SIST EN 13487:2019

SLOVENSKI STANDARD
SIST EN 13487:2019
01-december-2019
Nadomešča:
SIST EN 13487:2004
Prenosniki toplote - Zračno hlajeni kondenzatorji in hladilniki kapljevine s prisilno
konvekcijo - Merjenje hrupa
Heat exchangers - Forced convection air cooled refrigerant condensers and dry coolers -
Sound measurement
Wärmeübertrager - Ventilatorbelüftete Kältemittelverflüssiger und Trockenkühltürme -
Schallmessung
Echangeurs thermiques - Aérocondenseur à convection forcée et batterie froide -
Mesurage du bruit
Ta slovenski standard je istoveten z: EN 13487:2019
ICS:
17.140.20 Emisija hrupa naprav in Noise emitted by machines
opreme and equipment
27.060.30 Grelniki vode in prenosniki Boilers and heat exchangers
toplote
SIST EN 13487:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 13487:2019

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SIST EN 13487:2019


EN 13487
EUROPEAN STANDARD

NORME EUROPÉENNE

August 2019
EUROPÄISCHE NORM
ICS 17.140.20; 27.060.30 Supersedes EN 13487:2003
English Version

Heat exchanger - Forced convection air cooled refrigerant
condensers and dry coolers - Sound measurement
Echangeurs thermiques - Aérocondenseur à convection Wärmeübertrager - Ventilatorbelüftete
forcée et batterie froide - Mesurage du bruit Kältemittelverflüssiger und Trockenkühltürme -
Schallmessung
This European Standard was approved by CEN on 17 June 2019.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, 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 13487:2019 E
worldwide for CEN national Members.

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EN 13487:2019 (E)
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
1.1 General . 6
1.2 Size of source . 6
1.3 Object . 6
2 Normative references . 7
3 Terms and definitions . 8
4 Description of apparatus types . 11
5 Sound power determination . 13
5.1 General . 13
5.2 Microphone positions and measurement surface for essentially free field conditions
over reflecting plane and sound intensity measurements . 13
5.3 Microphone positions in hard-walled test rooms or special reverberation test rooms . 14
5.4 Background noise . 14
5.5 Calculation of sound power . 14
6 Emission sound pressure level determination . 14
7 Installation and mounting conditions . 15
7.1 Location . 15
7.2 Mounting . 15
8 Operating conditions . 15
8.1 General . 15
8.2 Supply of electrical energy. 15
8.3 Fan speed setting . 16
9 Measurement uncertainties . 16
10 Information to be recorded . 16
10.1 General . 16
10.2 Noise source under test . 16
10.3 Test environment . 17
10.4 Instrumentation . 17
10.5 Acoustical data . 17
11 Information to be reported . 18
11.1 General . 18
11.2 Noise source under test . 18
11.3 Test environment . 18
11.4 Instrumentation . 18
11.5 Acoustical data . 19
12 Declaration and verification of noise emission values . 19
Annex A (normative) Calculation of the sound power with different partial measuring
surfaces in accordance with EN ISO 3744 and EN ISO 3746 . 20
Annex B (normative) Simplified arrangement of measuring points . 21
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Annex C (informative) Example of dual-number declaration . 25
Annex D (normative) Deviations from the test subject . 26
Annex E (informative) Directivity . 27
Bibliography . 28

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EN 13487:2019 (E)
European foreword
This document (EN 13487:2019) has been prepared by Technical Committee CEN/TC 110 “Heat
exchangers”, the secretariat of which is held by DIN.
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 February 2020 and conflicting national standards shall
be withdrawn at the latest by February 2020.
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.
This document supersedes EN 13487:2003.
The main changes compared to the previous edition are:
a) the Scope was completely revised;
b) the Normative references were updated;
c) Terms and Definitions were updated and new terms were introduced;
d) the whole document, including Annexes, was completely revised and rearranged.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
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Introduction
This document is one of a series dedicated to heat exchangers.
This document provides information for assessing and presenting the acoustic characteristics of heat
exchangers in fan operation.
This document also provides information necessary for specifying and selecting the product which best
suits the needs of the purchaser.
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1 Scope
1.1 General
This document is one of a series dedicated to air-cooled heat exchangers.
— forced convection air cooled refrigerant condensers as specified in EN 327;
— forced convection unit air coolers for refrigeration as specified in EN 328;
— air cooled liquid coolers "dry coolers" as specified in EN 1048.
This document provides information for assessing and presenting the acoustic emission characteristics
of heat exchangers under stationary operating conditions.
This document is applicable to selfstanding forced convection air cooled refrigerant condensers and air
cooled liquid coolers "dry coolers" and air coolers.
1.2 Size of source
The method specified in EN ISO 3744, EN ISO 3745, EN ISO 3746, EN ISO 9614-1, EN ISO 9614-2 and
EN ISO 9614-3 is applicable to noise sources of any size. Limitations for the size of the source are given
in 1.3 of EN ISO 3741:2010, EN ISO 3743-1:2010 and EN ISO 3743-2:2009.
1.3 Object
This document offers ways to determine the sound power level of units. Some of them are specifically
adapted to provide results with low uncertainties, by using laboratory class or engineering class
acoustic methods under highly controlled working conditions. Those results are suitable for
certification, labeling and marking purposes.
This document is concerned with objective methods for determining sound power levels L , expressed
W
in decibels (dB) with reference to a sound power of one picowatt (1 pW), of airborne acoustical noise
within the specified frequency range of interest and for prescribed operating conditions of the
appliance to be measured:
— A-weighted sound power level, L ;
WA
— spectral sound power levels;
— emission sound pressure level at workplace, L .
pA
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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 ISO 3741:2010, Acoustics - Determination of sound power levels and sound energy levels of noise
sources using sound pressure - Precision methods for reverberation test rooms (ISO 3741:2010)
EN ISO 3743-1:2010, Acoustics - Determination of sound power levels and sound energy levels of noise
sources using sound pressure - Engineering methods for small movable sources in reverberant fields - Part
1: Comparison method for a hard-walled test room (ISO 3743-1:2010)
EN ISO 3743-2:2009, Acoustics - Determination of sound power levels of noise sources using sound
pressure - Engineering methods for small, movable sources in reverberant fields - Part 2: Methods for
special reverberation test rooms (ISO 3743-2:1994)
EN ISO 3744:2010, 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 3744:2010)
EN ISO 3745:2012/A1:2017, Acoustics - Determination of sound power levels and sound energy levels of
noise sources using sound pressure - Precision methods for anechoic rooms and hemi-anechoic rooms -
Amendment 1 (ISO 3745:2012/Amd 1:2017)
EN ISO 3746:2010, Acoustics - Determination of sound power levels and sound energy levels of noise
sources using sound pressure - Survey method using an enveloping measurement surface over a reflecting
plane (ISO 3746:2010)
EN ISO 4871, Acoustics - Declaration and verification of noise emission values of machinery
and equipment (ISO 4871)
EN ISO 9614-1:2009, Acoustics - Determination of sound power levels of noise sources using sound
intensity - Part 1: Measurement at discrete points (ISO 9614-1:1993)
EN ISO 9614-2:1996, Acoustics - Determination of sound power levels of noise sources using sound
intensity - Part 2: Measurement by scanning (ISO 9614-2:1996)
EN ISO 9614-3:2009, Acoustics - Determination of sound power levels of noise sources using sound
intensity - Part 3: Precision method for measurement by scanning (ISO 9614-3:2002)
EN ISO 11203:2009, Acoustics - Noise emitted by machinery and equipment - Determination of emission
sound pressure levels at a work station and at other specified positions from the sound power level (ISO
11203:1995)
ISO 7574-4, Acoustics — Statistical methods for determining and verifying stated noise emission values of
machinery and equipment — Part 4: Methods for stated values for batches of machines
EN 60038, CENELEC standard voltages (IEC 60038)
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3 Terms and definitions
For the purposes of this document, the terms and definitions pertinent to the determination of sound
power levels given in EN ISO 3741, EN ISO 3743-1, EN ISO 3743-2, EN ISO 3744, EN ISO 3746,
EN ISO 9614-1, EN ISO 9614-2 and EN ISO 9614-3 and 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
3.1
forced convection air cooled refrigerant condenser
refrigeration system component that condenses refrigerant vapour by rejecting heat to air, which is
mechanically circulated over its dry heat transfer surface by integral fans and fan drives
Note 1 to entry: In the following "forced convection air cooled refrigerant condenser" is referred to as
"apparatus".
[SOURCE: EN 327:2014, 3.1]
Note 2 to entry: The heat transfer coil includes distributing and collecting headers.
3.2
forced convection air cooled liquid cooler
dry cooler
self contained system that cools a single phase liquid by rejecting sensible heat via a heat exchanger to
air that is mechanically circulated by integral fans
Note 1 to entry: In the following "forced convection air cooled liquid cooler; dry cooler" is referred to as
"apparatus".
[SOURCE: EN 1048:2014, 3.1]
3.3
forced convection unit air cooler
refrigeration system component transferring heat from air to a refrigerant or liquid, the air is
mechanically circulated over the heat transfer surface by integral fan(s) and fan drive(s)
Note 1 to entry: The heat transfer coil includes refrigerant distributing and collecting headers.
Note 2 to entry: In the following “forced convection unit air cooler” is referred to as “apparatus”.
3.4
emission sound pressure level
L
p
ten times the logarithm to the base 10 of the ratio of the square of the emission sound pressure, p, to the
square of the reference value, p , measured with a particular time weighting and a particular frequency
0
weighting
Note 1 to entry: Time and frequency weightings are selected from those defined in EN 61672-1 expressed in
decibels:
2
p
L = 10lg dB
p
2
p
0
where the reference value, p , is 20 μPa.
0
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Note 2 to entry: The emission sound pressure level shall be determined at a specified position in accordance
with either a test code for a specific family of machines or, if no test code exists, a method that complies with the
EN ISO 11200 series.
[SOURCE: EN ISO 11200:2014, 3.3]
3.5
sound power level
L
W
ten times the logarithm to the base 10 of the ratio of the sound power of a source, P, to a reference
value, P , expressed in decibels
0
P
L = 10lg dB
W
P
0
where the reference value, P , is 1 pW
0
Note 1 to entry: If a specific frequency weighting as specified in IEC 61672-1 and/or specific frequency bands
are applied, this is indicated by appropriate subscripts; e.g. L denotes the A-weighted sound power level.
WA
Note 2 to entry: This definition is technically in accordance with ISO 80000-8:2007[2], 8-23.
[SOURCE: ISO/TR 25417:2007, 2.9 and EN ISO 3744:2010, 3.21]
3.6
frequency range of interest
for general purposes, the frequency range of octave bands with nominal mid-band frequencies from
125 Hz to 8 000 Hz (including one-third octave bands with mid-band frequencies from 100 Hz to
10 000 Hz)
Note 1 to entry: For special purposes, the frequency range can be extended or reduced, provided that the test
environment and instrument specifications are satisfactory for use over the modified frequency range. Changes to
the frequency range of interest are included in the test report.
[SOURCE: EN ISO 3744:2010, 3.9]
Note 2 to entry: For sources which emit sound at predominantly high or low frequencies, the frequency range of
interest can be extended to include these frequencies.
3.7
reference box
hypothetical right parallelepiped terminating on the reflecting plane(s) on which the noise source
under test is located, that just encloses the source including all the significant sound radiating
components and any test table on which the source is mounted
Note 1 to entry: If required, the smallest possible test table can be used for compatibility with emission sound
pressure measurements at bystander positions in accordance with, for example, EN ISO 11201.
[SOURCE: EN ISO 3744:2010, 3.10]
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Note 2 to entry: The reference box encloses the whole casing, including, if applicable, its normal supporting legs,
fans, piping cover plates (see mark 1 in Figure 1) and control/junction boxes (see mark 2 in Figure 1).
Refrigerant/liquid connections, headers (collectors) and electrical supply cables are not taken into account when
determining the reference box. A typical model is given in Figure 1.

Key
1 piping cover plate
2 control/junction box
Figure 1 — Reference box
3.8
measurement surface
hypothetical surface of area, S, on which the microphone positions are located at which the sound
pressure levels are measured, enveloping the noise source under test and terminating on the reflecting
plane(s) on which the source is located
[SOURCE: EN ISO 3744:2010, 3.14]
3.9
background noise
noise from all sources other than the source under test
Note 1 to entry: Background noise includes contributions from airborne sound, noise from structure-borne
vibration, and electrical noise in the instrumentation.
[SOURCE: EN ISO 3744:2010, 3.15]
3.10
module
geometrically similar group of components from which, when multiplied by an integer number, an
apparatus is built
Note 1 to entry: A module typically comprises:
— fan with motor;
— a heat exchanger coil;
— a casing which ensures the conduction of the air flow as intended, including supporting legs for vertical
air flow.
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For the purposes of this standard, the significant characteristics of a module are:
— size of the fan and its arrangement relative to the heat exchanger;
— speed of the fan;
— fin and tube geometry;
— air inlet area of the heat exchanger coil;
— depth of the coil in direction of the air flow (number of rows deep).
3.11
test subject
apparatus with all parts necessary to function and in standard design without accessories
Note 1 to entry: This applies especially to the supporting legs (where applicable) and the heat exchanger coil.
3.12
usual test installation
maximum supporting leg height is lower than 1,5 times the fan diameter
4 Description of apparatus types
The object to be measured is the heat exchanger, presented by the cooling element, fan, gearing-
elements and the motor. In case of excluding parts noise emitting elements of the object; it has to be
reported in Clause 11. Typical models of heat exchangers are given in Figure 2.
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a) Induced draught – Horizontal construction

b) Forced draught – Horizontal construction

c) Induced draught – Two heat exchangers arranged in parallel

d) Induced draught – Two heat exchangers arranged in V shape

e) Induced draught – Vertical construction

f) Forced draught – Vertical construction

g) Forced draught – Two heat exchangers arranged in parallel

h) Forced draught – Two heat exchangers arranged in A-shape-
Figure 2 — Typical heat exchanger constructions
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In the case of electrical supply by an external frequency converter, the noise radiated by the converter
is excluded from the scope of this document; only the effect of non-sinusoidal voltage and current
within the machine is to be taken into account.
Auxiliary components required for the operation of the machine should be included when integrated
with the machine. When these components are separately mounted, they shall not be included as part of
the machine under test.
5 Sound power determination
5.1 General
The sound power radiated by the apparatus shall be determined on the basis of one of the following
basic standards:
— accuracy grade 1: EN ISO 3741, EN ISO 3745, EN ISO 9614-1, EN ISO 9614-3;
— accuracy grade 2: EN ISO 3743-1, EN ISO 3743-2, EN ISO 3744, EN ISO 9614-1, EN ISO 9614-2;
— accuracy grade 3: EN ISO 3746, EN ISO 9614-1, EN ISO 9614-2.
NOTE EN ISO 3740 can be used as guideline, to choose the best suitable basic standard for the measurement.
The measuring period shall be selected in accordance with the chosen method.
When undertaking measurements in accordance with EN ISO 9614-1, EN ISO 9614-2 and EN ISO 9614-3
the reading for the 8 kHz octave band is accepted.
Where an apparatus is used for vertical and horizontal air flow direction, the measurement with
vertical air flow direction is used as the basis for the evaluation of the sound data.
5.2 Microphone positions and measurement surface for essentially free field conditions
over reflecting plane and sound intensity measurements
5.2.1 General
The measurement surface is parallelepiped and enveloping the reference box in which all noise emitting
parts are included. Parts which are stick out of the reference box and are not noise emitting parts of the
object under test do not need to be considered. The measurement surface follows this reference box in a
distance d and ends on the reflecting plane.
The distance d between the reference box and the measuring surface shall be 1 m.
In exceptional cases (clear definable partial sound power sources of the heat exchanger complex) the
overall sound power level can be determined with partial sound power sources. In this case, all single
noise sources are covered with partial measurement surfaces.
The measurement points should be uniformly positioned on the measurement surface according to the
basic standard in use. For larger test objects, the number of measurement points will increase. A
simplified arrangement of the measurement points can be suitable, if comparison measurements show
that the sound field is uniform and the final result should generate similar or higher values than
measurements with entire number of measurement points.
Microphones shall be equipped with proper wind shields or nose cones.
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5.2.2 Usual test installation with simplified arrangement of measurement points
If the requirements for simplified arrangement of measuring points for class 2 and class 3 are fulfilled,
the following measurement points can be used:
— Annex B, B.1 for apparatus with vertical air flow types according to Figure 2a), Figure 2b), Figure
2c) and Figure 2d);
— Annex B, B.2 for apparatus with horizontal air flow types according to Figure 2e), 2f), 2g) and 2h).
NOTE It has been shown, that for usual test installation according to 3.12, the comparison of measurements
between the standard measurement points and the simplified arranged measurement points described in Annex B
generate similar or higher values.
5.2.3 Special test installation
For an apparatus with a fan arrangement and air flow, different from the usual test installation, the
measuring points shall be chosen analogous to the arrangement in accordance with basic standard in
use.
5.3 Microphone positions in hard-walled test rooms or special reverberation test rooms
The requirements in 8.1.2 of EN ISO 3741:2010, 7.3 of EN ISO 3743-1:2010 and EN ISO 3743-2:2009
shall be followed.
The microphones shall be equipped with proper wind shields.
5.4 Background noise
The background noise shall be measured with the test subject installed but not operating. Auxiliary
devices necessary for the operation of the test installation shall be in operation during the
measurement of background noise.
If the background noise is unsteady, the background noise shall be measured immediately before and
after testing the apparatus. The average value shall be used.
5.5 Calculation of sound power
The sound power level shall be determined according to the standard, which was used to perform the
noise measurement.
In case of using the partial measurement surfaces, a method of calculating the sound power level from
partial measurement surfaces is described in Annex A of this standard.
The A-weighted overall sound power level L shall be calculated from the values in the ⅓-octave
WA
frequency band or octave frequency band.
6 Emission sound pressure level determination
In this document, the emission sound pressure level L is determined in accordance with
pA
EN ISO 11203. No additional measurements are necessary for the determination. As defined by
EN ISO 1
...