EN ISO 13350:2015

SLOVENSKI STANDARD
01-februar-2016
1DGRPHãþD
SIST EN ISO 13350:2009
Ventilatorji - Preskus lastnosti indukcijskih ventilatorjev (ISO 13350:2015)
Fans - Performance testing of jet fans (ISO 13350:2015)
Ventilatoren - Leistungsmessung von Strahlventilatoren (ISO 13350:2015)
Ventilateurs - Essai de performance des ventilateurs accélérateurs (ISO 13350:2015)
Ta slovenski standard je istoveten z: EN ISO 13350:2015
ICS:
23.120 =UDþQLNL9HWUQLNL.OLPDWVNH Ventilators. Fans. Air-
QDSUDYH conditioners
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 13350
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2015
EUROPÄISCHE NORM
ICS 23.120 Supersedes EN ISO 13350:2008
English Version
Fans - Performance testing of jet fans (ISO 13350:2015)
Ventilateurs - Essai de performance des ventilateurs Ventilatoren - Leistungsmessung von
accélérateurs (ISO 13350:2015) Strahlventilatoren (ISO 13350:2015)
This European Standard was approved by CEN on 21 February 2015.

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
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13350:2015 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 13350:2015) has been prepared by Technical Committee ISO/TC 117 "Fans" in
collaboration with Technical Committee CEN/TC 156 “Ventilation for buildings” the secretariat of which
is held by BSI.
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 April 2016, and conflicting national standards shall be
withdrawn at the latest by April 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 supersedes EN ISO 13350:2008.
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.
Endorsement notice
The text of ISO 13350:2015 has been approved by CEN as EN ISO 13350:2015 without any modification.
INTERNATIONAL ISO
STANDARD 13350
Second edition
2015-10-01
Fans — Performance testing of jet fans
Ventilateurs — Essai de performance des ventilateurs accélérateurs
Reference number
ISO 13350:2015(E)
©
ISO 2015
ISO 13350:2015(E)
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
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Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2015 – All rights reserved

ISO 13350:2015(E)
Contents Page
Foreword .v
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 4
5 Characteristics to be measured . 5
5.1 General . 5
5.2 Thrust. 6
5.3 Input power . 6
5.4 Sound levels . 6
5.5 Vibration velocity. 6
5.6 Volume flowrate . 6
6 Instrumentation and measurements . 6
6.1 Dimension and areas . 6
6.2 Rotational speed . 6
6.3 Thrust. 6
6.3.1 Force balance systems . . . 6
6.3.2 Force transducers. 6
6.4 Input power . 7
6.5 Sound level . 7
6.6 Vibration velocity. 7
6.7 Volume flowrate . 7
6.7.1 Instruments for the measurement of pressure . 7
6.7.2 Instruments for the measurement of temperature . 7
7 Determination of thrust . 7
7.1 General . 7
7.2 Suspended configuration . 7
7.3 Supported configuration . 9
7.4 Test procedures .12
7.5 Test enclosure .13
8 Determination of sound level .13
8.1 General .13
8.2 Test arrangement .14
8.3 Enclosure suitability .15
8.4 Measurement procedure .15
9 Determination of vibration velocity .16
9.1 General .16
9.2 Test arrangement .16
9.3 Test procedure .16
9.4 Acceptance vibration velocity .16
10 Determination of flowrate .17
10.1 General .17
10.2 Upstream chamber method .17
10.3 Upstream Pitot traverse method .18
10.4 Directly connected flowrate-measuring device .18
11 Presentation of results .20
11.1 Product description .20
11.2 Product performance .21
ISO 13350:2015(E)
12 Tolerances and conversion rules .21
12.1 Tolerances .21
12.2 Conversion rules .21
Annex A (informative) Illustration of reference sound source .24
Annex B (informative) Correction of sound pressure levels .25
Annex C (informative) Non-dimensional coefficients .26
Annex D (normative) Efficiency based on thrust measurements .28
Bibliography .30
iv © ISO 2015 – All rights reserved

ISO 13350:2015(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document can be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 117, Fans.
This second edition cancels and replaces the first edition (ISO 13350:1999) which has been technically
revised. The main changes are the following:
— General (dated references on standards updated, e.g. ISO 5801:2007);
— Clause 2 “Normative references” (references supplemented and updated);
— Clause 3 “Terms and definitions” (addition of 3.2.1 “gross fan outlet area”, 3.5.1 “motor input power”,
3.5.2 “impeller power”, 3.8.2 “thrust/motor input power ratio”);
— Figure 1 “Gross and effective fan outlet areas” (modified by marking of “gross fan outlet area A ”);
— Clause 4 “Symbols and abbreviated terms” (supplemented and updated);
— 6.4 “Input power” (correction for density);
— 7.1 “Determination of thrust” (correction for density);
— 7.4 “Test procedures” (change of recommended calibration intervals);
— Figure 7 “Thrust measuring enclosure” (modified by reducing the minimum distance between fan
casing and floor/ceiling/wall);
— 8.1 “Determination of sound level” (Introduction of possibility to use other International Standards e.g.
ISO 13347);
— 8.3 “Enclosure suitability” (requirement on running speed of the reference sound source deleted);
— 9.2 “Test arrangement” for determination of vibration velocity (Figure 9 “Vibration measuring position
for jet fans” and requirement to use this configuration deleted);
— 9.3 “Test procedure” (general reference to ISO 14695);
ISO 13350:2015(E)
— 10.2 “Upstream chamber method” (“venturi nozzle” replaced by “bellmouth”);
— 10.4 “Directly connected flowrate-measuring” (“venturi nozzle” replaced by “bellmouth”);
— 11.2 “Product performance” (reference to density 1,2 kg/m added);
— Annex C (informative) (change of title: “Conversion rules” replaced by “Non-dimensional coefficients”);
— Annex C (informative) (several character changed);
— Annex C (informative) (subclause on “Non-dimensional thrust/power ratio” added);
— Annex D (normative) (new normative Annex on “Efficiency based on thrust measurements”).
vi © ISO 2015 – All rights reserved

ISO 13350:2015(E)
Introduction
The need for a new edition of ISO 13350 has been evident for some time. The use of the so-called
jet fan to assist in the control of quality of air in vehicle and train tunnels has become increasingly
popular. Longitudinal methods of ventilation can show advantages in both capital cost and running cost
compared to alternative systems. Smoke and pollution control in emergency conditions can be readily
provided. Jet fans can also be used for ventilation and smoke control in enclosed car parks.
This International Standard deals with the determination of those performance criteria essential to the
correct application of jet fans. In describing the test and rating procedures, numerous references are
made to ISO 5801 as well as to other relevant International Standards.
INTERNATIONAL STANDARD ISO 13350:2015(E)
Fans — Performance testing of jet fans
1 Scope
This International Standard deals with the determination of those technical characteristics needed
to describe all aspects of the performance of jet fans as defined in ISO 13349. It does not cover those
fans designed for ducted applications, nor those designed solely for air circulation, e.g. ceiling fans
and table fans.
The test procedures described in this International Standard relate to laboratory conditions. The
measurement of performance under on-site conditions is not included.
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 1940-1, Mechanical vibration — Balance quality requirements for rotors in a constant (rigid) state —
Part 1: Specification and verification of balance tolerances
ISO 3744, Acoustics — Determination of sound power levels and sound energy levels of noise sources using
sound pressure — Engineering methods for an essentially free field over a reflecting plane
ISO 5801:2007, Industrial fans — Performance testing using standardized airways
ISO 13347 (all parts), Industrial fans — Determination of fan sound power levels under standardized
laboratory conditions
ISO 13349, Fans — Vocabulary and definitions of categories
ISO 14694, Industrial fans — Specifications for balance quality and vibration levels
ISO 14695, Industrial fans — Method of measurement of fan vibration
IEC 60034-2-1, Rotating electrical machines — Part 2-1: Standard methods for determining losses and
efficiency from tests (excluding machines for traction vehicles)
IEC 60034-14, Rotating electrical machines — Part 14: Mechanical vibration of certain machines with shaft
heights 56 mm and higher — Measurement, evaluation and limits of the vibration severity
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 13349, ISO 5801 and the
following apply.
3.1
effective fan dynamic pressure
p
d
conventional quantity representative of the dynamic component of the fan output, calculated, in the
particular case of a jet fan, from the effective fan outlet velocity and the inlet density
Note 1 to entry: The effective fan dynamic pressure will not be the same as the average of the dynamic pressures
across the section because it excludes from consideration that part of the dynamic energy flux, which is due only
to departures from uniform axial velocity distribution.
ISO 13350:2015(E)
3.2.1
gross fan outlet area
A
surface plane bounded by the downstream extremity of the air-moving device
Note 1 to entry: Gross fan outlet area is, by convention, taken as the gross area in the outlet plane inside the
casing or duct or silencer, (see Figure 1) without taken into account any obstructions inside the fan outlet.
3.2.2
effective fan outlet area
A
eff
outlet area with deductions for motors, fairings, or other obstructions (in the particular case
of a jet fan)
Note 1 to entry: If the silencer centrebody reaches the outlet plane of the fan, then, the effective fan outlet area is
defined as the annulus area at the fan outlet plane, as shown in Figure 1a).
Note 2 to entry: If the fan has a silencer without centrebody [see Figure 1b)], the effective fan outlet area will be
close to the cross- sectional area inside the silencer in order to clear any exit bellmouth form.
Note 3 to entry: If the centrebody (motor or silencer core) does not extend to the outlet plane, the effective fan
outlet area will approach the annulus area between the casing and the motor, but with some increase, as defined
in Figure 1c), for the distance between the centrebody and the outlet. Where the motor is on the upstream side,
Figure 1c) is applied to the impeller hub rather than the motor, as illustrated.
Note 4 to entry: For comparisons within the scope of research and development, alternative definitions have
been used with some success.
Figure 1 — Gross and effective fan outlet areas
3.3
effective fan outlet velocity
v
eff
velocity calculated from thrust at standard conditions, the standard air density, and the effective
fan outlet area
Note 1 to entry: See 11.2.
3.4
fan outlet velocity
v
velocity calculated from the thrust at standard conditions, divided by gross fan outlet area, A
3.5.1
motor input power
P
e
electrical power supplied at the terminals of the electric motor drive
2 © ISO 2015 – All rights reserved

ISO 13350:2015(E)
3.5.2
impeller power
P
r
mechanical power supplied to the impeller of the fan
3.5.3
fan air power
P
u
conventional power output at standard conditions; in the particular case of a jet fan, product of inlet
volume flow and effective fan dynamic pressure
3.6
impeller tip speed
v
p
peripheral speed of the impeller blade tips
3.7
thrust
T , T
m c
fan thrust measured (T ) or calculated (T ) in accordance with this International Standard at
m c
standard conditions
3.8.1
thrust/impeller power ratio
r
r
thrust divided by impeller power
Note 1 to entry: The thrust/impeller power ratio is calculated as r = T /P .
r m r
3.8.2
thrust/motor input power ratio
r
e
thrust divided by motor input power
Note 1 to entry: The thrust/motor input power ratio is calculated as r = T /P .
e m e
3.9
fan guard
guard designed to prevent the ingestion of relatively large foreign bodies, such as drink cans, and
sometimes fitted to the inlet and outlet of jet fans
Note 1 to entry: Guards can have a marked effect on the thrust performance and noise level. Where they are
specified, measurements should be made with these guards in place.
3.10
chamber
airway in which the air velocity is small compared with that at the fan inlet or outlet
3.11
test enclosure
room, or other space protected from draught, in which the fan and test airways are situated
3.12
impeller balance grade
G grade as specified in ISO 14694
3.13
fan vibration velocity
unfiltered root mean square (r.m.s.) vibration velocity over the frequency range 10 Hz to 10 kHz
measured in accordance with this International Standard and with ISO 14695
ISO 13350:2015(E)
3.14
fan impeller efficiency
η
r
fan air power divided by impeller power
3.15
fan overall efficiency
η
e
fan air power divided by motor input power
3.16
sound pressure level
L
p
ten times the logarithm to the base 10 of the ratio of the square of the sound pressure radiated by the
sound source under test to the square of the reference sound pressure
3.17
sound power level
L
W
ten times the logarithm to the base 10 of the ratio of the sound power radiated by the sound source
under test to the reference sound power
3.18
inlet sound power level
L
W1
sound power level of the fan determined at the fan inlet
3.19
outlet sound power level
L
W2
sound power level of the fan determined at the fan outlet
3.20
noise frequency range of interest
frequency range including the octave bands with centre frequencies between 63 Hz and
8 000 Hz and the one-third octave bands with centre frequencies between 50 Hz and 10 000 Hz
4 Symbols and abbreviated terms
The following symbols and units shall apply for the parameters listed.
Abbreviated term/represented quantity Symbol SI unit
Impeller annulus area A m
a
Gross fan outlet area A m
Effective fan outlet area A m
eff
Nominal fan diameter D m
R
Length of upstream chamber side D m
Sound pressure level L dB (re 20 μPa)
p
Average sound pressure level of the measured device L dB (re 20 μPa)
p(m)
Average sound pressure level of the reference sound source L dB (re 20 μPa)
p(r)
Sound power level L dB (re 1 pW)
W
Inlet sound power level L dB (re 1 pW)
W1
NOTE: (T) denotes the term or quantity stated to be a function of the thrust (see Annex D). Example: η (T) is the fan overall
e
efficiency based on thrust.
4 © ISO 2015 – All rights reserved

ISO 13350:2015(E)
Abbreviated term/represented quantity Symbol SI unit
Outlet sound power level L dB (re 1 pW)
W2
Sound power level of the reference sound source L dB (re 1 pW)
W(r)
Rotational speed n revolution/s
Differential pressure across a flow measuring device p Pa
Gauge pressure at the fan outlet p Pa
e2
Gauge pressure in the fan chamber p Pa
e2
Effective fan dynamic pressure p Pa
d
Volume flow q m /s
v
Impeller balance grade (ISO 14694) G μm
Motor input power P W
e
Impeller power P W
r
Fan air power P W
u
Thrust/impeller power ratio r N/W
r
Thrust/motor input power ratio r N/W
e
Non-dimensional thrust/power ratio r —
t
Calculated thrust T N
c
Measured thrust T N
m
Impeller tip speed v m/s
p
Effective fan outlet velocity v m/s
eff
Fan outlet velocity v m/s
Mean throughflow velocity in a tunnel at a specified section v m/s
t
Total pressure rise Δp Pa
3 3
Standard air density 1,2 kg/m ρ kg/m
Inlet density taken as equal to the density in the test enclosure ρ kg/m
a
Efficiency based on thrust η (T) —
r
Fan overall efficiency η —
e
Motor efficiency η —
m
Fan impeller efficiency η —
r
Fan overall efficiency based on thrust η (T) —
e
Flow coefficient φ —
Thrust coefficient Θ —
Power coefficient ϕ —
r
NOTE: (T) denotes the term or quantity stated to be a function of the thrust (see Annex D). Example: η (T) is the fan overall
e
efficiency based on thrust.
5 Characteristics to be measured
5.1 General
In order that a jet fan be correctly applied and give satisfactory performance and reliability in service,
it is necessary to determine a number of technical performance characteristics in addition to knowing
the more obvious mechanical features, such as mass, overall dimensions, and installation dimensions.
ISO 13350:2015(E)
5.2 Thrust
Friction on the tunnel walls, inlet, and outlet losses and sometimes traffic drag, combined with climatic
effects at tunnel portals, create a pressure drop through the tunnel. The pressure drop is matched by the
sum of the pressure increases by the jet fans due to the momentum transfer between fan discharge airflow
and airflow in the tunnel. As it is impossible to measure the momentum of the fan discharge airflow, and
the rate of change in momentum is equal and opposite to the thrust, thrust is measured instead.
5.3 Input powe
...