SIST EN 17038-2:2019
(Main)Pumps - Methods of qualification and verification of the Energy Efficiency Index for rotodynamic pumps units - Part 2: Testing and calculation of energy Efficiency Index (EEI) of single pump units
Pumps - Methods of qualification and verification of the Energy Efficiency Index for rotodynamic pumps units - Part 2: Testing and calculation of energy Efficiency Index (EEI) of single pump units
This European standard specifies methods and procedures for testing, calculating and determining the Energy Efficiency Index (EEI) of rotodynamic glanded single pump units for pumping clean water, including where integrated in other products.
The pump types and sizes covered by this standard are described in the normative Annex A.
Pumpen - Methoden zur Qualifikation und Verifikation des Energieeffizienzindexes für Kreiselpumpen - Teil 2: Prüfung und Berechnung des Energieeffizienzindexes (EEI) einzelner Pumpenaggregate
Dieses Dokument legt Methoden und Verfahren für die Prüfung, Berechnung und Bestimmung des Energieeffizienzindex (EEI) von Trockenläufer-Kreiselpumpenaggregaten zum Pumpen von sauberem Wasser fest, auch wenn sie in andere Produkte integriert sind.
Die von diesem Dokument behandelten Pumpentypen und -größen werden im normativen Anhang A aufgeführt.
Pompes - Méthodes de qualification et de vérification de l'indice de rendement énergétique des groupes motopompes rotodynamiques - Partie 2 : Essais et calcul de l'indice de rendement énergétique (EEI) des groupes motopompes simples
La présente Norme européenne spécifie des méthodes et procédures d'essai, de calcul et de détermination de l'indice de rendement énergétique (EEI) des groupes motopompes à eau rotodynamiques dotés d'un dispositif d'étanchéité utilisés pour le pompage d'eau propre, y compris dans des versions intégrées à d'autres produits.
Les types et tailles de pompes couverts par la présente norme sont décrits dans l'Annexe A normative.
Črpalke - Metode za kvalifikacijo in verifikacijo indeksa energijske učinkovitosti centrifugalnih črpalk - 2. del: Preskušanje in računanje indeksa energijske učinkovitosti (IEE) enodelnih črpalk
Ta evropski standard določa metode in postopke za preskušanje, računanje in določanje indeksa energijske učinkovitosti (EEI) centrifugalnih tesnilnih enodelnih črpalk za črpanje čiste vode, vključno z vgrajenimi črpalkami v ostalih proizvodih.
Vrste in velikosti črpalk, zajetih v tem standardu, so opisane v normativnem dodatku A.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 17038-2:2019
01-julij-2019
Črpalke - Metode za kvalifikacijo in verifikacijo indeksa energijske učinkovitosti
centrifugalnih črpalk - 2. del: Preskušanje in računanje indeksa energijske
učinkovitosti (IEE) enodelnih črpalk
Pumps - Methods of qualification and verification of the Energy Efficiency Index for
rotodynamic pumps units - Part 2: Testing and calculation of energy Efficiency Index
(EEI) of single pump units
Pumpen - Methoden zur Qualifikation und Verifikation des Energieeffizienzindexes für
Kreiselpumpen - Teil 2: Prüfung und Berechnung des Energieeffizienzindexes (EEI)
einzelner Pumpenaggregate
Pompes - Méthodes de qualification et de vérification de l'indice de rendement
énergétique des groupes motopompes rotodynamiques - Partie 2 : Essais et calcul de
l'indice de rendement énergétique (EEI) des groupes motopompes simples
Ta slovenski standard je istoveten z: EN 17038-2:2019
ICS:
23.080 Črpalke Pumps
27.015 Energijska učinkovitost. Energy efficiency. Energy
Ohranjanje energije na conservation in general
splošno
SIST EN 17038-2:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 17038-2:2019
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SIST EN 17038-2:2019
EN 17038-2
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2019
EUROPÄISCHE NORM
ICS 23.080
English Version
Pumps - Methods of qualification and verification of the
Energy Efficiency Index for rotodynamic pump units - Part
2: Testing and calculation of Energy Efficiency Index (EEI)
of single pump units
Pompes - Méthodes de qualification et de vérification Pumpen - Methoden zur Qualifikation und Verifikation
de l'indice de rendement énergétique des groupes des Energieeffizienzindexes für Kreiselpumpen - Teil 2:
motopompes rotodynamiques - Partie 2 : Essais et Prüfung und Berechnung des Energieeffizienzindexes
calcul de l'indice de rendement énergétique (EEI) des (EEI) einzelner Pumpenaggregate
groupes motopompes simples
This European Standard was approved by CEN on 15 July 2018.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17038-2:2019 E
worldwide for CEN national Members.
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SIST EN 17038-2:2019
EN 17038-2:2019 (E)
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Reference flow-time profiles and reference pressure control curves . 8
4.1 General . 8
4.2 Reference flow-time profiles . 9
4.3 Reference pressure control curves . 10
5 Determination of average electric power input P by test . 10
1,avg
5.1 General . 10
5.1.1 Test requirements . 10
5.1.2 Test conditions . 10
5.1.3 Measuring instrumentation . 11
5.2 Calculation of load points . 12
5.2.1 General . 12
5.2.2 Determination of Q and H . 12
100 % 100 %
5.3 Calculation of P . 14
1,avg
5.3.1 General . 14
5.3.2 Pump units evaluated with the reference flow-time profile for constant flow
operation . 14
5.3.3 Pump units evaluated with the reference flow-time profile for variable flow
operation . 14
5.3.4 Procedures for testing and evaluation of pump units with special pump types . 15
6 Determination of the Energy Efficiency Index of pump units by the means of a semi-
analytical model . 16
6.1 General . 16
6.2 The semi analytical model of the pump . 17
6.3 Pump units in fixed speed operation . 19
6.3.1 General . 19
6.3.2 The model of the electric motor. 20
6.3.3 Interaction of pump and motor . 21
6.3.4 Determination of Q from Q . 22
100 % BEP
6.3.5 Determination of the P -value . 23
1,avg,c
6.4 Pump units with a Power Drive System (PDS). 24
6.4.1 General . 24
6.4.2 The model of the Power Drive System (PDS) . 26
6.4.3 Interaction between pump and PDS . 29
6.4.4 Determination of Q and H from Q and H . 30
100 % 100 % BEP BEP
6.4.5 Determination of P and P for pump units with PDS . 31
1,avg,v 1,avg,c
7 Determination of reference electric power input P . 32
1,ref
8 Calculation of Energy Efficiency index (EEI) . 35
2
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SIST EN 17038-2:2019
EN 17038-2:2019 (E)
Annex A (normative) Scope . 36
Annex B (informative) Determination of additional supporting points for semi-analytical
model based on empirical correlations . 39
B.1 General . 39
B.2 Additional supporting points for end-suction pumps (pump types ESOB, ESCC and
ESCCi) . 41
B.2.1 Additional supporting points at Q/Q = 0,25 . 41
BEP
B.2.2 Additional supporting points at Q/Q = 0,1. 41
BEP
B.3 Additional supporting points for vertical multistage pump (MS-V) . 42
B.3.1 Additional supporting points at Q/Q = 0,25 . 42
BEP
B.3.2 Additional supporting points at Q/Q = 0,1. 42
BEP
B.4 Maximum model uncertainties . 42
Annex C (normative) Synthesis of the PDS supporting points from separate data for motor
and CDM . 46
C.1 General . 46
C.2 Determination of the losses P at the 3-supporting points needed for the PDS
L,CDM
model . 49
C.3 Determination of the losses P at the 3 supporting points needed for the PDS
L,PDS
model . 50
Annex D (informative) Uncertainties and tolerances of EEI-values . 52
D.1 General remarks . 52
D.2 The measurement uncertainty of the EEI-value determined by test . 52
D.3 The uncertainty of the EEI-value determined by the application of models . 55
D.3.1 General . 55
D.3.2 Operation mode: Fixed speed . 55
D.3.3 Operation mode: Variable speed . 56
D.4 The total tolerance of the mean EEI-value . 58
D.4.1 Determination of the mean EEI-value by testing only one pump unit . 58
D.4.2 Determination of the mean EEI-value by testing a sample of M pump units of the
same type series . 60
D.4.3 Determination of the mean EEI-value by application of the semi-analytical model . 60
Annex E (informative) Mathematical solution of polynomial formulae of 3rd degree . 63
Annex F (normative) CDM model fall back values for Semi Analytical Model . 65
Bibliography . 66
3
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SIST EN 17038-2:2019
EN 17038-2:2019 (E)
European foreword
This document (EN 17038-2:2019) has been prepared by Technical Committee CEN/TC 197 “Pumps”,
the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by November 2019, and conflicting national standards
shall be withdrawn at the latest by November 2019.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
4
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SIST EN 17038-2:2019
EN 17038-2:2019 (E)
Introduction
This part of the European Standard is the second part of a series of standards describing a methodology
to evaluate energy efficiency performance of single pump units, comprising the pump, the motor with
or without frequency converter, based on a non-dimensional numerical value called Energy Efficiency
Index (EEI). An EEI allows the comparison of different pump sizes and types with one common
indicator. Physical influences such as pump size, specific speed, pump unit part-load operation, motor-
efficiency characteristic and frequency converter influence are implemented into this metric.
Specific requirements for testing and a calculation method for an EEI, the so called semi-analytical
model of a complete single pump unit, specific flow-time profiles and reference control curves are given
in this part of the standard.
EEI is an index to rate pump units according to their energy efficiency but does not replace the need to
do a life-time cost analysis regarding energy consumption over the life time of the pump unit.
5
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SIST EN 17038-2:2019
EN 17038-2:2019 (E)
1 Scope
This document specifies methods and procedures for testing, calculating and determining the Energy
Efficiency Index (EEI) of rotodynamic glanded single pump units for pumping clean water, including
where integrated in other products.
The pump types and sizes covered by this document are described in the normative Annex A.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 16480, Pumps — Minimum required efficiency of rotodynamic water pumps
EN 17038-1:2019, Pumps — Methods of qualification and verification of the Energy Efficiency Index for
Rotodynamic pumps units — Part 1: General requirements and procedures for testing and calculation of
energy efficiency index (EEI)
EN 60034-1, Rotating electrical machines — Part 1: Rating and performance (IEC 60034-1)
EN 60034-2-1, Rotating electrical machines — Part 2-1: Standard methods for determining losses and
efficiency from tests (excluding machines for traction vehicles) (IEC 60034-2-1)
EN 60034-2-2, Rotating electrical machines — Part 2-2: Specific methods for determining separate losses
of large machines from tests — Supplement to IEC 60034-2-1 (IEC 60034-2-2)
EN 60034-30-1, Rotating electrical machines — Part 30-1: Efficiency classes of line operated AC motors
(IE code) (IEC 60034-30-1)
EN 60038, CENELEC standard voltages (IEC 60038)
EN 61800-9-2, Adjustable speed electrical power drive systems — Part 9-2: Ecodesign for power drive
systems, motor starters, power electronics & their driven applications — Energy efficiency indicators for
power drive systems and motor starters (IEC 61800-9-2)
EN ISO 9906:2012, Rotodynamic pumps — Hydraulic performance acceptance tests — Grades 1, 2 and 3
(ISO 9906:2012)
EN ISO 17769-1, Liquid pumps and installation — General terms, definitions, quantities, letter symbols
and units — Part 1: Liquid pumps (ISO 17769-1)
IEC/TS 60034-2-3, Rotating electrical machines — Part 2-3: Specific test methods for determining losses
and efficiency of converter-fed AC induction motors
3 Terms and definitions
For the purpose of this document, the terms and definitions given in EN ISO 17769-1 and the terms,
definitions, symbols and subscripts given in EN 17038-1, together with the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
6
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SIST EN 17038-2:2019
EN 17038-2:2019 (E)
3.1
unit efficiency
hydraulic power output divided by electric power input also called “wire to water efficiency”
P
hyd
η =
unit
P
1
3.2
constant flow operation
slight variations of the flow rate around the nominal value
Note 1 to entry: Caused by secondary influences from the process as, for example, due to the (moderately)
varying level of liquid in reservoirs, etc. The variation of flow rate occurs typically within the range which is
covered by the definition and determination of the Minimum Efficiency Index (MEI) of the pump, see EN 16480,
and which is from 0,75 · Q to 1,1 · Q .
100 % 100 %
3.3
variable flow
widely varying flow rate
Note 1 to entry: Typically, at considerable fractions of the total operating time, the actual demand for pump flow
rate Q and pump head H is much lower than the values at the operating point of maximum flow rate which is
demanded by the application.
3.4
hydraulic power
conventional expression of the arithmetic product of the flow Q and the head H and a constant (g is the
2
gravitational constant of 9,81 m/s )
3.5
maximum hydraulic power
absolute maximum P of hydraulic power of a pump unit set of parameters which cause the pump
hyd,max
unit to generate the curve of maximum hydraulic power
Note 1 to entry: The pump unit needs to be capable and designed to run in maximum operation continuously.
3.6
pump unit best efficiency point, (Q / H )
BEP,unit BEP,unit
Flow-Head-Point where the pump unit runs at its best unit efficiency point and at maximum operation
3.7
reference flow rate, Q
100%
3
flow per time unit [m /h] at the Best Efficiency Point (BEP) of the unit
3.8
reference head, H
100%
total differential head [m] at the Best Efficiency Point (BEP) of the unit
3.9
flow-time profile
pattern of percentiles of time where the pump unit runs at a given flow rate
7
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SIST EN 17038-2:2019
EN 17038-2:2019 (E)
3.10
Complete Drive Module
CDM
electronic power converter connected between the electric supply and a motor as well as extensions
such as protection devices, transformers and auxiliaries (according to EN 61800-2)
3.11
Power Drive System
PDS
combination of CDM and motor
3.12
trimmed impeller
impeller of a pump where the initial full diameter D reduced to a new diameter D
full trim
3.13
average impeller diameter
mathematical average of varying outer vane diameter for a single stage pump
3.14
average multistage impeller diameter
mathematical average of all (averaged) impeller diameters of all stages
4 Reference flow-time profiles and reference pressure control curves
4.1 General
When putting single pump units into service an appropriate EEI value shall be made available. The EEI
shall be for variable flow (EEI ) and/or constant flow (EEI ) according to the demand of the application
V C
in which the pump unit is put into service or for which the pump unit is specified when placed on the
market. For the determination of the EEI or EEI the respective reference flow-time profiles and the
V C
reference pressure control curves given in Table 1 have to be applied.
8
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SIST EN 17038-2:2019
EN 17038-2:2019 (E)
Table 1 — Reference flow-time profiles and reference pressure control curves for single pump
units
Mode
Reference
Reference
pressure Applicable Q/H test EEI
flow-time
# Demand of Type of
control points applicable
profile
application Pump
curve
Unit
M1 constant fixed speed constant flow Q/H curve of On Q/H curve of the EEI
C
flow (Table 2) the pump unit pump unit
EEI
M2 variable fixed speed variable flow Formula (1) On Q/H curve of the
V
flow (Table 3) pump unit
M3 constant variable constant flow Q/H curve of On Q/H curve of the EEI
C
flow speed (Table 2) the pump unit pump unit (measured
at fixed speed)
M4 variable variable variable flow Formula (1) Q/H points on curve EEI
V
flow speed (Table 3) defined by
Formula (1)
M5 constant variable variable flow Formula (1) Q/H points on curve EEI
V
flow, speed (Table 3) defined by
varying Formula (1)
head
In case of a bare shaft pump alone to be placed on the market the EEI shall be determined with a
reference motor (refer to Class “IE3” in EN 60034-30-1) in mode M1 depending on the nominal speed of
-1
the bare shaft pump (either 2-pole type for the pump nominal speed n = 2 900 min or is of the 4-
N,PU
-1
pole type for the pump nominal speed n = 1 450 min ). The reference motor shall have a nominal
N,PU
power output which exactly equals the shaft power of the pump at its nominal operating conditions.
4.2 Reference flow-time profiles
The reference flow time profile for constant flow operation is shown in Table 2.
Table 2 — Reference flow-time profile for constant flow operation
Flow Q in % of Q 75 100 110
100 %
Time Δt in % of total 25 50 25
operating time
The reference flow time profile for variable flow operation is shown in Table 3.
Table 3 — Reference flow-time profile for variable flow operation
25 50 75 100
Flow Q in % of Q
100 %
44 35 15 6
Time Δt in % of total
operating time
9
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SIST EN 17038-2:2019
EN 17038-2:2019 (E)
4.3 Reference pressure control curves
In the case of the variable flow demand, the reference control curve is defined by Formula (1):
H Q
ii
0,,5+ 0 5⋅ (1)
HQ
100%%100
The values H /H at the corresponding values of Q /Q of the reference flow-time profile are
i 100 % i 100 %
given according to Formula (1).
The reference pressure control curve defined by Formula (1) with the corresponding hydraulic load
points given in Table 2 and 3 in numerical form additionally are plotted graphically in Clause 5,
Figure 2.
In the case of the constant flow mode, the reference control curve is the Q/H curve of the actual pump
unit applied to define Q , H (see also Clause 5, Figure 1).
100 % 100 %
In the case of the constant flow and varying head demand (mode M5), the reference control curve is
defined by Formula (1).
5 Determination of average electric power input P by test
1,avg
5.1 General
5.1.1 Test requirements
This clause specifies performance tests and evaluations for pump units which are carried out
— either by a company which places the pump units on the market and/or puts them into service,
— or by an independent institution in the frame of the verification procedure described in
EN 17038-1:2019, Clause 6.
Such tests shall provide the necessary information on the actual performance values of test pump units
needed for the calculation of the EEI-value according to its definition given in EN 17038-1:2019,
Clause 4.
All provisions for the test concerning the pump shall be in accordance with EN ISO 9906, class 2. The
exception for input power of 10 kW and below (as allowed for the application of EN ISO 9906 on
acceptance tests) shall not be valid.
All provisions for the test concerning an electric motor if it is part of the pump unit and is fed directly
from an electric grid shall be in accordance with EN 60034-2-1.
All provisions for the test concerning a Power Drive System (PDS) if part of the pump unit shall be in
accordance with EN 61800-9-2.
5.1.2 Test conditions
Tests shall be carried out with clean cold water. The performance of a pump varies substantially with
the nature of the liquid being pumped. It is not possible to give general rules whereby performance
results measured with clean cold water can be converted to predict performance with water having
other properties (temperature, content of solids or gas) or other liquids.
The duration of the test shall be sufficient to obtain repeatable results; especially run-in and warming-
up effects of the electric and electronic components of the unit shall be considered.
NOTE 1 Run-in effects may take up to one day operating time.
10
=
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SIST EN 17038-2:2019
EN 17038-2:2019 (E)
All measurements shall be made under steady-state conditions (see EN ISO 9906, EN 60034-2-1,
EN 60034-2-2 and IEC TS 60034-2-3 and EN 61800-9-2).
NOTE 2 EN 61800-9-2 allows warming up the PDS for measuring the nominal point. All other points can be
measured quickly after measuring maximum load without waiting for the steady-state.
The tests should be conducted under conditions where cavitation does not affect the performance of the
pump.
NOTE 3 If cavitation exists to a remarkable extent in the test pump during the test, not only the pump head but
also the pump efficiency and the power input can deteriorate which leads to an underestimation of the energy
efficiency of the pump unit.
For Case 1 in 5.2.1 (motor fed by an electric supply with constant frequency) the electric power supply
of the test installation shall fulfil the requirements as specified in EN 60034-1. This requires that
— the voltage shall be in accordance with 7.2 of EN 60038 and EN 60034-1,
— the frequency shall be within ± 0,3 % of the rated frequency during measurements.
For Case 2 in 5.2.1 (PDS, i.e. motor combined with and fed by a CDM) the following requirements shall
be fulfilled in accordance with EN 61800-9-2:
— When testing a PDS under the load of the pump, slow fluctuations in the measured quantities may
be unavoidable. Therefore, for each load point several measurements over a period of time (at least
several slip cycles, typically 1 min to 3 min) shall be sampled and the average of these values shall
be used for the evaluation.
— Pump units equipped with a PDS shall be measured with a screened cable between CDM and motor
of a maximum length of 10 m.
— The measurements shall be done when the PDS is thermally stable (the temperature gradient shall
be maximal 2 K per hour).
5.1.3 Measuring instrumentation
For the test procedures described in 5.1.1 measuring instrumentation is needed for th
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Pumps - Methods of qualification and verification of the Energy Efficiency Index for
rotodynamic pumps units - Part 2: Testing and calculation of energy Efficiency Index
(EEI) of single pump units
Pumpen - Methoden zur Qualifikation und Verifikation des Energieeffizienzindexes für
Kreiselpumpen - Teil 2: Prüfung und Berechnung des Energieeffizienzindexes (EEI)
einzelner Pumpenaggregate
Pompes - Méthodes de qualification et de vérification de l'indice de rendement
énergétique des groupes motopompes rotodynamiques - Partie 2 : Essais et calcul de
l'indice de rendement énergétique (EEI) des groupes motopompes simples
Ta slovenski standard je istoveten z: prEN 17038-2
ICS:
23.080 ýUSDONH Pumps
27.015 (QHUJLMVNDXþLQNRYLWRVW Energy efficiency. Energy
2KUDQMDQMHHQHUJLMHQD conservation in general
VSORãQR
oSIST prEN 17038-2:2016 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 17038-2:2016
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oSIST prEN 17038-2:2016
DRAFT
EUROPEAN STANDARD
prEN 17038-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2016
ICS 23.080
English Version
Pumps - Methods of qualification and verification of the
Energy Efficiency Index for rotodynamic pumps units -
Part 2: Testing and calculation of energy Efficiency Index
(EEI) of single pump units
Pompes - Méthodes de qualification et de vérification Pumpen - Methoden zur Qualifikation und Verifikation
de l'indice de rendement énergétique des groupes des Energieeffizienzindexes für Kreiselpumpen - Teil 2:
motopompes rotodynamiques - Partie 2 : Essais et Prüfung und Berechnung des Energieeffizienzindexes
calcul de l'indice de rendement énergétique (EEI) des (EEI) einzelner Pumpenaggregate
groupes motopompes simples
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 197.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17038-2:2016 E
worldwide for CEN national Members.
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Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Reference flow-time profiles and reference pressure control curves . 8
4.1 General . 8
4.2 Reference flow-time profiles . 9
4.3 Reference pressure control curves . 10
5 Determination of average electric power input P by test . 10
1,avg
5.1 General . 10
5.1.1 Test requirements . 10
5.1.2 Test conditions . 10
5.1.3 Measuring instrumentation . 11
5.2 Calculation of load points . 12
5.2.1 General . 12
5.2.2 Determination of Q100 % and H100 % . 12
5.2.3 Determination of part load and over load points and reference control curve . 13
5.3 Calculation of P . 14
1,avg
5.3.1 General . 14
5.3.2 Pump units evaluated with the reference flow-time profile for constant flow
operation . 14
5.3.3 Pump units evaluated with the reference flow-time profile for variable flow
operation . 14
5.3.4 Procedures for testing and evaluation of pump units with special pump types . 16
6 Determination of the Energy Efficiency Index of pump units by the means of a semi-
analytical model . 16
6.1 General . 16
6.2 The semi analytical model of the pump . 17
6.3 Pump units in fixed speed operation . 19
6.3.1 General . 19
6.3.2 The model of the electric motor. 20
6.3.3 Interaction of pump and motor . 21
6.3.4 Determination of Q from Q . 22
100 % BEP
6.3.5 Determination of the P -value . 23
1,avg,c
6.4 Pump units with a Power Drive System (PDS). 23
6.4.1 General . 23
6.4.2 The model of the Power Drive System (PDS) . 25
6.4.3 Interaction between pump and PDS . 28
6.4.4 Determination of Q and H from Q and H . 28
100 % 100 % BEP BEP
6.4.5 Determination of P and P for pump units with PDS . 29
1,avg,v 1,avg,c
7 Determination of reference electric power input P . 30
1,ref
8 Calculation of Energy Efficiency index (EEI) . 32
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Annex A (normative) Scope . 33
Annex B (informative) Determination of additional supporting points for semi-analytical
model based on empirical correlations . 35
B.1 Additional supporting points for end-suction pumps (pump types ESOB, ESCC and
ESCCi) . 37
B.1.1 Additional supporting points at Q/Q = 0,25 . 37
BEP
B.1.2 Additional supporting points at Q/Q = 0,1 . 37
BEP
B.2 Additional supporting points for vertical multistage pump (MS-V) . 38
B.2.1 Additional supporting points at Q/Q = 0,25 . 38
BEP
B.2.2 Additional supporting points at Q/Q = 0,1 . 38
BEP
B.3 Maximum model uncertainties . 38
Annex C (normative) Synthesis of the PDS supporting points from separate data for motor
and CDM . 42
C.1 General . 42
C.2 Determination of the losses P at the 3 supporting points needed for the PDS
L,CDM
model. 44
at the 3 supporting points needed for the PDS
C.3 Determination of the losses PL,PDS
model. 46
Annex D (informative) Uncertainties and tolerances of EEI-values . 47
D.1 General remarks . 47
D.2 The measurement uncertainty of the EEI-value determined by test . 47
D.3 The uncertainty of the EEI-value determined by the application of models . 50
D.3.1 General . 50
D.3.2 Operation mode: Fixed speed . 51
D.3.3 Operation mode: Variable speed . 52
D.4 The total tolerance of the mean EEI-value . 53
D.4.1 Determination of the mean EEI-value by testing only one pump unit. 53
D.4.2 Determination of the mean EEI-value by testing a sample of M pump units of the
same type series . 55
D.4.3 Determination of the mean EEI-value by application of the semi-analytical model . 55
rd
Annex E (informative) Mathematical solution of polynomial formulae of 3 degree . 58
Annex F (normative) CDM model fall back values for Semi Analytical Model . 60
Bibliography . 61
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European foreword
This document (prEN 17038-2:2016) has been prepared by Technical Committee CEN/TC 197 “Pumps”,
the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
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Introduction
This part of the European standard is the second part of a series of standards describing a methodology
to evaluate energy efficiency performance of single pump units, comprising the pump, the motor with
or without frequency converter, based on a non-dimensional numerical value called Energy Efficiency
Index (EEI). An EEI allows the comparison of different pump sizes and types with one common
indicator. Physical influences such as pump size, specific speed, pump unit part-load operation, motor-
efficiency characteristic and frequency converter influence are implemented into this metric.
Specific requirements for testing and a calculation method for an EEI, the so called semi-analytical
model of a complete single pump unit, specific flow-time profiles and reference control curves are given
in this part of the standard.
EEI is an index to rate pump units according to their energy efficiency but does not replace the need to
do a life-time cost analysis regarding energy consumption over the life time of the pump unit.
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1 Scope
This European standard specifies methods and procedures for testing, calculating and determining the
Energy Efficiency Index (EEI) of rotodynamic glanded single pump units for pumping clean water,
including where integrated in other products.
The pump types and sizes covered by this standard are described in the normative Annex A.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN ISO 17769-1, Liquid pumps and installation — General terms, definitions, quantities, letter symbols
and units — Part 1: Liquid pumps (ISO 17769-1)
EN ISO 9906:2012, Rotodynamic pumps — Hydraulic performance acceptance tests — Grades 1, 2 and 3
(ISO 9906:2012)
EN 16480, Pumps — Minimum required efficiency of rotodynamic water pumps
FprEN 17038-1, Pumps — Methods of qualification and verification of the energy efficiency Index
forRotodynamic pumps units — Part 1: General requirements and procedures for testing and calculation
of energy efficiency index (EEI)
EN 60034-1, Rotating electrical machines — Part 1: Rating and performance
EN 60034-30-1, Rotating electrical machines — Part 30-1: Efficiency classes of line operated AC motors
(IE-code) (IEC 60034-30-1)
EN 60034-2-1, Rotating electrical machines — Part 2-1: Standard methods for determining losses and
efficiency from tests (excluding machines for traction vehicles) (IEC 60034-2-1)
EN 60034-2-2, Rotating electrical machines — Part 2-2: Specific methods for determining separate losses
of large machines from tests — Supplement to IEC 60034-2-1
IEC TS 60034-2-3, Rotating electrical machines — Part 2-3: Specific test methods for determining losses
and efficiency of converter-fed AC induction motors
EN 60038, CENELEC standard voltages
FprEN 61800-9-1, Adjustable speed electrical power drive systems — Part 9-1: Energy efficiency of power
drive systems, motor starters, power electronics and their driven applications — General requirements for
setting energy efficiency standards for power driven equipment using the Extended Product Approach
(EPA) and semi analytic model (SAM)
FprEN 61800-9-2, Adjustable speed electrical power drive systems — Part 9-2: Ecodesign for power drive
systems, motor starters, power electronics & their driven applications — Energy efficiency indicators for
power drive systems and motor starters
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3 Terms and definitions
For the purpose of this document the terms and definitions given in EN ISO 17769-1 and the following
apply.
3.1
unit efficiency
hydraulic power output divided by electric power input also called “wire to water efficiency”
η = PP/
unit hyd 1
3.2
constant flow operation
slight variations of the flow rate around the nominal value
NOTE Caused by secondary influences from the process as, for example, due to the (moderately) varying level
of liquid in reservoirs etc. The variation of flow rate occurs typically within the range which is covered by the
definition and determination of the Minimum Efficiency Index (MEI) of the pump, see EN 16480, and which is
from 0,75 · Q to 1,1 · Q .
100 % 100 %
3.3
variable flow
widely varying flow rate
Note 1 to entry: Typically, at considerable fractions of the total operating time, the actual demand for pump
flow rate Q and pump head H is much lower than the values at the operating point of maximum flow rate which is
demanded by the application.
3.4
Hydraulic Power
conventional expression of the arithmetic product of the flow Q and the head H and a constant
Note 1 to entry:
Q
Pgρ⋅⋅ ⋅ H
hyd W ( )
3600
where
P is the hydraulic power [W];
hyd
3
Q is the flow [m /h];
H is the total Head [m];
3
ρ is the density of the test water 1 000 kg/m ;
W
2
g is the gravitational constant of 9,81 m/s .
3.5
maximum hydraulic power
of hydraulic power of a pump unit
absolute maximum Phyd,max
7
=
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3.6
set of parameters which cause the pump unit to generate the curve of maximum hydraulic power
Note 1 to entry: The pump unit needs to be capable and designed to run in maximum operation continuously.
3.7
pump unit best efficiency point, (Q / H )
BEP,unit BEP,unit
Flow-Head-Point where the pump unit runs at its best unit efficiency point and at maximum operation
3.8
reference flow rate, Q
100%
3
flow per time unit [m /s] at the Best Efficiency Point (BEP) of the unit
3.9
reference head, H
100%
total differential head [m] at the Best Efficiency Point (BEP) of the unit
3.10
flow-time profile
pattern of percentiles of time where the pump unit runs at a given flow rate
3.11
Complete Drive Module (CDM)
electronic power converter connected between the electric supply and a motor as well as extensions
such as protection devices, transformers and auxiliaries (according to EN 61800-2)
3.12
Power Drive System (PDS)
combination of CDM and motor
4 Reference flow-time profiles and reference pressure control curves
4.1 General
When putting single pump units into service an appropriate EEI value shall be made available. The EEI
shall be for variable flow (EEI ) and/or constant flow (EEI ) according to the demand of the application
V C
in which the pump unit is put into service or for which the pump unit is specified when placed on the
market. For the determination of the EEI or EEI the respective reference flow-time profiles and the
V C
reference pressure control curves given in Table 1 have to be applied.
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Table 1 — Reference load flow profiles and reference pressure control curves for single pump
units
Reference
Mode
Reference
pressure Applicable Q/H EEI
flow-time
control test points applicable
# Demand of Type of
profile
curve
application Pump Unit
M1 constant fixed speed constant flow Q/H curve of On Q/H curve of EEI
C
flow (Table 2) the pump unit the pump unit
M2 variable fixed speed variable flow Formula (1) On Q/H curve of EEI
V
flow (Table 3) the pump unit
M3 constant variable constant flow Q/H curve of On Q/H curve of EEI
C
flow speed (Table 2) the pump unit the pump unit
(measured at
fixed speed)
M4 variable variable variable flow Formula (1) Q/H points on EEI
V
flow speed (Table 3) curve defined by
Formula (1)
M5 constant variable variable flow Formula (1) Q/H points on EEI
V
flow, speed (Table 3) curve defined by
varying Formula (1)
head
In case of a bare shaft pump alone to be placed on the market the EEI shall be determined with a
reference motor (refer to Class “IE3” in EN 60034-30-1) in mode M1 depending on the nominal speed of
= 2 900 1/min or is of the 4-
the bare shaft pump (either 2-pole type for the pump nominal speed nN,PU
pole type for the pump nominal speed n = 1 450 1/min). The reference motor shall have a nominal
N,PU
power output which exactly equals the shaft power of the pump at its nominal operating conditions.
4.2 Reference flow-time profiles
The reference flow time profile for constant flow operation is shown in Table 2.
Table 2— Reference flow-time profile for constant flow operation
Flow Q in % of Q 75 100 110
100%
Time Δt in % of total 25 50 25
operating time
The reference flow time profile for variable flow operation is shown in Table 3.
Table 3 — Reference flow-time profile for variable flow operation
25 50 75 100
Flow Q in % of Q
100%
44 35 15 6
Time Δt in % of total
operating time
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4.3 Reference pressure control curves
In the case of the variable flow demand, the reference control curve is defined by Formula (1).
H / H = 100⋅ 0,5+⋅0,5 QQ/ [%] (1)
( )
i 100% 100%
The values Hi/H100% at the corresponding values of Qi/Q100% of the reference flow-time profile are given
according to Formula (1).
The reference pressure control curve defined by Formula (1) with the corresponding hydraulic load
points given in Table 2 and 3 in numerical form additionally are plotted graphically in Clause 5,
Figure 2.
In the case of the constant flow mode, the reference control curve is the Q/H curve of the actual pump
unit applied to define Q , H (see also Clause 5, Figure 1).
100% 100%
In the case of the constant flow and varying head demand (mode M5), the reference control curve is
defined by Formula (1).
5 Determination of average electric power input P by test
1,avg
5.1 General
5.1.1 Test requirements
This clause specifies performance tests and evaluations for pump units which are carried out
— either by a company which places the pump units on the market and/or puts them into service,
— or by an independent institution in the frame of the verification procedure described in FprEN
17038-1:2016, Clause 6.
Such tests shall provide the necessary information on the actual performance values of test pump units
needed for the calculation of the EEI-value according to its definition given in FprEN 17038-1:2016,
Clause 4.
All provisions for the test concerning the pump shall be in accordance with EN ISO 9906, class 2. The
exception for input power of 10 kW and below (as allowed for the application of EN ISO 9906 on
acceptance tests) shall not be valid.
All provisions for the test concerning an electric motor if it is part of the pump unit and is fed directly
from an electric grid shall be in accordance with EN 60034-2-1.
All provisions for the test concerning a Power Drive System if is part of the pump unit shall be in
accordance with FprEN 61800-9-2.
5.1.2 Test conditions
Tests shall be carried out with clean cold water. The performance of a pump varies substantially with
the nature of the liquid being pumped. It is not possible to give general rules whereby performance
results measured with clean cold water can be converted to predict performance with water having
other properties (temperature, content of solids or gas) or other liquids.
The duration of the test shall be sufficient to obtain repeatable results; especially run-in and warming-
up effects of the electric and electronic components of the unit shall be considered.
NOTE 1 Run-in effects may take up to one day operating time.
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All measurements shall be made under steady state conditions (see EN ISO 9906, EN 60034-2-1,
EN 60034-2-2 and IEC TS 60034-2-3 and FprEN 61800-9-2).
NOTE 2 prEN 61800–9-2 allows warming up the PDS for measuring the nominal point. All other points can be
measured quickly after measuring maximum load without waiting for the steady-state.
The tests should be conducted under conditions where cavitation does not affect the performance of the
pump.
NOTE 3 If cavitation exists to a remarkable extent in the test pump during the test, not only the pump head but
also the pump efficiency and the power input can deteriorate which leads to an underestimation of the energy
efficiency of the pump unit.
For Case 1 in 5.2.1 (motor fed by an electric supply with constant frequency) the electric power supply
of the test installation shall fulfil the requirements as specified in EN 60034-1. This requires that
— the voltage shall be in accordance with 7.2 of EN 60038 and EN 60034-1,
— the frequency shall be within ± 0,3 % of the rated frequency during measurements.
For Case 2 in 5.2.1 (PDS, i.e. motor combined with and fed by a CDM) the following requirements have
to be fulfilled in accordance to FprEN 61800-9-2:
— When testing a PDS under the load of the pump, slow fluctuations in the measured quantities may
be unavoidable. Therefore for each load point several measurements over a period of time (at least
several slip cycles, typically 1 min to 3 min) shall be sampled and the average of these values shall
be used for the evaluation.
— Pump units equipped with a PDS shall be measured with a screened cable between CDM and motor
of a maximum length of 10 m.
— The measurements shall be done when the PDS is thermally stable (the temperature gradient shall
be maximal 2 K per hour).
5.1.3 Measuring instrumentation
For the test procedures described in 5.1.1 measuring instrumentation is needed for the determination
of:
— the flow rate Q;
— the pump head H;
— the electric power input P .
1
Since instrument accuracy is generally expressed as a percentage of full scale, the range of the
instruments chosen shall be as small as practical.
For analogue instruments the observed values should be in the upper third of the instrument range.
The measuring equipment needed to determine the flow rate Q and the pump head H shall be selected
in accordance with EN ISO 9906. Detailed information is given in EN ISO 9906:2012, A.1.
For the determination of the electric power input P in case 1 in 5.2.1 (motor directly fed by the electric
1
grid) the electric input power P is determined based on input voltages U and input currents. All
1
...
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