BS EN 1117-1999 Heat exchangers Liquid-cooled refrigerant condensers Test methods for establishing the performance《热交换器 液体冷却制冷的冷凝器 性能评定的试验方法》.pdf

《BS EN 1117-1999 Heat exchangers Liquid-cooled refrigerant condensers Test methods for establishing the performance《热交换器 液体冷却制冷的冷凝器 性能评定的试验方法》.pdf》由会员分享，可在线阅读，更多相关《BS EN 1117-1999 Heat exchangers Liquid-cooled refrigerant condensers Test methods for establishing the performance《热交换器 液体冷却制冷的冷凝器 性能评定的试验方法》.pdf（18页珍藏版）》请在麦多课文档分享上搜索。

1、BRITISH STANDARD BS EN 1117:1999 Incorporating Amendment No. 1 Heat exchangers Liquid-cooled refrigerant condensers Test methods for establishing the performance The European Standard EN 1117:1998, with the incorporation of amendment A1:2002, has the status of a British Standard ICS 27.060.30; 27.20

2、0 BS EN 1117:1999 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 February 1999 BSI 17 April 2003 ISBN 0 580 30548 1 National foreword This British Standard i

3、s the official English language version of EN 1117:1998, including amendment A1:2002. It supersedes DD ENV 1117:1994 which is withdrawn.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

4、amendment. For example, 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 se

5、cretary. Cross-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 Cat

6、alogue or of British 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

7、 the text; present 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

8、 inside front cover, the EN title page, pages 2 to 15, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 14281 17 April 2003 See national forewordEUROPEAN ST

9、ANDARD NORME EUROPENNE EUROPISCHE NORM EN 1117 September 1998 + A1 October 2002 ICS 27.060.30; 27.200 Descriptors: heat exchangers, condensers, liquefiers, water, definitions, classifications, calorific power, tests, measurements, characteristics, installation, computation English version Heat excha

10、ngers Liquid-cooled refrigerant condensers Test procedures for establishing the performance (includes amendment A1:2002) Echangeurs thermiques Condenseurs eau Procdures dessai pour la dtermination des performances (inclut lamendement A1:2002) Wrmeasustauscher Flssigkeitsgekhlte Kltemittelverflssiger

11、 Prfverfahren zur Leistungsfeststellung (enthlt nderung A1:2002) This European Standard was approved by CEN on 3 September 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

12、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 Central Secretariat or to any CEN member. This European Standard exists in three official versions

13、 (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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czec

14、h Republic, Denmark, Finland, France, Germany, 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

15、de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1117:1998 + A1:2002 EEN 1117:1998 BSI 17 April 2003 2 Foreword This European Standard has been prepared by Technical Committee CEN/TC 110, Heat ex

16、changers, the Secretariat of which is held by BSI. This European Standard supersedes ENV 1117:1993. The document was implemented previously as ENV 1117 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 a

17、n identical text or by endorsement, at the latest by March 1999, and conflicting national standards shall be withdrawn at the latest by March 1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European

18、Standard: Austria, Belgium, Czech Republic, Denmark, 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 1117:1998/A1:2002) has been prepared by Technical C

19、ommittee CEN/TC 110, Heat exchanges, the Secretariat 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 t

20、he latest by April 2003. This amendment is introduced 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,

21、 Belgium, Czech Republic, Denmark, Finland, France, 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

22、l s 6 5 Standard capacity 7 6 Manufacturers data 7 7M e a s u r e m e n t s 8 8 Testing methods and equipment 9 9 Test procedures 11 10 Capacity calculations 12 11 Conversion to standard conditions 12 12 Test report 13 Annex A (normative) Circuit diagram 14 Annex B (informative) Oil content measurem

23、ent procedure 14 Annex C (informative) Bibliography 15EN 1117:1998 BSI 17 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-cooled refrigerant condensers which o

24、perate with a (primary) refrigerant. 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

25、 of series-produced liquid refrigerant condensers: a) shell and tube type; b) co-axial type with: 1) refrigerant in annulus; 2) refrigerant in the tube(s); c) plate type. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. The

26、se 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 incorporated in it by amendment or revision. For undat

27、ed 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-cooled refrigerant condenser self-contained refrigeration system

28、 component transferring heat from a condensing refrigerant to a cooling liquid In the following the term “condenser” is used. 3.2 shell and tube type condenser consisting of a shell with a tube arrangement inside the shell 3.3 co-axial type condenser consisting of an outer tube with one or more inne

29、r tubes, all arranged parallel to each other The two fluids may flow either parallel or counter to each other. 3.4 plate type condenser consisting of parallel plates separating the two fluids EN 1117:1998 4 BSI 17 April 2003 3.5 Working fluids 3.5.1 refrigerant (primary) working fluid in a refrigera

30、tion 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 refrigeration system and remaining in liquid phase during the absorption or rejection of heat 3.6 Capacity 3.6.1 capacity (refri

31、gerant side) product of the refrigerant mass flow rate and the difference between the specific enthalpies of the refrigerant vapour at the inlet connection and the subcooled refrigerant at the outlet connection 3.6.2 capacity (liquid side) product of the liquid mass flow rate and the difference betw

32、een the specific enthalpies at the inlet and outlet connections 3.7 condensing pressure pressure at the refrigerant at the inlet connection of the condenser NOTE All pressures are average values ascertained over the test duration, and are absolute pressures. 3.8 Temperature NOTE All temperatures are

33、 average values ascertained over the measuring period. 3.8.1 liquid inlet temperature temperature of the liquid at the inlet connection, taking into consideration the local liquid velocities 3.8.2 liquid outlet temperature temperature of the liquid at the outlet connection, taking into consideration

34、 the local liquid velocities 3.8.3 ambient air temperature temperature of the air surrounding the condenser 3.8.4 refrigerant temperature 3.8.4.1 condensing temperature dew point temperature of the refrigerant corresponding to the condensing pressure 3.8.4.2 superheated vapour temperature temperatur

35、e of the refrigerant vapour at the inlet connection 3.8.4.3 subcooled refrigerant temperature temperature of the liquified refrigerant at the outlet connection EN 1117:1998 BSI 17 April 2003 5 3.8.4.4 bubble point temperature temperature corresponding to the absolute pressure of the refrigerant at t

36、he outlet connection of the condenser 3.9 Liquid pressure NOTE All pressures are average values ascertained over the measuring period. 3.9.1 liquid inlet pressure average static pressure of the liquid at the inlet connection of the condenser 3.9.2 liquid outlet pressure average static pressure of th

37、e liquid at the outlet connection of the condenser 3.10 Temperature difference 3.10.1 inlet temperature difference difference between the condensing temperature and the liquid inlet temperature 3.10.2 superheating difference between the superheated vapour temperature and the condensing temperature 3

38、.10.3 subcooling difference between the bubble point temperature and the subcooled refrigerant temperature 3.10.4 liquid temperature difference difference between the liquid outlet and inlet temperature 3.11 high glide refrigerant where the difference between the condensing and bubble point temperat

39、ures at a condensing temperature of 40 C is greater than 3 K 3.12 fouling resistance thermal resistance of a layer of unwanted deposit on the heat exchanger surface reducing its heat transfer performance NOTE The fouling resistance for a clean surface is zero. Clean, in this context, means that all

40、production residues have been removed from the heat transfer surface by the factorys cleaning process. 3.13 oil content proportion of oil by mass in the pure refrigerant circulating in the heat exchanger EN 1117:1998 6 BSI 17 April 2003 4 Symbols For the purposes of this European Standard the follow

41、ing apply: 4.1 Letters 4.2 Subscripts 4.3 Superscripts c pL specific heat capacity of the liquid kJ/(kg K) h L1 specific enthalpy of the liquid at the inlet connection kJ/kg h L2specific enthalpy of the liquid at the outlet connection kJ/kg h R1specific enthalpy of refrigerant vapour at the inlet co

42、nnection kJ/kg h R2specific enthalpy of subcooled refrigerant at the outlet connection kJ/kg P Rcapacity (refrigerant side) kW P Lcapacity (liquid side/primary method) kW p atmatmospheric pressure hPa p c condensing pressure bar p R2 refrigerant pressure at the condenser outlet bar p L1liquid pressu

43、re at the inlet connection bar p L2liquid pressure at the outlet connection bar q Rrefrigerant flow rate q Lliquid flow rate t ambambient air temperature C t L1liquid inlet temperature C t L2liquid outlet temperature C t sup superheated vapour temperature C t sub supercooled refrigerant temperature

44、C t (PR2) saturation temperature corresponding to P R2 C t c condensing temperature C t RM refrigerant temperature at the flow measuring point C t 1 inlet temperature difference = t c t L1K t L liquid temperature difference = t L2 t L1K t sup superheating = t sup t cK t sub subcooling = t( pR2 ) t s

45、ubK t 1 (st) standard inlet temperature difference K p Lpressure drop on the liquid side = p L1 p L2Pa Z test duration s rd relative deviation % m mass v volume numbers positions defined on the circuit diagram (a,b) test number referring to the test sequence (st) standard EN 1117:1998 BSI 17 April 2

46、003 7 5 Standard capacity 5.1 Basis for standard capacity data The capacity of a condenser depends on: a) the condensing temperature; b) the temperature difference between the liquid and the refrigerant; c) the mass flows of liquid and refrigerant; d) the oil content; e) the state of subcooling at t

47、he condenser outlet connection; f) the state of superheating at the condenser inlet connection; g) the type of refrigerant; h) the fouling conditions. Therefore the capacity of the condenser shall be specified for specific operating conditions. 5.2 Standard capacity conditions The standard capacity

48、shall be based on tests performed on a clean condenser under the conditions in Table 1. Table 1 Standard capacity conditions The quality of the liquid shall be such that it does not cause measurable fouling during the entire operation for establishing the test. t supshall be the value that results w

49、hen the refrigerant is subjected to isentropic compression from 10 C evaporating and +10 C vapour to +40 C condensing temperatures. t sup for common refrigerants shall be determined according to: 6 Manufacturers data To identify the liquid-cooled condenser and allow its traceability the manufacturer or supplier shall supply to the test hou