BS EN 1118-1999 Heat exchangers Refrigerant cooled liquid coolers Test methods for establishing the performance《热交换器 冷却液制冷器 性能确定的试验方法》.pdf

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1、BRITISH STANDARD BS EN 1118:1999 Incorporating Amendment No. 1 Heat exchangers Refrigerant cooled liquid coolers Test methods for establishing the performance The European Standard EN 1118:1998, with the incorporation of amendment A1:2002, has the status of a British Standard ICS 27.060.30; 27.200 B

2、S EN 1118:1999 This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 May 1999 BSI 8 April 2003 ISBN 0 580 30974 6 National foreword This British Standard is the Eng

3、lish language version of EN 1118:1999, including amendment A1:2002. It supersedes DD ENV 1118:1994 which is withdrawn. The start and finish of text introduced or altered by amendment is indicated in the text by tags !“. Tags indicating changes to CEN text carry the number of the CEN amendment. For e

4、xample, text altered by CEN amendment A1 is indicated by !“. The UK participation in its preparation was entrusted to Technical Committee RHE/30, Heat exchangers, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross

5、-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of B

6、ritish Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; pre

7、sent to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front

8、cover, the EN title page, pages 2 to 31 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 14282 8 April 2003 See national forewordEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE N

9、ORM EN 1118 December 1998 + A1 October 2002 ICS 27.060.30; 27.200 Descriptors: heat exchangers, coolers, liquids, definitions, classifications, calorific power, tests, measurements, characteristics, installations, computation English version Heat exchangers Refrigerant cooled liquid coolers Test pro

10、cedures for establishing the performance (includes amendment A1:2002) Echangeurs thermiques Refroidisseurs de liquides Procdures dessai pour la dtermination de la performances (inclut lamendement A1:2002) Wrmeaustauscher Kltemittelgekhlte Flssigkeitskhler Prfverfahren zur Leistungsfeststellung (enth

11、lt nderung A1:2002) This European Standard was approved by CEN on 27 November 1998. Amendment A1 was approved by CEN on 14 September 2002. 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 nation

12、al standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any

13、other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany

14、, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All

15、rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1118:1998 + A1:2002 EEN 1118:1998 BSI 8 April 2003 2 Foreword This European Standard has been prepared by Technical Committee CEN/TC 110, Heat exchangers, the Secretariat of which is held by

16、BSI. This European Standard replaces ENV 1118:1993. The document was implemented previously as ENV 1118 in 1993 and no technical changes have been made. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the lates

17、t by June 1999, and conflicting national standards shall be withdrawn at the latest by June 1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmar

18、k, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Foreword to amendment A1 This document (EN 1118:1998/A1:2002) has been prepared by Technical Committee CEN/TC 110, Heat exchangers, the Secretar

19、iat 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 2003, and conflicting national standards shall be withdrawn at the latest by April 2003. This amendment is introd

20、uced to accommodate newly available refrigerants such as R404A, R407C and R410A. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, Franc

21、e, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword 2 Introduction 3 1S c o p e 3 2 Normative references 3 3 Definitions 3 4S y m b o l s 7 5 Standard capacity 8 6 Manufacturers data

22、9 7M e a s u r e m e n t s 1 0 8 Testing methods and equipment 12 9 Test procedures 13 10 Capacity calculations 15 11 Conversion to standard conditions 16 12 Test report 17 Annex A (normative) Circuit diagrams 18 Annex B (normative) Direct expansion operation 22 Annex C (normative) Flooded operation

23、 21 Annex D (normative) Operation with liquid feed by gravity 25 Annex E (normative) Operation with liquid overfeed by pump circulation 27 Annex F (informative) Basic illustrations 27 Annex G (informative) Flow diagrams for conversion to standard conditions 28 Annex H (informative) Oil content measu

24、rement procedure 31 Annex I (informative) Bibliography 31EN 1118:1998 BSI 8 April 2003 3 Introduction This European Standard is one of a series of European Standards dedicated to heat exchangers. 1 Scope 1.1 This European Standard applies to series produced liquid coolers which operate with a (prima

25、ry) refrigerant and its purpose is to establish uniform methods to test and ascertain the following: product identification; capacity; liquid flow rate; liquid side pressure drop. This standard does not cover technical safety aspects. 1.2 This standard deals with the following types of series produc

26、ed liquid coolers for refrigeration: a) shell and tube type with: 1) refrigerant in the shell; 2) refrigerant in the tube(s); b) co-axial type with: 1) refrigerant in the annulus; 2) refrigerant in the tube(s); c) plate type. 2 Normative references This European Standard incorporates by dated or und

27、ated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when

28、 incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 45001, General criteria for the operation of testing laboratories. 3 Definitions For the purposes of this standard, the following definitions apply. 3.1 liquid cooler (r

29、efrigerant cooled) self-contained refrigeration system component transferring heat from a liquid to be cooled to an evaporating refrigerant. In Annex A the liquid cooler is limited by the system boundaries for calculation purposes 3.2 shell and tube type liquid cooler consisting of a shell with a tu

30、be arrangement inside the shell 3.3 co-axial type liquid cooler consisting of an outer tube with one or more inner tubes, all arranged parallel to each other the two fluids can flow either parallel or counter to each other 3.4 plate type liquid cooler consisting of parallel plates separating the two

31、 fluids EN 1118:1998 4 BSI 8 April 2003 3.5 working fluids 3.5.1 refrigerant (primary) working fluid in a refrigeration system, that absorbs heat by evaporation at a low temperature and rejects it by condensation at a higher temperature 3.5.2 liquid working fluid, circulated through the refrigeratio

32、n system and remaining in liquid phase during the absorption or rejection of heat 3.6 capacity 3.6.1 capacity (liquid side) the cooling effect on the liquid, passing through the liquid cooler. It is defined as the product of the liquid mass flow rate and the difference between the specific enthalpie

33、s at the outlet and inlet connections of the liquid cooler 3.6.2 capacity (refrigerant side) the heat flow removed by the refrigerant between the inlet and the outlet connections of the system. It is defined as the product of the refrigerant mass flow rate and the difference between the specific ent

34、halpies at the outlet and inlet connections of the liquid cooler 3.7 temperatures NOTE All temperatures are average values ascertained over the measuring period. 3.7.1 liquid inlet temperature the average temperature of the liquid at the inlet connection of the liquid cooler system taking into consi

35、deration the local liquid velocities (see system boundaries in Annex A) 3.7.2 liquid outlet temperature the average temperature of the liquid at the outlet connection of the liquid cooler system, taking into consideration the local liquid velocities (see system boundaries in Annex A) 3.7.3 ambient a

36、ir temperature temperature of the air surrounding the liquid cooler 3.7.4 evaporating temperature !dew point temperature of the refrigerant, corresponding to the evaporating pressure “ 3.7.5 vapour outlet temperature a) for direct expansion, flooded operation and liquid feed by gravity: the directly

37、 measured temperature of the refrigerant vapour at the suction outlet connection of the liquid cooler system (see system boundaries in Annex A) b) for liquid overfeed by pump circulation: the directly measured temperature of the refrigerant vapour at the suction outlet connection of the separator (s

38、ee Annex A) 3.7.6 subcooled refrigerant temperature temperature of the liquid refrigerant at the inlet of the expansion device (not part of the liquid cooler) EN 1118:1998 BSI 8 April 2003 5 !3.7.7 bubble point temperature temperature corresponding to the absolute pressure of the refrigerant at the

39、inlet connection of the expansion devices “ 3.8 temperature differences 3.8.1 inlet temperature difference difference between the liquid inlet temperature and the evaporating temperature 3.8.2 superheating difference between the vapour outlet temperature and the evaporating temperature 3.8.3 subcool

40、ing !difference between the bubble point temperature corresponding to the absolute pressure of the refrigerant at the inlet connection to the expansion device and the subcooled refrigerant temperature “ 3.8.4 liquid temperature difference difference between the liquid inlet and outlet temperatures !

41、3.8.5 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 “ 3.9 liquid pressure NOTE All pressures are average values ascertained over the measuring period. 3.9.1 liquid inlet pressure static pressur

42、e of the liquid at the inlet connection of the liquid cooler 3.9.2 liquid outlet pressure static pressure of the liquid at the outlet connection of the liquid cooler 3.10 operation 3.10.1 direct expansion operation evaporation process in which the primary refrigerant enters the liquid cooler via a d

43、irect expansion device as a liquid-vapour mixture and leaves it in superheated state (see system boundaries in Annex A) 3.10.2 flooded operation evaporation process in which the refrigerant flow is controlled by keeping the refrigerant liquid level in the liquid cooler constant (see system boundarie

44、s in Annex A) 3.10.3 operation with liquid feed by gravity evaporation process in which the refrigerant leaves the liquid cooler in partially evaporated state. The refrigerant is circulated by gravity and the difference in refrigerant density at the liquid cooler inlet and outlet. The process is acc

45、omplished in a system which consists of a liquid cooler, a low pressure separator and the connecting lines. The refrigerant flow is controlled by keeping the refrigerant liquid level in the separator constant (see system boundaries in Annex A) EN 1118:1998 6 BSI 8 April 2003 3.10.4 operation with li

46、quid overfeed by pump circulation evaporation process in which the refrigerant leaves the liquid cooler in partially evaporated state. The process is accomplished in a system which consists of a liquid cooler only, and is operated by a liquid pump and a separator which is a part of a refrigerating m

47、achine. The refrigerant is transported between the separator and the liquid cooler by a mechanical pump (see system boundaries in Annex A) 3.11 refrigerant enthalpies 3.11.1 refrigerant inlet specific enthalpy specific enthalpy of the refrigerant at the inlet connection of the liquid cooler system I

48、t is defined as the specific enthalpy of the saturated liquid refrigerant at the inlet of the expansion device corresponding to the subcooled refrigerant temperature. This also applies to liquid overfeed by pump circulation as there the refrigerant inlet enthalpy cannot be defined by temperature and

49、 pressure measurement (see Annex A) 3.11.2 refrigerant outlet specific enthalpy !specific enthalpy of the refrigerant at the outlet connection of the liquid cooler system. It is defined as the specific enthalpy of the refrigerant corresponding to the evaporating pressure and the vapour outlet temperature. This also applies to liquid overfeed by pump circulation as there the refrigerant outlet enthalpy cannot be defined by temperature and pressure measurement and