015 NOPR public meeting, Nidec Corporation
(Nidec) expressed that the levels of submersible motors should be
consistent with the requirements for vertical motors. Nidec also stated
that there be two sets of default efficiency values: one for a dry
rotor and one for a wet rotor. (Nidec, NOPR public meeting transcript,
No. 7 at pp. 160-61) Nidec added that the type with air could use Table
12-12 from NEMA MG 1. (Nidec, NOPR public meeting transcript, No. 7 at
p. 163)
In response to Nidec's comment, DOE notes that all equipment
categories that are subject to the test procedure, including VTS pumps
that are most commonly paired with submersible motors, are defined as
dry rotor pumps. As such, wet rotor submersible motors
[[Page 4123]]
and wet rotor submersible pumps are not subject to the test procedure,
and a table of minimum efficiency values for them is not necessary. DOE
notes that, in response to Nidec's comment regarding ``the type [of
motor] with air,'' DOE believes Nidec is referring to non-hermitically
sealed units (i.e., non-submersible motors) and confirming that Table
12-12 in NEMA MG-1 (which is consistent with DOE's minimum efficiency
standards for electric motors at 10 CFR 431.25) is appropriate for such
non-submersible motors. While DOE's application of the minimum
efficiency standards for electric motors in this final rule is limited
to NEMA Design B motors, DOE notes that NEMA's comment is consistent
with the approach being taken in this final rule.
HI stated that DOE needs to emphasize that single-phase motors are
not part of the minimum efficiency tables. (HI, No. 8 at pp. 19-21) DOE
notes that in this test procedure, as described in section III.A.6, all
pumps sold with single-phase motors, including single-phase submersible
motors, may be rated as bare pumps in order to not be penalized for the
inherently lower efficiencies of single-phase equipment. In the bare
pump approach, the default submersible motor efficiency values
presented in Table III.7 are used in calculating both the numerator
(PERCL or PERVL) and denominator
(PERSTD) of PEI; the lower efficiency of a single-phase
motor is not taken into account. DOE notes that, as described in
section III.A.6, pumps sold with single-phase submersible motors may
also apply the testing-based approach, if desired by the manufacturer.
However, in such a case, the default motor efficiency used to determine
PERSTD would continue to be the default nominal submersible
motor efficiency presented in Table III.7.
In regard to selection of default motor size for submersible
motors, in the April 2015 pumps test procedure NOPR, DOE proposed to
apply the same sizing method proposed for other categories of pumps,
described in section III.D.1 of this NOPR. At the April 2015 NOPR
public meeting, HI stated that submersible motors are sold utilizing
full NEMA motor service factors and recommended amending the
submersible motor sizing to account for this sizing approach. (HI, NOPR
public meeting transcript, No. 7 at p. 150) In its written comments, HI
noted that DOE needs to emphasize that submersible pumps are typically
loaded to the fully utilized service factor of the motor. (HI, No. 8 at
pp. 19-20)
In response to HI's suggestion, DOE has reviewed the typical
service factors of submersible motors offered for sale with pumps
within the scope of this test procedure. DOE determined that the
majority of submersible motors exhibited service factors of 1.15. DOE
notes that this value is also consistent with the service factor
prescribed in table 12-4 of NEMA MG-1 2009 for Design A, B, and C
polyphase, squirrel cage, general-purpose, alternating-current motors
of the open type with a motor horsepower greater than 1 hp. In light of
this, DOE is revising its requirements for the default motor sizing of
submersible motors in this final rule to reflect the service factors
observed in the industry. That is, DOE is specifying that, for VTS bare
pumps, the default submersible motor horsepower be determined as the
motor horsepower that is equal to or the next highest motor horsepower
greater than the pump shaft input power (in horsepower) at 120 percent
of BEP flow divided by the service factor, or 1.15. DOE notes that some
motors less than 3 horsepower may have a higher service factor, but by
using the same value for all pumps, DOE is simplifying the procedure
and does not expect this simplification to significantly impact the PEI
for VTS bare pumps. This is because the same service factor (1.15) is
used for the given pump's PERCL and for PERSTD,
so the two efficiency values essentially cancel out and do not
significantly impact the rating.
DOE reiterates that this default service factor is only necessary
for determining the default motor efficiency for submersible motors.
For pumps sold with submersible motors and pumps sold with submersible
motors and continuous or non-continuous controls, the actual
submersible motor size with which the pump is distributed in commerce
is used when determining motor efficiency for use in calculating
PERCL, PERVL, and PERSTD.
In summary, in this final rule, DOE will allow the use of default
nominal full load submersible motor efficiency values presented in
Table III.7 to rate (1) VTS bare pumps, (2) pumps sold with submersible
motors, and (3) pumps sold with submersible motors and continuous or
non-continuous controls as an option instead of using the testing-based
approach. DOE believes that allowing the calculation-based method to be
used for pumps sold with submersible motors may also reduce the testing
burden for some manufacturers. However, if manufacturers wish to
account for the use of submersible motors with a higher efficiency than
the default nominal full load submersible motor efficiency, they may
choose to rate the pump model using the testing-based, wire-to-water
method described in section III.E.2.
2. Represented Nominal Full Load Motor Efficiency for Pumps Sold With
Motors
For pumps sold with motors or motors and continuous or non-
continuous controls that are rated using the calculation-based
approach, DOE proposed in the April 2015 pumps test procedure NOPR that
the nominal full load motor efficiency used in determining the
PERCL or PERVL will be the value that is
certified to DOE as the nominal full load motor efficiency in
accordance with the standards and test procedures for electric motors
at 10 CFR 431, subpart B. 80 FR 17586, 17613-14 (April 1, 2015). As
noted in the April 2015 pumps test procedure NOPR and described in
greater detail in section III.E.1.b and III.E.2, this verifiable and
standardized represented nominal full load motor efficiency is only
available for motors that are subject to DOE's test procedure for
electric motors and, as such, DOE proposed in the April 2015 pump test
procedure NOPR, that only pumps sold with motors subject to DOE's
electric motor test procedure and energy conservation standards would
be able to conduct the proposed calculation-based approach. Id. at
17618, 17626-28. DOE notes that these represented nominal full load
efficiency values correspond to the certified value submitted on the
motor manufacturer's certification report and on the nameplate of the
motor itself. Therefore, if the motor manufacturer elects to certify
conservatively at the Federal energy conservation standard level, this
is the value the pump manufacturer must use in its calculations for
pumps sold with motors subject to DOE's Federal energy conservation
standards.
For pumps sold with submersible motors and rated using the
calculation-based approach, DOE also proposed that the nominal full
load motor efficiency values would be the same as the default nominal
full load submersible motor efficiency values used to determine the
PERCL for bare pumps and PERSTD. Id. at 17614.
These values are representative of minimally efficient submersible
motors and are discussed further in section III.D.1.b. As noted
previously, if manufacturers wish to represent the efficiency of pumps
sold with submersible motors that are more efficient than the assumed
value, then they may perform the testing-based method described in
section III.E.2.b in section.
[[Page 4124]]
DOE received no comments on these proposals and is adopting the
provisions for specifying the represented nominal full load motor
efficiency for motors subject to DOE's electric motor test procedure
and the default nominal full load submersible motor efficiency for
submersible motors, as proposed. DOE notes that, for pumps sold with
motors not addressed by DOE's electric motor test procedure (except
submersible motors), the calculation-based methods described in section
III.E.1.b would not apply, and no assumption regarding nominal
efficiency of the motor paired with the pump is permitted when
determining PERCL or PERVL. However, an
assumption regarding the default efficiency of the minimally compliant
motor that can be paired with a given pump would still be required to
calculate PERSTD. See Section III.D.1; 80 FR 17586, 17613-14
(April 1, 2015).
3. Determining Part Load Motor Losses
As described in section III.B.2, default nominal full load motor
efficiency is converted to motor losses, in horsepower, at each load
point to determine the input power to the motor when determining
PERSTD. This same approach is used to determine
PERCL under the calculation-based approach, which is
described in greater detail in section III.E.2.b. In the April 2015
pumps test procedure NOPR, DOE proposed to determine the part load
losses of the motor at each load point by applying an algorithm to the
full load losses of the motor. 80 FR 17615. Specifically, DOE proposed
to determine a part load loss factor (yi) at each load point
based on the following equation (13):
[GRAPHIC] [TIFF OMITTED] TR25JA16.010
Where:
yi = the part load loss factor at load point i,
Pi = the shaft input power to the bare pump at load point
i (hp),
MotorHP = the motor horsepower (hp), and
i = load point corresponding to 75, 100, or 110 percent of BEP flow
for uncontrolled pumps or 25, 50, 75, or 100 percent of BEP flow for
pumps sold with a motor and continuous or non-continuous controls.
Id.
In the proposal, the full load losses of the motor would be
determined based on the full load motor efficiency, which would be the
default nominal full load motor efficiency described in section III.D.1
for bare pumps and when determining PERSTD, or the
represented nominal full load motor efficiency described in section
III.D.2 for pumps sold with applicable motors. Specifically, DOE
proposed that the full load motor losses would be calculated as shown
in equation (14):
[GRAPHIC] [TIFF OMITTED] TR25JA16.011
Where:
Lfull\64\ = motor losses at full load (hp),
---------------------------------------------------------------------------
\64\ DOE notes that, in the April 2015 pumps test procedure
NOPR, DOE proposed to define this term using the nomenclature
Lfull,default and described it as equivalent to ``default
motor losses at full load.'' However, upon further review, DOE finds
this terminology confusing because this equation applies both to
pumps rated as bare pumps, for which a default nominal full load
motor efficiency applies, as well as pumps rated with motors and
pumps rated with motors and controls, for with the nominal full load
motor efficiency with which the pump is rated applies (not a default
value), depending on the context. Therefore, in this final rule, DOE
is updating the terminology to use the nomenclature Lfull
and describe the term as equivalent to ``motor losses at full
load,'' referencing the relevant procedure for determining full load
motor losses based on the pump configuration.
---------------------------------------------------------------------------
MotorHP = the motor horsepower (hp), and
[eta]motor,full = the default or rated nominal full load
motor efficiency as determined in accordance with section III.D.1 or
III.D.2, respectively (%).
Id.
Finally, DOE proposed that the part load losses at each specified
load point would be determined based on the product of the full load
losses and the part load loss factor at that load point, as shown in
equation (15):
[GRAPHIC] [TIFF OMITTED] TR25JA16.012
Where:
Li = motor losses at load point i (hp),
Lfull = motor losses at full load (hp),
yi = part load loss factor at load point i, and
i = load point corresponding to 75, 100, or 110 percent of BEP flow
for uncontrolled pumps or 25, 50, 75, or 100 percent of BEP flow for
pumps sold with a motor and continuous or non-continuous controls.
These calculated part load motor losses at each of the specified
load points would then be combined with the measured pump shaft input
power and weighted equally to calculate PERCL or
PERVL via the calculation-based approach and
PERSTD, as described in section III.E.1.b and III.B.2,
respectively. Id. at 17615-16.
DOE requested comment on the development and use of the motor part
load loss factor curves to describe part load performance of covered
motors and submersible motors, including the default motor specified in
section III.D.1 for bare pumps and calculation of PERSTD.
DOE received no comments on the proposal and, as such, is adopting the
proposed methodology presented in the April 2015 pumps test procedure
NOPR with no modification for pumps, except those sold with submersible
motors. DOE notes that, in making the change requested by interested
parties to account for service factor in sizing submersible motors (see
section III.D.1.b), DOE is making a slight modification to the part
load loss factors for VTS pumps to specify that where
[GRAPHIC] [TIFF OMITTED] TR25JA16.013
a value of 1.000 should be used as the part load loss factor.
This change is needed because the proposed part load loss curves
were not developed to be representative of
[[Page 4125]]
performance above the full load of the motor. This modification
implicitly assumes that the motor efficiency curve is flat between full
load and the service factor (i.e., 1.15). DOE expects the full load
losses of the motor to be more representative of the performance of
motors beyond full load operation than extending the curve, which would
assume that losses would decrease (efficiency would increase) above
full load. DOE has not made any other revisions to the part load loss
factors. DOE also notes that such is the case for all pumps; that is,
the ratio of pump shaft input power to motor horsepower should not
exceed a value of 1 for any pump. As such, to ensure that the part load
loss factor equation is not applied inappropriately, DOE is adding this
clarification as applicable to all pumps tested under the test
procedure.
E. Test Methods for Different Pump Configurations
As previously discussed, the PEICL and PEIVL
for a given pump is determined by first calculating the
PERCL or PERVL, as applicable, for the given
pump. For all pumps, the PERCL or PERVL is then
scaled based on a calculated PERSTD (i.e., the
PERCL of a pump that would minimally comply with the
applicable standard). (Docket No. EERE-2011-BT-STD-0031) The process
for determining the PERSTD is described in section III.B.2.
In the April 2015 pumps test procedure NOPR, DOE proposed that
different test methods for determining the PERCL and
PERVL of applicable pumps would apply based on the
configuration of the pump model and the characteristics of the motor
and controls it may be sold with. 80 FR 17586, 17616 (April 1, 2015).
For example, the available test method(s) for pumps sold alone (i.e.,
bare pumps) would be different than those for pumps sold with motors or
pumps sold with motors and continuous or non-continuous controls.
Further, the available test methods for pumps sold with motors that are
covered by DOE's energy conservation standards for electric motors at
10 CFR 431.25(g) (as established by the energy conservation standards
established in the May 2014 medium electric motor energy conservation
standard final rule (79 FR 30933 (May 29, 2014)) \65\ would be
different than the available test methods for pumps sold with motors
that are not covered by DOE's test procedure for electric motors.
Specifically, DOE proposed defining the applicability of the proposed
test methods based on the following:
---------------------------------------------------------------------------
\65\ DOE recognizes that the scope of the electric motor
standards at 10 CFR 431.25 may change in the future as a result of
potential future rulemakings. Since the scope of such future motors
standards is unknown, DOE wishes to clearly and unambiguously
establish the specific motors which, when sold with an applicable
bare pump, would be eligible to apply the calculation-based test
methods described in this section.
---------------------------------------------------------------------------
Two potential approaches: (1) Testing-based versus (2)
calculation-based;
three potential configurations: (1) Bare pumps, (2) pumps
sold with motors, and (3) pumps sold with motors and controls; and
two different sub-configuration criteria:
(1) Whether the pump was sold with: (a) a motor covered by DOE's
electric motor energy conservation standards, (b) a submersible motor,
(c) a motor that is not covered by DOE's electric motor energy
conservation standards and is not a submersible motor, or (d) no motor;
and
(2) whether the pump was sold with: (a) continuous controls, (b)
non-continuous controls, or (c) neither continuous or non-continuous
controls.
The applicability of DOE's proposed test methods to different
configurations of pumps is summarized in Table III.8. Id. at 17627.
Table III.8--Applicability of Calculation-Based and Testing-Based Test Procedure Options Based on Pump
Configuration
----------------------------------------------------------------------------------------------------------------
Calculation-based test Testing-based test
Pump configuration Pump sub-configuration method method
----------------------------------------------------------------------------------------------------------------
Bare Pump......................... Bare Pump................. A.1: Tested Pump Not Applicable.
Efficiency of Bare Pump +
Default Nominal Full Load
Motor Efficiency +
Default Motor Part Load
Loss Curve.
Pump + Motor...................... Pump + Motor Covered by B.1: Tested Pump B.2: Tested Wire-to-
DOE's Electric Motor Efficiency of Bare Pump + Water Performance.
Energy Conservation Represented Nominal Full
Standards OR Pump + Load Motor Efficiency for
Submersible Motor. Actual Motor Paired with
Pump + Default Motor Part
Load Loss Curve.
Pump + Motor Not Covered Not Applicable............ B.2: Tested Wire-to-
by DOE's Electric Motor Water Performance.
Energy Conservation
Standards (Except
Submersible Motors).
Pump + Motor + Speed Controls..... Pump + Motor Covered by C.1: Tested Pump C.2: Tested Wire-to-
DOE's Electric Motor Efficiency of Bare Pump + Water Performance.
Energy Conservation Represented Nominal Full
Standards + Continuous Load Motor Efficiency for
Control OR Pump + Actual Motor Paired with
Submersible Motor + Pump + Default Motor/
Continuous Control. Control Part Load Loss
Curve + Assumed System
Curve.
Pump + Motor Covered by Not Applicable............ C.2: Tested Wire-to-
DOE's Electric Motor Water Performance.
Energy Conservation
Standards + Non-
Continuous Control OR
Pump + Submersible Motor
+ Non-Continuous Control.
Pump + Motor Not Covered Not Applicable............ C.2: Tested Wire-to-
by DOE's Electric Motor Water Performance.
Energy Conservation
Standards (Except
Submersible Motors) +
Continuous or Non-
Continuous Controls.
----------------------------------------------------------------------------------------------------------------
[[Page 4126]]
DOE's proposed applicability of testing-based and calculation-based
test methods, as shown in Table III.8, was designed to maximize the
number of pumps that can be rated using the less burdensome
calculation-based methods A.1, B.1, and C.1. DOE also proposed the
applicability of the various test methods to maximize flexibility in
rating equipment. That is, where possible, DOE proposed to allow either
the calculation-based or the testing-based method to be used to
determine the PEI of applicable pump models. 80 FR 17627-28. In this
case, if a manufacturer wished to represent the improved performance of
a given pump, for example from a motor with improved part load
efficiency performance, and believed that the assumptions made in the
calculation method would not adequately represent the improved
performance of that pump, the manufacturer would be able to use the
testing-based methods to rate the PEICL or PEIVL
of that pump model to capture the improved performance of the pump as
tested.
DOE also noted that, since the measured performance of individual
units can vary from the average performance of the population or from
DOE's assumed values used in the calculation-based approach, it is
theoretically possible for the calculation-based approach to generate
ratings that are better or worse than the testing-based approach. To
address this possibility, DOE proposed that manufacturers report the
test method (i.e., calculation-based or testing-based) used to
determine the PEI for each model and that DOE would use the same method
used by the manufacturer to generate the rating when performing
assessment or enforcement testing. Id. at 17628.
DOE requested comment on its proposal to establish calculation-
based test methods as the required test method for bare pumps and
testing-based methods as the required test method for pumps sold with
motors that are not regulated by DOE's electric motor energy
conservation standards, except for submersible motors, or for pumps
sold with any motors and with non-continuous controls. DOE also
requested comment on the proposal to allow either testing-based methods
or calculation-based methods to be used to rate pumps sold with
continuous control-equipped motors that are either (1) regulated by
DOE's electric motor standards or (2) submersible motors. In addition,
DOE requested comment on the level of burden associated with reporting
the test method used by a manufacturer to certify a given pump basic
model as compliant with any energy conservation standards DOE may set.
HI commented that it agrees with these proposals, and that it is
not too burdensome to note the test method in the certification report,
as proposed in the April 2015 pumps test procedure NOPR. (HI, No. 8 at
p. 23) Wilo commented that the calculation-based test methods should be
eliminated entirely. Wilo indicated that one problem is that DOE is not
responsible for providing tools to determine compliance, so each
manufacturer will be responsible for creating its own potentially
erroneous evaluation tool. Wilo also indicated that a second problem is
that there are no standard efficiencies for VFDs, so a manufacturer
could use a minimally performing VFD to create a better performing PEI
value for a given pump sold with motor and controls. (Wilo, Docket No.
EERE-2011-BT-STD-0031, No. 44 at pp. 3-4)
In response to Wilo's comment regarding the calculation-based
approach, DOE notes that DOE developed the calculation-based approach
with extensive feedback and input from the CIP Working Group and
believes that it is appropriate for the categories and configurations
of pumps for which DOE proposed it would be applicable. DOE also notes
that, as described in the April 2015 pumps test procedure NOPR, the
calculation-based approach is significantly less burdensome than the
testing-based approach since a manufacturer may elect to determine the
PEI rating for several pump models sold with different combinations of
motors and/or continuous controls based on the physical test of the
bare pump only. That is, manufacturers may test a representative sample
of bare pumps (see section III.G for a description of DOE's sampling
provisions for pumps) and all subsequent ratings of that bare pump sold
with any combination of motors that are covered by DOE's energy
conservation standards, submersible motors, and continuous controls may
be calculated using the calculation-based approach with no additional
physical testing. Due to the potentially large burden associated with
requiring physical testing of each potential combination of a bare
pump, motor, and continuous control, as well as the existing concerns
of manufacturers and other interested parties regarding the proposed
test procedure (see section IV.B), DOE is electing to maintain the
calculation-based procedure as an option for applicable pumps.
DOE also notes that the calculation-based procedure is required for
bare pumps, as testing-based methods do not apply to bare pumps because
a PEI rating (which includes the efficiency of the motor) cannot be
determined based on a test of the bare pump alone. For all other pump
configurations, the calculation-based method is only offered as an
option, should manufacturers choose to employ it. Therefore, if Wilo
prefers to use the testing-based approach to certify their equipment,
it may do so for all configurations of pumps except bare pumps.
Regarding the accuracy or validity of any evaluation tools to
implement any calculations associated with either the calculation-based
or testing-based approach, DOE notes that manufacturers must rate pumps
in accordance with the test procedure. The calculation-based approach
required by the regulations provides sufficient detail for
manufacturers to develop reliable tools. Nonetheless, manufacturers are
responsible for ensuring that any calculations are performed correctly,
whether performed using an evaluation tool or by hand, for both the
calculation-based and the testing-based approaches.
In response to Wilo's comment regarding the potential for a
manufacturer to improve the PEI rating of a given pump model sold with
a motor, but without continuous controls, by pairing the pump with
continuous controls, DOE acknowledges that the PEI for pumps sold with
continuous controls tested using either the calculation-based or
testing-based approach will be better (i.e., lower) than that of the
same pump sold and tested with a motor only. However, consistent with
the feedback provided by the CIP Working Group, DOE believes that
decreased PEI is reflective and representative of the improved energy
performance customers are likely to observe in the field. That is, the
load points and, in the case of controlled-motors, the system curve,
assumed for these pumps (discussed in section III.B and III.E.2.c,
respectively) are representative of the operation of such pumps in the
field. DOE also notes that, as mentioned in the April 2015 pumps test
procedure NOPR, the testing-based method is intended to allow for more
granular differentiation of equipment performance, including
differentiation of the performance of different models or styles of
continuous controls. In particular, DOE noted in the April 2015 pumps
test procedure NOPR that the ability of the testing-based method to
differentiate among the performance of various continuous controls was
particularly important for pumps sold with motors and continuous
controls, since DOE is only assuming a single
[[Page 4127]]
system performance curve to represent all applicable continuous
controls, as described in section III.E.1.c, and the testing-based
method may provide an opportunity for manufacturers to differentiate
among the performance of different continuous control technologies. Id.
at 17627-28.
In this test procedure final rule, DOE is adopting the test method
applicability proposed in the April 2015 pumps test procedure NOPR and
shown in Table III.8 with no modifications. As proposed in the NOPR,
DOE is also adopting requirements that manufacturers report the test
method used to determine the ratings for applicable pump models and
provisions that when conducting assessment and enforcement testing DOE
will use the same method reported by manufacturers.
The specific test methods, any comments DOE received on the
proposed methods and applicability, and the final test methods DOE is
adopting in this final rule are discussed in the following sections:
Section III.E.1.a: The calculation-based approach for bare
pumps (method A.1),
section III.E.1.b: The calculation-based approach for
pumps sold with applicable motors,
section III.E.1.c: The calculation-based approach for
pumps sold with applicable motors and continuous controls,
section III.E.2.b: The testing-based approach for pumps
sold with motors, and
section III.E.2.c: The testing-based approach for pumps
sold with motors and continuous or non-continuous controls.
1. Calculation-Based Test Methods
In the April 2015 pumps test procedure NOPR, DOE proposed that the
following calculation-based test methods would be used to rate (1)
pumps sold as bare pumps (method A.1); (2) pumps sold either with (a)
motors that are regulated by DOE's electric motor standards or (b)
submersible motors (method B.1); and (3) pumps sold with motors that
are either (a) regulated by DOE's electric motor standards or (b)
submersible motors, and that are equipped with continuous controls
66 67 (method C.1). 80 FR 17586, 17616 (April 1, 2015).
---------------------------------------------------------------------------
\66\ The calculation-based test method was designed to capture
the dynamic response of a control that can continuously respond to
changes in load and reduce power consumption at all load points
below BEP. Therefore, pumps sold with non-continuous controls would
instead use the testing-based method described in section III.E.2.c,
which captures some reduction in power consumption at some reduced
flow rates. DOE discussed this approach with the CIP Working Group,
which generally agreed with it, although such a recommendation was
not specifically included in the CIP Working Group recommendations.
(Docket No. EERE-2013-BT-NOC-0039, No. 107 at pp. 49-50)
\67\ DOE notes that some pumps sold with continuous controls,
such as pumps sold with ECMs, may not be eligible to apply the
calculation-based method based on the fact that ECMs are not: (1) A
type of motor covered by DOE's energy conservation standards for
covered motors or (2) a submersible motor (see section III.E). These
pumps would instead apply a testing-based method.
---------------------------------------------------------------------------
Regardless of the pump configuration or characteristics, the
calculation-based test method for the applicable pump types includes
the following steps:
(1) Physical testing of the bare pump, in accordance with HI 40.6-
2014, to determine the pump BEP and pump shaft input power at 75, 100,
and 110 of actual BEP flow, adjusted to nominal speed;
(2) Determining the part load losses of the motor (or default
motor) and any continuous or non-continuous controls applicable to the
rated pump model at each load point;
(3) Taking the sum of the pump shaft input power at nominal speed
and the calculated part load motor losses at each load point in the
constant load or variable load profiles, as applicable, to determine
the input power to the pump at each load point;
(4) Determining the PERCL or PERVL, as
applicable, for the given pump as the weighted average of the input
power to the pump at the applicable load points;
(5) Determining the PERSTD for the minimally compliant
pump, as described in section III.B.2; and
(6) Dividing the PERCL or PERVL from step 4
by the PERSTD for that pump model to determine
PEICL or PEIVL, respectively.
The specific test methods for bare pumps, pumps sold with motors,
and pumps sold with motors and continuous controls are described in
more detail in the following sections III.E.1.a, III.E.1.b, and
III.E.1.c, respectively.
a. Calculation-Based Test Method A.1: Bare Pump
As described previously, DOE proposed in the April 2015 pumps test
procedure NOPR that the bare pump PERCL would be determined
based on the measured pump shaft input power at 75, 100, and 110
percent of BEP flow. 80 FR 17586, 17616-17 (April 1, 2015). Section
III.C of this final rule describes the test method for determining pump
shaft input power at the specified load points, which is based on HI
40.6-2014. DOE proposed that the measured pump shaft input power at the
three constant-load flow points would then be combined with the part
load motor losses at each load point and equally weighted to determine
PERCL for that bare pump, as shown in equation (16):
[GRAPHIC] [TIFF OMITTED] TR25JA16.014
Where:
[omega]i = weighting at load point i (equal weighting or
\1/3\ in this case),
Pi\in,m\ = calculated input power to the motor at load
point i (hp),
Pi = the shaft input power to the bare pump at load point
i (hp),
Li = default motor losses at load point i (hp), and
i = load point corresponding to 75, 100, or 110 percent of BEP flow
as determined in accordance with the DOE test procedure.
Id.
The part load motor losses for the bare pump would be determined
for the bare pump based on a default nominal full load motor
efficiency, representative of a motor that is minimally compliant with
DOE's electric motor energy conservation standards (or the default
minimum motor efficiency for submersible motors), as described in
section III.D.1, and the default motor loss curve, as described in
section III.D.2. Id.
As presented in section III.B, the PEICL for a bare pump
can then be calculated as the PERCL for a given pump divided
by the PERSTD for a pump that is minimally compliant with
DOE's pump standards sold without controls, as shown in equation (17):
[[Page 4128]]
[GRAPHIC] [TIFF OMITTED] TR25JA16.015
Where:
PERSTD = the PERCL for a pump of the same
equipment class with the same flow and specific speed
characteristics that is minimally compliant with DOE's energy
conservation standards serving the same hydraulic load (hp). The
procedure for determining PERSTD is described in detail
in section III.B.2.
For bare pumps, DOE proposed establishing the calculation-based
approach (method A.1) as the only applicable test procedure, as
testing-based methods do not apply to bare pumps because a PEI rating
(which includes the efficiency of the motor) cannot be determined based
on a test of the bare pump alone.
DOE received no specific comments on the proposed test procedure
for bare pumps and is adopting the calculation-based test procedure, as
proposed.
b. Calculation-Based Test Method B.1: Pump Sold With a Motor
For pumps sold with motors that either are regulated by DOE's
electric motor standards or are submersible motors, DOE proposed to
allow the use of the applicable calculation-based method (method B.1),
in addition to the testing-based method (method B.2, discussed in
section III.E.2.b). In these cases, DOE proposed that the calculation-
based test procedure would be similar to that for pumps sold alone
(method A.1) except that the represented nominal full load motor
efficiency, or losses, would be that of the motor with which the pump
is sold when determining PERCL, as opposed to the default
nominal full load motor efficiency assumed in the bare pump case. For
motors covered by DOE's electric motor standards, DOE proposed that the
represented nominal full load motor efficiency be determined in
accordance with the DOE electric motor test procedure specified at 10
CFR 431.16 and appendix B to subpart B of part 431 (see section
III.D.2) and applicable procedures for determining the represented
value (also specified in 10 CFR part 429 and 431). For pumps sold with
submersible motors rated using the calculation-based method, the
default nominal full load submersible motor efficiency would be
determined from Table III.6 (see section III.D.1.b). DOE also
reiterated that this calculation-based method would not apply to pumps
sold with motors that are not subject to DOE's electric motor standards
(except for submersible motors). 80 FR 17586, 17618 (April 1, 2015).
The PEICL for pumps sold with motors would then be
calculated using a similar approach that would be applied to bare pumps
shown in equations (16) and (17), above, except that the default part
load losses of the motor at each load point would be determined based
on the represented nominal full load motor efficiency, as described in
section III.D.2. Id.
As previously discussed in section III.B.2, in determining
PERSTD, DOE proposed to use the electric motor efficiency
standards listed at 10 CFR 431.25 for polyphase NEMA Design B motors as
the default nominal full load motor efficiency of the minimally
compliant pump for pumps sold with motors other than submersible
motors. Similarly, for pumps sold with submersible motors, the default
nominal full load motor efficiency would be that specified in Table
III.6 in section III.D.1.b for both the rated pump model and
PERSTD. Id.
In the April 2015 pump test procedure NOPR, DOE requested comment
on several specific items related to the proposed calculation-based
test procedure for pumps sold with applicable motors. Specifically, DOE
requested comment on its proposal to determine the part load losses of
motors covered by DOE's electric motor energy conservation standards
using the represented nominal full load motor efficiency, as determined
in accordance with DOE's electric motor test procedure, and the same
default motor part load loss curve used in test method A.1. In
response, HI commented that it could not comment on this issue. (HI,
No. 8 at p. 21) DOE received no additional comments on this proposal.
DOE requested comment on its proposal that pumps sold with motors
that are not addressed by DOE's electric motors test procedure (except
submersible motors) would be rated based on the testing-based approach,
and HI commented that it agrees with this proposal. (HI, No. 8 at p.
21) DOE received no additional comments on this proposal and has
determined that no revisions are necessary.
DOE also requested comment on its proposal to determine the
PERCL of pumps sold with submersible motors using the
proposed default nominal full load efficiency values for submersible
motors and to apply the same default motor part load loss curve to the
default motor in test method A.1 to the bare pump. HI commented that it
agrees with the proposal as long its concerns regarding submersible
motor efficiency, as detailed in section III.D.1.b of this final rule,
are addressed. (HI, No. 8 at p. 21) DOE received no other comments on
this proposal.
Based on the comments received from interested parties, DOE is
adopting the proposed test method B.1 for pumps sold with motors
covered by DOE's electric motor test procedure. For pumps sold with
submersible motors, the default nominal full load submersible motor
efficiency values used in the calculation of PERCL and
PERSTD are the values shown in Table III.7, which are
revised based on the input from HI.
c. Calculation-Based Test Method C.1: Pump Sold With a Motor and
Continuous Controls
For pumps sold with continuous controls and motors that are either
(a) regulated by DOE's electric motor standards for electric motors or
(b) submersible motors, DOE proposed, in the April 2015 pumps test
procedure NOPR, to allow use of either the applicable calculation-based
method (method C.1, discussed in this section III.E.1.c) or the
testing-based method (method C.2, discussed in section III.E.2.c). 80
FR 17618-19. The proposed calculation-based approach for pumps sold
with motors and continuous controls determines the PEIVL
metric, which accounts for the power reduction resulting from reducing
speed to achieve a given flow rate, as opposed to throttling. In this
case, DOE proposed that the PEIVL would be determined as the
PERVL of the given pump divided by the PERSTD,
where the PERSTD would be determined in accordance with the
procedures in section III.B.2, and the PERVL would be
determined as the weighted average input power to the pump at 25, 50,
75, and 100 percent of BEP flow, as shown in equation (18):
[[Page 4129]]
[GRAPHIC] [TIFF OMITTED] TR25JA16.016
Where:
[omega]i = weighting at load point i (equal weighting or
\1/4\ in this case),
Piin,c = measured or calculated driver power
input to the continuous or non-continuous controls at load point i
(hp), and
i = 25, 50, 75, and 100 percent of BEP flow, as determined in
accordance with the DOE test procedure.
Id.
Similar to the calculation-based approaches for bare pumps and
pumps sold with motors, the input power to the pump when sold with
motors and continuous controls would be determined by adding together
the pump shaft input power and the combined losses from the motor and
continuous controls at each of the load points. However, in the case of
determining PERVL for pumps sold with motors and continuous
controls, DOE proposed that only the input power at the 100 percent of
BEP flow load point would be determined through testing, and the
remaining 25, 50, and 75 percent of BEP flow load points would be
calculated based on an assumed system curve. In particular, consistent
with CIP Working Group discussions (Docket No. EERE-2013-BT-NOC-0039,
No. 107 at pp. 49-50), DOE proposed to use a quadratic reference system
curve, which goes through the BEP and an offset on the y-axis,
representative of a static head component to the system curve. The
reference system curve equation is shown in equation (19) and depicted
in Figure III.1:
[GRAPHIC] [TIFF OMITTED] TR25JA16.017
Where:
H = the total system head (ft),
Q = the flow rate (gpm),
Q100% = flow rate at 100 percent of BEP flow
(gpm), and
H100% = total pump head at 100 percent of BEP
flow (ft).
[GRAPHIC] [TIFF OMITTED] TR25JA16.018
DOE's approach for developing the proposed system curve is
discussed in detail in the April 2015 pump test procedure NOPR. Id. at
17619-20.
To determine the pump shaft input power at 25, 50, and 75 percent
of BEP flow, DOE proposed to apply the reference system curve discussed
in section III.E.1.c and assume that continuous speed reduction is
applied to achieve the reduced load points. Specifically, the reduction
in pump shaft input power at part loadings was assumed to be equivalent
to the relative reduction in pump hydraulic output power assumed by the
system curve, as shown in equation (20):
[[Page 4130]]
[GRAPHIC] [TIFF OMITTED] TR25JA16.019
Where:
Pi = shaft input power to the bare pump at load point i
(hp),
P100% = shaft input power to the bare pump at
100 percent of BEP flow (hp),
Qi = flow rate at load point i (gpm),
Q100% = flow rate at 100 percent of BEP flow
(gpm), and
i = 25, 50, and 75 percent of BEP flow as determined in accordance
with the DOE test procedure.
Id. at 17620-21.
Finally, to calculate the PERVL for pumps sold with
applicable motors and continuous controls, DOE proposed to apply a
separate algorithm for determining the part load losses of the motor
and continuous controls together, to account for the additional losses
as a result of inefficiencies from the continuous control and increased
inefficiencies in the speed-controlled motor due to harmonic
distortion. Based on data DOE collected regarding VFD performance, DOE
determined that four part load loss equations would be the most
appropriate way to represent the combined efficiency of the motor and
continuous control as a function of the output power of the motor and,
therefore, proposed to use the polynomial expression shown in equation
(21) to estimate the aggregate part load losses of motors and
continuous controls at each load point:
[GRAPHIC] [TIFF OMITTED] TR25JA16.020
Where:
zi = the part load loss factor for the motor and
continuous controls at load point i;
a,b,c = coefficients based on motor horsepower, see Table III.9;
Pi = the shaft input power to the bare pump at load point
i (hp);
MotorHP = the horsepower of the motor with which the pump is being
rated (hp); and
i = 25, 50, 75, and 100 percent of BEP flow as determined in
accordance with the DOE test procedure.
Table III.9--Motor and Continuous Control Part Load Loss Factor Equation Coefficients for Equation (21)
----------------------------------------------------------------------------------------------------------------
Coefficients for equation (21)
Motor horsepower (hp) -----------------------------------------------------
a b c
----------------------------------------------------------------------------------------------------------------
<=5....................................................... -0.4658 1.4965 0.5303
>5 and <=20............................................... -1.3198 2.9551 0.1052
>20 and <=50.............................................. -1.5122 3.0777 0.1847
>50....................................................... -0.8914 2.8846 0.2625
----------------------------------------------------------------------------------------------------------------
The development of DOE's part load loss factor equations for motors
and continuous controls are also described in detail in the April 2015
pumps test procedure NOPR. 80 FR 17586, 17621 (April 1, 2015).
To determine the resultant PEIVL rating for pumps sold
with applicable motors and continuous controls and rated based on the
calculation-based approach, the PERVL determined based on
the reference system curve and default motor and control losses would
be divided by the PERSTD, determined in accordance with the
procedure described in section III.B.2. DOE notes that, although the
PERVL of the tested pump only requires the 100 percent of
BEP flow load point to be determined experimentally, the full HI 40.6-
2014 test would still be required, and the pump hydraulic output power
at 75, 100, and 110 percent of BEP flow would still be necessary for
determining the PERSTD of the given pump. Id. at 17621-22.
In response to DOE's proposed calculation-based approach for pumps
sold with application motors and continuous controls, HI commented that
it is in agreement with the calculation-based test method for pumps
sold with motors and continuous controls, provided that the corrected
version of NOPR equation (6) presented at the April 2015 NOPR public
meeting is used. (HI, No. 8 at pp. 21-22) HI also specifically
indicated that it agrees with the proposed system curve shape, and that
it agrees that the curve should go through the statically loaded
offset.
Regal Beloit commented that it accepts the structure of the pump
energy conservation standards NOPR and the April 2015 pumps test
procedure NOPR as presented with respect to motor-drive efficiency
testing and evaluation, and encouraged the use of the forthcoming
industry standard IEC 61800-9-2 once it is published and at such time
as the DOE seeks to revise the pumps test procedure. (Regal Beloit, No.
9 at p. 1) DOE understands that the IEC standard will serve as a 60 Hz
version of the 50 Hz European industry standard BS EN 50598. DOE will
review the IEC standard once it is available, and may consider it for
future rulemaking activity.
DOE received no other comments on this test method, and confirms
that the final rule uses the corrected equation for determining the
minimum standard pump efficiency presented at the April 2015 NOPR
public meeting.
d. Other Calculation Methods for Determination of Pump Performance
In the April 2015 pumps test procedure NOPR, DOE proposed that each
bare pump model be physically tested in accordance with the test
procedure and that calculations alone could not be used to determine
bare pump performance. DOE noted that the calculation-based test
procedure for certain applicable pumps already contains provisions for
tested bare pump performance to be combined with default or tested
performance data regarding the motor or motor with continuous or non-
continuous controls to calculate the PER of multiple pump basic models.
Therefore, DOE proposed that, beyond the calculations proposed in the
April 2015 pumps test procedure
[[Page 4131]]
NOPR, DOE would not permit use of other algorithms or alternative
efficiency determination methods to determine the rated performance of
covered pumps or pump components (i.e., motors or controls). 80 FR
17586, 17622-23 (April 1, 2015).
DOE requested comment on its proposal to require testing of each
individual bare pump as the basis for a certified PEICL or
PEIVL rating for one or more pump basic models. DOE also
requested comment on its proposal to limit the use of calculations and
algorithms in the determination of pump performance to the calculation-
based methods proposed in the NOPR. HI commented that it agrees with
these proposals. (HI, No. 8 at p. 22) DOE received no additional
comments on these proposals and, consistent with the comments submitted
by HI, is adopting such calculation methods as discussed in this
section III.E.1 in this final rule.
2. Testing-Based Methods
Testing-based methods directly measure the input power to the
motor, continuous control, or non-continuous control at the load points
of interest (i.e., 75, 100, and 110 percent of BEP flow for
uncontrolled pumps and 25, 50, 75, and 100 percent of BEP flow for
pumps sold with a motor and speed controls). As such, as discussed
previously, these methods cannot be applied to bare pumps. In addition,
these test methods are the only test methods applicable to pumps sold
with motors that are not addressed by DOE's electric motor test
procedure (except submersible motors) or that are sold with non-
continuous controls and are an optional procedure for all pumps sold
with motors or motors with continuous controls.
The following sections describe DOE's proposals, any comments
received from interested parties, and the final test provisions DOE is
adopting in this final rule on the following topics:
How to determine BEP for pumps rated using the testing-
based method (section III.E.2.a),
the testing-based approach for pumps sold with motors
(method B.2; described in section III.E.2.b), and
the testing-based approach for pumps sold with motors and
continuous or non-continuous controls (method B.3; described in section
III.E.2.c).
a. The Best Efficiency Point for Pumps Testing Using Testing-Based
Methods
In the April 2015 pumps test procedure NOPR, DOE noted that when
testing some pumps using testing-based methods, it is not possible to
determine BEP as a ratio of pump input power over pump hydraulic power
unless additional measurements are made of bare pump performance or
pump shaft input power, in addition to input power to the motor. See
section III.C.2.d. Specifically, in the case of pumps sold with motors
or motors with continuous or non-continuous controls measured using
testing-based methods, DOE noted that input power to the pump shaft is
not measured directly in the proposed test procedure. As such, DOE
proposed that the BEP for such pumps be determined using a similar
procedure to that discussed in section III.C.2.d for calculation-based
methods; however, BEP would be determined using the maxima of what is
typically known as overall efficiency (i.e., the input power to the
driver or continuous control, if any, divided by the pump hydraulic
output power at the nominal speed), rather than pump efficiency. 80 FR
17586, 17623 (April 1, 2015).
DOE requested comment on its proposal to require manufacturers to
determine BEP for pumps rated with a testing-based method by using the
ratio of input power to the driver or continuous control, if any, over
pump hydraulic output. DOE also requested input on the degree to which
this method may yield significantly different BEPs from the case in
which BEP is determined based on pump efficiency. HI commented that BEP
can only be determined when testing the bare pump. HI also indicated
that determining BEP through a wire-to-water (i.e., testing-based)
method will cause the manufacturers to have to test each motor
configuration sold with the bare pump, increasing the burden. HI
recommended that the manufacturer be given the option to determine BEP
by testing as a bare pump or by testing using a wire to water test. HI
also recommended that BEP be instead defined as the pump hydraulic
power operating point consisting of both flow and head conditions that
result in the maximum efficiency of the certified unit. (HI, No. 8 at
pp. 22-23).
After review, DOE has determined that the HI proposal would yield
different efficiency ratings for the same pump. In response to HI's
comment, DOE notes that DOE initially proposed that the BEP when
applying the testing-based methods would be based on the overall
efficiency in order to reduce burden when conducting testing. That is,
when testing a pump in accordance with the testing-based method, DOE
proposed that the overall efficiency would be used to determine pump
efficiency so that the pump shaft input power would not have to be
separately determined, since measurements of pump shaft input power are
not otherwise needed when conducting the test procedure. If DOE were
instead to specify that BEP be determined based on the pump efficiency
only, pumps tested using the testing-based approaches would either need
to have additional instrumentation installed (e.g., a torque sensor) to
measure pump shaft input power or, in some cases, would require
duplicative testing of the pump with a calibrated motor if a torque
sensor could not be inserted between the bare pump and motor based on
the pump design. For example, ESCC and VTS pumps would not be able to
be tested using the testing-based methods to determine BEP based on
pump efficiency in the same test, unless a calibrated motor with the
same characteristics as the motor with which the pump model was to be
distributed in commerce was used.
In response to HI's concern regarding the increased burden of
determining the BEP based on overall efficiency, DOE finds this
statement to be erroneous, since the determination of BEP based on
overall efficiency would only be required for the testing-based
approaches and the testing-based approaches already require each basic
model to be tested. Under the proposed approach, no incremental testing
would be necessary. To the extent that manufacturers wish to use the
calculation-based methods to determine the PEI of applicable pumps, the
BEP of the bare pump, based on pump efficiency, must be used. However,
these data are irrelevant to determining the PEI of pumps under the
testing-based approach, since the two methods are mutually exclusive.
That is, the PEI of a given pump cannot be determined via both
calculation-based and testing-based approaches. DOE has ensured that
this is clear in the regulatory text included in this final rule.
Regarding HI's proposal to optionally allow manufacturers to use
either pump efficiency or overall efficiency, DOE believes that such an
approach could potentially result in variability in the BEP, and thus
PEI, for the same pump model. This is unacceptable since each pump
model can have only one certified PEI value associated with it and that
value must be repeatable and consistent among test facilities.
DOE believes that the approach proposed in the April 2015 pumps
test procedure NOPR will result in representations that are more
straightforward and consistent, as well as less burdensome, for those
pumps rated using the testing-based approach. As such, DOE is adopting,
in this final rule, the approach proposed in the April 2015 pump test
procedure NOPR to
[[Page 4132]]
determine the BEP of pumps rated using the testing-based approach based
on overall efficiency, as opposed to pump efficiency.
Regarding HI's comment that BEP should be determined as the load
point associated with maximum efficiency, which consists of both head
and flow points, DOE acknowledges HI's comments and agrees that the BEP
for each pump represents the flow and head points representing maximum
efficiency at full impeller diameter. In particular, DOE notes that
DOE's definition of BEP, as adopted in this final rule, specifies BEP
with respect to a load point, consisting of both flow and head
conditions. However, in this test procedure final rule, DOE in general
refers to BEP flow, since DOE's specified load points are characterized
with respect to BEP flow only. DOE understands that the head and flow
of a given pump, at full impeller diameter and without throttling, are
inextricably linked, so it is not necessary to independently account
for and specify both parameters. That is, for example, by specifying
the flow at 100 percent of BEP, the power calculated at that load point
will, necessarily, also be reflective of head at 100 percent of BEP
flow, since the data are all based on the same curve. It is not
possible to determine the power input at, for example, 50 percent of
BEP flow and 100 percent of BEP head without throttling the pump,
trimming the impeller, or otherwise physically altering the tested
equipment or test set-up such that the data generated would no longer
be reflective of the pump model being tested. As such, DOE does not
believe that any additional specifications or clarifications regarding
the BEP load point are necessary in the pumps test procedure.
b. Testing-Based Test Method B.2: Pump Sold With a Motor
For pumps sold with motors that are not regulated by DOE's electric
motor standards (except for submersible motors), DOE proposed that use
of the testing-based method B.2, discussed in this section III.E.2.b,
would be required because the nominal full load efficiency of the
motor, as determined using a specific standardized procedure, is not
available for those motors. For pumps sold with motors subject to DOE's
electric motor standards or submersible motors, the testing-based
approach discussed in this section III.E.2.b would be optional.
In the April 2015 pumps test procedure NOPR, DOE also proposed
that, for pumps sold with motors, the PEICL could be
determined by wire-to-water testing, as specified in HI 40.6-2014,
section 40.6.4.4. In this case, the PERCL would become an
average of the measured power input to the motor at the three specified
load points, as shown in equation (22):
[GRAPHIC] [TIFF OMITTED] TR25JA16.021
Where:
[omega]i = weighting at load point i (equal weighting or
\1/3\ in this case),
Pi\in,m\ = measured or calculated driver power input to
the motor at load point i (hp), and
i = load point at 75, 100, or 110 percent of BEP flow as determined
in accordance with the DOE test procedure.
80 FR 17586, 17623 (April 1, 2015).
DOE received no comments on the proposed testing-based approach for
pumps sold with motors and, as such, is adopting the provisions
discussed in the April 2015 pumps test procedure NOPR with no changes.
c. Testing-Based Test Method C.2: Pump Sold With a Motor and Speed
Controls
For pumps sold with non-continuous control-equipped motors that are
either (1) regulated by DOE's electric motor standards for electric
motors or (2) submersible motors, as defined in section III.E.1.c, DOE
proposed in the April 2015 pumps test procedure NOPR that the
calculation-based method C.1 would not be applicable because these
controls are not able to follow the reference system curve described in
section III.E.1.c. Instead, pumps sold with non-continuous controls
would have to be tested using the testing-based method C.2. For pumps
sold with motors not regulated by DOE's electric motor standards
(excluding submersible motors) that are equipped with either continuous
or non-continuous controls, DOE also noted that only these testing-
based methods (method C.2) would apply, as is the case for pumps sold
with motors not regulated by DOE's electric motor standards (excluding
submersible motors) without controls (discussed in section III.E.2.b).
80 FR 17586, 17627 (April 1, 2015).
For pumps sold with continuous controls and motors that are (1)
regulated by DOE's electric motor standards for electric motors or (2)
submersible motors, the testing-based approach discussed herein (method
C.2) would be optional, and such pumps may also be tested under the
calculation-based approach, as discussed in section III.E.1.c. Id.
Regarding the specific procedures contained in the testing-based
approach for pumps sold with motors and continuous or non-continuous
controls, DOE proposed that the PEIVL may be determined by
wire-to-water testing, based on the procedure specified in HI 40.6,
section 40.6.4.4, except that the input power:
Is the ``driver input power'' defined in table 40.6.2.1 of
HI 40.6-2014 and referenced in table 40.6.3.2.3, section 40.6.4.4, and
section 40.6.6.2,
refers to the input power to the continuous or non-
continuous control, and
is determined in accordance with the tolerances and
requirements for measuring electrical power described in section
III.C.2.e.
80 FR 17623-24.
DOE clarified that, with the proposed approach, pump manufacturers
would determine the BEP of the pump, inclusive of motor and continuous
or non-continuous controls, as described in section III.E.2.a, and then
adjust the operating speed of the motor and the head until the
specified head and flow conditions are reached (i.e., 25, 50, and 75
percent of BEP flow and the associated head pressures determined by the
reference system curve in section III.E.1.c). To ensure this method C.2
results in consistent and repeatable ratings, DOE also proposed
tolerances around each load point of 10 percent about (i.e., above and
below) the target flow and head load points defined on the reference
system curve for each pump. Similarly, DOE also proposed that the
measured data would be
[[Page 4133]]
extrapolated to the exact load points specified by the reference system
curve using the following equation (23):
[GRAPHIC] [TIFF OMITTED] TR25JA16.022
Where:
Pi = the corrected driver power input to the continuous
or non-continuous controls at load point i (hp),
Hsp,i = the specified total system head at load point i
based on the reference system curve (ft),\68\
---------------------------------------------------------------------------
\68\ DOE notes that in the April 2015 pumps test procedure NOPR,
DOE proposed to define the tested and ``reference'' head and flow
values using the subscript ``T'' for tested and ``R'' for rated
(e.g., HR, HT, QR, QT).
DOE notes that Table 40.6.2.2b of HI 40.6-2014 provides a list of
subscripts for use in applying the HI 40.6-2014 test method.
Specifically, Table 40.6.2.2b defines the subscript ``sp'' as
denoting ``specified'' values and the subscript ``M'' as denoting
measured values. For the sake of clarity and continuity, in this
final rule, DOE is adopting subscripts consistent with the defined
HI nomenclature.
---------------------------------------------------------------------------
HM,j = the measured total system head at load point j
(ft),
Qsp,i = the specified total system flow rate at load
point i based on the reference system curve (gpm),
QM,j = the measured total system flow rate at load point
j (gpm),
PM,j = the measured shaft input power to the bare pump at
load point j,
i = specified load point at 25, 50, 75, or 100 percent of BEP flow
as determined in accordance with the DOE test procedure, and
j = measured load point corresponding to specified load point i.
Id. at 17624-25.
Under DOE's proposed approach, the PER would become the mean of the
measured power input to the continuous or non-continuous control at the
four specified load points based on the assumed system curve (as in
method C.1), as shown in equation (24):
[GRAPHIC] [TIFF OMITTED] TR25JA16.023
Where:
[omega]i = weighting at load point i (equal weighting or
\1/4\ in this case),
Pi\in,c\ = measured or calculated driver power input to
the continuous or non-continuous controls at load point i (hp), and
i = load point at 25, 50, 75, or 100 percent of BEP flow, as
determined in accordance with the DOE test procedure.
Id. at 17625.
In the April 2015 pumps test procedure NOPR proposal, DOE also
noted that some pumps are sold with non-continuous controls, such as
multi-speed motors, that are not able to follow the reference system
curve directly at all load points. For example, in the case of a pump
sold with a two-speed motor, the pump will operate at full speed (i.e.,
the nominal speed) for some of the load points and reduced speed at the
other load points, as shown in Figure III.2.
[[Page 4134]]
[GRAPHIC] [TIFF OMITTED] TR25JA16.024
For pumps sold with non-continuous controls, DOE proposed to modify
this testing-based method C.2 for pumps sold with motors and continuous
or non-continuous controls to specify that the head measurements
associated with each of the specified flow points would not have to be
achieved within 10 percent of the specified head, as described by the
reference system curve--only the flow rate would need to be achieved
within 10 percent of the specified value. Id. at 17626. Instead, DOE
proposed to require that the measured pump total head corresponding to
the 25, 50, 75 and 100 percent of BEP flow points could not be lower
than 10 percent below that defined by referenced system curve. DOE also
proposed that, in this case, the measured head and flow rate would not
be corrected to the reference system curve. Instead, the tested load
points would be used directly in further calculations of
PEIVL. Id.
DOE requested comment on the proposed testing-based method for
pumps sold with motors and continuous or non-continuous controls, as
well as the proposed testing-based method for determining the input
power to the pump for pumps sold with motors and non-continuous
controls. In addition, DOE requested comment on any other type of non-
continuous control that may be sold with a pump and for which the
proposed test procedure would not apply.
HI commented that it agrees with the optional testing-based
methods, but also indicated that any pump sold with an ON/OFF control
should be tested or calculated using a PEICL method. (HI,
No. 8 at p. 23) DOE agrees with HI that ON/OFF switches do not
constitute a type of continuous or non-continuous control for which the
calculation-based or testing-based methods (C.1 and C.2, respectively)
or the PEIVL metric, would be applicable. Consistent with
the April 2015 pumps test procedure NOPR section III.A.1.a and public
meeting slide 45, DOE has revised Table 1 in appendix A accordingly to
clarify that (1) the calculation-based and testing-based methods to
determine PEIVL apply to pumps sold with motors and
continuous or non-continuous controls only; whereas, (2) the test
methods for pumps sold with motors (methods B.1 and B.2) apply to pumps
sold with motors and controls other than continuous and non-continuous
controls.
F. Representations of Energy Use and Energy Efficiency
As noted previously, manufacturers of any pumps within the scope of
the pump test procedure will be required to use the test procedure
established in this rulemaking when making representations about the
energy efficiency or energy use of their equipment. Specifically, 42
U.S.C. 6314(d) provides that ``[n]o manufacturer . . . may make any
representation . . . respecting the energy consumption of such
equipment or cost of energy consumed by such equipment, unless such
equipment has been tested in accordance with such test procedure and
such representation fairly discloses the results of such testing.''
In the April 2015 pumps test procedure NOPR, DOE noted that
performing the proposed test procedure for pumps requires a key
component (C-value) that is being addressed through the parallel
standards rulemaking for pumps (Docket No. EERE-2011-BT-STD-0031). 80
FR 17586, 17628 (April 1, 2015). Because of this dependency, DOE
clarified that manufacturers of equipment that are addressed by this
test procedure and any applicable standards that DOE may set would have
180 days after the promulgation of those standards to begin using the
DOE procedure.
With respect to representations, generally, DOE stated its
understanding that manufacturers often make representations
(graphically or in numerical form) of energy use metrics, including
pump efficiency, overall (wire-to-water) efficiency, bowl efficiency,
driver power input, pump power input (brake or shaft horsepower), and/
or pump power output (hydraulic horsepower) and may
[[Page 4135]]
make these representations at multiple impeller trims, operating
speeds, and number of stages for a given pump. DOE proposed in the
April 2015 pumps test procedure NOPR to allow manufacturers to continue
making these representations. Id.
DOE also proposed that any representations of PEI and PER must be
made in accordance with the DOE test procedure, and there may only be
one PEI or PER representation for each basic model. In other words,
representations of PEI and PER that differ from the full impeller PEI
and PER cannot be made at alternate speeds, stages, or impeller trims.
Additionally, if the PEI and PER for a basic model is rated using any
method other than method A.1, ``bare pump with default motor efficiency
and default motor part load loss curve,'' such a basic model may not
include individual models with alternate stages or impeller trims.
If a manufacturer wishes to make unique representations of PEI or
PER based on a trimmed impeller, the manufacturer must certify the
trimmed impeller as a separate basic model. In such a case, the
``trimmed impeller'' being rated would become the ``full impeller'' for
the new basic model (i.e., the maximum diameter impeller distributed in
commerce for that pump model) (see section III.A.1.c). 80 FR 17586,
17628 (April 1, 2015).
In response to DOE's language regarding representations in the
April 2015 pumps test procedure NOPR, HI stated its concern with the
somewhat vague language used around 42 U.S.C. 6314(d) prohibited
representation. HI emphasized that it is imperative that pump
manufacturers be allowed to continue using pre-existing efficiency
curves and sizing software that is used directly by end users and
distributors to purchase pumps. HI noted its interpretation that the
following text: ``Manufacturers often make these representations at
multiple impeller trims, operating speeds, and number of stages for a
given pump. DOE proposes to allow manufacturers to continue making
these representations.'' indicates that existing performance and
efficiency data can continue to be used and that only representations
of PER and PEI fall under [the requirements of] 42 U.S.C. 6314(d)
``Prohibited Representation.'' HI requested that DOE clearly articulate
in the final rule that prohibited representation under 42 U.S.C.
6314(d) applies only to PER and PEI representations. (HI, No. 8 at p.
1)
In response to HI's comment regarding the nature of representations
manufacturers are allowed to make regarding the performance of their
equipment under 42 U.S.C. 6314(d), DOE reiterates that, beginning 180
days after publication of this final rule in the Federal Register, all
representations regarding PERCL and PERVL must be
made in accordance with the DOE test procedure. Similarly, all
representations regarding PEICL and PEIVL must be
made in accordance with the DOE test procedure beginning 180 days after
publication of a final rule in the Federal Register that sets C-values
(i.e., a final rule in the parallel energy conservation standards
rulemaking). However, regarding other measures of energy use, energy
efficiency, or related performance metrics for pumps, DOE clarifies
that such representations must be made using methods that will generate
values consistent with the DOE test procedure, as finalized in this
final rule. DOE acknowledges that manufacturers have large amounts of
pre-existing data that they currently use to market and make
representations about the performance of their equipment and that
regenerating all of this data within the 180 day timeframe would be
burdensome. As such, manufacturers may continue to use such data to
make representations about the performance of applicable pump models
after the 180 day timeframe, provided manufacturers are confident that
the values are consistent with those that would be generated under the
adopted test procedure.
In the April 2015 NOPR public meeting, the EEAs noted that it would
be helpful if DOE could have its certification materials available
prior to the compliance date so that manufacturers can make early
representations of PEI. (EEAs, NOPR public meeting transcript, No. 7 at
pp. 191-192) The EEAs also noted that it would be helpful for all the
fields in the certification report to show up in the database, or that
they would determine which items the utility programs would need.
(EEAs, NOPR public meeting transcript, No. 7 at pp. 206-207) DOE
discusses compliance certification reporting in the parallel energy
conservation standards rulemaking, and has considered the stakeholder
comments in that rule.
G. Sampling Plans for Pumps
DOE provides in subpart B to 10 CFR part 429 sampling plans for all
covered equipment. The purpose of these sampling plans is to provide
uniform statistical methods for determining compliance with prescribed
energy conservation standards and for making representations of energy
consumption and energy efficiency on labels and in other locations such
as marketing materials. In the April 2015 pumps test procedure NOPR,
DOE proposed that, for pumps, the same statistical sampling plans used
for other commercial and industrial equipment would be applicable and
proposed to add the sampling plan to 10 CFR 429.59. 80 FR 17586, 17628-
29 (April 1, 2015).
Under the proposal, DOE proposed that a sample of sufficient size
must be randomly selected and tested to ensure compliance and that a
minimum of two units must be tested to certify a basic model as
compliant. DOE also proposed to apply the same statistical sampling
procedures, including the confidence limit and derating factor, that
are applicable to many other types of commercial and industrial
equipment, as DOE believes equipment variability and measurement
repeatability associated with the measurements proposed for rating
pumps are similar to the variability and measurement repeatability
associated with energy efficiency or consumption measurement required
for other commercial equipment. Id.
Finally, DOE proposed that DOE would determine compliance in an
enforcement matter based on the arithmetic mean of a sample not to
exceed four units. Id.
DOE received no comments on this proposal. However, upon reviewing
the April 2015 pump test procedure NOPR proposals, DOE identified
several provisions that require clarification to ensure that DOE's
certification and enforcement provisions are clear and consistent.
First, in the April 2015 pumps test procedure NOPR, the equations
for the upper confidence limit (UCL) and lower confidence limit (LCL)
in section 429.60 both referenced a confidence limit of 0.95. 80 FR
17586, 17640 (April 1, 2015). However, the UCL and LCL were proposed to
be divided by a de-rating factor of 1.01 and 0.99, respectively. Id.
DOE notes that the confidence limit of the t-statistic and the de-
rating factor in the denominator, collectively, are intended to capture
the likely variability in pump testing resulting from the allowable
test tolerances and instrument accuracy (discussed in sections III.C),
lab-to-lab variability, and manufacturing tolerances contained within
each model. In the April 2015 pumps test procedure NOPR, DOE had
proposed a confidence limit of 99 percent, expecting a 95 percent
confidence limit would exceed the amount of variability in PEI that
would occur in pump ratings. Specifically, because PEI is an indexed
value, with values that range from zero to one, this decreases the
amount of
[[Page 4136]]
variability that may occur in each individual measurement.
DOE received no comments from interested parties in response to the
proposal in the April 2015 pumps test procedure NOPR. However, DOE
reevaluated the April 2015 pumps test procedure NOPR proposal and
determined that the resultant values may yield overly conservative
results that would effectively require such pumps to meet a more
stringent standard than that considered in the associated pumps energy
conservation standards rule (Docket No. EERE-2011-BT-STD-0031).
Therefore, in this final rule, DOE is correcting the confidence limit
and derating factor adopted in this final rule to better reflect the
likely variability in test results expected to result from the pumps
test procedure, lab-to-lab variability, and manufacturing tolerances.
Specifically, for the purpose of regulating pumps, a confidence limit
of 0.95 and de-rating factor of 1.05 or 0.95 is required due to the
combined impacts of test tolerances, experimental variability in
conducting the test procedure, and manufacturing variability for this
equipment. That is, given the likely variation of measured PEIs within
a sample of pump units of the same model, a confidence limit of 0.95 is
necessary to ensure that the statistical requirements in the sampling
plan for pumps are consistent with the magnitude of the variance
between tested units within a sample resulting from manufacturing
tolerances and experimental uncertainty inherent in the test procedure.
Therefore, DOE is adopting a confidence limit of 0.95 and de-rating
factors of 1.05 and 0.95 as applicable to pumps in this test procedure
final rule.
Also, regarding testing pumps for enforcement purposes, DOE is
clarifying, in this final rule, the procedure for determining BEP when
the ``expected BEP'' may not be known to DOE. As discussed in section
III.C.2.d, the procedure for determining BEP described in section
40.6.5.5.1 of HI 40.6-2014 requires that the flow points are to be 40,
60, 75, 90, 100, 110, and 120 percent of the expected BEP of the pump
model and that if the BEP rate of flow is displaced by more than 5
percent, the test must be repeated. In the case of enforcement testing,
DOE will follow the same procedure as manufacturers in determining the
BEP of the pump. In this final rule, DOE is clarifying that DOE will
use the volume rate of flow (flow rate) at BEP and nominal speed
certified by the manufacturer for that pump model as the expected BEP
when performing the BEP test. In the case that the BEP rate of flow is
more than 5 percent displaced from the certified value, DOE will also
retest the pump as required by the test procedure. However, if the
retested BEP rate of flow is still more than 5 percent displaced from
the manufacturer's certified value, DOE will use the mean of the tested
values as the volume rate of flow (flow rate) at BEP and nominal speed
in subsequent calculations when determining the PEI for that model.
IV. Procedural Issues and Regulatory Review
A. Review Under Executive Order 12866
The Office of Management and Budget (OMB) has determined that test
procedure rulemakings do not constitute ``significant regulatory
actions'' under section 3(f) of Executive Order 12866, Regulatory
Planning and Review, 58 FR 51735 (Oct. 4, 1993). Accordingly, this
action was not subject to review under the Executive Order by the
Office of Information and Regulatory Affairs (OIRA) in OMB.
B. Review Under the Regulatory Flexibility Act
The Regulatory Flexibility Act (5 U.S.C. 601, et seq.) requires
preparation of a regulatory flexibility analysis for any rule that by
law must be proposed for public comment, unless the agency certifies
that the rule, if promulgated, will not have a significant economic
impact on a substantial number of small entities. As required by
Executive Order 13272, ``Proper Consideration of Small Entities in
Agency Rulemaking,'' 67 FR 53461 (August 16, 2002), DOE published
procedures and policies on February 19, 2003, to ensure that the
potential impacts of its rules on small entities are properly
considered during the DOE rulemaking process. 68 FR 7990. DOE has made
its procedures and policies available on the Office of the General
Counsel's Web site: http://energy.gov/gc/office-general-counsel.
DOE reviewed today's final rule, which establishes new test
procedures for pumps, under the provisions of the Regulatory
Flexibility Act and the procedures and policies published on February
19, 2003. DOE concludes that the final rule DOE is adopting will not
result in a significant impact on a substantial number of small
entities. The factual basis set forth in the following sections.
1. The Need for, and Objectives of, Today's Rule
While DOE is currently evaluating whether to establish energy
conservation standards for pumps, DOE must first establish a test
procedure that measures the energy use, energy efficiency, or estimated
operating costs of a given type of covered equipment before
establishing any new energy conservation standards for that equipment.
See, generally, 42 U.S.C. 6295(r) and 6316(a). To fulfill these
requirements, DOE is establishing the test procedure for pumps,
described in this final rule, concurrent with its ongoing energy
conservation standards rulemaking for this equipment. See Docket No.
EERE-2011-BT-STD-0031.
In this test procedure, DOE prescribes test methods for measuring
the energy consumption of certain pumps, inclusive of motors and
controls (continuous or non-continuous), if they are included with the
pump when distributed in commerce. In addition, this final rule
establishes a new subpart Y to part 431 of Title 10 of the Code of
Federal Regulations that contains DOE's new test procedure for pumps,
as well as definitions pertinent to establishing the scope of pumps to
which the adopted test procedure is applicable. This final rule also
contains sampling plans for pumps for the purposes of demonstrating
compliance with any energy conservation standards that DOE adopts.
DOE's test procedure contains methods to determine the energy
consumption for all equipment for which this test procedure applies
using either calculation-based methods and/or testing-based methods.
While both methods include some amount of testing and some amount of
calculation, the terms ``calculation-based'' and ``testing-based'' are
used to distinguish between methods in which the input power to the
pump is determined either by (a) measuring the bare pump shaft input
power \69\ and calculating efficiency, or losses, of the motor and any
continuous control \70\ (i.e., calculation-based method) or (b)
measuring the input power to the driver,\71\ or motor, and any
continuous or non-continuous controls \72\ for a given pump directly
[[Page 4137]]
(i.e., testing-based method). As such, the test procedure includes
measurements and calculations of the produced hydraulic power, pump
shaft input power, electric input power to the motor, and electrical
input power to the continuous or non-continuous controls, as
applicable, which are substantially based on the test methods contained
in the industry test standard HI Standard 40.6-2014, ``Methods for
Rotodynamic Pump Efficiency Testing,'' (``HI 40.6-2014''), with slight
modifications as noted in section III.C.2.
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\69\ The term ``pump shaft input power'' is referred to as
``pump power input'' in HI 40.6-2014. The term ``pump shaft input
power'' is used synonymously with that term in this document.
\70\ DOE notes that for non-continuous controls, as defined in
section III.E.1.c, PEIVL can only be determined using a
``testing-based'' method. If a calculation-based method is desired,
the pump would instead be rated as a pump sold with a motor and
without speed controls using the PEICL metric. See
section III.E.1.c for further discussion.
\71\ The input power to the driver is referred to as ``driver
power input'' in HI 40.6-2014. The term ``input power to the
driver'' is used synonymously with that term in this document.
\72\ In the case that a pump is sold with a motor equipped with
either continuous or non-continuous controls and is rated using the
testing-based method, the input power to the pump would be
determined as the input power to the continuous or non-continuous
control. See section III.E.2.c.
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This test procedure final rule also contains requirements regarding
(1) the characteristics, categories, and configurations of pumps to
which the adopted test procedure is applicable; (2) the specific manner
in which pumps must be tested to determine any applicable
representations regarding the performance of pumps subject to the test
procedure; and (3) the number of pump units that must be tested to
determine the representative value for each basic model. As noted in
the April 2015 pump test procedure NOPR and further elaborated in
section III.F, DOE's new pumps test procedure requires a key component
(C-value) that is being addressed through the parallel standards
rulemaking for pumps (Docket No. EERE-2011-BT-STD-0031). 80 FR 17586,
17628 (April 1, 2015). As such, the use of this test procedure as the
basis for any representations regarding the energy efficiency or energy
use of pumps would not be required until 180 days after the publication
of any energy conservation standards final rule in the Federal
Register, Therefore, DOE notes that the test methods, definitions, and
sampling plans contained in this final rule do not introduce any
incremental burden to any manufacturers, since the use of such test
methods is not required by this test procedure final rule by itself.
That is, any burden associated with testing pumps in accordance with
the requirements of this test procedure final rule is not be required
until the promulgation of any energy conservation standards final rule
for pumps. On this basis, DOE maintains that this final rule has no
incremental burden associated with it and a final regulatory
flexibility analysis is not required.
While DOE maintains that this final rule has no incremental burden
associated with it when viewed as a stand-alone rulemaking, DOE
recognizes that pump energy conservation standards are currently being
considered in an associated rulemaking (Docket No. EERE-2011-BT-STD-
0031) and may be proposed or promulgated in the near future. Therefore,
to consider the aggregate impacts of developing certified ratings for
applicable pump models for the purposes of making representations
regarding the energy use of such equipment or certifying compliance to
DOE under any future energy conservation standards, DOE is also
estimating the full burden of conducting the testing required by this
test procedure final rule for each pump model. Therefore, while such is
not required yet, DOE is presenting the results from conducting the
regulatory flexibility analysis to develop estimates of the costs
associated with testing equipment consistent with the requirements of
this test procedure final rule, as would be required to certify
compliance with the potential energy conservation standard. DOE
presents the results of such analysis in the following sections.
However, DOE is not determining the significance of that burden
with respect to manufacturers' financial situation or status as a small
entity. As the use of the testing requirements contained in this final
rule is contingent upon the energy conservation standards rulemaking,
DOE is analyzing the effect of the combined burden associated with both
the test procedure and energy conservation standard rulemakings in the
manufacturer impact analysis performed as part of the energy
conservation standard rulemaking (see docket EERE-2011-BT-STD-0031).
The costs described in the following subsections are referenced in the
manufacturer impact analysis in the pumps energy conservation standard
rulemaking to estimate the burden associated with testing. However, DOE
reiterates that the estimates provided in this test procedure
regulatory flexibility analysis serve only to provide information about
the possible burden manufacturers may incur while testing pumps using
this DOE test procedure; they do not represent actual burden incurred
by the industry as there is no incremental burden associated with this
test procedure final rule until and unless the associated pumps energy
conservation standard final rule is published.
2. Significant Issues From Interested Parties in Response to IRFA
Within the April 2015 pumps test procedure NOPR, DOE conducted an
initial regulatory flexibility analysis (IRFA). 80 FR 17586, 17629-33
(April 1, 2015). In response to DOE's April 2015 pumps test procedure
NOPR estimate of testing burden, DOE received written and verbal
comments at the April 2015 NOPR public meeting, as well as throughout
the comment period. Comments related to the potential burden include
comments related to potential anticompetitive effects of the proposed
test procedure; cost of test facility(s); labor costs; quantity of
manufacturers potentially affected; and manufacturer sales to assess
burden. In this final rule, DOE addresses these comments and presents a
revised assessment of potential burden related to test procedure final
rule.
Anticompetitive Effects of Burden and Expense
Consistent with DOE's requirements to comply with section 32(c) of
the Federal Energy Administration Act of 1974, as amended by the
Federal Energy Administration Authorization Act of 1977 (15 U.S.C. 788;
see section IV.L), DOE is required to consult with the Attorney General
and the Chairman of the Federal Trade Commission (FTC) concerning the
impact of the proposed test procedure on competition in the pumps
industry. The U.S. Department of Justice (DOJ) reviewed the April 2015
pumps test procedure NOPR, attended the April 2015 NOPR public meeting,
and consulted with members of the industry in preparing their comments
and conclusions regarding any anticompetitive effects of the pumps test
procedure. In response to the proposed test procedure, DOJ commented
that it is not able to determine whether or not the proposed test
procedure (or associated energy conservation standard) will lessen
competition within the industry. However, DOJ noted that it is
concerned about the possibility of anticompetitive effects resulting
from the burden and expense of compliance. (DOJ, No. 14 at p. 2)
In this final rule, DOE reviews the potential burden and expense
related to testing, but does not analyze the potential effects on
competition. However, DOE notes that it has taken steps, in the test
procedure adopted in this final rule to minimize burden on
manufacturers related to testing and rating equipment in accordance
with such procedures.
Burden of Test Facility(s)
In the April 2015 pumps test procedure NOPR, DOE estimated the
burden to manufacturers associated with performing testing in
accordance with the proposed test procedure. 80 FR 17586, 17629-33
(April 1, 2015). DOE estimated that in order to determine the
performance of any covered pump models for the purposes of making
[[Page 4138]]
representations or certifying compliance under any future energy
conservation standards for pumps, each manufacturer would have to
either (a) have the units tested in-house or (b) have the units tested
at a third party testing facility. In addition, if the manufacturer
elected to test pumps in-house, each manufacturer would have to
undertake the following burden-inducing activities:
(1) Construct and maintain a test facility that is capable of
testing pumps in compliance with the test procedure, including
acquisition and calibration of any necessary measurement equipment, and
(2) conduct the DOE test procedure on two units of each covered
pump model. Id.
Because pumps are newly regulated equipment and there are no
existing testing requirements for pumps, the capabilities of existing
testing facilities may vary widely from one manufacturer to another. In
the April 2015 pumps test procedure NOPR, DOE based it's assessment of
testing burden on the conservative assumption that pump manufacturers
would have no existing testing infrastructure and would have to bear
the full cost of constructing a new testing facility generally capable
of conducting testing in accordance with the proposed test procedure.
DOE estimated the capital cost of constructing the two types of
facilities: A facility equipped to perform the calculation-based test
methods (described in section, III.E.1), which varied between $91,000
and $277,000, and a facility equipped to perform the testing-based test
methods (described in section, III.E.2), which varied between $72,000
and $213,000. DOE amortized these capital costs to determine an annual
payment amount over an estimated 7-year loan period because DOE's
research indicated this was the typical loan period for pump
manufacturers. DOE's final calculations regarding the cost of
constructing a test lab assumed that the majority of pump models would
be certified based on the bare pump configuration and subsequent
ratings for the same bare pump sold with any number of applicable
motors and continuous controls could be generated using the
calculation-based approach. In addition, DOE estimated the ongoing cost
of testing between $161.61 and $430.96 per unit, plus calibration
activities of $1,241.67 per year. 80 FR 17586, 17632 (April 1, 2015)
Based on these assumptions, DOE estimated the amortized total burden
associated with the test procedure ranged between $61,000 and $221,000
annually for small manufacturers affected by this rule. Id.
DOE requested specific comments and feedback on a number of
assumptions made in the April 2015 pumps test procedure NOPR regulatory
flexibility analysis. Regarding the cost of constructing a test
facility capable of performing the test procedure presented in the
April 2015 pumps test procedure NOPR, HI stated that the estimates of
materials and costs to build a pump testing facility as presented are
greatly underestimated and would be in excess of $1 million. HI
indicated that DOE's facility description leaves out many expensive
machines and other equipment that would be required for this testing.
(HI, No. 0008 at pp. 24-25)
DOE disagrees with the comments from HI regarding the cost of the
testing facility and the effect of burden on manufacturers and the
industry. DOE notes that, in the April 2015 pumps test procedure NOPR
initial regulatory flexibility analysis (IRFA), DOE used the most
burdensome assumptions to estimate the burden associated with complying
with the test procedure, resulting in estimates lower than the $1
million HI suggested. DOE notes that the estimated costs in the IRFA
were based on the construction of a facility capable of conducting the
DOE test procedure for pumps within the scope of the rulemaking.
Because of a lack of information on existing testing facilities in the
industry, as well as the potential variability in the capabilities of
these existing facilities, DOE assumed that no manufacturers would have
existing test capabilities and all manufacturers would have to
construct new test laboratories in order to comply with the test
procedure. DOE also assumed in the IRFA that no third party
laboratories were available to conduct testing in accordance with the
DOE test procedure. 80 FR 17586, 17631 (April 1, 2015).
DOE recognizes that many pump manufacturers already have pump test
facilities and conduct pump testing as part of an existing
manufacturing quality control process, to develop pump performance
information for new and existing products, and to demonstrate the
performance of specific pump units for customers. As such, for the
purposes of estimating testing burden associated with this test
procedure final rule, DOE has revised the baseline assumptions
regarding the existing test lab capabilities of manufacturers and has
estimated the incremental burden associated with just those test
procedure requirements that would not typically exist in current
manufacturer facilities. DOE describes these updated assumptions and
analysis in section IV.B.3.
Regarding the capabilities of existing test laboratories, HI
commented that it disagrees with DOE's assumption in the NOPR that the
use of a non-calibrated test motor and VFD with a torque meter would be
the most common and least costly approach for testing bare pumps in
accordance with the proposed DOE test procedure. (HI, No. 0008 at p.
24) Additionally, HI noted that it did not find anything in the NOPR
preamble that mentions recertification requirements. (HI, No. 0008 at
p. 25)
DOE acknowledges comments from HI on the underestimated cost
estimates to build a pump testing facility and suggestions of
components. DOE disagrees with HI that a VFD control would not be the
most common approach for testing pumps in accordance with the DOE test
procedure. DOE conducted a literature search for pump configurations
and determined that almost all controls available to be paired with
pumps are VFD controls. DOE also reiterates that the estimates used in
the IRFA were not meant to be the least costly for manufacturers. The
cost estimates for constructing a test facility were meant to be the
most burdensome on manufacturers to show the most costly approach to
building a test facility. DOE acknowledges the comment from HI
regarding recertification requirements and clarifies that the estimates
for recertification requirements in the April 2015 pumps test procedure
NOPR IRFA are for pumps which have been redesigned to capture market
preferences or other customer requirements. DOE estimates that 10
percent of basic models per manufacturer will be redesigned and tested
each year, and the Department has included the costs of testing newly
redesigned pumps in this DOE test procedure final rule regulatory
flexibility analysis (see section IV.B.3). To further clarify these
costs, DOE has removed the terminology used in the April 2015 pumps
test procedure NOPR IRFA regarding recertification that was unclear.
Instead, in this final rule, DOE uses redesigned and tested to refer to
pumps that would require new certifications each year, as their energy
performance will have changed as a result of the equipment redesign.
DOE notes that only those pump models for which the energy consumption
characteristics have changed necessitate a new basic model
certification and that pump models whose energy consumption
characteristics have not changed do not need to be recertified.
[[Page 4139]]
HI agreed that, for most pump models, only physical testing of the
underlying bare pump model is required, and subsequent rating for that
bare pump sold with a motor or motor and continuous control can be
based on calculations only. (HI, No. 0008 at p. 24) HI also stated that
all pumps listed within the scope as outlined in the term sheet can be
evaluated in accordance with the methodology described in the April
2015 pumps test procedure NOPR if the corrected equation presented by
DOE at the April 29, 2015 public meeting is used. (HI, No. 0008 at p.
24) HI stated that it could not comment on the number of pump models
per manufacturer that would be required to use the test (wire-to-water)
method to certify pump performance based on a lack of data, but stated
that 100 percent of pumps would need to be tested to certify because of
the new testing requirements and sampling provisions. (HI, No. 0008 at
p. 25)
DOE appreciates the comment from HI that only physical testing of
the underlying bare pump is required and that subsequent configurations
can be based on calculations. DOE agrees with HI that 100 percent of
pumps would need to be tested to certify compliance with a proposed PEI
standard, if adopted in a standards final rule. This is true for
PEICL and PEIVL because these values cannot be
calculated without the finalized C-Values from the energy conservation
standards rulemaking. In addition, the PERCL and
PERVL metrics contain specific assumptions regarding the
representative performance of pumps and pump components that are not
part of the industry's current test methods. However, as noted in
section III.F, DOE recognizes that manufacturers already make some
representations regarding the performance of relevant pumps (e.g., pump
efficiency, BEP efficiency, and pump total head or volume rate of flow
(flow rate) at BEP and full impeller) based on testing using test
standards consistent with or similar to HI 40.6-2014, which DOE is
incorporating by reference as the basis for the DOE test procedure. As
such, DOE notes that, while all PEICL, PEIVL,
PERCL, and PERVL ratings must be newly-generated,
some existing test data that were collected consistent with the methods
DOE is incorporating by reference into the DOE test procedure may be
used, provided manufacturers are confident any such values are
equivalent to those that would be generated using the new DOE test
procedure.
Quantity of Manufacturers Potentially Affected
To calculate the burden associated with testing pumps on aper
manufacturer or per model basis, DOE collected information on the
number of manufacturers in the pumps industry, and the numbers of
models per manufacturer. DOE then focused this analysis on the small
entities as part of the regulatory flexibility analysis. To determine
which pump manufacturers were small entities, DOE referenced the Small
Business Administration (SBA) size threshold for ``Pump and Pumping
Equipment Manufacturing'' (North American Industry Classification
System code 333911).\73\ The SBA sets a threshold of 500 employees or
less for an entity to be considered as a small business for this
category, as established at 13 CFR 121.201.
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\73\ See http://www.sba.gov/sites/default/files/files/Size_Standards_Table.pdf.
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In the April 2015 pumps test procedure NOPR, DOE conducted a
focused inquiry into small business manufacturers of equipment covered
by this rulemaking. DOE identified 68 distinct manufacturers of covered
pump products sold in the U.S. DOE then analyzed those 68 to determine
which would be considered a small business. After removing entities
that are foreign owned or operated, DOE determined that there were 25
small businesses in the analysis. These 25 companies represent 29
percent of pump manufacturers with facilities in the United States. 80
FR 17586, 17629 (April 1, 2015).
In response to DOE's assessment of the number of small
manufacturers subject to the pumps test procedure rule, HI commented
that the HI organization currently has 106 member companies (pump
manufacturers and associate members) and is aware of more entities
within the market. HI believes that the identification of 68 distinct
pump manufacturers in the U.S. is low. (HI, No. at pp. 23-24)
DOE appreciates the comment from HI that there are more
manufacturers in the pump manufacturing industry that are not included
in this analysis. DOE notes that although HI might have associate
members, if the member does not manufacture a pump, the associate
member is not part of the analysis. During its market survey, DOE used
available public information to identify potential small manufacturers.
DOE's research involved the review of individual company Web sites and
marketing research tools (e.g., Dun and Bradstreet reports, Manta,
Hoovers) to create a list of companies that manufacture pumps covered
by this rulemaking. DOE also contacted HI to obtain information about
pump manufacturing companies that participate in the national
association. DOE identified 86 potential businesses of covered pump
products sold in the U.S., but reduced that number to 68 by determining
which businesses were located in the United States. From these
manufacturers, DOE eliminated 29 from the analysis because they had
more than 500 employees. DOE removed an additional 16 manufacturers
because they either had foreign parent companies or had domestic parent
companies with 500 or more employees. After removing entities that are
foreign owned or operated, DOE determined that there were 25 small
businesses to investigate for this analysis. The regulatory flexibility
analysis investigated manufacturers who manufacture pumps within the
scope of this rulemaking, are considered a small business according to
SBA standards, and are not foreign-owned or operated. Thus, there are
fewer manufacturers analyzed in the regulatory flexibility analysis
than are present in the industry.
In summary, DOE agrees with HI that 68 distinct manufacturers is
low on an industry-wide basis, but that is because the number was
reduced by other criteria before being presented in the April 2015
pumps test procedure NOPR. DOE notes that HI is not disagreeing with
DOE's assessment of the quantity of small businesses, but rather the
potential size of total pump manufacturers in the U.S. Following the
April 2015 pumps test procedure NOPR, DOE has not identified any more
(or different) manufacturers that meet the criteria (domestic
headquarters, not owned by another entity, meets the SBA threshold of
500 employees or fewer) to be considered a small business. Therefore,
in this final rule, DOE maintains the quantity of 25 small businesses
for purposes of analyzing the potential burden. Within the 25 small
businesses, DOE has, however, identified an additional manufacturer
that produces pumps that are within the scope of this rulemaking and
have included this manufacturer in this DOE pumps test procedure final
rule regulatory flexibility analysis (raising the total from 15 to 16).
Manufacturer Sales To Assess Burden
In the April 2015 pumps test procedure NOPR, DOE used average sales
to assist in assessing the potential burden. 80 FR 17586, 17629 (April
1, 2015). HI commented that it has no alternative to offer other than
using the
[[Page 4140]]
average sales, but noted that it does not understand what DOE is
presenting in Table IV.2 [of the April 2015 pumps test procedure NOPR].
(HI, No. 0008 at p. 25)
DOE agrees with HI that there is no better alternative to using
average sales as the financial indicator for assessing the burden on
manufacturers. DOE notes that Table IV.2 in the April 2015 pumps test
procedure NOPR displays the results of the initial regulatory
flexibility analysis. 80 FR 17586, 17633 (April 1, 2015). The columns
indicate the range of number of employees in each row; the number of
small businesses within each employee size range; the average number of
basic models produced by manufacturers in each employee size range; and
the average sales of the manufacturers in each employee size range as
determined from available data sources. Using the estimated potential
testing burden, number of basic models, and the average annual sales,
DOE determined the potential burden as a percentage of sales of each
group of small businesses (as defined by ranges of numbers of
employees). Because DOE maintains that this final rule has no
incremental burden associated with it when viewed as a stand-alone
rulemaking, DOE is only presenting the estimates of the costs
associated with testing equipment consistent with the requirements of
this test procedure final rule, as would be required to certify
compliance with potential energy conservation standards. As such, this
table of impacts on manufacturers as a result of conducting this test
procedure is no longer included in this regulatory flexibility
analysis.
HI commented that there will be a significant burden on both small
and large entities and believes that this estimated value would vary
depending on the size of the pump manufacturer. (HI, No. 0008 at pp.
25-26)
DOE agrees that the estimated burden may vary based on the size of
the manufacturers if energy conservation standards are promulgated. DOE
only considered the aggregate effects on small manufacturers of
developing certified ratings for applicable pump models for the
purposes of making representations regarding the energy use of such
equipment or certifying compliance to DOE under any future energy
conservation standards. The estimated burden of conducting the DOE test
procedure presented in the April 2015 pumps test procedure NOPR showed
that, as the number of employees increased, so did the number of basic
models and average sales. As a result, as the number of employees
increased, the average estimated burden, as a percentage of average
annual sales, decreased. Based on this analysis, it is likely that the
burden may vary based on the size of manufacturer.
DOE cannot confirm HI's comment that there will be a significant
burden on large manufacturers because the regulatory flexibility
analysis aims to assess whether there is a significant economic impact
on a substantial number of small entities. DOE did not assess the
impact of the rule on large entities. However, DOE notes that the
parallel energy conservation standards rulemaking includes a full
manufacturer impact analysis (Docket No. EERE-2011-BT-STD-0031).
3. Revised Assessment of Burden Associated With This Test Procedure
Final Rule
In the initial regulatory flexibility analysis portion of the April
2015 pumps test procedure NOPR, DOE estimated the most burdensome costs
for manufacturers to conduct the DOE test procedure. In the initial
regulatory flexibility analysis DOE recognized that, because testing is
not currently required or standardized, testing facilities may vary
widely from one pump manufacturer to another. For the purposes of
estimating testing burden in the initial regulatory flexibility
analysis, DOE estimated the burden associated with a situation where a
given pump manufacturer did not have existing test facilities at all
and would be required to construct such facilities to test equipment in
accordance with the test procedure. In light of comments received
regarding the burden associated with testing, DOE revised the analysis
and gathered additional information to better characterize the expected
burden associated with testing basic models in accordance with the DOE
test procedure.
DOE is analyzing the effect of the combined burden associated with
both the test procedure and energy conservation standards rulemakings
in the manufacturer impact analysis performed as part of the energy
conservation standards rulemaking (see docket EERE-2011-BT-STD-0031).
The costs described in the following subsection are referenced in the
manufacturer impact analysis in the pumps energy conservation standards
rulemaking to estimate the burden associated with testing. However, DOE
reiterates that the estimates provided serve only to provide
information about the possible burden manufacturers may incur while
testing pumps using this DOE test procedure; they do not represent
actual burden incurred by the industry as there is no incremental
burden associated with this test procedure final rule until and unless
the associated pumps energy conservation standards final rule is
published.
The DOE test procedure will require pump manufacturers to conduct
the calculation-based method or the testing-based method, depending on
the type and configuration of the pump(s) being tested. DOE is adopting
the less burdensome calculation-based test method as the required test
method for bare pumps, and as optional test methods for pumps other
than bare pumps. This includes pumps sold with motors that are covered
by DOE's electric motor energy conservation standards or submersible
motors and pumps sold with either of these two motor styles that are
also sold with continuous controls (see section III.E for a more
thorough description of the applicability of the calculation-based
approach to different pump configurations). DOE is also requiring that
manufacturers use a testing-based method where pumps are sold either
with motors that are not covered by DOE's electric motor energy
conservation standards (except submersible motors) or with non-
continuous controls.
Both the calculation-based method and the testing-based method
require physical testing of pumps at some level and, as such, utilize a
similar basic testing facility. DOE recognizes that all manufacturers,
regardless of HI membership, have access to test facilities to be able
to produce pump curves that characterize the performance of their
equipment. As such, DOE estimated that all manufacturers would be able
to conduct the DOE test procedure in an available test facility.
Sixteen of 25 small manufacturers identified in DOE's survey of
manufacturers produce pumps that fall within the scope of this
rulemaking and would be required to perform testing; the other 9
produce pump types that are not within the scope of pumps for which
this test procedure is applicable. Of the 16 manufacturers that produce
pumps within the scope of this rulemaking, 8 are members of HI
according to their listing on HI's Web site.\74\
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\74\ See http://www.pumps.org/member_companies.aspx.
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As member companies of HI, DOE assumes that manufacturers with
pumps within the scope of this test procedure would test pumps in
accordance with HI's most current industry testing standards. That is,
DOE assumes that manufacturers that are HI members already conduct
testing in accordance
[[Page 4141]]
with HI 40.6-2014. In HI 40.6-2014, manufacturers are required to test
their pumps in an ISO 9906 Grade 2B test facility, which is the same
grade test facility prescribed in HI 14.6-2011. Because the
calculation-based method described in this test procedure is equivalent
to HI 40.6-2014, as recommended by the Working Group, manufacturers who
are members of HI would already be capable of testing pumps in
accordance to the testing-based method in this test procedure. There is
no incremental cost to calibrate measurement instrumentation for these
manufacturers because HI 40.6-2014 prescribes calibration intervals for
all instruments in the test facility. The testing-based method in this
test procedure requires electrical measurement equipment capable of
measuring true RMS current, true RMS voltage, and real power up to at
least the 40th harmonic of fundamental supply source frequency with an
accuracy level of 2.0 percent of full scale when measured
at the fundamental supply source frequency, as discussed in section
III.C.2.e. Electrical equipment accuracy of 2.0 percent of
reading is consistent with the value specified in section 40.6.3.2.3 of
HI 40.6-2014. Therefore, the is no incremental cost to conduct testing
for HI member companies when testing pumps pursuant to the testing-
based method or the calculation-based method.
Manufacturers who are not members of HI need to purchase electrical
measurement equipment with 2.0 percent accuracy to conduct
the testing-based method of the DOE test procedure. DOE determined that
the average cost of such equipment is approximately $5,218.42 based on
a review of available products on the market. Unlike the manufacturers
who are HI members, the non-HI manufacturers may not perform regular
equipment calibration and, as such, will incur an additional cost to
calibrate the instruments in the test facility. DOE assumed that each
testing facility would need to calibrate the instrumentation used in
the test loop as specified in HI 40.6-2014 appendix D. The flowmeter,
torque sensor, and power quality meter all should be calibrated once a
year. The pressure transducer should be calibrated every 4 months and a
laser tachometer should be calibrated every 3 years. These
calibrations, together, cost a manufacturer about $1,241.67 per year.
DOE analyzed the estimated burden for 7 years for the 16 small
manufacturers that produce pumps within the scope of the DOE test
procedure. DOE used an analysis period of 7 years based on the
assumption that the machinery qualifies for a 7-year depreciation
schedule under the Modified Accelerated Cost Recovery System
(MACRS).\75\ The average, and representative, of the likely burden to
manufacturers is $6,334 for the capital costs associated with
constructing a test facility capable of conducting the DOE test
procedure. This burden ranges between $0 and $12,668.
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\75\ Department of the Treasury, Internal Revenue Service. How
to Depreciate Property. IRS Pub. 926.
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Both methods of the test procedure require test personnel to set
up, conduct, and remove each pump in accordance with that procedure.
DOE estimated the cost of labor using the median hourly wage of $41.44
for the overall category of an engineer.\76\ Including fringe benefits,
which are estimated to be nominally 30 percent of total compensation,
the total hourly cost to an employer is estimated to be $53.87.\77\
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\76\ U.S. Department of Labor, Bureau of Labor Statistics. 2012.
National Occupational Employment and Wage Estimates. Washington, DC
Available at http://www.bls.gov/oes/2012/may/oes_nat.htm#17-0000.
\77\ U.S. Department of Labor, Bureau of Labor Statistics. 2014.
Employer Costs for Employee Compensation--Management, Professional,
and Related Employees. Washington, DC Available at: http://www.bls.gov/news.release/pdf/ecec.pdf.
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Based on conversations with test engineers, DOE estimates it would
take between 1 and 2 hours of an engineer's time to complete the test
procedure per unit tested, which would result in a cost of $53.87 to
$107.74 per unit based on an engineer's labor rate of $53.87 per hour.
DOE estimates that setting up and removing the pumps from the test
stand would require 2 to 6 hours of the engineer's time depending on
the size of the pump and any other fittings that need to be configured
to enable testing, resulting in a cost between $107.74 to $323.22 per
unit based on the labor rate of $53.87 per hour for an engineer. The
total cost of testing a pump, including setup, tests, and takedown
ranges between $161.61 and $430.96 per unit. DOE estimates that the
time required to conduct the calculation-based method of test would be
the same as the time required to conduct the test-based method (wire-
to-water test).
DOE also estimates that pump manufacturers would redesign covered
pump models or introduce new pump models each year. As such, DOE
estimates that a certain portion of the pump models that a given pump
manufacturer offers for sale would need to be tested each year. DOE
estimates that approximately 10 percent of manufacturers' unique pump
models would need to be tested each year.
DOE amortized the capital costs against the recurring burden of
testing pumps described in this analysis for each small manufacturer
identified to produce pumps covered under the scope of the DOE test
procedure. DOE notes that the labor component represents the majority
of the overall cost associated with testing, while the much more
variable capital costs are only 23 percent of the total test cost. The
representative amortized burden for testing each unit of a basic model
is $561.16. As discussed in the sampling provisions in section III.G,
this test procedure will require manufacturers to test at least two
units of each pump basic model to develop a certified rating. This
results in an average cost of $1,122.32 to test two units of each basic
model.
While analyzing the potential burdens of testing pumps in-house,
DOE recognized that the price per basic model was higher for some
manufacturers than for others. For manufacturers with higher costs of
testing per basic model may elect to send their pumps to a third-party
test facility to mitigate these costs. DOE anticipates that third party
testing facilities will update their test facilities to be able to
provide testing for pump manufacturers in accordance with the DOE test
procedure. Based on market research and discussions with third party
test lab personnel, DOE estimates that testing pumps in a third party
test facility according to the DOE test procedure will cost
approximately $2,500 per unit.
4. Calculator Comments
Wilo indicated that one problem is that DOE is not responsible for
providing tools to determine compliance, so each manufacturer would be
responsible for creating its own potentially erroneous evaluation tool.
(Wilo, No. 0044 at p. 3-4) HI requested that DOE share the latest
version of the PEI calculator with the pump industry as an easy means
of determining whether their products fall within or outside the scope
of the efficiency levels specified in the rulemaking. (HI, No. 0002 at
p. 1) HI also requested that DOE provide a PEI calculator so that all
calculations for PEI are performed exactly the same way by all members
of the pump industry, government agencies and interested parties. (HI,
No. 0007 at p. 2) HI commented that the calculator could be used to
report data to interested utilities. (HI, No. 0007 at p. 10) HI also
commented that the complexity of the rating systems will cause a
significant burden on all manufacturers to develop
[[Page 4142]]
a tool which quickly evaluates product. This is even more important for
small and medium-sized companies that may not have the resources to
develop such an analytic tool on their own. (HI, No. 0008 at p. 2)
In response to the comments submitted by Wilo and HI, DOE made the
PEI calculator available on the pumps test procedure rulemaking Web
site.\78\ Under the provisions in this pumps test procedure final rule,
the PEI calculations must be performed using measured values--that is,
using results from testing actual pumps in accordance with the proposed
test method and sampling plan. The PEI calculator provided to the
public is not considered an Alternative Efficiency Determination Method
(AEDM) by the Department and is not to be used to simulate or estimate
the efficiency of a pump. DOE has provided this ``calculator'' as a
convenience at the request of interested parties. DOE notes that
manufacturers should consult section III.B of this final rule and the
adopted regulatory text at 10 CFR 431.464 and appendix A of subpart Y
for the formulas for calculating PEI and should not rely on this
spreadsheet. DOE also notes that while this calculator is an excel-
based version of the calculations in the test procedure proposal, DOE
did not rely on this document to develop the proposal itself.
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\78\ https://www1.eere.energy.gov/buildings/appliance_standards/product.aspx/productid/44#testprocedures.
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Based on the estimates presented, DOE believes that the test
procedure amendments will not have a significant economic impact on a
substantial number of small entities, and the preparation of a final
regulatory flexibility analysis is not required. DOE will transmit the
certification and supporting statement of factual basis to the Chief
Counsel for Advocacy of the Small Business Administration for review
under 5 U.S.C. 605(b).
C. Review Under the Paperwork Reduction Act of 1995
All collections of information from the public by a Federal agency
must receive prior approval from OMB. DOE has established regulations
for the certification and recordkeeping requirements for covered
consumer products and industrial equipment. 10 CFR part 429, subpart B.
DOE published a NOPR proposing energy conservation standards for pumps
on April 24, 2015. 80 FR 22938. In an application to renew the OMB
information collection approval for DOE's certification and
recordkeeping requirements, DOE included an estimated burden for
manufacturers of pumps in case DOE ultimately sets energy conservation
standards for this equipment. OMB has approved the revised information
collection for DOE's certification and recordkeeping requirements. 80
FR 5099 (January 30, 2015). In the April 2015 pumps test procedure
NOPR, DOE estimated that it will take each respondent approximately 30
hours total per company per year to comply with the certification and
recordkeeping requirements based on 20 hours of technician/technical
work and 10 hours clerical work to actually submit the Compliance and
Certification Management System templates. 80 FR 17586, 17633 (April
15, 2015).
In response to DOE's April 2015 pump test procedure NOPR, HI
commented that the hours shown are low and will vary by the number of
basic models covered. (HI, No. at p. 26)
DOE appreciates the comment submitted by HI regarding the burden
estimate to comply with the proposed recordkeeping requirements. DOE
recognizes that recordkeeping burden may vary substantially based on
company preferences and practices as well as the number of basic models
each manufacturer will test. However, DOE maintains that, on average,
it will take manufacturers approximately 30 hours to comply with the
certification and recordkeeping requirements. In addition, DOE notes
that, while this test procedure rulemaking includes recordkeeping
requirements that are associated with executing and maintaining the
test data for this equipment, the certification requirements would be
established in a final rule establishing energy conservation standards
for pumps.
Notwithstanding any other provision of the law, no person is
required to respond to, nor shall any person be subject to a penalty
for failure to comply with, a collection of information subject to the
requirements of the PRA, unless that collection of information displays
a currently valid OMB Control Number.
D. Review Under the National Environmental Policy Act of 1969
In this final rule, DOE amends its test procedure for pumps. DOE
has determined that this rule falls into a class of actions that are
categorically excluded from review under the National Environmental
Policy Act of 1969 (42 U.S.C. 4321 et seq.) and DOE's implementing
regulations at 10 CFR part 1021. Specifically, this rule amends an
existing rule without affecting the amount, quality or distribution of
energy usage, and, therefore, will not result in any environmental
impacts. Thus, this rulemaking is covered by Categorical Exclusion A5
under 10 CFR part 1021, subpart D, which applies to any rulemaking that
interprets or amends an existing rule without changing the
environmental effect of that rule. Accordingly, neither an
environmental assessment nor an environmental impact statement is
required.
E. Review Under Executive Order 13132
Executive Order 13132, ``Federalism,'' 64 FR 43255 (August 4,
1999), imposes certain requirements on agencies formulating and
implementing policies or regulations that preempt State law or that
have Federalism implications. The Executive Order requires agencies to
examine the constitutional and statutory authority supporting any
action that would limit the policymaking discretion of the States and
to carefully assess the necessity for such actions. The Executive Order
also requires agencies to have an accountable process to ensure
meaningful and timely input by State and local officials in the
development of regulatory policies that have Federalism implications.
On March 14, 2000, DOE published a statement of policy describing the
intergovernmental consultation process it will follow in the
development of such regulations. 65 FR 13735. DOE examined this final
rule and determined that it will not have a substantial direct effect
on the States, on the relationship between the national government and
the States, or on the distribution of power and responsibilities among
the various levels of government. EPCA governs and prescribes Federal
preemption of State regulations as to energy conservation for the
products that are the subject of this final rule. States can petition
DOE for exemption from such preemption to the extent, and based on
criteria, set forth in EPCA. (42 U.S.C. 6297(d)) No further action is
required by Executive Order 13132.
F. Review Under Executive Order 12988
Regarding the review of existing regulations and the promulgation
of new regulations, section 3(a) of Executive Order 12988, ``Civil
Justice Reform,'' 61 FR 4729 (Feb. 7, 1996), imposes on Federal
agencies the general duty to adhere to the following requirements: (1)
Eliminate drafting errors and ambiguity; (2) write regulations to
minimize litigation; (3) provide a clear legal standard for affected
conduct rather than a general standard; and (4) promote simplification
and burden reduction. Section 3(b) of Executive Order 12988
specifically
[[Page 4143]]
requires that Executive agencies make every reasonable effort to ensure
that the regulation: (1) Clearly specifies the preemptive effect, if
any; (2) clearly specifies any effect on existing Federal law or
regulation; (3) provides a clear legal standard for affected conduct
while promoting simplification and burden reduction; (4) specifies the
retroactive effect, if any; (5) adequately defines key terms; and (6)
addresses other important issues affecting clarity and general
draftsmanship under any guidelines issued by the Attorney General.
Section 3(c) of Executive Order 12988 requires Executive agencies to
review regulations in light of applicable standards in sections 3(a)
and 3(b) to determine whether they are met or it is unreasonable to
meet one or more of them. DOE has completed the required review and
determined that, to the extent permitted by law, this final rule meets
the relevant standards of Executive Order 12988.
G. Review Under the Unfunded Mandates Reform Act of 1995
Title II of the Unfunded Mandates Reform Act of 1995 (UMRA)
requires each Federal agency to assess the effects of Federal
regulatory actions on State, local, and Tribal governments and the
private sector. Public Law 104-4, sec. 201 (codified at 2 U.S.C. 1531).
For a regulatory action resulting in a rule that may cause the
expenditure by State, local, and Tribal governments, in the aggregate,
or by the private sector of $100 million or more in any one year
(adjusted annually for inflation), section 202 of UMRA requires a
Federal agency to publish a written statement that estimates the
resulting costs, benefits, and other effects on the national economy.
(2 U.S.C. 1532(a), (b)) The UMRA also requires a Federal agency to
develop an effective process to permit timely input by elected officers
of State, local, and Tribal governments on a proposed ``significant
intergovernmental mandate,'' and requires an agency plan for giving
notice and opportunity for timely input to potentially affected small
governments before establishing any requirements that might
significantly or uniquely affect small governments. On March 18, 1997,
DOE published a statement of policy on its process for
intergovernmental consultation under UMRA. 62 FR 12820; also available
at http://energy.gov/gc/office-general-counsel. DOE examined this final
rule according to UMRA and its statement of policy and determined that
the rule contains neither an intergovernmental mandate nor a mandate
that may result in the expenditure of $100 million or more in any year,
so these requirements do not apply.
H. Review Under the Treasury and General Government Appropriations Act,
1999
Section 654 of the Treasury and General Government Appropriations
Act, 1999 (Pub. L. 105-277) requires Federal agencies to issue a Family
Policymaking Assessment for any rule that may affect family well-being.
This final rule will not have any impact on the autonomy or integrity
of the family as an institution. Accordingly, DOE has concluded that it
is not necessary to prepare a Family Policymaking Assessment.
I. Review Under Executive Order 12630
DOE has determined, under Executive Order 12630, ``Governmental
Actions and Interference with Constitutionally Protected Property
Rights'' 53 FR 8859 (March 18, 1988), that this regulation will not
result in any takings that might require compensation under the Fifth
Amendment to the U.S. Constitution.
J. Review Under Treasury and General Government Appropriations Act,
2001
Section 515 of the Treasury and General Government Appropriations
Act, 2001 (44 U.S.C. 3516 note) provides for agencies to review most
disseminations of information to the public under guidelines
established by each agency pursuant to general guidelines issued by
OMB. OMB's guidelines were published at 67 FR 8452 (Feb. 22, 2002), and
DOE's guidelines were published at 67 FR 62446 (Oct. 7, 2002). DOE has
reviewed this final rule under the OMB and DOE guidelines and has
concluded that it is consistent with applicable policies in those
guidelines.
K. Review Under Executive Order 13211
Executive Order 13211, ``Actions Concerning Regulations That
Significantly Affect Energy Supply, Distribution, or Use,'' 66 FR 28355
(May 22, 2001), requires Federal agencies to prepare and submit to OMB
a Statement of Energy Effects for any significant energy action. A
``significant energy action'' is defined as any action by an agency
that promulgated or is expected to lead to promulgation of a final
rule, and that: (1) Is a significant regulatory action under Executive
Order 12866, or any successor order; and (2) is likely to have a
significant adverse effect on the supply, distribution, or use of
energy; or (3) is designated by the Administrator of OIRA as a
significant energy action. For any significant energy action, the
agency must give a detailed statement of any adverse effects on energy
supply, distribution, or use if the regulation is implemented, and of
reasonable alternatives to the action and their expected benefits on
energy supply, distribution, and use.
This regulatory action is not a significant regulatory action under
Executive Order 12866. Moreover, it would not have a significant
adverse effect on the supply, distribution, or use of energy, nor has
it been designated as a significant energy action by the Administrator
of OIRA. Therefore, it is not a significant energy action, and,
accordingly, DOE has not prepared a Statement of Energy Effects.
L. Review Under Section 32 of the Federal Energy Administration Act of
1974
Under section 301 of the Department of Energy Organization Act
(Pub. L. 95-91; 42 U.S.C. 7101), DOE must comply with section 32 of the
Federal Energy Administration Act of 1974, as amended by the Federal
Energy Administration Authorization Act of 1977. (15 U.S.C. 788; FEAA)
Section 32 essentially provides in relevant part that, where a proposed
rule authorizes or requires use of commercial standards, the notice of
proposed rulemaking must inform the public of the use and background of
such standards. In addition, section 32(c) requires DOE to consult with
the Attorney General and the Chairman of the Federal Trade Commission
(FTC) concerning the impact of the commercial or industry standards on
competition.
The final rule incorporates by reference the testing methods
contained in HI 40.6-2014, ``Methods for Rotodynamic Pump Efficiency
Testing,'' except section 40.6.5.3, ``Test report;'' section A.7,
``Testing at temperatures exceeding 30 [deg]C (86 14;[deg]F);'' and
appendix B, ``Reporting of test results.'' In addition, the final
rule's definitions incorporate by reference the following standards:
(1) Sections 1.1, ``types and nomenclature,'' and 1.2.9,
``rotodynamic pump icons,'' of the 2014 version of ANSI/HI 1.1-1.2-
2014, ``American National Standard for Rotodynamic Centrifugal Pumps
for Nomenclature and Definitions;''
(2) section 2.1, ``types and nomenclature,'' of the 2014 version of
ANSI/HI 2.1-2.2, ``American National Standard for Rotodynamic Vertical
Pumps of Radial, Mixed, and Axial Flow Types for Nomenclature and
Definitions.''
(3) FM Class Number 1319, ``Approval Standard for Centrifugal Fire
Pumps
[[Page 4144]]
(Horizontal, End Suction Type),'' approved January 2015.
(4) NFPA 20-2016, ``Standard for the Installation of Stationary
Pumps for Fire Protection,'' approved 2016.
(5) ANSI/UL 448-2013, ``Standard for Safety Centrifugal Stationary
Pumps for Fire-Protection Service,'' approved 2013.
While this test procedure is not exclusively based on these
industry testing standards, some components of the DOE test procedure
adopt definitions, test parameters, measurement techniques, and
additional calculations from them without amendment. The Department has
evaluated these industry testing standards and is unable to conclude
whether they would fully comply with the requirements of section 32(b)
of the FEAA, (i.e., that they were developed in a manner that fully
provides for public participation, comment, and review). DOE has
consulted with both the Attorney General and the Chairman of the FTC
about the impact on competition of using the methods contained in this
standard, as well as the effects of the rule in general, if
promulgated. Regarding any impact on competition that the adopted test
procedure may have, the DOJ reviewed the April 2015 pumps test
procedure NOPR, attended the April 2015 NOPR public meeting, and
consulted with members of the industry in preparing their comments and
conclusions regarding any anticompetitive effects of the pumps test
procedure. In response to the proposed test procedure, DOJ commented
that it is not able to determine whether or not the proposed test
procedure (or associated energy conservation standard) will lessen
competition within the industry. However, DOJ noted that it is
concerned about the possibility of anticompetitive effects resulting
from the burden and expense of compliance. (DOJ, No. 14 at p. 2) In
response to DOJ's concern regarding the burden of conducting the test
procedure, DOE has revised several of the requirements, which DOE
believes will mitigate DOJ's (and manufacturers') concerns. DOE
addresses these concerns regarding the burden related to testing pumps
in accordance with the test procedure in section IV.B.
M. Congressional Notification
As required by 5 U.S.C. 801, DOE will report to Congress on the
promulgation of this rule before its effective date. The report will
state that it has been determined that the rule is not a ``major rule''
as defined by 5 U.S.C. 804(2).
N. Description of Materials Incorporated by Reference
In this final rule, DOE is incorporating by reference specific
sections from a method of test published by HI, titled ``Methods for
Rotodynamic Pump Efficiency Testing.'' Specifically, the test procedure
codified by this final rule references HI 40.6-2014, except section
40.6.5.3, ``Test report;'' section A.7, ``Testing at temperatures
exceeding 30 [deg]C (86[emsp14][deg]F);'' and appendix B, ``Reporting
of test results.'' HI 40.6-2014 is an industry-accepted standard used
to specify methods of testing for determining the head, flow rate, pump
power input, driver power input, pump power output, and other relevant
parameters necessary to determine the PEICL or
PEIVL of applicable pumps, as described in this final rule.
In addition, the final rule's definitions incorporate by reference
the following sections of the following standards:
(1) Sections 1.1, ``types and nomenclature,'' and 1.2.9,
``rotodynamic pump icons,'' of the 2014 version of ANSI/HI 1.1-1.2-
2014, ``American National Standard for Rotodynamic Centrifugal Pumps
for Nomenclature and Definitions;'' and
(2) section 2.1, ``types and nomenclature,'' of the 2014 version of
ANSI/HI 2.1-2.2, ``American National Standard for Rotodynamic Vertical
Pumps of Radial, Mixed, and Axial Flow Types for Nomenclature and
Definitions.''
(3) FM Class Number 1319, ``Approval Standard for Centrifugal Fire
Pumps (Horizontal, End Suction Type),'' approved January 2015.
(4) NFPA 20-2016, ``Standard for the Installation of Stationary
Pumps for Fire Protection,'' approved 2015.
(5) ANSI/UL 448-2013, ``Standard for Safety Centrifugal Stationary
Pumps for Fire-Protection Service,'' ANSI approved 2013.
ANSI/HI 1.1-1.2-2014 and ANSI/HI 2.1-2.2-2014 describe and define
specific pump characteristics relevant to the differentiation of pump
categories and configurations when applying the DOE test procedure. The
FM, NFPA, and ANSI/UL standards describe the relevant technical
characteristics and testing requirements to certify certain pumps as
fire pumps.
Copies of all HI standards may be purchased from the Hydraulic
Institute at 6 Campus Drive, First Floor North, Parsippany, NJ, 07054-
4406, or by going to www.pumps.org.
Copies of FM Class Number 1319 can be obtained from: FM Global,
1151 Boston-Providence Turnpike, P.O. Box 9102, Norwood, MA 02062,
(781) 762-4300. www.fmglobal.com.
Copies of NFPA 20-2016 can be obtained from: the National Fire
Protection Association, 1 Batterymarch Park, Quincy, MA 02169, (617)
770-3000. www.nfpa.org.
Copies of ANSI/UL 448-2013 can be obtained from: UL, 333 Pfingsten
Road, Northbrook, IL 60062, (847) 272-8800. http://ul.com.
V. Approval of the Office of the Secretary
The Secretary of Energy has approved publication of this final
rule.
List of Subjects
10 CFR Part 429
Administrative practice and procedure, Confidential business
information, Energy conservation, Imports, Intergovernmental relations,
Small businesses.
10 CFR Part 431
Administrative practice and procedure, Confidential business
information, Energy conservation, Imports, Incorporation by reference,
Intergovernmental relations, Small businesses.
Issued in Washington, DC, on December 30, 2015.
Kathleen B. Hogan,
Deputy Assistant Secretary for Energy Efficiency, Energy Efficiency and
Renewable Energy.
For the reasons stated in the preamble, DOE amends parts 429 and
431 of Chapter II, subchapter D of Title 10, Code of Federal
Regulations as set forth below:
PART 429--CERTIFICATION, COMPLIANCE, AND ENFORCEMENT FOR CONSUMER
PRODUCTS AND COMMERCIAL AND INDUSTRIAL EQUIPMENT
0
1. The authority citation for part 429 continues to read as follows:
Authority: 42 U.S.C. 6291-6317.
0
2. In Sec. 429.2 revise paragraph (a) to read as follows:
Sec. 429.2 Definitions.
(a) The definitions found in Sec. Sec. 430.2, 431.2, 431.62,
431.72, 431.82, 431.92, 431.102, 431.132, 431.152, 431.172, 431.192,
431.202, 431.222, 431.242, 431.262, 431.282, 431.292, 431.302, 431.322,
431.442 and 431.462 of this chapter apply for purposes of this part.
* * * * *
Sec. 429.11 [Amended]
0
3. In paragraphs (a) and (b) remove ``429.54'' and add ``429.62'' in
its place.
0
4. Add Sec. 429.59 to read as follows:
[[Page 4145]]
Sec. 429.59 Pumps.
(a) Determination of represented value. Manufacturers must
determine the represented value, which includes the certified rating,
for each basic model by testing (which includes the calculation-based
methods in the test procedure), in conjunction with the following
sampling provisions. Manufacturers must update represented values to
account for any change in the applicable motor standards in Sec.
431.25 of this chapter and certify amended values as of the next annual
certification.
(1) Units to be tested. The requirements of Sec. 429.11 are
applicable to pumps; and for each basic model, a sample of sufficient
size shall be randomly selected and tested to ensure that--
(i) Any value of the constant or variable load pump energy index or
other measure of energy consumption must be greater than or equal to
the higher of:
(A) The mean of the sample, where:
[GRAPHIC] [TIFF OMITTED] TR25JA16.025
and x is the sample mean; n is the number of samples; and
xi is the maximum of the ith sample;
Or,
(B) The upper 95 percent confidence limit (UCL) of the true mean
divided by 1.05, where:
[GRAPHIC] [TIFF OMITTED] TR25JA16.026
and x is the sample mean; s is the sample standard deviation; n is
the number of samples; and t0.95 is the t statistic for a 95
percent one-tailed confidence interval with n-1 degrees of freedom
(from appendix A to subpart B of part 429);
and
(ii) Any measure of energy efficiency of a basic model must be less
than or equal to the lower of:
(A) The mean of the sample, where:
[GRAPHIC] [TIFF OMITTED] TR25JA16.027
and x is the sample mean; n is the number of samples; and
xi is the maximum of the ith sample;
Or,
(B) The lower 95 percent confidence limit (LCL) of the true mean
divided by 0.95, where:
[GRAPHIC] [TIFF OMITTED] TR25JA16.028
and x is the sample mean; s is the sample standard deviation; n is
the number of samples; and t0.95 is the t statistic for a 95
percent one-tailed confidence interval with n-1 degrees of freedom
(from appendix A of subpart B).
(b) [Reserved]
Sec. 429.70 [Amended]
0
5. Amend Sec. 429.70(a) by removing ``429.54'' and adding ``429.62''
in its place.
0
6. In Sec. 429.71, add paragraph (d) to read as follows:
Sec. 429.71 Maintenance of records.
* * * * *
(d) When considering if a pump is subject to energy conservation
standards under part 431 of this chapter, DOE may need to determine if
a pump was designed and constructed to the requirements set forth in
Military Specifications: MIL-P-17639F, MIL-P-17881D, MIL-P-17840C, MIL-
P-18682D, or MIL-P-18472G. In this case, a manufacturer must provide
DOE with copies of the original design and test data that were
submitted to appropriate design review agencies, as required by MIL-P-
17639F, MIL-P-17881D, MIL-P-17840C, MIL-P-18682D, or MIL-P-18472G.
Military specifications and standards are available for review at
http://everyspec.com/MIL-SPECS.
Sec. 429.72 [Amended]
0
7. Amend Sec. 429.72(a) by removing ``429.54'' and adding in its place
``429.62''.
Sec. 429.102 [Amended]
0
8. Amend Sec. 429.102(a)(1) by removing ``429.54'' and adding in its
place ``429.62''.
0
9. Section 429.110 is amended by:
0
a. Redesignating paragraphs (e)(1)(iv) through (vi) as (e)(1)(v)
through (vii), respectively; and
0
b. Adding a new paragraph (e)(1)(iv).
The addition reads as follows:
Sec. 429.110 Enforcement testing.
* * * * *
(e) * * *
(1) * * *
(iv) For pumps, DOE will use an initial sample size of not more
than four units and will determine compliance based on the arithmetic
mean of the sample.
* * * * *
0
10. Section 429.134 is amended by adding paragraph (h) to read as
follows:
Sec. 429.134 Product-specific enforcement provisions.
* * * * *
(h) Pumps. (1) The volume rate of flow (flow rate) at BEP and
nominal speed of rotation of each tested unit of the basic model will
be measured pursuant to the test requirements of Sec. 431.464 of this
chapter, where the value of volume rate of flow (flow rate) at BEP and
nominal speed of rotation certified by the manufacturer will be treated
as the expected BEP flow rate. The results of the measurement(s) will
be compared to the value of volume rate of flow (flow rate) at BEP and
nominal speed of rotation certified by the manufacturer. The certified
volume rate of flow (flow rate) at BEP and nominal speed of rotation
will be considered valid only if the measurement(s) (either the
measured volume rate of flow (flow rate) at BEP and nominal speed of
rotation for a single unit sample or the average of the measured flow
rates for a multiple unit sample) is within five percent of the
certified volume rate of flow (flow rate) at BEP and nominal speed of
rotation.
(i) If the representative value of volume rate of flow (flow rate)
at BEP and nominal speed of rotation is found to be valid, the measured
volume rate of flow (flow rate) at BEP and nominal speed of rotation
will be used in subsequent calculations of constant load pump energy
rating (PERCL) and constant load pump energy index
(PEICL) or variable load pump energy rating
(PERVL) and variable load pump energy index
(PEIVL) for that basic model.
(ii) If the representative value of volume rate of flow (flow rate)
at BEP and nominal speed of rotation is found to be invalid, the mean
of all the measured volume rate of flow (flow rate) at BEP and nominal
speed of rotation values determined from the tested unit(s) will serve
as the new expected BEP flow rate and the unit(s) will be retested
until such time as the measured volume rate of flow (flow rate) at BEP
and nominal speed of rotation is within 5 percent of the expected BEP
flow rate.
(2) DOE will test each pump unit according to the test method
specified by the manufacturer in the certification report submitted
pursuant to Sec. 429.59(b).
PART 431--ENERGY EFFICIENCY PROGRAM FOR CERTAIN COMMERCIAL AND
INDUSTRIAL EQUIPMENT
0
11. The authority citation for part 431 continues to read as follows:
Authority: 42 U.S.C. 6291-6317.
0
12. Add subpart Y to part 431 to read as follows:
Subpart Y--Pumps
Sec.
[[Page 4146]]
431.461 Purpose and scope.
431.462 Definitions.
431.463 Materials incorporated by reference.
431.464 Test procedure for measuring and determining energy
consumption of pumps.
Appendix A to Subpart Y of Part 431--Uniform Test Method for the
Measurement of Energy Consumption of Pumps
Subpart Y--Pumps
Sec. 431.461 Purpose and scope.
This subpart contains definitions, test procedures, and energy
conservation requirements for pumps, pursuant to Part A-1 of Title III
of the Energy Policy and Conservation Act, as amended, 42 U.S.C. 6311-
6317.
Sec. 431.462 Definitions.
The following definitions are applicable to this subpart, including
appendix A. In cases where there is a conflict, the language of the
definitions adopted in this section takes precedence over any
descriptions or definitions found in the 2014 version of ANSI/HI 1.1-
1.2, ``American National Standard for Rotodynamic Centrifugal Pumps for
Nomenclature and Definitions'' (ANSI/HI 1.1-1.2-2014) (incorporated by
reference, see Sec. 431.463), or the 2014 version of ANSI/HI 2.1-2.2,
``American National Standard for Rotodynamic Vertical Pumps of Radial,
Mixed, and Axial Flow Types for Nomenclature and Definitions'' (ANSI/HI
2.1-2.2-2014) (incorporated by reference, see Sec. 431.463). In cases
where definitions reference design intent, DOE will consider marketing
materials, labels and certifications, and equipment design to determine
design intent.
Bare pump means a pump excluding mechanical equipment, driver, and
controls.
Basic model means all units of a given class of pump manufactured
by one manufacturer, having the same primary energy source, and having
essentially identical electrical, physical, and functional (or
hydraulic) characteristics that affect energy consumption, energy
efficiency, water consumption, or water efficiency; except that:
(1) For RSV and ST pumps, all variations in numbers of stages of
the bare pump must be considered a single basic model;
(2) Pump models for which the bare pump differs in impeller
diameter, or impeller trim, may be considered a single basic model; and
(3) Pump models for which the bare pump differs in number of stages
or impeller diameter and which are sold with motors (or motors and
controls) of varying horsepower may only be considered a single basic
model if:
(i) for ESCC, ESFM, IL, and RSV pumps, each motor offered in the
basic model has a nominal full load motor efficiency rated at the
Federal minimum (see the current table for NEMA Design B motors at 10
CFR 431.25) or the same number of bands above the Federal minimum for
each respective motor horsepower (see Table 3 of Appendix A to Subpart
Y of Part 431); or
(ii) for ST pumps, each motor offered in the basic model has a full
load motor efficiency at the default nominal full load submersible
motor efficiency shown in Table 2 of appendix A to subpart Y of part
431 or the same number of bands above the default nominal full load
submersible motor efficiency for each respective motor horsepower (see
Table 3 of Appendix A to Subpart Y of Part 431).
Best efficiency point (BEP) means the pump hydraulic power
operating point (consisting of both flow and head conditions) that
results in the maximum efficiency.
Bowl diameter means the maximum dimension of an imaginary straight
line passing through and in the plane of the circular shape of the
intermediate bowl of the bare pump that is perpendicular to the pump
shaft and that intersects the outermost circular shape of the
intermediate bowl of the bare pump at both of its ends, where the
intermediate bowl is as defined in ANSI/HI 2.1-2.2-2014.
Clean water pump means a pump that is designed for use in pumping
water with a maximum non-absorbent free solid content of 0.016 pounds
per cubic foot, and with a maximum dissolved solid content of 3.1
pounds per cubic foot, provided that the total gas content of the water
does not exceed the saturation volume, and disregarding any additives
necessary to prevent the water from freezing at a minimum of
14[emsp14][deg]F.
Close-coupled pump means a pump in which the motor shaft also
serves as the impeller shaft for the bare pump.
Continuous control means a control that adjusts the speed of the
pump driver continuously over the driver operating speed range in
response to incremental changes in the required pump flow, head, or
power output.
Control means any device that can be used to operate the driver.
Examples include, but are not limited to, continuous or non-continuous
controls, schedule-based controls, on/off switches, and float switches.
Driver means the machine providing mechanical input to drive a bare
pump directly or through the use of mechanical equipment. Examples
include, but are not limited to, an electric motor, internal combustion
engine, or gas/steam turbine.
Dry rotor pump means a pump in which the motor rotor is not
immersed in the pumped fluid.
End suction close-coupled (ESCC) pump means a close-coupled, dry
rotor, end suction pump that has a shaft input power greater than or
equal to 1 hp and less than or equal to 200 hp at BEP and full impeller
diameter and that is not a dedicated-purpose pool pump. Examples
include, but are not limited to, pumps within the specified horsepower
range that comply with ANSI/HI nomenclature OH7, as described in ANSI/
HI 1.1-1.2-2014.
End suction frame mounted/own bearings (ESFM) pump means a
mechanically-coupled, dry rotor, end suction pump that has a shaft
input power greater than or equal to 1 hp and less than or equal to 200
hp at BEP and full impeller diameter and that is not a dedicated-
purpose pool pump. Examples include, but are not limited to, pumps
within the specified horsepower range that comply with ANSI/HI
nomenclature OH0 and OH1, as described in ANSI/HI 1.1-1.2-2014.
End suction pump means a single-stage, rotodynamic pump in which
the liquid enters the bare pump in a direction parallel to the impeller
shaft and on the side opposite the bare pump's driver-end. The liquid
is discharged through a volute in a plane perpendicular to the shaft.
Fire pump means a pump that is compliant with NFPA 20-2016
(incorporated by reference, see Sec. 431.463), ``Standard for the
Installation of Stationary Pumps for Fire Protection,'' and is either:
(1) UL listed under ANSI/UL 448-2013 (incorporated by reference,
see Sec. 431.463), ``Standard for Safety Centrifugal Stationary Pumps
for Fire-Protection Service,'' or
(2) FM Global (FM) approved under the January 2015 edition of FM
Class Number 1319, ``Approval Standard for Centrifugal Fire Pumps
(Horizontal, End Suction Type),'' (incorporated by reference, see Sec.
431.463).
Full impeller diameter means the maximum diameter impeller with
which a given pump basic model is distributed in commerce.
Horizontal motor means a motor that requires the motor shaft to be
in a horizontal position to function as designed, as specified in the
manufacturer literature.
In-line (IL) pump means a pump that is either a twin-head pump or a
single-stage, single-axis flow, dry rotor, rotodynamic pump that has a
shaft
[[Page 4147]]
input power greater than or equal to 1 hp and less than or equal to 200
hp at BEP and full impeller diameter, in which liquid is discharged
through a volute in a plane perpendicular to the shaft. Such pumps do
not include pumps that are mechanically coupled or close-coupled, have
a pump power output that is less than or equal to 5 hp at BEP at full
impeller diameter, and are distributed in commerce with a horizontal
motor. Examples of in-line pumps include, but are not limited to, pumps
within the specified horsepower range that comply with ANSI/HI
nomenclature OH3, OH4, or OH5, as described in ANSI/HI 1.1-1.2-2014.
Magnet driven pump means a pump in which the bare pump is isolated
from the motor via a containment shell and torque is transmitted from
the motor to the bare pump via magnetic force. The motor shaft is not
physically coupled to the impeller or impeller shaft.
Mechanical equipment means any component of a pump that transfers
energy from the driver to the bare pump.
Mechanically-coupled pump means a pump in which the bare pump has
its own impeller shaft and bearings and so does not rely on the motor
shaft to serve as the impeller shaft.
Non-continuous control means a control that adjusts the speed of a
driver to one of a discrete number of non-continuous preset operating
speeds, and does not respond to incremental reductions in the required
pump flow, head, or power output.
Prime-assist pump means a pump that:
(1) Is designed to lift liquid that originates below the centerline
of the pump inlet;
(2) Requires no manual intervention to prime or re-prime from a
dry-start condition; and
(3) Includes a device, such as a vacuum pump or air compressor and
venturi eductor, to remove air from the suction line in order to
automatically perform the prime or re-prime function at any point
during the pump's operating cycle.
Pump means equipment designed to move liquids (which may include
entrained gases, free solids, and totally dissolved solids) by physical
or mechanical action and includes a bare pump and, if included by the
manufacturer at the time of sale, mechanical equipment, driver, and
controls.
Radially split, multi-stage, vertical, in-line diffuser casing
(RSV) pump means a vertically suspended, multi-stage, single axis flow,
dry rotor, rotodynamic pump:
(1) That has a shaft input power greater than or equal to 1 hp and
less than or equal to 200 hp at BEP and full impeller diameter and at
the number of stages required for testing and
(2) In which liquid is discharged in a place perpendicular to the
impeller shaft; and
(3) For which each stage (or bowl) consists of an impeller and
diffuser;
(4) For which no external part of such a pump is designed to be
submerged in the pumped liquid; and
(5) Examples include, but are not limited to, pumps complying with
ANSI/HI nomenclature VS8, as described in ANSI/HI 2.1-2.2-2014.
Rotodynamic pump means a pump in which energy is continuously
imparted to the pumped fluid by means of a rotating impeller,
propeller, or rotor.
Self-priming pump means a pump that:
(1) Is designed to lift liquid that originates below the centerline
of the pump inlet;
(2) Contains at least one internal recirculation passage; and
(3) Requires a manual filling of the pump casing prior to initial
start-up, but is able to re-prime after the initial start-up without
the use of external vacuum sources, manual filling, or a foot valve.
Single axis flow pump means a pump in which the liquid inlet of the
bare pump is on the same axis as the liquid discharge of the bare pump.
Submersible turbine (ST) pump means a single-stage or multi-stage,
dry rotor, rotodynamic pump that is designed to be operated with the
motor and stage(s) fully submerged in the pumped liquid; that has a
shaft input power greater than or equal to 1 hp and less than or equal
to 200 hp at BEP and full impeller diameter and at the number of stages
required for testing; and in which each stage of this pump consists of
an impeller and diffuser, and liquid enters and exits each stage of the
bare pump in a direction parallel to the impeller shaft. Examples
include, but are not limited to, pumps within the specified horsepower
range that comply with ANSI/HI nomenclature VS0, as described in ANSI/
HI 2.1-2.2-2014.
Twin head pump means a dry rotor, single-axis flow, rotodynamic
pump that contains two impeller assemblies, which both share a common
casing, inlet, and discharge, and each of which
(1) Contains an impeller, impeller shaft (or motor shaft in the
case of close-coupled pumps), shaft seal or packing, driver (if
present), and mechanical equipment (if present);
(2) Has a shaft input power that is greater than or equal to 1 hp
and less than or equal to 200 hp at best efficiency point (BEP) and
full impeller diameter;
(3) Has the same primary energy source (if sold with a driver) and
the same electrical, physical, and functional characteristics that
affect energy consumption or energy efficiency;
(4) Is mounted in its own volute; and
(5) Discharges liquid through its volute and the common discharge
in a plane perpendicular to the impeller shaft.
Sec. 431.463 Materials incorporated by reference.
(a) General. DOE incorporates by reference the following standards
into subpart Y of part 431. The material listed has been approved for
incorporation by reference by the Director of the Federal Register in
accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Any subsequent
amendment to a standard by the standard-setting organization will not
affect the DOE test procedures unless and until amended by DOE.
Material is incorporated as it exists on the date of the approval and a
notice of any change in the material will be published in the Federal
Register. All approved material is available for inspection at the
National Archives and Records Administration (NARA). For information on
the availability of this material at NARA, call 202-741-6030, or go to:
www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html. Also, this material is available for inspection at
U.S. Department of Energy, Office of Energy Efficiency and Renewable
Energy, Building Technologies Program, Sixth Floor, 950 L'Enfant Plaza
SW., Washington, DC 20024, (202) 586-2945, or go to: http://www1.eere.energy.gov/buildings/appliance_standards. These standards can
be obtained from the sources below.
(b) FM. FM Global, 1151 Boston-Providence Turnpike, P.O. Box 9102,
Norwood, MA 02062, (781) 762-4300. www.fmglobal.com.
(1) FM Class Number 1319, ``Approval Standard for Centrifugal Fire
Pumps (Horizontal, End Suction Type),'' January 2015, IBR approved for
Sec. 431.462.
(2) [Reserved]
(c) HI. Hydraulic Institute, 6 Campus Drive, First Floor North,
Parsippany, NJ 07054-4406, 973-267-9700. www.Pumps.org.
(1) ANSI/HI 1.1-1.2-2014, (``ANSI/HI 1.1-1.2-2014''), ``American
National Standard for Rotodynamic Centrifugal Pumps for Nomenclature
and Definitions,'' approved October 30, 2014, section 1.1, ``Types and
[[Page 4148]]
nomenclature,'' and section 1.2.9, ``Rotodynamic pump icons,'' IBR
approved for Sec. 431.462.
(2) ANSI/HI 2.1-2.2-2014, (``ANSI/HI 2.1-2.2-2014''), ``American
National Standard for Rotodynamic Vertical Pumps of Radial, Mixed, and
Axial Flow Types for Nomenclature and Definitions,'' approved April 8,
2014, section 2.1, ``Types and nomenclature,'' IBR approved for Sec.
431.462.
(3) HI 40.6-2014, (``HI 40.6-2014''), ``Methods for Rotodynamic
Pump Efficiency Testing,'' (except section 40.6.5.3, ``Test report;''
Appendix A, section A.7, ``Testing at temperatures exceeding 30 [deg]C
(86[emsp14][deg]F);'' and Appendix B, ``Reporting of test results
(normative);'') copyright 2014, IBR approved for appendix A to subpart
Y of part 431.
(d) NFPA. National Fire Protection Association, 1 Batterymarch
Park, Quincy, MA 02169-7471, (617) 770-3000. www.nfpa.org.
(1) NFPA 20, (``NFPA 20-2016''), ``Standard for the Installation of
Stationary Pumps for Fire Protection,'' 2016 Edition, approved June 15,
2015, IBR approved for Sec. 431.462.
(2) [Reserved]
(e) UL. UL, 333 Pfingsten Road, Northbrook, IL 60062, (847) 272-
8800. ul.com.
(1) UL 448, (``ANSI/UL 448-2013''), ``Standard for Safety
Centrifugal Stationary Pumps for Fire-Protection Service,'' 10th
Edition, June 8, 2007, including revisions through July 12, 2013, IBR
approved for Sec. 431.462.
(2) [Reserved]
Sec. 431.464 Test procedure for measuring and determining energy
consumption of pumps
(a) Scope. This section provides the test procedures for
determining the constant and variable load pump energy index for:
(1) The following categories of clean water pumps:
(i) End suction close-coupled (ESCC);
(ii) End suction frame mounted/own bearings (ESFM);
(iii) In-line (IL);
(iv) Radially split, multi-stage, vertical, in-line casing diffuser
(RSV); and
(v) Submersible turbine (ST) pumps
(2) With the following characteristics:
(i) Flow rate of 25 gpm or greater at BEP and full impeller
diameter;
(ii) Maximum head of 459 feet at BEP and full impeller diameter and
the number of stages required for testing (see section 1.2.2 of
appendix A of this subpart);
(iii) Design temperature range from 14 to 248[emsp14][deg]F;
(iv) Designed to operate with either: (1) a 2- or 4-pole induction
motor, or (2) a non-induction motor with a speed of rotation operating
range that includes speeds of rotation between 2,880 and 4,320
revolutions per minute and/or 1,440 and 2,160 revolutions per minute,
and in either case, the driver and impeller must rotate at the same
speed;
(v) For ST pumps, a 6-inch or smaller bowl diameter; and
(vi) For ESCC and ESFM pumps, a specific speed less than or equal
to 5000 when calculated using U.S. customary units.
(3) Except for the following pumps:
(i) Fire pumps;
(ii) Self-priming pumps;
(iii) Prime-assist pumps;
(iv) Magnet driven pumps;
(v) Pumps designed to be used in a nuclear facility subject to 10
CFR part 50, ``Domestic Licensing of Production and Utilization
Facilities;'' and
(vi) Pumps meeting the design and construction requirements set
forth in Military Specifications: MIL-P-17639F, ``Pumps, Centrifugal,
Miscellaneous Service, Naval Shipboard Use'' (as amended); MIL-P-
17881D, ``Pumps, Centrifugal, Boiler Feed, (Multi-Stage)'' (as
amended); MIL-P-17840C, ``Pumps, Centrifugal, Close-Coupled, Navy
Standard (For Surface Ship Application)'' (as amended); MIL-P-18682D,
``Pump, Centrifugal, Main Condenser Circulating, Naval Shipboard'' (as
amended); and MIL-P-18472G, ``Pumps, Centrifugal, Condensate, Feed
Booster, Waste Heat Boiler, And Distilling Plant'' (as amended).
Military specifications and standards are available for review at
http://everyspec.com/MIL-SPECS.
(b) Testing and calculations. Determine the applicable constant
load pump energy index (PEICL) or variable load pump energy
index (PEIVL) using the test procedure set forth in appendix
A of this subpart Y.
Appendix A to Subpart Y of Part 431--Uniform Test Method for the
Measurement of Energy Consumption of Pumps
Note: Starting on July 25, 2016, any representations made with
respect to the energy use or efficiency of pumps subject to testing
pursuant to 10 CFR 431.464 must be made in accordance with the
results of testing pursuant to this appendix.
I. Test Procedure for Pumps
A. General. To determine the constant load pump energy index
(PEICL) for bare pumps and pumps sold with electric
motors or the variable load pump energy index (PEIVL) for
pumps sold with electric motors and continuous or non-continuous
controls, perform testing in accordance with HI 40.6-2014, except
section 40.6.5.3, ``Test report;'' section A.7, ``Testing at
temperatures exceeding 30 [deg]C (86[emsp14][deg]F);'' and appendix
B, ``Reporting of test results;'' (incorporated by reference, see
Sec. 431.463) with the modifications and additions as noted
throughout the provisions below. Where HI 40.6-2014 refers to
``pump,'' the term refers to the ``bare pump,'' as defined in Sec.
431.462. Also, for the purposes of applying this appendix, the term
``volume per unit time,'' as defined in section 40.6.2, ``Terms and
definitions,'' of HI 40.6-2014 shall be deemed to be synonymous with
the term ``flow rate'' used throughout that standard and this
appendix. In addition, the specifications of section 40.6.4.1 of HI
40.6-2014 do not apply to ST pumps and the performance of ST bare
pumps considers the bowl performance only.
A.1 Scope. Section II of this appendix is applicable to all
pumps and describes how to calculate the pump energy index (section
II.A) based on the pump energy rating for the minimally compliant
reference pump (PERSTD; section II.B) and the constant
load pump energy rating (PERCL) or variable load pump
energy rating (PERVL) determined in accordance with one
of sections III through VII of this appendix, based on the
configuration in which the pump is distributed in commerce and the
applicable testing method specified in sections III through VII and
as described in Table 1 of this appendix.
Table 1--Applicability of Calculation-Based and Testing-Based Test
Procedure Options Based on Pump Configuration
------------------------------------------------------------------------
Pump sub- Applicable test
Pump configuration configuration methods
------------------------------------------------------------------------
Bare Pump................... Bare Pump........... Section III: Test
OR.................. Procedure for Bare
Pump + Single-Phase Pumps.
Induction Motor.
OR..................
Pump + Driver Other
Than Electric Motor.
[[Page 4149]]
Pump + Motor *.............. Pump + Polyphase Section IV: Testing-
Motor Covered by Based Approach for
DOE's Electric Pumps Sold with
Motor Energy Motors
Conservation OR
Standards **. Section V:
OR.................. Calculation-Based
Pump + Submersible Approach for Pumps
Motor. Sold with Motors.
Pump + Motor Not Section IV: Testing-
Covered by DOE's Based Approach for
Electric Motor Pumps Sold with
Energy Conservation Motors.
Standards (Except
Submersible Motors)
** ***.
Pump + Motor + Continuous Pump + Polyphase Section VI: Testing-
Controls. Motor Covered by Based Approach for
OR.......................... DOE's Electric Pumps Sold with
Pump + Motor + Non- Motor Energy Motors and Controls
Continuous Controls. Conservation OR
Standards** + Section VII:
Continuous Control. Calculation-Based
OR.................. Approach for Pumps
Pump + Submersible Sold with Motors
Motor + Continuous Controls.
Control.
Pump + Polyphase Section VI: Testing-
Motor Covered by Based Approach for
DOE's Electric Pumps Sold with
Motor Energy Motors and
Conservation Controls.
Standards** + Non-
Continuous Control.
OR..................
Pump + Submersible
Motor + Non-
Continuous Control.
Pump + Motor Not Section VI: Testing-
Covered by DOE's Based Approach for
Electric Motor Pumps Sold with
Energy Conservation Motors and
Standards (Except Controls.
Submersible Motors)
** *** + Continuous
or Non-Continuous
Controls.
------------------------------------------------------------------------
* Also applies if unit is sold with controls other than continuous or
non-continuous controls (e.g., ON/OFF switches).
** All references to ``Motors Covered by DOE's Electric Motor Energy
Conservation Standards'' refer to those listed at Sec. 431.25(g) of
this chapter.
*** Includes pumps sold with single-phase induction motors.
A.2 Section III of this appendix addresses the test procedure
applicable to bare pumps. This test procedure also applies to pumps
sold with drivers other than motors and pumps sold with single-phase
induction motors.
A.3 Section IV of this appendix addresses the testing-based
approach for pumps sold with motors, which is applicable to all
pumps sold with electric motors, including single-phase induction
motors. This test procedure also applies to pumps sold with controls
other than continuous or non-continuous controls (e.g., on/off
switches).
A.4 Section V of this appendix addresses the calculation-based
approach for pumps sold with motors, which applies to:
(1) Pumps sold with polyphase electric motors regulated by DOE's
energy conservation standards for electric motors at Sec.
431.25(g), and
(2) Pumps sold with submersible motors.
A.5 Section VI of this appendix addresses the testing-based
approach for pumps sold with motors and controls, which is
applicable to all pumps sold with electric motors (including single-
phase induction motors) and continuous or non-continuous controls.
A.6 Section VII of this appendix discusses the calculation-based
approach for pumps sold with motors and controls, which applies to:
(1) Pumps sold with polyphase electric motors regulated by DOE's
energy conservation standards for electric motors at Sec. 431.25(g)
and continuous controls and
(2) Pumps sold with submersible motors and continuous controls.
B. Measurement Equipment. For the purposes of measuring pump
power input, driver power input to the motor or controls, and pump
power output, the equipment specified in HI 40.6-2014 Appendix C
(incorporated by reference, see Sec. 431.463) necessary to measure
head, speed of rotation, flow rate, temperature, torque, and
electrical power must be used and must comply with the stated
accuracy requirements in HI 40.6-2014 Table 40.6.3.2.3 except as
noted in sections III.B, IV.B, V.B, VI.B, and VII.B of this
appendix. When more than one instrument is used to measure a given
parameter, the combined accuracy, calculated as the root sum of
squares of individual instrument accuracies, must meet the specified
accuracy requirements.
C. Test Conditions. Conduct testing at full impeller diameter in
accordance with the test conditions, stabilization requirements, and
specifications of HI 40.6-2014 (incorporated by reference, see Sec.
431.463) section 40.6.3, ``Pump efficiency testing;'' section
40.6.4, ``Considerations when determining the efficiency of a
pump;'' section 40.6.5.4 (including appendix A), ``Test
arrangements;'' and section 40.6.5.5, ``Test conditions.''. For ST
pumps, head measurements must be based on the bowl assembly total
head as described in section A.5 of 40.6-2014 and the pump power
input or driver power input, as applicable, must be based on the
measured input power to the driver or bare pump, respectively;
section 40.6.4.1, ``vertically suspended pumps,'' does not apply to
ST pumps.
C.1 Nominal Speed of Rotation. Determine the nominal speed of
rotation based on the range of speeds of rotation at which the pump
is designed to operate, in accordance with sections I.C.1.1,
I.C.1.2, I.C.1.3, I.C.1.4, or I.C.1.5 of this appendix, as
applicable. When determining the range of speeds at which the pump
is designed to operate, DOE will refer to published data, marketing
literature, and other publically-available information about the
pump model and motor, as applicable.
C.1.1 For pumps sold without motors, select the nominal speed of
rotation based on the speed for which the pump is designed. For bare
pumps designed for speeds of rotation including 2,880 to 4,320
revolutions per minute (rpm), the nominal speed of rotation shall be
3,600 rpm. For bare pumps designed for speeds of rotation including
1,440 to 2,160 rpm, the nominal speed of rotation shall be 1,800
rpm.
C.1.2 For pumps sold with 4-pole induction motors, the nominal
speed of rotation shall be 1,800 rpm.
C.1.3 For pumps sold with 2-pole induction motors, the nominal
speed of rotation shall be 3,600 rpm.
C.1.4 For pumps sold with non-induction motors where the
operating range of the pump and motor includes speeds of rotation
between 2,880 and 4,320 rpm, the nominal speed of rotation shall be
3,600 rpm.
C.1.5 For pumps sold with non-induction motors where the
operating range of the pump and motor includes speeds of rotation
between 1,440 and 2,160 rpm, the nominal speed of rotation shall be
1,800 rpm.
C.2 Multi-stage Pumps. For RSV and ST pumps, perform testing on
the pump with three stages for RSV pumps and nine stages for ST
pumps. If the basic model of pump being tested is only available
with fewer than the required number of stages, test the pump with
the maximum number of stages with which the basic model is
distributed in commerce in the United States. If the basic model of
pump being tested is only available with greater than the required
number of stages, test the pump with the lowest number
[[Page 4150]]
of stages with which the basic model is distributed in commerce in
the United States. If the basic model of pump being tested is
available with both fewer and greater than the required number of
stages, but not the required number of stages, test the pump with
the number of stages closest to the required number of stages. If
both the next lower and next higher number of stages are
equivalently close to the required number of stages, test the pump
with the next higher number of stages.
C.3 Twin Head Pumps. For twin head pumps, perform testing on an
equivalent single impeller IL pump, constructed by incorporating one
of the driver and impeller assemblies of the twin head pump being
rated into an adequate, IL style, single impeller volute and casing.
An adequate, IL style, single impeller volute and casing means a
volute and casing for which any physical and functional
characteristics that affect energy consumption and energy efficiency
are the same to their corresponding characteristics for a single
impeller in the twin head pump volute and casing.
D. Data Collection and Analysis
D.1 Damping Devices. Use of damping devices, as described in
section 40.6.3.2.2 of HI 40.6-2014 (incorporated by reference, see
Sec. 431.463), are only permitted to integrate up to the data
collection interval used during testing.
D.2 Stabilization. Record data at any tested load point only
under stabilized conditions, as defined in HI 40.6-2014 section
40.6.5.5.1 (incorporated by reference, see Sec. 431.463), where a
minimum of two measurements are used to determine stabilization.
D.3 Calculations and Rounding. Normalize all measured data to
the nominal speed of rotation of 3,600 or 1,800 rpm based on the
nominal speed of rotation selected for the pump in section I.C.1 of
this appendix, in accordance with the procedures specified in
section 40.6.6.1.1 of HI 40.6-2014 (incorporated by reference, see
Sec. 431.463). Except for the ``expected BEP flow rate,'' all terms
and quantities refer to values determined in accordance with the
procedures set forth in this appendix for the rated pump. Perform
all calculations using raw measured values without rounding. Round
PERCL and PERVL to three significant digits,
and round PEICL, and PEIVL values, as
applicable, to the hundredths place (i.e., 0.01).
D.4 Pumps with BEP at Run Out.
Test pumps for which the expected BEP corresponds to a volume
rate of flow that is within 20 percent of the expected maximum flow
rate at which the pump is designed to operate continuously or safely
(i.e., pumps with BEP at run-out) in accordance with the test
procedure specified in this appendix, but with the following
exceptions:
(1) Use the following seven flow points for determination of BEP
in sections III.D, IV.D, V.D, VI.D, and VII.D of this appendix
instead of those specified in those sections: 40, 50, 60, 70, 80,
90, and 100 percent of the expected.
(2) Use flow points of 60, 70, 80, 90, and 100 percent of the
expected maximum flow rate of the pump to determine pump power input
or driver power input at the specified load points in section
III.E.1.1, IV.E.1, V.E.1.1, VI.E.1, and VII.E.1.1 of this appendix
instead of those specified in those sections.
(3) To determine of PERCL and PERSTD, use
load points of 65, 90, and 100 percent of the BEP flow rate
determined with the modified flow points specified in this section
I.D.4 of this appendix instead of 75, 100, and 110 percent of BEP
flow.
II. Calculation of the Pump Energy Index
A. Determine the PEI of each tested pump based on the
configuration in which it is sold, as follows:
A.1. For pumps rated as bare pumps or pumps sold with motors,
determine the PEICL using the following equation:
[GRAPHIC] [TIFF OMITTED] TR25JA16.029
Where:
PEICL = the pump energy index for a constant load (hp),
PERCL = the pump energy rating for a constant load (hp),
determined in accordance with either section III (for bare pumps,
pumps sold with single-phase induction motors, and pumps sold with
drivers other than electric motors), section IV (for pumps sold with
motors and rated using the testing-based approach), or section V
(for pumps sold with motors and rated using the calculation-based
approach) of this appendix, and
PERSTD = the PERCL for a pump that is
minimally compliant with DOE's energy conservation standards with
the same flow and specific speed characteristics as the tested pump
(hp), as determined in accordance with section II.B of this
appendix.
A.2 For pumps rated as pumps sold with motors and continuous
controls or non-continuous controls, determine the PEIVL
using the following equation:
[GRAPHIC] [TIFF OMITTED] TR25JA16.030
Where:
PEIVL = the pump energy index for a variable load,
PERVL = the pump energy rating for a variable load (hp)
determined in accordance with section VI (for pumps sold with motors
and continuous or non-continuous controls rated using the testing-
based approach) or section VII of this appendix (for pumps sold with
motors and continuous controls rated using the calculation-based
approach), and
PERSTD = the PERCL for a pump that is
minimally compliant with DOE's energy conservation standards with
the same flow and specific speed characteristics as the tested pump
(hp), as determined in accordance with section II.B of this
appendix.
B. Determine the pump energy rating for the minimally compliant
reference pump (PERSTD), according to the following
equation:
[GRAPHIC] [TIFF OMITTED] TR25JA16.031
Where:
PERSTD = the PERCL for a pump that is
minimally compliant with DOE's energy conservation standards with
the same flow and specific speed characteristics as the tested pump
(hp),
[omega]i = 0.3333,
Pi\in,m\ = calculated driver power input to the motor at
load point i for the minimally compliant pump (hp), calculated in
accordance with section II.B.1of this appendix, and
i = load point corresponding to 75, 100, or 110 percent of the BEP
flow rate.
B.1. Determine the driver power input at each load point
corresponding to 75, 100, or 110 percent of the BEP flow rate as
follows:
[GRAPHIC] [TIFF OMITTED] TR25JA16.032
Where:
Pi\in,m\ = driver power input to the motor at load point
i (hp),
Pi = pump power input to the bare pump at load point i
(hp), calculated in accordance with section II.B.1.1 of this
appendix,
Li = the part load motor losses at load point i (hp),
calculated in accordance with section II.B.1.2 of this appendix, and
i = load point corresponding to 75, 100, or 110 percent of the BEP
flow rate.
B.1.1. Determine the pump power input to the minimally compliant
pump at each load point corresponding to 75, 100, or 110 percent of
the BEP flow rate as follows:
[GRAPHIC] [TIFF OMITTED] TR25JA16.033
Where:
Pi = pump power input to the bare pump at load point i
(hp),
[[Page 4151]]
[alpha]i = 0.947 for 75 percent of the BEP flow rate,
1.000 for 100 percent of the BEP flow rate, and 0.985 for 110
percent of the BEP flow rate;
Pu,i = the pump power output at load point i of the
tested pump (hp), as determined in accordance with section
II.B.1.1.2 of this appendix;
[eta]pump,STD = the minimally compliant pump efficiency
(%), calculated in accordance with section II.B.1.1.1 of this
appendix; and
i = load point corresponding to 75, 100, or 110 percent of the BEP
flow rate.
B.1.1.1 Calculate the minimally compliant pump efficiency based
on the following equation:
[eta]pump,STD = -0.8500 x
ln(Q100[percnt])\2\ -0.3800 x ln(Ns) x
ln(Q100[percnt]) - 11.480 x ln(Ns)\2\ + 17.800
x ln(Q100[percnt]) + 179.80 x ln(Ns) - (C +
555.60
Where:
[eta]pump,STD = minimally compliant pump efficiency (%),
Q100[percnt] = the BEP flow rate of the tested
pump at full impeller and nominal speed of rotation (gpm),
Ns = specific speed of the tested pump determined in accordance with
section II.B.1.1.1.1 of this appendix, and
C = the appropriate C-value for the category and nominal speed of
rotation of the tested pump, as listed at Sec. 431.466.
B.1.1.1.1 Determine the specific speed of the rated pump using
the following equation:
[GRAPHIC] [TIFF OMITTED] TR25JA16.034
Where:
Ns = specific speed,
nsp = the nominal speed of rotation (rpm),
Q100[percnt] = the measured BEP flow rate of
the tested pump at full impeller and nominal speed of rotation
(gpm),
H100[percnt] = pump total head at 100 percent
of the BEP flow rate of the tested pump at full impeller and nominal
speed of rotation (ft), and
S = the number of stages with which the pump is being rated.
B.1.1.2 Determine the pump power output at each load point
corresponding to 75, 100, or 110 percent of the BEP flow rate using
the following equation:
[GRAPHIC] [TIFF OMITTED] TR25JA16.035
Where:
Pu,i = the measured pump power output at load point i of
the tested pump (hp),
Qi = the measured flow rate at load point i of the tested
pump (gpm),
Hi = pump total head at load point i of the tested pump
(ft),
SG = the specific gravity of water at specified test conditions,
which is equivalent to 1.00, and
i = load point corresponding to 75, 100, or 110 percent of the BEP
flow rate.
B.1.2 Determine the motor part load losses at each load point
corresponding to 75, 100, or 110 percent of the BEP flow rate as
follows:
Li = Lfull x yi
Where:
Li = part load motor losses at load point i (hp),
Lfull = motor losses at full load (hp), as determined in
accordance with section II.B.1.2.1 of this appendix,
yi = part load loss factor at load point i determined in
accordance with section II.B.1.2.2 of this appendix, and
i = load point corresponding to 75, 100, or 110 percent of the BEP
flow rate.
B.1.2.1 Determine the full load motor losses using the
appropriate motor efficiency value and horsepower as shown in the
following equation:
[GRAPHIC] [TIFF OMITTED] TR25JA16.036
Where:
Lfull = motor losses at full load (hp),
MotorHP = the motor horsepower as determined in accordance with
section II.B.1.2.1.1 of this appendix (hp), and
[eta]motor,full = the default nominal full load motor
efficiency as determined in accordance with section II.B.1.2.1.2 of
this appendix (%).
B.1.2.1.1 Determine the motor horsepower as follows:
For bare pumps other than ST pumps, the motor
horsepower is determined as the horsepower rating listed in Table 2
of this appendix that is either equivalent to, or the next highest
horsepower greater than, the pump power input to the bare pump at
120 percent of the BEP flow rate of the tested pump.
For ST bare pumps, the motor horsepower is determined
as the horsepower rating listed in Table 2 of this appendix that, is
either equivalent to, or the next highest horsepower greater than,
the pump power input to the bare pump at 120 percent of the BEP flow
rate of the tested pump divided by a service factor of 1.15.
For pumps sold with motors, pumps sold with motors and
continuous controls, or pumps sold with motors and non-continuous
controls, the motor horsepower is the rated horsepower of the motor
with which the pump is being tested.
B.1.2.1.2 Determine the default nominal full load motor
efficiency as described in section II.B.1.2.1.2.1 of this appendix
for pumps other than ST pumps or II.B.1.2.1.2.2 of this appendix for
ST pumps.
B.1.2.1.2.1. For pumps other than ST pumps, the default nominal
full load motor efficiency is the minimum of the nominal full load
motor efficiency standards (open or enclosed) from the table
containing the current energy conservation standards for NEMA Design
B motors at Sec. 431.25, with the number of poles relevant to the
speed at which the pump is being tested (see section I.C.1 of this
appendix) and the motor horsepower determined in section
II.B.1.2.1.1 of this appendix.
B.1.2.1.2.2. For ST pumps, the default nominal full load motor
efficiency is the default nominal full load submersible motor
efficiency listed in Table 2 of this appendix, with the number of
poles relevant to the speed at which the pump is being tested (see
section I.C.1 of this appendix) and the motor horsepower determined
in section II.B.1.2.1.1 of this appendix.
B.1.2.2 Determine the part load loss factor at each load point
corresponding to 75, 100, or 110 percent of the BEP flow rate as
follows:
[GRAPHIC] [TIFF OMITTED] TR25JA16.037
Where:
yi = the part load loss factor at load point i,
Pi = pump power input to the bare pump at load point i
(hp),
MotorHP = the motor horsepower (hp), as determined in accordance
with section II.B.1.2.1.1 of this appendix,
[[Page 4152]]
[GRAPHIC] [TIFF OMITTED] TR25JA16.038
III. Test Procedure for Bare Pumps
A. Scope. This section III applies only to:
(1) Bare pumps,
(2) Pumps sold with drivers other than electric motors, and
(3) Pumps sold with single-phase induction motors.
B. Measurement Equipment. The requirements regarding measurement
equipment presented in section I.B of this appendix apply to this
section III, and in addition, when testing pumps using a calibrated
motor:
(1) Electrical measurement equipment must be capable of
measuring true RMS current, true RMS voltage, and real power up to
the 40th harmonic of fundamental supply source frequency, and
(2) Any instruments used to measure a particular parameter
specified in paragraph (1) must have a combined accuracy of 2.0 percent of the measured value at the fundamental supply
source frequency, where combined accuracy is the root sum of squares
of individual instrument accuracies.
C. Test Conditions. The requirements regarding test conditions
presented in section I.C of this appendix apply to this section III.
When testing pumps using a calibrated motor the following conditions
also apply to the mains power supplied to the motor:
(1) Maintain the voltage within 5 percent of the
rated value of the motor,
(2) Maintain the frequency within 1 percent of the
rated value of the motor,
(3) Maintain the voltage unbalance of the power supply within
3 percent of the rated values of the motor, and
(2) Maintain total harmonic distortion below 12 percent
throughout the test.
D. Testing BEP for the Pump. Determine the best efficiency point
(BEP) of the pump as follows:
D.1. Adjust the flow by throttling the pump without changing the
speed of rotation of the pump and conduct the test at a minimum of
the following seven flow points: 40, 60, 75, 90, 100, 110, and 120
percent of the expected BEP flow rate of the pump at the nominal
speed of rotation, as specified in HI 40.6-2014, except section
40.6.5.3, section A.7, and appendix B (incorporated by reference,
see Sec. 431.463).
D.2. Determine the BEP flow rate as the flow rate at the
operating point of maximum pump efficiency on the pump efficiency
curve, as determined in accordance with section 40.6.6.3 of HI 40.6-
2014 (incorporated by reference, see Sec. 431.463), where the pump
efficiency is the ratio of the pump power output divided by the pump
power input, as specified in Table 40.6.2.1 of HI 40.6-2014,
disregarding the calculations provided in section 40.6.6.2.
E. Calculating the Constant Load Pump Energy Rating. Determine
the PERCL of each tested pump using the following
equation:
[GRAPHIC] [TIFF OMITTED] TR25JA16.039
Where:
PERCL = the pump energy rating for a constant load (hp),
[omega]i = 0.3333,
Piin,m = calculated driver power input to the
motor at load point i (hp), as determined in accordance with section
III.E.1 of this appendix, and
i = load point corresponding to 75, 100, or 110 percent of the BEP
flow rate.
E.1 Determine the driver power input at each load point
corresponding to 75, 100, or 110 percent of the BEP flow rate as
follows:
[GRAPHIC] [TIFF OMITTED] TR25JA16.040
Where:
Pi\in,m\ = driver power input to the motor at load point
i (hp),
Pi = pump power input to the bare pump at load point i
(hp), as determined in section III.E.1.1 of this appendix,
Li = the part load motor losses at load point i (hp), as
determined in accordance with section III.E.1.2 of this appendix,
and
i = load point corresponding to 75, 100, or 110 percent of the BEP
flow rate.
E.1.1 Determine the pump power input at 75, 100, 110, and 120
percent of the BEP flow rate by employing a least squares regression
to determine a linear relationship between the pump power input at
the nominal speed of rotation of the pump and the measured flow rate
at the following load points: 60, 75, 90, 100, 110, and 120 percent
of the expected BEP flow rate. Use the linear relationship to
determine the pump power input at the nominal speed of rotation for
the load points of 75, 100, 110, and 120 percent of the BEP flow
rate.
E.1.2 Determine the motor part load losses at each load point
corresponding to 75, 100, or 110 percent of the BEP flow rate as
follows:
Li = Lfull x yi
Where:
Li = motor losses at load point i (hp),
Lfull = motor losses at full load (hp), as determined in
accordance with section III.E.1.2.1 of this appendix,
yi = loss factor at load point i as determined in
accordance with section III.E.1.2.2 of this appendix, and
i = load point corresponding to 75, 100, or 110 percent of the BEP
flow rate.
E.1.2.1 Determine the full load motor losses using the
appropriate motor efficiency value and horsepower as shown in the
following equation:
[GRAPHIC] [TIFF OMITTED] TR25JA16.041
Where:
Lfull = motor losses at full load (hp);
MotorHP = the motor horsepower (hp), as determined in accordance
with section II.E.1.2.1.1 of this appendix, and
[eta]motor,full = the default nominal full load motor
efficiency (%), as determined in accordance with section
III.E.1.2.1.2 of this appendix.
E.1.2.1.1 Determine the motor horsepower as follows:
For bare pumps other than ST pumps, determine the motor
horsepower by selecting the horsepower rating listed in Table 2 of
this appendix that is either equivalent to, or the next highest
horsepower greater than, the pump power input to the bare pump at
120 percent of the BEP flow rate of the tested pump.
For ST bare pumps, determine the motor horsepower by
selecting the horsepower rating listed in Table 2 of this appendix
that, is either equivalent to, or the next highest horsepower
greater than, the pump power input to the bare pump at 120 percent
of the BEP flow rate of the tested pump divided by a service factor
of 1.15.
For pumps sold with motors, pumps sold with motors and
continuous controls, or
[[Page 4153]]
pumps sold with motors and non-continuous controls, the motor
horsepower is the rated horsepower of the motor with which the pump
is being tested.
E.1.2.1.2 Determine the default nominal full load motor
efficiency as described in section III.E.1.2.1.2.1 of this appendix
for pumps other than ST pumps or III.E.1.2.1.2.2. of this appendix
for ST pumps.
E.1.2.1.2.1. For pumps other than ST pumps, the default nominal
full load motor efficiency is the minimum of the nominal full load
motor efficiency standards (open or enclosed) from the table
containing the current energy conservation standards for NEMA Design
B motors at Sec. 431.25, with the number of poles relevant to the
speed at which the pump is being tested (see section I.C.1 of this
appendix) and the motor horsepower determined in section
III.E.1.2.1.1 of this appendix.
E.1.2.1.2.2. For ST pumps, the default nominal full load motor
efficiency is the default nominal full load submersible motor
efficiency listed in Table 2 of this appendix, with the number of
poles relevant to the speed at which the pump is being tested (see
section I.C.1 of this appendix) and the motor horsepower determined
in section III.E.1.2.1.1 of this appendix;
E.1.2.2 Determine the loss factor at each load point
corresponding to 75, 100, or 110 percent of the BEP flow rate as
follows:
[GRAPHIC] [TIFF OMITTED] TR25JA16.042
Where:
yi = the part load loss factor at load point i,
Pi = pump power input to the bare pump at load point i
(hp), as determined in accordance with section III.E.1.1 of this
appendix,
MotorHP = as determined in accordance with section III.E.1.2.1 of
this appendix (hp),
[GRAPHIC] [TIFF OMITTED] TR25JA16.043
IV. Testing-Based Approach for Pumps Sold With Motors
A. Scope. This section IV applies only to pumps sold with
electric motors, including single-phase induction motors.
B. Measurement Equipment. The requirements regarding measurement
equipment presented in section I.B of this appendix apply to this
section IV, and in addition, the electrical measurement equipment
must:
(1) Be capable of measuring true RMS current, true RMS voltage,
and real power up to the 40th harmonic of fundamental supply source
frequency, and
(2) For all instruments used to measure a given parameter, have
a combined accuracy of 2.0 percent of the measured value
at the fundamental supply source frequency, where combined accuracy
is the root sum of squares of individual instrument accuracies.
C. Test Conditions. The requirements regarding test conditions
presented in section I.C of this appendix apply to this section IV.
The following conditions also apply to the mains power supplied to
the motor:
(1) Maintain the voltage within 5 percent of the
rated value of the motor,
(2) Maintain the frequency within 1 percent of the
rated value of the motor,
(3) Maintain the voltage unbalance of the power supply within
3 percent of the rated values of the motor, and
(4) Maintain total harmonic distortion below 12 percent
throughout the test.
D. Testing BEP for the Pump. Determine the BEP of the pump as
follows:
D.1 Adjust the flow by throttling the pump without changing the
speed of rotation of the pump to a minimum of seven flow points: 40,
60, 75, 90, 100, 110, and 120 percent of the expected BEP flow rate
of the pump at the nominal speed of rotation, as specified in HI
40.6-2014, except section 40.6.5.3, section A.7, and appendix B
(incorporated by reference, see Sec. 431.463).
D.2. Determine the BEP flow rate as the flow rate at the
operating point of maximum overall efficiency on the pump efficiency
curve, as determined in accordance with section 40.6.6.3 of HI 40.6-
2014 (incorporated by reference, see Sec. 431.463), where the
overall efficiency is the ratio of the pump power output divided by
the driver power input, as specified in Table 40.6.2.1 of HI 40.6-
2014, disregarding the calculations provided in section 40.6.6.2.
E. Calculating the Constant Load Pump Energy Rating. Determine
the PERCL of each tested pump using the following
equation:
[GRAPHIC] [TIFF OMITTED] TR25JA16.044
Where:
PERCL = the pump energy rating for a constant load (hp),
[omega]i = 0.3333,
Piin = measured driver power input to the
motor at load point i (hp) for the tested pump as determined in
accordance with section IV.E.1 of this appendix, and
i = load point corresponding to 75, 100, or 110 percent of the BEP
flow rate.
E.1 Determine the driver power input at 75, 100, and 110 percent
of the BEP flow rate by employing a least squares regression to
determine a linear relationship between the driver power input at
the nominal speed of rotation of the pump and the measured flow rate
at the following load points: 60, 75, 90, 100, 110, and 120 percent
of the expected BEP flow rate. Use the linear relationship to
determine the driver power input at the nominal speed of rotation
for the load points of 75, 100, and 110 percent of the BEP flow
rate.
V. Calculation-Based Approach for Pumps Sold With Motors
A. Scope. This section V can only be used in lieu of the test
method in section IV of this appendix to calculate the index for
pumps sold with motors listed in section V.A.1 or V.A.2 of this
appendix.
A.1 Pumps sold with motors subject to DOE's energy conservation
standards for polyphase electric motors at Sec. 431.25(g), and
A.2. Pumps sold with submersible motors.
A.3. Pumps sold with motors not listed in sections V.A.1 or
V.A.2 of this appendix cannot use this section V and must apply the
test method in section IV of this appendix.
B. Measurement Equipment. The requirements regarding measurement
equipment presented in section I.B of this appendix apply to this
section V, and in addition, when testing pumps using a calibrated
motor electrical measurement equipment must:
(1) Be capable of measuring true RMS current, true RMS voltage,
and real power up
[[Page 4154]]
to the 40th harmonic of fundamental supply source frequency, and
(2) For all instruments used to measure a given parameter, have
a combined accuracy of 2.0 percent of the measured value
at the fundamental supply source frequency, where combined accuracy
is the root sum of squares of individual instrument accuracies.
C. Test Conditions. The requirements regarding test conditions
presented in section I.C of this appendix apply to this section V.
When testing pumps using a calibrated motor the following conditions
also apply to the mains power supplied to the motor:
(1) Maintain the voltage within 5 percent of the
rated value of the motor,
(2) Maintain the frequency within 1 percent of the
rated value of the motor,
(3) Maintain the voltage unbalance of the power supply within
3 percent of the rated values of the motor, and
(4) Maintain total harmonic distortion below 12 percent
throughout the test.
D. Testing BEP for the Bare Pump. Determine the best efficiency
point (BEP) of the pump as follows:
D.1 Adjust the flow by throttling the pump without changing the
speed of rotation of the pump to a minimum of seven flow points: 40,
60, 75, 90, 100, 110, and 120 percent of the expected BEP flow rate
of the pump at the nominal speed of rotation, as specified in HI
40.6-2014, except section 40.6.5.3, section A.7, and appendix B
(incorporated by reference, see Sec. 431.463).
D.2. Determine the BEP flow rate as the flow rate at the
operating point of maximum pump efficiency on the pump efficiency
curve, as determined in accordance with section 40.6.6.3 of HI 40.6-
2014 (incorporated by reference, see Sec. 431.463), where pump
efficiency is the ratio of the pump power output divided by the pump
power input, as specified in Table 40.6.2.1 of HI 40.6-2014 and the
calculations provided in section 40.6.6.2 are to be disregarded.
E. Calculating the Constant Load Pump Energy Rating. Determine
the PERCL of each tested pump using the following
equation:
[GRAPHIC] [TIFF OMITTED] TR25JA16.045
Where:
PERCL = the pump energy rating for a constant load (hp),
[omega]i = 0.3333,
Piin,m = calculated driver power input to the
motor at load point i for the tested pump as determined in
accordance with section V.E.1 of this appendix (hp), and
i = load point corresponding to 75, 100, or 110 percent of the BEP
flow rate.
E.1 Determine the driver power input at each load point
corresponding to 75, 100, or 110 percent of the BEP flow rate as
follows:
[GRAPHIC] [TIFF OMITTED] TR25JA16.046
Where:
Pi\in,m\ = driver power input to the motor at load point
i (hp),
Pi = pump power input to the bare pump at load point i,
as determined in section V.E.1.1 of this appendix (hp),
Li = the part load motor losses at load point i as
determined in accordance with section V.E.1.2 of this appendix (hp),
and
i = load point corresponding to 75, 100, or 110 percent of the BEP
flow rate.
E.1.1 Determine the pump power input at 75, 100, 110, and 120
percent of the BEP flow rate by employing a least squares regression
to determine a linear relationship between the pump power input at
the nominal speed of rotation of the pump and the measured flow rate
at the following load points: 60, 75, 90, 100, 110, and 120 percent
of the expected BEP flow rate. Use the linear relationship to
determine the pump power input at the nominal speed of rotation for
the load points of 75, 100, 110, and 120 percent of the BEP flow
rate.
E.1.2 Determine the motor part load losses at each load point
corresponding to 75, 100, or 110 percent of the BEP flow rate as
follows:
Li = Lfull x Yi
Where:
Li = motor losses at load point i (hp),
Lfull = motor losses at full load as determined in
accordance with section V.E.1.2.1 of this appendix (hp),
yi = part load loss factor at load point i as determined
in accordance with section V.E.1.2.2 of this appendix, and
i = load point corresponding to 75, 100, or 110 percent of the BEP
flow rate.
E.1.2.1 Determine the full load motor losses using the
appropriate motor efficiency value and horsepower as shown in the
following equation:
[GRAPHIC] [TIFF OMITTED] TR25JA16.047
Where:
Lfull = motor losses at full load (hp),
MotorHP = the horsepower of the motor with which the pump model is
being tested (hp), and
[eta]motor,full = the represented nominal full load motor
efficiency (i.e., nameplate/DOE-certified value) or default nominal
full load submersible motor efficiency as determined in accordance
with section V.E.1.2.1.1 of this appendix (%).
E.1.2.1.1 For pumps sold with motors other than submersible
motors, determine the represented nominal full load motor efficiency
as described in section V.E.1.2.1.1.1 of this appendix. For pumps
sold with submersible motors determine the default nominal full load
submersible motor efficiency as described in section V.E.1.2.1.1.2
of this appendix.
E.1.2.1.1.1. For pumps sold with motors other than submersible
motors, the represented nominal full load motor efficiency is that
of the motor with which the given pump model is being tested, as
determined in accordance with the DOE test procedure for electric
motors at Sec. 431.16 and applicable representation procedures in
parts 429 and 430.
E.1.2.1.1.2. For pumps sold with submersible motors, the default
nominal full load submersible motor efficiency is that listed in
Table 2 of this appendix, with the number of poles relevant to the
speed at which the pump is being tested (see section I.C.1 of this
appendix) and the motor horsepower of the pump being tested.
E.1.2.2 Determine the loss factor at each load point
corresponding to 75, 100, or 110 percent of the BEP flow rate as
follows:
[GRAPHIC] [TIFF OMITTED] TR25JA16.048
Where:
yi = the part load loss factor at load point i,
Pi = the pump power input to the bare pump at load point
i as determined in accordance with section V.E.1.1 of this appendix
(hp),
MotorHP = the horsepower of the motor with which the pump model is
being tested (hp),
i = load point corresponding to 75, 100, or 110 percent of the BEP
flow rate, and
[[Page 4155]]
[GRAPHIC] [TIFF OMITTED] TR25JA16.049
in the equation in this section V.E.1.2.2. of this appendix to
calculate the part load loss factor at each load point
VI. Testing-Based Approach for Pumps Sold with Motors and Controls
A. Scope. This section VI applies only to pumps sold with
electric motors, including single-phase induction motors, and
continuous or non-continuous controls. For the purposes of this
section VI, all references to ``driver input power'' in this section
VI or HI 40.6-2014 (incorporated by reference, see Sec. 431.463)
refer to the input power to the continuous or non-continuous
controls.
B. Measurement Equipment. The requirements regarding measurement
equipment presented in section I.B of this appendix apply to this
section VI, and in addition electrical measurement equipment must:
(1) Be capable of measuring true RMS current, true RMS voltage,
and real power up to the 40th harmonic of fundamental supply source
frequency, and
(2) For all instruments used to measure a given parameter, have
a combined accuracy of 2.0 percent of the measured value
at the fundamental supply source frequency, where combined accuracy
is the root sum of squares of individual instrument accuracies.
C. Test Conditions. The requirements regarding test conditions
presented in section I.C of this appendix apply to this section VI.
The following conditions also apply to the mains power supplied to
the continuous or non-continuous control:
(1) Maintain the voltage within 5 percent of the
rated value of the motor,
(2) Maintain the frequency within 1 percent of the
rated value of the motor,
(3) Maintain the voltage unbalance of the power supply within
3 percent of the rated values of the motor, and
(4) Maintain total harmonic distortion below 12 percent
throughout the test.
D. Testing BEP for the Pump. Determine the BEP of the pump as
follows:
D.1. Adjust the flow by throttling the pump without changing the
speed of rotation of the pump to a minimum of seven flow points: 40,
60, 75, 90, 100, 110, and 120 percent of the expected BEP flow rate
of the pump at the nominal speed of rotation, as specified in HI
40.6-2014, except section 40.6.5.3, section A.7, and appendix B
(incorporated by reference, see Sec. 431.463).
D.2. Determine the BEP flow rate as the flow rate at the
operating point of maximum overall efficiency on the pump efficiency
curve, as determined in accordance with section 40.6.6.3 of HI 40.6-
2014 (incorporated by reference, see Sec. 431.463), where overall
efficiency is the ratio of the pump power output divided by the
driver power input, as specified in Table 40.6.2.1 of HI 40.6-2014
and the calculations provided in section 40.6.6.2 are to be
disregarded.
E. Calculating the Variable Load Pump Energy Rating. Determine
the PERVL of each tested pump using the following
equation:
[GRAPHIC] [TIFF OMITTED] TR25JA16.050
Where:
PERVL = the pump energy rating for a variable load (hp);
[omega]i = 0.25;
Piin,c = the normalized driver power input to
continuous or non-continuous controls at load point i for the tested
pump as determined in accordance with section VI.E.1 of this
appendix; and
i = load point corresponding 25, 50, 75, or 100 percent of the BEP
flow rate.
E.1. Determine the driver power input at 100 percent of the
measured BEP flow rate of the tested pump by employing a least
squares regression to determine a linear relationship between the
measured driver power input at the nominal speed of rotation of the
pump and the measured flow rate, using the following load points:
60, 75, 90, 100, 110, and 120 percent of the expected BEP flow rate.
Use the linear relationship to determine the driver power input at
the nominal speed of rotation for the load point of 100 percent of
the measured BEP flow rate of the tested pump.
E.2 Determine the driver power input at 25, 50, and 75 percent
of the BEP flow rate by measuring the driver power input at the load
points defined by:
(1) Those flow rates, and
(2) The associated head points calculated according to the
following reference system curve equation:
[GRAPHIC] [TIFF OMITTED] TR25JA16.051
Where:
Hi = pump total head at load point i (ft),
H100[percnt] = pump total head at 100 percent
of the BEP flow rate and nominal speed of rotation (ft),
Qi = flow rate at load point i (gpm),
Q100[percnt] = flow rate at 100 percent of the
BEP flow rate and nominal speed of rotation (gpm), and
i = load point corresponding to 25, 50, or 75 percent of the
measured BEP flow rate of the tested pump.
E.2.1. For pumps sold with motors and continuous controls, the
specific head and flow points must be achieved within 10 percent of
the calculated values and the measured driver power input must be
corrected to the exact intended head and flow conditions using the
following equation:
[[Page 4156]]
[GRAPHIC] [TIFF OMITTED] TR25JA16.052
Where:
Pi\in,c\ = the corrected driver power input to the
continuous or non-continuous controls at load point i (hp),
Hsp,i = the specified total system head at load point i
based on the reference system curve (ft),
HM,j = the measured total system head at load point j
(ft),
Qsp,i = the specified total system flow rate at load
point i based on the reference system curve (gpm),
QM,j = the measured total system flow rate at load point
j (gpm),
PM,j\in,c\ = the measured normalized driver power input
to the continuous or non-continuous controls at load point j (hp),
i = specified load point at 25, 50, 75, or 100 percent of BEP flow,
and
j = measured load point corresponding to specified load point i.
E.2.2. For pumps sold with motors and non-continuous controls,
the head associated with each of the specified flow points shall be
no lower than 10 percent below that defined by the reference system
curve equation in section VI.E.2 of this appendix. Only the measured
flow points must be achieved within 10 percent of the calculated
values. Correct for flow and head as described in section VI.E.2.1,
except do not correct measured head values that are higher than the
reference system curve at the same flow rate; only correct flow rate
and head values lower than the reference system curve at the same
flow rate. For head values higher than the system curve, use the
measured head points directly to calculate PEIVL.
VII. Calculation-Based Approach for Pumps Sold With Motors and Controls
A. Scope. This section VII can only be used in lieu of the test
method in section VI of this appendix to calculate the index for
pumps listed in section VII.A.1 or VII.A.2 of this appendix.
A.1. Pumps sold with motors regulated by DOE's energy
conservation standards for polyphase NEMA Design B electric motors
at Sec. 431.25(g) and continuous controls, and
A.2. Pumps sold with submersible motors and continuous controls.
A.3. Pumps sold with motors not listed in VII.A.1 or VII.A.2 of
this appendix and pumps sold without continuous controls, including
pumps sold with non-continuous controls, cannot use this section and
must apply the test method in section VI of this appendix.
B. Measurement Equipment. The requirements regarding measurement
equipment presented in section I.B of this appendix apply to this
section VII, and in addition, when testing pumps using a calibrated
motor electrical measurement equipment must:
(1) Be capable of measuring true RMS current, true RMS voltage,
and real power up to the 40th harmonic of fundamental supply source
frequency, and
(2) For all instruments used to measure a given parameter, have
a combined accuracy of 2.0 percent of the measured value
at the fundamental supply source frequency, where combined accuracy
is the root sum of squares of individual instrument accuracies.
C. Test Conditions. The requirements regarding test conditions
presented in section I.C of this appendix apply to this section VII.
When testing pumps using a calibrated motor the following conditions
also apply to the mains power supplied to the motor:
(1) Maintain the voltage within 5 percent of the
rated value of the motor,
(2) Maintain the frequency within 1 percent of the
rated value of the motor,
(3) Maintain the voltage unbalance of the power supply within
3 percent of the rated values of the motor, and
(4) Maintain total harmonic distortion below 12 percent
throughout the test.
D. Testing BEP for the Bare Pump. Determine the BEP of the pump
as follows:
D.1. Adjust the flow by throttling the pump without changing the
speed of rotation of the pump to a minimum of seven flow points: 40,
60, 75, 90, 100, 110, and 120 percent of the expected BEP flow rate
of the pump at the nominal speed of rotation, as specified in HI
40.6-2014, except section 40.6.5.3, section A.7, and appendix B
(incorporated by reference, see Sec. 431.463).
D.2. Determine the BEP flow rate as the flow rate at the
operating point of maximum pump efficiency on the pump efficiency
curve, as determined in accordance with section 40.6.6.3 of HI 40.6-
2014 (incorporated by reference, see Sec. 431.463), where pump
efficiency is the ratio of the pump power output divided by the pump
power input, as specified in Table 40.6.2.1 of HI 40.6-2014 and the
calculations provided in section 40.6.6.2 are to be disregarded.
E. Calculating the Variable Load Pump Energy Rating. Determine
the PERVL of each tested pump using the following
equation:
[GRAPHIC] [TIFF OMITTED] TR25JA16.053
Where:
PERVL = the pump energy rating for a variable load (hp);
[omega]i = 0.25;
Piin,c = the calculated driver power input to
the continuous or non-continuous controls at load point i for the
tested pump as determined in accordance with section VII.E.1 of this
appendix; and
i = load point corresponding to 25, 50, 75, or 100 percent of the
BEP flow rate.
E.1 Determine the driver power input at each load point
corresponding to 25, 50, 75, or 100 percent of the BEP flow rate as
follows:
[GRAPHIC] [TIFF OMITTED] TR25JA16.054
Where:
Pi\in,c\ = driver power input at to the continuous or
non-continuous controls at load point i (hp),
Pi = pump power input to the bare pump at load point i as
determined in accordance with section VII.E.1.1 of this appendix
(hp),
Li = the part load motor and control losses at load point
i as determined in accordance with section VII.E.1.2 of this
appendix (hp), and
i = load point corresponding to 25, 50, 75, or 100 percent of the
BEP flow rate.
E.1.1 Determine the pump power input at 100 percent of the
measured BEP flow rate of the tested pump by employing a least
squares regression to determine a linear relationship between the
measured pump power input at the nominal speed of rotation and the
measured flow rate at the following load points: 60, 75, 90, 100,
110, and 120 percent of the expected BEP flow rate. Use the linear
relationship to determine the pump power input at the nominal speed
of rotation for the load point of 100 percent of the BEP flow rate.
E.1.1.1 Determine the pump power input at 25, 50, and 75 percent
of the BEP flow rate based on the measured pump power input at 100
percent of the BEP flow rate and using with the following equation:
[GRAPHIC] [TIFF OMITTED] TR25JA16.055
Where:
Pi = pump power input at load point i (hp);
P100% = pump power input at 100 percent of the BEP flow
rate and nominal speed of rotation (hp);
Qi = flow rate at load point i (gpm);
Q100% = flow rate at 100 percent of the BEP flow rate and
nominal speed of rotation (gpm); and
i = load point corresponding to 25, 50, or 75 percent of the
measured BEP flow rate of the tested pump.
E.1.2 Calculate the motor and control part load losses at each
load point corresponding
[[Page 4157]]
to 25, 50, 75, and 100 percent of the BEP flow rate as follows:
Li = Lfull x zi
Where:
Li = motor and control losses at load point i (hp),
Lfull = motor losses at full load as determined in
accordance with section VII.E.1.2.1 of this appendix (hp),
zi = part load loss factor at load point i as determined
in accordance with section VII.E.1.2.2 of this appendix, and
i = load point corresponding to 25, 50, 75, or 100 percent of the
BEP flow rate.
E.1.2.1 Determine the full load motor losses using the
appropriate motor efficiency value and horsepower as shown in the
following equation:
[GRAPHIC] [TIFF OMITTED] TR25JA16.056
Where:
Lfull = motor losses at full load (hp),
MotorHP = the horsepower of the motor with which the pump model is
being tested (hp), and
[eta]motor,full = the represented nominal full load motor
efficiency (i.e., nameplate/DOE-certified value) or default nominal
full load submersible motor efficiency as determined in accordance
with section VII.E.1.2.1.1 of this appendix (%).
E.1.2.1.1 For pumps sold with motors other than submersible
motors, determine the represented nominal full load motor efficiency
as described in section VII.E.1.2.1.1.1 of this appendix. For pumps
sold with submersible motors, determine the default nominal full
load submersible motor efficiency as described in section
VII.E.1.2.1.1.2 of this appendix.
E.1.2.1.1.1 For pumps sold with motors other than submersible
motors, the represented nominal full load motor efficiency is that
of the motor with which the given pump model is being tested, as
determined in accordance with the DOE test procedure for electric
motors at Sec. 431.16 and applicable representation procedures in
parts 429 and 430.
E.1.2.1.1.2 For pumps sold with submersible motors, the default
nominal full load submersible motor efficiency is that listed in
Table 2 of this appendix, with the number of poles relevant to the
speed at which the pump is being tested (see section I.C.1 of this
appendix) and the motor horsepower of the pump being tested.
E.1.2.2 For load points corresponding to 25, 50, 75, and 100
percent of the BEP flow rate, determine the part load loss factor at
each load point as follows:
[GRAPHIC] [TIFF OMITTED] TR25JA16.057
Where:
zi = the motor and control part load loss factor at load
point i,
a,b,c = coefficients listed in Table 4 of this appendix based on the
horsepower of the motor with which the pump is being tested,
Pi = the pump power input to the bare pump at load point
i, as determined in accordance with section VII.E.1.1 of this
appendix (hp),
MotorHP = the horsepower of the motor with which the pump is being
tested (hp),
[GRAPHIC] [TIFF OMITTED] TR25JA16.058
Table 2--Default Nominal Full Load Submersible Motor Efficiency by Motor
Horsepower and Pole
------------------------------------------------------------------------
Default nominal full load
submersible motor efficiency
Motor horsepower (hp) -------------------------------
2 poles 4 poles
------------------------------------------------------------------------
1....................................... 55 68
1.5..................................... 66 70
2....................................... 68 70
3....................................... 70 75.5
5....................................... 74 75.5
7.5..................................... 68 74
10...................................... 70 74
15...................................... 72 75.5
20...................................... 72 77
25...................................... 74 78.5
30...................................... 77 80
40...................................... 78.5 81.5
50...................................... 80 82.5
[[Page 4158]]
60...................................... 81.5 84
75...................................... 81.5 85.5
100..................................... 81.5 84
125..................................... 84 84
150..................................... 84 85.5
200..................................... 85.5 86.5
250..................................... 86.5 86.5
------------------------------------------------------------------------
Table 3--Nominal Full Load Motor Efficiency Values
------------------------------------------------------------------------
Nominal full load motor efficiency*
-------------------------------------------------------------------------
50.5
52.5
55.0
57.5
59.5
62.0
64.0
66.0
68.0
70.0
72.0
74.0
75.5
77.0
78.5
80.0
81.5
82.5
84.0
85.5
86.5
87.5
88.5
89.5
90.2
91.0
91.7
92.4
93.0
93.6
94.1
94.5
95.0
95.4
95.8
96.2
96.5
96.8
97.1
97.4
97.6
97.8
98.0
98.2
98.4
98.5
98.6
98.7
98.8
98.9
99.0
------------------------------------------------------------------------
* Note: Each consecutive incremental value of nominal efficiency
represents one band.
Table 4--Motor and Control Part Load Loss Factor Equation Coefficients for Section VII.E.1.2.2 of This Appendix
A
----------------------------------------------------------------------------------------------------------------
Coefficients for Motor and Control Part Load Loss
Factor (zi)
Motor horsepower (hp) -----------------------------------------------------
a b c
----------------------------------------------------------------------------------------------------------------
<=5....................................................... - 0.4658 1.4965 0.5303
>5 and <=20............................................... - 1.3198 2.9551 0.1052
>20 and <=50.............................................. - 1.5122 3.0777 0.1847
>50....................................................... - 0.8914 2.8846 0.2625
----------------------------------------------------------------------------------------------------------------
[FR Doc. 2016-00039 Filed 1-22-16; 8:45 am]
BILLING CODE 6450-01-P