CEN TS 17153-2018 Ventilation for buildings - Correction of air flow rate according to ambient conditions.pdf

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1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Ventilation for buildings - Correction of air flow rate according to ambient conditionsPD CEN/TS 17153:2018TECHNICAL SPECIFICATION SPCIFICATION TECHNIQUE TECHNISCHE SPEZIFIKATION CEN/TS 17153 August 2018 ICS 91.140.30 E

2、nglish Version Ventilation for buildings - Correction of air flow rate according to ambient conditions Ventilation des btiments - Correction du dbit dair en fonction des conditions ambiantes Lftung von Gebuden - Korrektur des Luftstroms entsprechend der Umgebungsbedingungen This Technical Specificat

3、ion (CEN/TS) was approved by CEN on 6 December 2017 for provisional application. The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their comments, particularly on the question whether the CEN/TS can be converted

4、into a European Standard. CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the CEN/TS) u

5、ntil the final decision about the possible conversion of the CEN/TS into an EN is reached. 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,

6、 Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-

7、CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. CEN/TS 17153:2018 ENational forewordThis Published Document is the UK implementation of CEN/TS 17153:2018. The UK pa

8、rticipation in its preparation was entrusted to Technical Committee RHE/2, Ventilation for buildings, heating and hot water services.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provis

9、ions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 97890 6ICS 91.140.30Compliance with a British Standard cannot confer immunity from legal obligations. This Published Document was publis

10、hed under the authority of the Standards Policy and Strategy Committee on 30 September 2018.Amendments/corrigenda issued since publicationDate Text affectedPUBLISHED DOCUMENTPD CEN/TS 17153:2018TECHNICAL SPECIFICATION SPCIFICATION TECHNIQUE TECHNISCHE SPEZIFIKATION CEN/TS 17153 August 2018 ICS 91.14

11、0.30 English Version Ventilation for buildings - Correction of air flow rate according to ambient conditions Ventilation des btiments - Correction du dbit dair en fonction des conditions ambiantes Lftung von Gebuden - Korrektur des Luftstroms entsprechend der Umgebungsbedingungen This Technical Spec

12、ification (CEN/TS) was approved by CEN on 6 December 2017 for provisional application. The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their comments, particularly on the question whether the CEN/TS can be conv

13、erted into a European Standard. CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the CEN

14、/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached. 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, Hu

15、ngary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUN

16、G CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. CEN/TS 17153:2018 EPD CEN/TS 17153:2018CEN/TS 17153:2018 (E) 2 Contents Page European foreword . 3 Introductio

17、n 4 1 Scope 5 2 Normative references 5 3 Terms and definitions . 5 4 Symbols, abbreviations and subscripts 6 5 Correction of air flow rate 6 Bibliography 9 PD CEN/TS 17153:2018CEN/TS 17153:2018 (E) 3 European foreword This document (CEN/TS 17153:2018) has been prepared by Technical Committee CEN/TC

18、156 “Ventilation for buildings”, the secretariat of which is held by BSI. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELE

19、C Internal Regulations, the national standards organizations of the following countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary,

20、 Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. PD CEN/TS 17153:2018CEN/TS 17153:2018 (E) 4 Introduction The formula to correct the air flow rate dep

21、ending on ambient conditions that is stated in some standards published by CEN/TC 156 is not correct. This document gives a correct formula and the way it has been obtained. CEN/TC 156 working groups are invited to use the content of this document in their standards. Those working groups can use the

22、 correct formula only or more depending on the level of explanation needed for the understanding of their standards. PD CEN/TS 17153:2018CEN/TS 17153:2018 (E) 5 1 Scope This document gives guidelines to correct the measured air flow rate when measuring conditions are different from standard conditio

23、ns. It applies to a power-law formula giving the air flow rate as a function of a pressure difference with an air flow rate coefficient, C, varying with temperature and pressure. This document applies to: passive elements of air distribution systems with a cross-section area that does not depend on

24、pressure; volume flow rate (and not mass flow rate). This document is applicable to (but not limited to): EN 1507, Ventilation for buildings Sheet metal air ducts with rectangular section Requirements for strength and leakage; EN 1751, Ventilation for buildings Air terminal devices Aerodynamic testi

25、ng of damper and valves; EN 12237, Ventilation for buildings Ductwork Strength and leakage of circular sheet metal ducts; EN 13141-1, Ventilation for buildings Performance testing of components/products for residential ventilation Part 1: Externally and internally mounted air transfer devices; EN 13

26、141-2, Ventilation for buildings Performance testing of components/products for residential ventilation Part 2: Exhaust and supply air terminal devices; EN 13141-9, Ventilation for buildings Performance testing of components/products for residential ventilation Part 9: externally mounted humidity co

27、ntrolled air transfer device; EN 13141-10, Ventilation for buildings Performance testing of components/products for residential ventilation Part 10: humidity controlled extract air terminal device; EN 15727, Ventilation for buildings Ducts and ductwork components, leakage classification and testing.

28、 This document does not apply to: fans; air terminal devices with automatically controlled openings (variable openings). 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, o

29、nly the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 12792, Ventilation for buildings - Symbols, terminology and graphical symbols 3 Terms and definitions For the purposes of this document, the terms and definitio

30、ns given in EN 12792 apply. PD CEN/TS 17153:2018CEN/TS 17153:2018 (E) 6 4 Symbols, abbreviations and subscripts For the purposes of this document, the symbols, abbreviations and subscripts given in EN 12792 and those listed in Table 1 apply. Table 1 Symbols, abbreviations and subscripts Symbol Desig

31、nation Unit C air flow rate coefficient m3/(sPan) p relative pressure Pa dynamic viscosity kg/(ms) n flow exponent paatmospheric pressure Pa vq air flow rate m3/s air density kg/m3T air temperature K Subscript Designation Unit meas related to air flowing through the measurement device test related t

32、o air flowing through the product under test ref related to reference conditions 5 Correction of air flow rate The correction of air flow rate should be applied when the measurement is made in volume flow rate. In case the measurement is done in mass flow rate, the measured mass flow rate should be

33、converted in volume flow rate before applying the correction. Considering the document in reference 5, the air flow rate in an air distribution system can be written following Formula (1) with symbols of Table 1. = vnq Cp (1) Considering reference 5: 121is proportional tonnC (2) Figure 1 gives the a

34、rrangement for leakage measurement in technical ductwork products. PD CEN/TS 17153:2018CEN/TS 17153:2018 (E) 7 Key 1 product under test (with Ttest and ptest relating to the temperature and pressure conditions of the air flowing through the product under test (1) 2 manometer 3 air flow meter (with T

35、meas and pmeas relating to the temperature and pressure conditions of the air flowing through the air flow meter (3) 4 end caps Figure 1 Arrangement for leakage measurement in technical ductwork products Air flow rate coefficient, C, can be transposed from test conditions seen by the product under t

36、est to reference conditions using Formula (3). = 1 21test test refref ref testnnCC(3) The density varies with atmospheric pressure, pa, and temperature, T , as shown in Formula (4) using the ideal gas law. = a refrefarefpTpT(4) The dynamic viscosity, , only varies with temperature according to Formu

37、la (5). ( )= + 617,1 0,048 273,15 10()T (5) For a given relative pressure, p , Formula (6) gives the air flow rate correction. = refvref vtesttestCqqC(6) In addition, mass conservation leads to Formula (7) = measvtest vmeastestqq (7) By inserting Formula (7) in Formula (6), Formula (8) is obtained.

38、PD CEN/TS 17153:2018CEN/TS 17153:2018 (E) 8 =meas refvref vmeastest testCqqC(8) Therefore, by inserting Formula (3) in Formula (8), Formula (9) is obtained. = 21 1test test measvref vmeasref ref testnnqq (9) The air flow rate at reference conditions, vrefq , is determined from measured air flow rate

39、, vmeasq , using the following values in Formula (7): =3ref1,204 kg/m ( )=6ref18,06 10 kg m s/ ; and replacing: measand testby Formula (4) in which pref= 101 325 Pa andTref= 293,15 K;refand testby Formula (5). In Formula (9) the value of the flow exponent, n, may be assessed by measuring the pressur

40、e difference p for different flow rates vq and by fitting the log-log data to log-transformed Formula (1) by applying a linear regression. Alternatively, a default value of n can be used depending on the application: =n 0,65 in standards related to: air leakage in ductworks (EN 12237, EN 1507, EN 15

41、727); or air leakage of ventilation components; =n 0,5 in standards related to: dampers (EN 1751); or air transfer devices (EN 13141-1 and EN 13141-2) excluding for air leakage tests. If a default value is used, the error on the value of n can lead to significant errors on the correction applied in

42、Formula (7). PD CEN/TS 17153:2018CEN/TS 17153:2018 (E) 9 Bibliography 1 EN 1507, Ventilation for buildings - Sheet metal air ducts with rectangular section - Requirements for strength and leakage 2 EN 1751, Ventilation for buildings - Air terminal devices - Aerodynamic testing of damper and valves 3

43、 EN 12237, Ventilation for buildings - Ductwork - Strength and leakage of circular sheet metal ducts 4 EN 15727, Ventilation for buildings - Ducts and ductwork components, leakage classification and testing 5 Iain S. Walker, David J. Wilson and Max H. Sherman: A comparison of the power law to quadra

44、tic formulations for air infiltration calculations, Energy and Buildings, Vol. 27, No.3, June 1997 6 CARRI F.R. Temperature and pressure corrections for power-law coefficients of airflow through ventilation system components and leaks, Proc. 35th AIVC Conference, Poznan (Poland), September 2014 PD C

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