DIN EN 327-2014 Heat exchangers - Forced convection air cooled refrigerant condensers - Test procedures for establishing performance German version EN 327 2014《热交换器 强制对流空气冷却制冷剂凝结器 .pdf

1、November 2014 Translation by DIN-Sprachendienst.English price group 15No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).I

2、CS 27.060.30!%=O%“2264402www.din.deDDIN EN 327Heat exchangers Forced convection air cooled refrigerant condensers Test procedures for establishing performance;English version EN 327:2014,English translation of DIN EN 327:2014-11Wrmebertrager Ventilatorbelftete Verflssiger Prfverfahren zur Leistungsf

3、eststellung;Englische Fassung EN 327:2014,Englische bersetzung von DIN EN 327:2014-11Echangeurs thermiques Arocondenseurs convection force Procdure dessai pour la dtermination de la performance;Version anglaise EN 327:2014,Traduction anglaise de DIN EN 327:2014-11SupersedesDIN EN 327:2003-04www.beut

4、h.deDocument comprises 37 pagesIn case of doubt, the German-language original shall be considered authoritative.10.14 DIN EN 327:2014-11 2 A comma is used as the decimal marker. National foreword This document (EN 327:2014) has been prepared by Technical Committee CEN/TC 110 “Heat exchangers” (Secre

5、tariat: DIN, Germany). The responsible German body involved in its preparation was the DIN-Normenausschuss Kltetechnik (DIN Standards Committee Refrigeration Technology), Working Committee NA 044-00-11 AA Klte-Apparate. Amendments This standard differs from DIN EN 327:2003-04 as follows: a) Clause 3

6、 “Terms and definitions” has been revised; b) requirements for refrigerant “CO2” have been taken into account. Previous editions DIN 8970: 1981-03 DIN V ENV 327: 1991-06 DIN EN 327: 2000-11, 2003-04 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 327 August 2014 ICS 27.060.30 Supersedes EN 327:

7、2000English Version Heat exchangers - Forced convection air cooled refrigerant condensers - Test procedures for establishing performance Echangeurs thermiques - Arocondenseurs convection force - Procdures dessai pour la dtermination de la performance Wrmebertrager - Ventilatorbelftete Verflssiger -

8、Prfverfahren zur Leistungsfeststellung This European Standard was approved by CEN on 22 May 2014. 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

9、-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 translat

10、ion 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,

11、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 CO

12、MIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR 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 worldwide for CEN national Members. Ref. No. EN 327:2014 E2 Contents Page Foreword 4 1 Scope 6 2 Norm

13、ative references 6 3 Terms and definitions .6 4 Symbols 9 5 Standard capacity . 11 5.1 Basis for standard capacity data 11 5.2 Standard capacity conditions 11 5.3 Conditions for the nominal air flow rate . 12 5.4 Conditions for nominal fan power 12 6 Manufacturers data 12 7 Measurements . 13 7.1 Unc

14、ertainty of measurements . 13 7.2 Measurement criteria 14 7.2.1 Pipe side temperature measurement 14 7.2.2 Condenser and gas cooler inlet temperature 15 7.2.3 Subcooled refrigerant temperature. 15 7.2.4 Water temperatures (Balancing air cooler - Air side calorimeter) . 15 7.2.5 Gas cooler outlet tem

15、perature . 15 7.2.6 Air temperatures . 15 7.2.7 Pressure measuring points . 16 7.2.8 Refrigerant flow rate . 16 7.2.9 Water flow rate 16 7.2.10 Oil content . 16 7.2.11 Non-azeotropic refrigerant . 16 8 Testing methods and equipment 16 8.1 Testing methods for capacity 16 8.1.1 General . 16 8.1.2 High

16、 pressure calorimeter (primary method) 17 8.1.3 Low pressure calorimeter (primary method) . 17 8.1.4 Air side calorimeter (primary method) . 17 8.1.5 Refrigerant flow method (confirming method) 18 8.1.6 Air flow method . 18 8.2 Air flow measurement 18 8.3 Equipment for capacity measurement . 18 8.3.

17、1 General . 18 8.3.2 High pressure calorimeter . 19 8.3.3 Low pressure calorimeter 20 8.3.4 Air side calorimeter 20 8.3.5 Refrigerant flow method 21 8.3.6 Liquid receiver 21 9 Test procedures 21 9.1 General . 21 9.2 Heat loss measurement - calibration 22 9.2.1 General . 22 9.2.2 High pressure calori

18、meter - direct heat inducement into refrigerant 22 9.2.3 Low and high pressure calorimeters - heat inducement into secondary fluid 23 DIN EN 327:2014-11 EN 327:2014 (E) 3 9.2.4 Air calorimeter room . 23 9.3 Capacity measurement . 23 9.3.1 Steady-state . 23 9.3.2 Test duration 24 9.3.3 Conducting the

19、 test . 25 9.3.4 Data to be recorded . 25 9.4 Measuring the fan performance . 26 10 Capacity calculation 26 10.1 General . 26 10.2 Heat loss factor: calibration test 26 10.2.1 High pressure calorimeter - direct heat inducement into the refrigerant 26 10.2.2 High and low pressure calorimeter - indire

20、ct heat inducement into the refrigerant 26 10.2.3 Air side calorimeter . 27 10.3 Capacity measurement test 27 10.3.1 High and low pressure calorimeter - flow rate measurement methods . 27 10.3.2 High pressure calorimeter method - direct capacity measurement . 27 10.3.3 Air side calorimeter . 27 10.3

21、.4 Confirming method . 28 11 Conversion to Standard Conditions 28 11.1 General . 28 11.1.1 Introduction 28 11.1.2 Correction for atmospheric pressure 28 11.1.3 Standard capacity 28 11.2 Nominal air flow . 28 11.3 Nominal fan power 28 12 Test report 29 Annex A (normative) Flow meter method . 30 Annex

22、 B (informative) Low pressure calorimeter . 32 Annex C (informative) Air-Side calorimeter . 33 Annex D (informative) Procedure to measure the oil content . 34 Bibliography 35 DIN EN 327:2014-11 EN 327:2014 (E) 4 Foreword This document (EN 327:2014) has been prepared by Technical Committee CEN/TC 110

23、 “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 2015, and conflicting national standards shall be withdrawn at the latest by F

24、ebruary 2015. 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 327:2000 and EN 327:2000/A1:2002. The main c

25、hanges with respect to the previous edition are listed below: a) Clause 3 “Terms and definitions” is modified; b) The revised standard takes into account the application of CO2. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bou

26、nd 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, Portuga

27、l, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 327:2014-11 EN 327:2014 (E) 5 Introduction This European Standard is one of a series of European Standards dedicated to heat exchangers. DIN EN 327:2014-11 EN 327:2014 (E) 6 1 Scope This European Standa

28、rd applies to non-ducted forced convection air cooled refrigerant condensers/gas coolers with dry air side surface within which the refrigerant changes phases or is cooled. Its purpose is to establish uniform methods of performance assessment. It does not deal with evaluation of conformity. This Eur

29、opean Standard does not apply to air cooled condensers/gas coolers, designed primarily for installation within the machinery compartment of packaged products or in factory-assembled condensing/gas cooling units. This European Standard does not apply to condensers with an integral subcooling part. Th

30、is European Standard specifies methods to test and ascertain the following: product identification; standard capacity; nominal air flow rate; nominal fan power. This European Standard does not cover technical safety aspects. 2 Normative references The following documents, in whole or in part, are no

31、rmatively 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 60034-1, Rotating electrical machines - Part 1: Rating a

32、nd performance (IEC 60034-1) EN ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories (ISO/IEC 17025) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 forced convection air cooled refrigerant condenser

33、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: The heat transfer coil includes distributing and collecting headers. Note 2 to entry: In the

34、 following “forced convection air cooled refrigerant condenser” is referred to as “condenser”. 3.2 forced convection air cooled refrigerant gas cooler refrigeration system component that cools the refrigerant by rejecting heat to air, which is mechanically circulated over its dry heat transfer surfa

35、ce by integral fans and fan drives Note 1 to entry: In the following “forced convection air cooled refrigerant gas cooler” is referred to as “gas cooler”. DIN EN 327:2014-11 EN 327:2014 (E) 7 3.3 refrigerant working fluid used for heat transfer in a cooling system, which absorbs heat at a low temper

36、ature and a low pressure and rejects heat at a higher temperature and a higher pressure usually involving changes of the state of the fluid 3.4 capacity total heat flow rejected by the refrigerant. This total heat flow of rejection is equal to the product of the mass flow rate of the refrigerant and

37、 the difference between the enthalpies of the refrigerant at the condenser/gas cooler inlet and outlet connections 3.5 pressures 3.5.1 condensing/gas cooling pressure pressure of the refrigerant at the inlet connection of the condenser/gas cooler 3.5.2 evaporating pressure pressure of the refrigeran

38、t at the outlet connection of the calorimeter (applicable only to low pressure calorimeter method) 3.5.3 calorimeter pressure pressure in the secondary fluid side of the calorimeter vessel (applicable only to low pressure calorimeter method and high pressure calorimeter with indirect heat inducement

39、) Note 1 to entry: All pressures are average values ascertained over the test duration, and are absolute pressures. 3.6 temperatures Note 1 to entry: All air temperatures are dry bulb temperatures. 3.6.1 air inlet temperature average dry bulb temperature of the air at the inlet of the condenser/gas

40、cooler taking into consideration the local air velocities 3.6.2 ambient air temperature average temperature of the air surrounding the calorimeter, responsible for the heat exchange with the ambient 3.6.3 inside air temperature average temperature of the air inside the calorimeter, responsible for t

41、he heat exchange with the ambient 3.6.4 refrigerant temperatures 3.6.4.1 dew point temperature temperature of the refrigerant corresponding to the condensing pressure 3.6.4.2 condenser/gas cooler inlet temperature temperature of the refrigerant vapour at the inlet connection of the condenser/gas coo

42、ler DIN EN 327:2014-11 EN 327:2014 (E) 8 3.6.4.3 subcooled refrigerant temperature temperature of the liquid refrigerant in the receiver 3.6.4.4 gas cooler outlet temperature temperature of the refrigerant gas at the outlet connection of the gas cooler 3.6.4.5 evaporating temperature dew point tempe

43、rature of the refrigerant corresponding to the evaporating pressure (applicable only to low pressure calorimeter method) 3.6.4.6 vapour temperature temperature of the refrigerant at the calorimeter outlet connection 3.6.4.7 bubble point temperature at condenser outlet temperature corresponding to th

44、e absolute pressure of the refrigerant at the outlet connection of the condenser 3.6.5 water temperatures (applicable only to air side calorimeter method) 3.6.5.1 water inlet temperature temperature of the water as it enters the calorimeter 3.6.5.2 water outlet temperature temperature of the water a

45、s it leaves the calorimeter Note 1 to entry: All temperatures are average values ascertained over the test duration. 3.7 temperature differences 3.7.1 condenser inlet temperature difference difference between the condensing temperature and the air inlet temperature 3.7.2 gas cooler inlet temperature

46、 difference difference between the gas cooler inlet temperature and the air inlet temperature 3.7.3 superheating difference between the condenser inlet temperature and the condensing temperature 3.7.4 subcooling difference between the bubble point temperature and the subcooled refrigerant temperatur

47、e 3.8 high glide refrigerant where the difference between the condensing and bubble point temperatures at a condensing temperature of 40 C is greater than 3 K DIN EN 327:2014-11 EN 327:2014 (E) 9 3.9 fan power electrical power, absorbed by the fan motor(s) measured at the electrical terminals of the

48、 motor(s) 3.10 nominal fan power fan power measured during the air flow test and corrected to the nominal atmospheric pressure of 1 013,25 hPa Note 1 to entry: The fan power will also differ with the temperature at which the fan runs. As the fan power is only a small proportion of the total cooling load, the deviations are considered to be negligible. 3.11 rotational speed of the fans average rotational speed of the fans 3.12 nominal air flow air volume flow rate, flowing through the condenser/gas cooler 3.13 internal v