SIST EN 16480:2016
(Main)Pumps - Minimum required efficiency of rotodynamic water pumps
Pumps - Minimum required efficiency of rotodynamic water pumps
This European Standard covers glanded water pumps for pumping clean water, including where integrated in other products. Pumps designed and produced as low duty pumps for pressures up to 16 bar for end suction pumps and up to 25 bar for multistage pumps, temperatures between -10 and +120°C, for clean water, in all kinds of material.
Pumpen - Geforderte Mindesteffizienz bei Kreiselpumpen für Wasser
1.1 Pumpentechnik
Dieses Dokument behandelt Wasserpumpen mit Stopfbuchsen (Trockenläuferpumpen) für das Pumpen von klarem Wasser, einschließlich solcher Pumpen, die in anderen Produkten verbaut sind. Pumpen, die als Niedrigleistungspumpen für Drücke bis 16 bar bei Pumpen mit axialem Eintritt und bis 25 bar bei mehrstufigen Pumpen, für Temperaturen zwischen 10 °C und 120 °C und für klares Wasser ausgelegt sind und aus sämtlichen Werkstoffen hergestellt werden. Siehe Anhang A für weitere Informationen.
1.2 Pumpentypen
- Pumpen mit axialem Eintritt und Inline-Pumpen für einen Auslegungsdruck bis 16 bar (einschließlich EN 733 oder gleichwertig).
- Mehrstufige Vertikalpumpen mit einem Auslegungsdruck bis 25 bar.
- Mehrstufige Tauchpumpen, die für den Einsatz in Bohrlöchern innerhalb eines Betriebstemperaturbereichs von 0 °C bis 90 °C ausgelegt sind.
- Bei Sonderkonstruktionen der in diesem Absatz festgelegten Pumpentypen ist das unter 5.5.4 beschriebene Prüfverfahren in Betracht zu ziehen.
ANMERKUNG Die in den Anwendungsbereich dieser Norm fallenden Pumpentypen und -größen sind im Allgemeinen in Massenproduktion hergestellte Pumpen. Größere Pumpen am oberen Ende des Anwendungsbereichs werden möglicherweise in kleinerer Anzahl hergestellt.
1.3 Anwendung dieser Europäischen Norm
Bild 1 zeigt, wie die vorliegende Europäische Norm anzuwenden ist.
Pompes - Rendement minimum requis des pompes à eau rotodynamiques
1.1 Technologie des pompes
Le présent document traite des pompes à eau dotées d’un dispositif d’étanchéité employées pour pomper de l’eau propre, y compris les pompes intégrées dans d’autres produits. Pompes conçues et fabriquées comme des pompes pour service léger pour des pressions inférieures ou égales à 16 bar pour les pompes à aspiration en bout et inférieures ou égales à 25 bar pour les pompes multi-étagées, températures comprises entre - 10 °C et + 120 °C, pour eau propre, en tous types de matériaux. Voir l'Annexe A pour de plus amples informations.
1.2 Types de pompe
- Pompes à aspiration en bout et pompes en ligne pour une pression de calcul de base inférieure ou égale à 16 bar (y compris l’EN 733 ou une norme équivalente).
- Pompes verticales multi-étagées ayant une pression de calcul de base inférieure ou égale à 25 bar.
- Pompes submersibles multi-étagées conçues pour fonctionner dans des trous de forage à des températures de fonctionnement comprises entre 0 °C et 90 °C.
- Pour une conception spéciale des types de pompes spécifiés dans le présent paragraphe, le mode opératoire d’essai décrit au paragraphe 5.5.4 doit être envisagé.
NOTE Les types et dimensionnements de pompe relevant du domaine d’application correspondent généralement à des pompes fabriquées en série. Les pompes de grand dimensionnement situées à la limite supérieure du domaine d’application peuvent être fabriquées en série plus limitée.
1.3 Application de la présente Norme européenne
La Figure 1 illustre la manière dont la présente Norme européenne doit être appliquée.
Črpalke - Minimalna zahtevana učinkovitost centrifugalnih vodnih črpalk
Ta evropski standard vključuje tesnilne vodne črpalke za črpanje čiste vode, vključno z vgrajenimi črpalkami v ostalih proizvodih. Črpalke, zasnovane in izdelane kot črpalke z nizko porabo za tlake do 16 barov pri sesalnih vodnih črpalkah in do 25 barov pri večstopenjskih črpalkah ter za temperature med –10 in 120 °C za čisto vodo pri vseh vrstah materialov.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 16480:2016
01-julij-2016
ýUSDONH0LQLPDOQD]DKWHYDQDXþLQNRYLWRVWFHQWULIXJDOQLKYRGQLKþUSDON
Pumps - Minimum required efficiency of rotodynamic water pumps
Pumpen - Geforderte Mindesteffizienz bei Kreiselpumpen für Wasser
Pompes - Rendement minimum requis des pompes à eau rotodynamiques
Ta slovenski standard je istoveten z: EN 16480:2016
ICS:
23.080 ýUSDONH Pumps
SIST EN 16480:2016 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN 16480:2016
---------------------- Page: 2 ----------------------
SIST EN 16480:2016
EN 16480
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2016
EUROPÄISCHE NORM
ICS 23.080
English Version
Pumps - Minimum required efficiency of rotodynamic
water pumps
Pompes - Rendement minimum requis des pompes à Pumpen - Geforderte Mindesteffizienz bei
eau rotodynamiques Kreiselpumpen für Wasser
This European Standard was approved by CEN on 4 March 2016.
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, 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: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 16480:2016 E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 16480:2016
EN 16480:2016 (E)
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 7
2 Normative references . 8
3 Terms and definitions . 8
3.1 General . 8
3.2 List of quantities with definitions . 8
3.3 Lists of basic letters and subscripts . 10
3.4 General definitions . 12
4 Minimum Required Efficiencies and Minimum Efficiency Index . 14
4.1 The concept of “house of efficiency” . 14
4.2 Mathematical representation of minimum required efficiency . 15
4.3 Minimum efficiency at part load and overload . 16
4.4 Minimum Efficiency Index . 17
5 Determination of the Efficiency of a Test Pump . 20
5.1 General . 20
5.2 Test Procedures . 20
5.3 Test conditions . 21
5.4 Measuring uncertainties . 22
5.5 Evaluation of test data . 24
6 Proving the Minimum Efficiency Index of a pump size . 29
6.1 General remarks . 29
6.2 Determination of the Minimum Efficiency Index of a pump size . 30
7 Verification of the Minimum Efficiency Index for a pump size . 31
7.1 General remarks . 31
7.2 Procedure and decision . 31
Annex A (normative) Pump types in scope . 35
Annex B (informative) General remarks on the efficiency of rotodynamic pumps . 37
Annex C (informative) Mean Values of a Size Relevant for its Minimum Efficiency Index . 39
Annex D (informative) Methods recommended for manufacturers to determine the mean
values of hydraulic quantities of a size relevant for MEI . 44
D.1 General remarks . 44
D.2 Determination of the mean efficiency of a pump size from a test on one single test
pump . 44
D.3 Determination of the mean efficiency of a pump size from a sample of M test pumps. 46
Annex E (informative) Numerical example. 49
Annex F (informative) Application of mathematical statistics on tests . 54
F.1 Purposes of applying statistics in the frame of qualification and verification . 54
F.2 Confidence interval . 55
2
---------------------- Page: 4 ----------------------
SIST EN 16480:2016
EN 16480:2016 (E)
F.3 Law of error propagation . 57
F.4 Numerical example . 57
Annex G (informative) Measurement uncertainties . 64
G.1 General remarks . 64
G.2 Determination of the overall measurement uncertainty of efficiency . 66
Annex H (informative) Explanations concerning the methodology of the verification
procedure and the probability of the results . 68
Annex I (informative) Reporting of Test Results . 71
I.1 Test Report Requirements . 71
I.2 Pump test sheet . 71
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2009/125/EC, establishing a framework for the
setting of ecodesign requirements of energy related products and implemented by
the European Commission Regulation (EU) No. 547/2012 . 73
Bibliography . 74
3
---------------------- Page: 5 ----------------------
SIST EN 16480:2016
EN 16480:2016 (E)
European foreword
This document (EN 16480:2016) has been prepared by Technical Committee CEN/TC 197 “Pumps -
Minimum required efficiency of rotodynamic water 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 2016, and conflicting national standards
shall be withdrawn at the latest by November 2016.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive 2009/125/EC.
For relationship with EU Directive 2009/125/EC, see informative Annex ZA, which is an integral part of
this document.
According to the CEN/CENELEC Internal Regulations, the national standards organizations 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, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
4
---------------------- Page: 6 ----------------------
SIST EN 16480:2016
EN 16480:2016 (E)
Introduction
Purpose and content of the standard
The water pumps within the scope of this European Standard are typically produced and sold by pump
manufacturers as series of large to very large numbers. The performance characteristics of pumps of
one size produced by a manufacturer show some scatter caused by manufacturing tolerances, but are
described by mean values and curves which represent that size.
The total consumption of electric energy by water pumps installed in applications within the scope of
this European Standard depends on the total number of installed pumps of each size and on its mean
efficiency. The quality of a size in respect to its mean efficiency is quantitatively described by the
Minimum Efficiency Index (MEI) which is defined and used in this standard. To achieve a certain value
of the Minimum Efficiency Index (MEI), a corresponding minimum value of the mean efficiency of a size
is required.
This European Standard defines – for each pump type and size within the scope of the standard - the
minimum required value of efficiency depending on the value of the Minimum Efficiency Index (MEI).
Also, this standard prescribes how the value of the Minimum Efficiency Index (MEI) of a pump size
indicated by the manufacturer can be verified by an independent institution (e.g. in the frame of market
surveillance). For the manufacturer of the pump size it is generally left free how to prove the indicated
value of the Minimum Efficiency Index (MEI) of a size. Nevertheless, this standard describes also a
method to prove by the manufacturer that the mean values of efficiency meet the requirements for
indicating a certain value of the Minimum Efficiency Index (MEI).
Normally, the qualification of a pump size for a certain MEI value done by the manufacturer will be
based on tests and evaluations made on a sample of pumps of this size. It is essential that tests and
evaluations carried out for the purpose of qualifying the corresponding size fulfil certain requirements:
— From the tests on the sample pumps, it becomes possible to predict for the corresponding size the
confidence intervals within which the true mean values of efficiencies which are relevant for the
qualification are enclosed with a sufficiently high probability. Only in that way, the qualification of
the size in respect to a required and/or indicated value of Minimum Efficiency Index (MEI) will
make sure that the aspired effect of energy saving will be reached.
— If a pump size has been qualified according to the criteria described in this European Standard,
every test on one or more test pump(s) of the same size (with a full impeller diameter) which is
carried out in the frame of a verification procedure shall result with a very high probability in a
confirmation of the qualification.
Caused by technical alignment procedures of the single pump components, e.g. bearings or shaft seals,
the performance of the pump is gained after a certain running-in time.
Ways to prove and to verify the Minimum Efficiency Index (MEI) of a pump size
This European Standard describes different ways how manufacturers can achieve the qualification of a
pump size for a certain value of the Minimum Efficiency Index (MEI) and how this qualification can be
verified by an independent institution.
For the manufacturer, it is generally left free to choose and apply appropriate methods to prove that the
mean efficiency values of a size are at least equal to or higher than particular threshold values of
efficiency. These particular threshold values of efficiency are related to the value of the Minimum
Efficiency Index (MEI) to be indicated for the size. The way to determine these values of efficiency is
described in this standard. If the way chosen by the manufacturer to prove the MEI value of a size
deviates from the way mentioned in the next paragraph, the manufacturer has to document all tests,
evaluations and/or calculations which are carried out and the methods which are applied to prove the
justification of the indicated MEI value.
5
---------------------- Page: 7 ----------------------
SIST EN 16480:2016
EN 16480:2016 (E)
If the manufacturer decides to determine the mean performance values of the size by one of the
methods described in Annex D of this standard, he has to carry out tests according to the requirements
given in Annex C of this standard and evaluations as described in Annex C of this standard and to prove
– as described in Clause 7 of this standard – that the criteria for the achievement of a certain value of
the Minimum Efficiency Index (MEI) of the size are fulfilled. The test conditions, the results of test
evaluation and the fulfilment of the criteria are documented and stored. The time period to keep
documentation available for the authorities to prove conformity is fixed by the legal text.
The independent institution carries out tests on pumps of the size in question according to the
requirements given in 5.2 to 5.4 of this standard as well as evaluations as described in 5.5 of this
standard and applies the methodology and procedure described in Clause 4 of this standard.
For an independent institution, two ways are possible and specified by this standard to verify the value
of Minimum Efficiency Index (MEI) indicated by the manufacturer:
a) If the documentation of the qualification is presented by the manufacturer to the independent
institution on request, the procedure of verification executed by the independent institution is
based on the documentation of tests and evaluations done and documented by the manufacturer. In
this case, the documentation will be checked by the independent institution in respect to being in
accordance with requirements and criteria given in this standard.
b) If no documentation is presented by the manufacturer on request or if the documentation
presented by the manufacturer on request is not accepted as proof of the indicated value of MEI,
the independent institution carries out tests on pumps of the size in question according to the
requirements given in Annex C of this standard as well as evaluations as described in 5.5 of this
standard and applies the methodology and procedure described in Clause 4 of this standard.
Relevance of Sections of this standard for manufacturers or independent institutions
Clause 4 describes nominal values of minimum required efficiency for a certain value of the Minimum
Efficiency Index (MEI) and is generally relevant when applying this standard.
Clause 5 specifies test procedures, test conditions and evaluations and has to be applied
— by a manufacturer in the case that he decides to determine mean values of a size by tests on sample
pumps of this size (e.g. by methods described in Annex D),
— by an independent institution in the case that the Minimum Efficiency Index (MEI) of a pump size
shall be verified by the procedure described in Clause 7.
Clause 6 describes the procedure to be applied by a manufacturer in order to determine particular
threshold values of efficiency for a certain value of the Minimum Efficiency Index (MEI) of a size and to
prove the justification of this MEI value by the fulfilment of criteria for the mean efficiency values.
Clause 7 describes the methodology and procedure to be applied by an independent institution in the
case that the Minimum Efficiency Index (MEI) of a size indicated by the manufacturer shall be verified
by third party tests on pumps of this size.
Annex C is concerned with mean values of a pump size which are relevant for manufacturers to prove
that a pump size achieves a certain value of the Minimum Efficiency Index (MEI).
6
---------------------- Page: 8 ----------------------
SIST EN 16480:2016
EN 16480:2016 (E)
1 Scope
This European Standard specifies performance requirements (methods and procedures for testing and
calculating) for determining the Minimum Efficiency Index (MEI) of rotodynamic glanded water pumps
for pumping clean water, including where integrated in other products.
The pump types and sizes covered by this standard are described in the Annex A. These pumps are
designed and produced as duty pumps for pressures up to 16 bar for end suction pumps and up to
25 bar for multistage pumps, temperatures between -10 °C and +120 °C and 4” or 6” size for
submersible multistage pumps at operating temperatures within a range of 0 °C and 90 °C.
In addition, this standard specifies how the value of the Minimum Efficiency Index (MEI) of a pump size
indicated by the manufacturer can be checked by market surveillance.
Even if it is left free to the manufacturer of a pump size how to prove the rated value of the Minimum
Efficiency Index (MEI), nevertheless this standard specifies a method to prove that this rated value
meets the requirements within the confidence intervals with a sufficiently high probability.
Figure 1 — Scheme of application of this standard
7
---------------------- Page: 9 ----------------------
SIST EN 16480:2016
EN 16480:2016 (E)
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 9906:2012, Rotodynamic pumps — Hydraulic performance acceptance tests — Grades 1, 2 and 3
(ISO 9906:2012)
3 Terms and definitions
3.1 General
For the purposes of this European Standard, the quantities, definitions, symbols and units given in
EN ISO 9906 and in 3.2 apply. 3.2 gives specific definitions of terms - in deviation of EN ISO 9906 - used
in this European Standard, together with any associated symbols which have been allocated and is
based on ISO 80000.
Table 1 gives an alphabetical list of symbols used and Table 2 gives a list of subscripts. As far as
possible, the quantities, definitions and symbols used in this standard comply with those used in
EN ISO 9906. Quantities, definitions and symbols used in EN ISO 9906, but not needed in this standard
are not contained in 3.2 and Tables 1 and 2, while these tables contain some quantities, definitions and
symbols which are not used in EN ISO 9906.
In this European Standard, all formulae are given in coherent SI-units.
3.2 List of quantities with definitions
For the purposes of this document, the following terms and definitions apply. Most of the terms and
definitions come from EN ISO 9906, except for the definition of MEI.
3.2.1
Reynolds number
dimension less number that gives a measure of the ratio of inertial forces to viscous forces and
consequently quantifies the relative importance of these two types of forces for given flow conditions.
In this standard, it is defined by the relation:
Du⋅
imp
Re=
ν
where u is the peripheral velocity at the outer impeller diameter D
imp
3.2.2
(volume) rate of flow
external rate of flow of the pump, i.e. the rate of flow discharged into the pipe from the outlet branch of
the pump
Note 1 to entry: Losses or abstractions inherent to the pump, i.e.:
— discharge necessary for hydraulic balancing of axial thrust;
— cooling of bearings of the pump itself;
— water seal to the packing.
8
---------------------- Page: 10 ----------------------
SIST EN 16480:2016
EN 16480:2016 (E)
Note 2 to entry: Leakage from the fittings, internal leakage, etc. is not to be reckoned in the rate of flow. On the
contrary, all derived flows for other purposes, such as cooling of the motor bearings; cooling of a gear box
(bearings, oil cooler), etc. are to be reckoned in the rate of flow.
Note 3 to entry: Whether and how these flows shall be taken into account depends on the location of their
derivation and of the section of flow-measurement respectively.
3.2.3
driver power input
power absorbed by the pump driver
3.2.4
pump efficiency
P
Hydraulic output
hyd
η
Pumppower input
P
2
3.2.5
driver efficiency
P
Pumppower input
2
η
dr
Driver power input
P
1
3.2.6
overall efficiency
P
hyd Pumppower output
η
tot
Driver power input
P
1
3.2.7
specific speed
dimensional number characterizing the impeller type (radial, semi-axial, axial) of rotodynamic pumps
Q
BEP
nn⋅
sN
0.75
H
BEP
Note 1 to entry: For multistage pumps, H is the head per stage which results from dividing the total pump
BEP
head at the point of best efficiency by the number of stages.
Note 2 to entry: The specific speed of an individual pump or the mean specific speed of a pump size is a
(dimensional) value which characterizes the impeller shape (radial, semi-axial, axial) of the pump or the size. The
numerical value of the specific speed is defined by an equation given in 3.2.7 by using special units for the
quantities contained in this equation. As described in Clause 4, the specific speed is one of the parameters which
the nominal values of minimum required efficiency depend on.
3.2.8
minimum efficiency index
MEI
value which determines the minimum required efficiency for the qualification criteria and, thereby, is a
measure of the quality of a pump size in respect to efficiency
Note 1 to entry: Dimensionless scale unit for hydraulic pump efficiency at BEP, PL and OL.
9
=
==
==
==
---------------------- Page: 11 ----------------------
SIST EN 16480:2016
EN 16480:2016 (E)
Note 2 to entry: The MEI is the result of a statistical analysis of the performances of a large number of
commercial pump sizes, and corresponds to the various “quartiles” of the statistical distribution.
For example, MEI = 0,40 corresponds to the efficiency performance level that 40 % of the pumps on the market do
not meet.
3.3 Lists of basic letters and subscripts
Table 1 — Alphabetical list of basic letters used as symbols
Symbol Quantity Unit
2
A Area m
C Constant pure number
D Diameter m
e Measurement uncertainty, relative value pure number
-1
f Frequency s , Hz
2
g Acceleration due to gravity m/s
H Pump total head m
k Number of instrument readings or sample pumps pure number
m Mass kg
M Number of pumps of a sample pure number
-1 -1
n Speed of rotation s , min
N Number of instrument readings pure number
-1
n Specific speed min
s
p Pressure Pa
p Probability pure number
P Power W
3
Q (Volume) rate of flow m /s
s Standard deviation of a sample according to special quantity
t Tolerance factor, relative value pure number
t Time s
t Student´s factor pure number
T Torque Nm
u Peripheral velocity m/s
U Mean velocity m/s
U Voltage V
v Local velocity m/s
3
V Volume m
x General quantity according to special quantity
10
---------------------- Page: 12 ----------------------
SIST EN 16480:2016
EN 16480:2016 (E)
Symbol Quantity Unit
y General quantity according to special quantity
z Height above reference plane m
z Number of produced pumps pure number
η Efficiency pure number
θ Temperature °C
2
ν Kinematic viscosity m /s
3
ρ Density kg/m
ω Angular velocity rad/s
σ Standard deviation of normal distribution according to special quantity
For a list of concise designations (short term description) of pump types in scope, see Annex B.
Table 2 — List of letters and figures used as subscripts
Subscript Meaning
1 electrical
2 mechanical
abs absolute
amb ambient
annual per year
curve on fitting curve
BEP at best efficiency point
dr driver
D datum
exp experimentally determined
G guaranteed
H pump total head
I numbering index
J numbering index
imp impeller
man manufacturing
max maximum permissible
mean mean value of pump series
min,requ minimum required
N nominal
OL overload
Pd pre-defined
11
---------------------- Page: 13 ----------------------
SIST EN 16480:2016
EN 16480:2016 (E)
Subscript Meaning
P power
PL part load
Q (volume) flow rate
R random
S specific, systematic
sync synchronous
tot total, overall
true true value
T torque
T translated
v vapour
x of quantity x
y % for probability of y %
η efficiency
hyd hydraulic
3.4 General definitions
3.4.1
qualification
procedure where the manufacturer of the pump size proves, by appropriate methods, the fulfilment of
the efficiency criteria defined in this standard
Note 1 to entry: Generally, the qualification criteria refer to the mean values of the size which are valid for the
full impeller diameter and which will be determined by tests and evaluations on pumps of the respective size.
These mean efficiency values and their confidence intervals are compared to nominal values of minimum required
efficiency. Also, these values depend on parameters (see Clause 4) the values of which partly result from the tests
and are determined with some uncertainty or tolerance. Therefore, so-called particular threshold values of
efficiency are determined and used in the frame of the qualification procedure for comparison with the mean
values.
3.4.2
verification
procedure where an independent institution checks the result of the qualification procedure, in the
frame of market surveillance
Note 1 to entry: In this case, the tests and the evaluation of the test data are carried out according to Clause 5 of
this European Standard. The approval decision is taken according to the procedure described in Clause 7 of this
European Standard.
3.4.3
independent institution/market surveillance
organization mandated by the market surveillance for verification of MEI values indicated by
manufacturers
12
---------------------- Page: 14 ----------------------
SIST EN 16480:2016
EN 16480:2016 (E)
Note 1 to entry: These organizations are generally called independent institutions whatever the special type of
the institution (non-governmental organization (NGO), neutral institute, market surveillance authorities or
similar) may be.
Note 2 to entry: Neutral institutions or similar organizations can also be mandated by a manufacturer for the
qua
...
SLOVENSKI STANDARD
oSIST prEN 16480:2014
01-september-2014
ýUSDONH0LQLPDOQD]DKWHYDQDXþLQNRYLWRVWFHQWULIXJDOQLKYRGQLKþUSDON
Pumps - Minimum required efficiency of rotodynamic water pumps
Pumpen - Geforderte Mindesteffizienz bei Kreiselpumpen für Wasser
Pompes - Rendement minimum requis des pompes à eau rotodynamiques
Ta slovenski standard je istoveten z: prEN 16480
ICS:
23.080 ýUSDONH Pumps
oSIST prEN 16480:2014 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN 16480:2014
---------------------- Page: 2 ----------------------
oSIST prEN 16480:2014
EUROPEAN STANDARD
DRAFT
prEN 16480
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2014
ICS 23.080
English Version
Pumps - Minimum required efficiency of rotodynamic water
pumps
Pompes - Rendement minimum requis des pompes à eau Pumpen - Geforderte Mindesteffizienz bei Kreiselpumpen
rotodynamiques für Wasser
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
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 16480:2014 E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
oSIST prEN 16480:2014
prEN 16480:2014 (E)
Contents
Page
Introduction .5
1 Scope .7
1.1 Pump technology .7
1.2 Pump types .7
1.3 Application of this European Standard .7
2 Normative references .8
3 Terms and definitions .9
3.1 General .9
3.2 List of quantities with definitions .9
3.3 Lists of basic letters and subscripts . 10
3.5 General definitions . 12
4 Minimum Required Efficiencies and Minimum Efficiency Index . 16
4.1 The concept of “house of efficiency” . 16
4.2 Mathematical representation of minimum required efficiency . 18
4.3 Minimum efficiency at part load and overload . 19
4.4 Minimum Efficiency Index . 19
5 Determination of the Efficiency of a Test Pump . 22
5.1 General . 22
5.2 Test Procedures . 22
5.3 Test conditions . 23
5.4 Measuring uncertainties . 24
5.4.1 Relevance . 24
5.4.2 Maximum permissible random uncertainty . 24
5.4.3 Maximum permissible measurement device (systematic) uncertainty . 25
5.5 Evaluation of test data . 26
5.5.1 Conversion of the test results to the nominal speed of rotation or to the nominal electric
frequency . 26
5.5.2 Performance curves . 27
5.5.3 Determination of the values relevant for the qualification or verification . 29
5.5.4 Procedures for testing and/or evaluation of special pump types . 29
6 Proving the Minimum Efficiency Index of a pump size. 30
6.1 General remarks. 30
6.2 Determination of the Minimum Efficiency Index of a pump size . 31
7 Verification of the Minimum Efficiency Index for a pump size . 32
7.1 General remarks. 32
7.2 Procedure and decision . 32
Annex A (normative) Pump types in scope . 37
Annex B (informative) General remarks on the efficiency of rotodynamic pumps . 39
Annex C (informative) Mean Values of a Size Relevant for its Minimum Efficiency Index . 41
Annex D (informative) Methods recommended for manufacturers to determine the mean values
of hydraulic quantities of a size relevant for MEI . 46
D.1 General remarks. 46
D.2 Determination of the mean efficiency of a pump size from a test on one single test pump . 46
D.3 Determination of the mean efficiency of a pump size from a sample of M test pumps . 48
Annex E (informative) Numerical examples . 50
2
---------------------- Page: 4 ----------------------
oSIST prEN 16480:2014
prEN 16480:2014 (E)
E.1 Numerical example for the application of the methods described in Annex D . 50
E.2 Numerical example for the determination of the MEI-value according to Section 6 . 53
Annex F (informative) Application of mathematical statistics on tests . 55
F.1 Purposes of applying statistics in the frame of qualification and verification . 55
F.2 Confidence interval . 56
Annex G (informative) Measurement uncertainties . 59
G.1 General remarks . 59
G.2 Determination of the overall measurement uncertainty of efficiency . 61
Annex H (informative) Explanations concerning the methodology of the verification procedure
and the probability of the results . 63
Annex I (informative) Reporting of Test Results . 66
I.1 Test Report Requirements. 66
I.2 Pump test sheet . 66
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2009/125/EC, establishing a framework for the setting of
ecodesign requirements of energy related products and implemented by the EU
Regulation 547/2012 . 68
3
---------------------- Page: 5 ----------------------
oSIST prEN 16480:2014
prEN 16480:2014 (E)
Foreword
This document (prEN 16480:2014) has been prepared by Technical Committee CEN/TC 197 “Pump”, the
secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive.
For relationship with EU Directive, see informative Annex ZA, which is an integral part of this document.
4
---------------------- Page: 6 ----------------------
oSIST prEN 16480:2014
prEN 16480:2014 (E)
Introduction
Purpose and content of the standard
The water pumps within the scope of this European Standard are typically produced and sold by pump
manufacturers as series of large to very large numbers. The performance characteristics of pumps of one size
produced by a manufacturer show some scatter caused by manufacturing tolerances, but are described by
mean values and curves which represent that size.
The total consumption of electric energy by water pumps installed in applications within the scope of this
European Standard depends on the total number of installed pumps of each size and on its mean efficiency.
The quality of a size in respect to its mean efficiency is quantitatively described by the Minimum Efficiency
Index (MEI) which is defined and used in this standard. To achieve a certain value of the Minimum Efficiency
Index (MEI), a corresponding minimum value of the mean efficiency of a size is required.
This European Standard defines – for each pump type and size within the scope of the standard - the
minimum required value of efficiency depending on the value of the Minimum Efficiency Index (MEI). Also, this
standard prescribes how the value of the Minimum Efficiency Index (MEI) of a pump size indicated by the
manufacturer can be verified by an independent institution (e.g. in the frame of market surveillance). For the
manufacturer of the pump size it is generally left free how to prove the indicated value of the Minimum
Efficiency Index (MEI) of a size. Nevertheless, this standard describes also a method to prove by the
manufacturer that the mean values of efficiency meet the requirements for indicating a certain value of the
Minimum Efficiency Index (MEI).
Normally, the qualification of a pump size for a certain MEI value done by the manufacturer will be based on
tests and evaluations on a sample of test pumps of this size. Tests and evaluations carried out for the purpose
of qualifying the corresponding size must fulfill certain requirements:
• From the tests on the sample pumps, it must be possible to predict for the corresponding size the
confidence intervals within which the true mean values of efficiencies which are relevant for the
qualification are enclosed with a sufficiently high probability. Only in that way, the qualification of the size
in respect to a required and/or indicated value of Minimum Efficiency Index (MEI) will make sure that the
aspired effect of energy saving will be reached.
• If a pump size has been qualified according to the criteria described in this European Standard, every
test on one or more test pump(s) of the same size (with a full impeller diameter) which is carried out in
the frame of a verification procedure shall result with a very high probability in a confirmation of the
qualification.
Caused by technical alignment procedures of the single pump components e.g. bearings or shaft seals the
performance of the pump is gained after a certain running-in time.
Alternative ways to prove and to verify the Minimum Efficiency Index (MEI) of a pump size
This European Standard permits and describes different ways how manufacturers can achieve the
qualification of a pump size for a certain value of the Minimum Efficiency Index (MEI) and how this
qualification can be verified by an independent institution.
For the manufacturer it is generally left free to choose and apply appropriate methods to prove that the mean
efficiency values of a size are at least equal to or higher than particular threshold values of efficiency. These
particular threshold values of efficiency are related to the value of the Minimum Efficiency Index (MEI) to be
indicated for the size. The way to determine these values of efficiency is described in this standard. If the way
chosen by the manufacturer to prove the MEI value of a size deviates from the way mentioned in the next
5
---------------------- Page: 7 ----------------------
oSIST prEN 16480:2014
prEN 16480:2014 (E)
paragraph, the manufacturer has to document all tests, evaluations and/or calculations which are carried out
and the methods which are applied to prove the justification of the indicated MEI value.
If the manufacturer decides to determine the mean performance values of the size by one of the methods
described in Annex D of this standard, he has to carry out tests according to the requirements given in clause
5.2 to 5.4 of this standard and evaluations as described in clause 5.5 of this standard and to prove – as
described in Section 6 of this standard – that the criteria for the achievement of a certain value of the Minimum
Efficiency Index (MEI) of the size are fulfilled. The test conditions, the results of test evaluation and the
fulfillment of the criteria must be documented and stored for a defined time period as described in clause 5.2.
For an independent institution, two ways are possible and permitted by this standard to verify the value of
Minimum Efficiency Index (MEI) indicated by the manufacturer:
1) If the documentation of the qualification is presented by the manufacturer to the independent
institution on request, the procedure of verification executed by the independent institution is based
on the documentation of tests and evaluations done and documented by the manufacturer. In this
case, the documentation will be checked by the independent institution in respect to being in
accordance with requirements and criteria given in this standard.
2) If no documentation is presented by the manufacturer on request or if the documentation presented
by the manufacturer on request is not accepted as proof of the indicated value of MEI, the
independent institution carries out tests on pumps of the size in question according to the
requirements given in clauses 5.2 to 5.4 of this standard as well as evaluations as described in
clause 5.5 of this standard and applies the methodology and procedure described in Section 4 of this
standard.
Relevance of Sections of this standard for manufacturers or independent institutions
Section 4 describes nominal values of minimum required efficiency for a certain value of the Minimum
Efficiency Index (MEI) and is generally relevant for manufacturers and independent institutions when applying
this standard.
Section 5 is concerned with mean values of a pump size which are relevant for manufacturers to prove that a
pump size achieves a certain value of the Minimum Efficiency Index (MEI).
Section 6 describes the methodology and procedure to be applied by an independent institution in the case
that the Minimum Efficiency Index (MEI) of a size indicated by the manufacturer shall be verified by third party
tests on pumps of this size.
Section 7 specifies test procedures, test conditions and evaluations and has to be applied
by a manufacturer in the case that he decides to determine mean values of a size by tests on sample
pumps of this size (e.g. by methods described in Annex E),
by an independent institution in the case that the Minimum Efficiency Index (MEI) of a pump size
shall be verified by the procedure described in Section 6.
Section 6 describes the procedure to be applied by a manufacturer in order to determine particular threshold
values of efficiency for a certain value of the Minimum Efficiency Index (MEI) of a size and to prove the
justification of this MEI value by the fulfillment of criteria for the mean efficiency values.
6
---------------------- Page: 8 ----------------------
oSIST prEN 16480:2014
prEN 16480:2014 (E)
1 Scope
1.1 Pump technology
This document covers glanded water pumps for pumping clean water, including where integrated in other
products. Pumps designed and produced as low duty pumps for pressures up to 16 bar for end suction pumps
and up to 25 bar for multistage pumps, temperatures between -10 and +120°C, for clean water, in all kinds of
materials. See Annex A for further information.
1.2 Pump types
• End suction and in-line pumps for design pressure up to 16 bar (incl. EN 733 or equivalent).
• Vertical multistage pumps with design pressures up to 25 bar.
• Submersible multistage pumps designed to operate in boreholes at operating temperatures within a
range from 0°C to 90°C.
• For special design of pump types specified in this paragraph the test procedure described in section
5.5.4 shall be considered.
NOTE The pump types and sizes within the scope are typically mass produced pumps. Larger pumps at the upper
end of the scope might be produced in smaller numbers.
1.3 Application of this European Standard
Figure 1 shows how this European Standard has to be applied.
7
---------------------- Page: 9 ----------------------
oSIST prEN 16480:2014
prEN 16480:2014 (E)
Figure 1 — Scheme of application of this standard
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.
ISO 31, General principles concerning quantities, units and symbols
ISO 2186, Fluid flow in closed conduits — Connections for pressure signal transmissions between primary
and secondary elements
ISO 5167-1, Measurement of fluid flow by means of pressure differential devices — Part 1: Orifice plates,
nozzles and Venturi tubes inserted in circular cross section conduits running full
ISO 5198, Centrifugal, mixed flow and axial pumps — Code for hydraulic performance tests — Precision class
ISO 9104, Methods of evaluating the performance of electromagnetic flowmeters for liquids in closed conduits
ISO 9906, Rotodynamic pumps – Hydraulic performance acceptance test – Classes 1, 2 and 3
ISO 2854: Statistical interpretation of data – Techniques of estimation and tests relating to means and
variances
8
---------------------- Page: 10 ----------------------
oSIST prEN 16480:2014
prEN 16480:2014 (E)
ISO 2602: Statistical interpretation of test results - Estimation of the mean – Confidence interval
3 Terms and definitions
3.1 General
For the purposes of this European Standard, the quantities, definitions, symbols and units given in ISO 9906
and in section 3.2 apply. Section 3.2 gives specific definitions of terms - in deviation of ISO 9906 - used in this
European Standard, together with any associated symbols which have been allocated and is based on
ISO 31.
Table 1 gives an alphabetical list of symbols used and table 2 gives a list of subscripts. As far as possible, the
quantities, definitions and symbols used in this standard comply with those used in ISO 9906. Quantities,
definitions and symbols used in ISO 9006, but not needed in this standard are not contained section 3.2 and
tables 1, 2 while these tables contain some quantities, definitions and symbols which are not used in
ISO 9906.
In this European Standard all equations are given in coherent SI-units.
3.2 List of quantities with definitions
Terms and definitions from ISO 9906 + additions like MEI
3.2.1
Reynolds number
Dimension less number that gives a measure of the ratio of inertial forces to viscous forces and consequently
quantifies the relative importance of these two types of forces for given flow conditions. In this standard, it is
defined by the relation:
D ⋅ u
imp
Re=
ν
where u is the peripheral velocity at the outer impeller diameter D
imp
3.2.2
(Volume) rate of flow
The rate of flow designates the external rate of flow of the pump, i.e. the rate of flow discharged into the pipe
from the outlet branch of the pump.
Note 1 to entry: Losses or abstractions inherent to the pump, i.e.:
− discharge necessary for hydraulic balancing of axial thrust;
− cooling of bearings of the pump itself;
− water seal to the packing;
Note 2 to entry: Leakage from the fittings, internal leakage, etc., is not to be reckoned in the rate of flow. On the
contrary, all derived flows for other purposes, such as cooling of the motor bearings; cooling of a gear box (bearings, oil
cooler), etc. are to be reckoned in the rate of flow.
Note 3 to entry: Whether and how these flows must be taken into account depends on the location of their derivation
and of the section of flow-measurement respectively.
3.2.3
Driver power input
The power absorbed by the pump driver
9
---------------------- Page: 11 ----------------------
oSIST prEN 16480:2014
prEN 16480:2014 (E)
3.2.4
Pump efficiency
P
Pump power output
u
η= =
Pump power input
P
3.2.5
Driver efficiency
P Pump power input
η = =
dr
Driver power input
P
gr
3.2.6
Overall efficiency
P
Pump power output
u
η = =
gr
Driver power input
P
gr
3.2.7
Specific speed
Dimensional number characterising the impeller type (radial, semi-axial, axial) of rotodynamic pumps
Q
BEP
n = n ⋅
s N
0.75
H
BEP
Note 1 to entry: For multistage pumps, H is the head per stage which results from dividing the total pump head at
BEP
the point of best efficiency by the number of stages i
3.2.8
Minimum efficiency index (MEI)
Value which determines the minimum required efficiency for the qualification criteria and, thereby, is a
measure of the quality of a pump size in respect to efficiency.
3.3 Lists of basic letters and subscripts
10
---------------------- Page: 12 ----------------------
oSIST prEN 16480:2014
prEN 16480:2014 (E)
3.4
Table 1 — Alphabetical list of basic letters used as symbols
Symbol Quantity Unit
2
A Area m
C Constant pure number
D Diameter m
e Measurement uncertainty, relative value pure number
-1
f Frequency s , Hz
2
g Acceleration due to gravity m/s
H Pump total head m
k number of instrument readings or pure number
sample pumps
m Mass kg
M number of pumps of a sample pure number
-1 -1
n Speed of rotation s , min
N Number of instrument readings pure number
-1
n Specific speed min
s
p Pressure Pa
p Probability pure number
P Power W
3
Q (Volume) rate of flow m /s
s Standard deviation of a sample according to special quantity
t Tolerance factor, relative value pure number
t Time s
t Student´s factor pure number
T Torque Nm
u Peripheral velocity m/s
U Mean velocity m/s
U Voltage V
v Local velocity m/s
3
V Volume m
x General quantity according to special quantity
y General quantity according to special quantity
z Height above reference plane m
z number of produced pumps pure number
η Efficiency pure number
θ Temperature °C
2
ν Kinematic viscosity m /s
3
ρ Density kg/m
ω Angular velocity rad/s
σ Standard deviation of normal distribution according to special quantity
For a list of concise designations (short term description) of pump types in scope see Annex B.
11
---------------------- Page: 13 ----------------------
oSIST prEN 16480:2014
prEN 16480:2014 (E)
Table 2 — List of letters and figures used as subscripts
Subscript Meaning
1 inlet
2 outlet
abs absolute
amb ambient
annual per year
curve on fitting curve
BEP at best efficiency point
dr driver
D datum
exp experimentally determined
gr combined motor/pump unit (overall)
G guaranteed
H pump total head
i numbering index
j numbering index
imp impeller
man manufacturing
max maximum permissible
mean mean value of pump series
min,requ minimum required
N nominal
OL overload
pd pre-defined
P power
PL part load
Q (volume) flow rate
r random
s specific, systematic
sync synchronous
tot total, overall
true true value
T torque
t translated
u useful
v vapour
x of quantity x
y % for probability of y %
η efficiency
3.5 General definitions
3.4.1
Qualification
In this European Standard, the criteria are described which have to be fulfilled to qualify a pump size in
respect to a certain value of the Minimum Efficiency Index (MEI). For the purpose of qualification, the
manufacturer of the pump size has to prove by appropriate methods the fulfillment of the efficiency criteria
defined in this standard. Generally, the qualification criteria refer to the mean values of the size which are valid
for the full impeller diameter and which will be determined by tests and evaluations on pumps of the respective
size. These mean efficiency values and their confidence intervals have to be compared to nominal values of
minimum required efficiency. Also these values depend on parameters (see Section 4) the values of which
partly result from the tests and can only be determined with some uncertainty or tolerance. Therefore, so-
called particular threshold values of efficiency are determined and used in the frame of the qualification
procedure for comparison with the mean values.
12
---------------------- Page: 14 ----------------------
oSIST prEN 16480:2014
prEN 16480:2014 (E)
3.4.2
Verification of the qualification
After a pump size has been qualified by the manufacturer and placed on the market, an independent
institution may check the result of the qualification procedure. In this case, the tests and the evaluation of the
test data have to be carried out according to Section 5 of this European Standard. The decision has to be
taken according to the procedure described in Section 7 of this European Standard.
3.4.3
Independent institution
Based on European directives and/or national legislation, some institutions may be authorized – in the frame
of market surveillance - to check the justification of MEI values indicated by manufacturers. These institutions
are generally called independent institutions whatever the special type of the institution (non-governmental
organisation (NGO), neutral institute, market surveillance authorities or similar) may be.
3.4.4
Minimum Efficiency Index (MEI)
The Minimum Efficiency Index (MEI) is a measure for the quality of a pump size in res
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.