1、BSI Standards PublicationBS EN 327:2014Heat exchangers Forcedconvection air cooledrefrigerant condensers Testprocedures for establishingperformanceBS EN 327:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 327:2014. Itsupersedes BS EN 327:2000 which is withd
2、rawn.The UK participation in its preparation was entrusted to TechnicalCommittee RHE/30, Heat exchangers.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are
3、responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 80317 8ICS 27.060.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStand
4、ards Policy and Strategy Committee on 31 August 2014.Amendments issued since publicationDate Text affectedBS EN 327:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 327 August 2014 ICS 27.060.30 Supersedes EN 327:2000English Version Heat exchangers - Forced convection air cooled refrigerant
5、condensers - Test procedures for establishing performance Echangeurs thermiques - Arocondenseurs convection force - Procdures dessai pour la dtermination de la performance Wrmebertrager - Ventilatorbelftete Verflssiger - Prfverfahren zur Leistungsfeststellung This European Standard was approved by C
6、EN 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-date lists and bibliographical references concerning such national standards m
7、ay 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
8、 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, Icelan
9、d, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Managem
10、ent 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 EBS EN 327:2014EN 327:2014 (E) 2 Contents Page Foreword 4 1 Scope 6 2 Normative references 6 3 Terms and definitions .6 4 S
11、ymbols 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 Uncertainty of measurements . 13 7.2 Measurement cri
12、teria 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 temperature . 15 7.2.6 Air temperatures . 15 7.2.7 P
13、ressure 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 pressure calorimeter (primary method) 17 8.1.3 L
14、ow 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 8.3.1 General . 18 8.3.2 High pressure calorimeter .
15、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 calorimeter - direct heat inducement into refrigerant 2
16、2 9.2.3 Low and high pressure calorimeters - heat inducement into secondary fluid 23 BS EN 327:2014EN 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 test . 25 9.3.4 Data to be recorded . 25 9.4 Measurin
17、g 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 - indirect heat inducement into the refrigerant 26 10.2.3 Air
18、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 10.3.4 Confirming method . 28 11 Conversion to Standard Co
19、nditions 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 B (informative) Low pressure calorimeter . 32 Annex C
20、 (informative) Air-Side calorimeter . 33 Annex D (informative) Procedure to measure the oil content . 34 Bibliography 35 BS EN 327:2014EN 327:2014 (E) 4 Foreword This document (EN 327:2014) has been prepared by Technical Committee CEN/TC 110 “Heat exchangers”, the secretariat of which is held by DIN
21、. 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 February 2015. Attention is drawn to the possibility that so
22、me 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 changes with respect to the previous edition are listed belo
23、w: 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 bound to implement this European Standard: Austria, Belgium, B
24、ulgaria, 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,
25、 Turkey and the United Kingdom. BS EN 327:2014EN 327:2014 (E) 5 Introduction This European Standard is one of a series of European Standards dedicated to heat exchangers. BS EN 327:2014EN 327:2014 (E) 6 1 Scope This European Standard applies to non-ducted forced convection air cooled refrigerant con
26、densers/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 European Standard does not apply to air cooled condensers/gas coolers, d
27、esigned 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. This European Standard specifies methods to test and ascertain the foll
28、owing: 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 normatively referenced in this document and are indispensable for its a
29、pplication. 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 and performance (IEC 60034-1) EN ISO/IEC 17025, General requirements f
30、or 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 refrigeration system component that condenses refrigerant vapour by r
31、ejecting 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 following “forced convection air cooled refrigerant condenser” is re
32、ferred 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 surface by integral fans and fan drives Note 1 to entry: In the following
33、“forced convection air cooled refrigerant gas cooler” is referred to as “gas cooler”. BS EN 327:2014EN 327:2014 (E) 7 3.3 refrigerant working fluid used for heat transfer in a cooling system, which absorbs heat at a low temperature and a low pressure and rejects heat at a higher temperature and a hi
34、gher 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 the difference between the enthalpies of the refrigerant at the condenser
35、/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 refrigerant at the outlet connection of the calorimeter (applicable only to low pres
36、sure 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) Note 1 to entry: All pressures are average values ascertained over the t
37、est 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 cooler taking into consideration the local air velocities 3.6.2 ambient ai
38、r 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 the heat exchange with the ambient 3.6.4 refrigerant temperatures 3.6.4.1 d
39、ew 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 cooler BS EN 327:2014EN 327:2014 (E) 8 3.6.4.3 subcooled refrigerant temperat
40、ure 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 temperature of the refrigerant corresponding to the evaporating pressure (applicable
41、 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 the absolute pressure of the refrigerant at the outlet connection of the condense
42、r 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 as it leaves the calorimeter Note 1 to entry: All temperatures are average value
43、s 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 difference difference between the gas cooler inlet temperature and the air inl
44、et 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 temperature 3.8 high glide refrigerant where the difference between the condensing and bu
45、bble point temperatures at a condensing temperature of 40 C is greater than 3 K BS EN 327:2014EN 327:2014 (E) 9 3.9 fan power electrical power, absorbed by the fan motor(s) measured at the electrical terminals of the motor(s) 3.10 nominal fan power fan power measured during the air flow test and cor
46、rected 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 f
47、ans average rotational speed of the fans 3.12 nominal air flow air volume flow rate, flowing through the condenser/gas cooler 3.13 internal volume volume of the refrigerant containing parts of the condenser/gas cooler between its two connections 3.14 fouling resistance thermal resistance due to unwa
48、nted deposit on the heat exchanger surface reducing its heat transfer performance Note 1 to entry: The fouling resistance for a clean surface is zero. Note 2 to entry: Clean, in this context, means that all production residues have been removed from the heat transfer surface and the fan(s) by the fa
49、ctorys cleaning process. 3.15 oil content the proportion of oil by mass in the pure refrigerant circulating in the heat exchanger 4 Symbols For the purposes of this document, the symbols of Table 1 apply: BS EN 327:2014EN 327:2014 (E) 10 Table 1 Symbols E energy supply to the calorimeter (refrigerant side calorimeters) kWh HLF heat loss factor from calorimeter kW/K hsupspec. enthalpy of superheated vapour at condenser inlet connection kJ/kg hsubspec. enthalpy of subcooled liquid refrigerant at condenser outlet connection kJ/kg hR1specific enthalpy of the
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