1、BSI Standards PublicationBS EN 12900:2013Refrigerant compressors Rating conditions,tolerances and presentation ofmanufacturers performancedataBS EN 12900:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 12900:2013. Itsupersedes BS EN 12900:2005 which is with
2、drawn.The UK participation in its preparation was entrusted to TechnicalCommittee RHE/4, Testing of refrigerant compressors.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 c
3、ontract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 77770 7ICS 23.140; 27.200Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under t
4、he authority of theStandards Policy and Strategy Committee on 31 August 2013.Amendments issued since publicationDate Text affectedBS EN 12900:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12900 July 2013 ICS 23.140; 27.200 Supersedes EN 12900:2005English Version Refrigerant compressors -
5、Rating conditions, tolerances and presentation of manufacturers performance data Compresseurs pour fluides frigorignes - Conditions de dtermination des caractristiques, tolrances et prsentation des performances par le fabricant Kltemittel-Verdichter - Nennbedingungen, Toleranzen und Darstellung von
6、Leistungsdaten des Herstellers This European Standard was approved by CEN on 8 June 2013. 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 li
7、sts 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 translation unde
8、r 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, Former Y
9、ugoslav 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 COMIT EURO
10、PEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12900:2013: EBS EN 12900:2013EN 12900:2013 (E) 2 Contents Page Foreword 3
11、 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Parameters for the presentation of performance data.6 5 Requirements .8 6 Performance data.8 6.1 General 8 6.2 Tabular or graphical form .9 6.3 Polynomial form .9 7 Standard reference points . 10 8 Tolerances . 12 9 Conversion methods
12、14 9.1 Suction gas superheat . 14 9.2 Compressor speed for open drive compressors 14 BS EN 12900:2013EN 12900:2013 (E) 3 Foreword This document (EN 12900:2013) has been prepared by Technical Committee CEN/TC 113 “Heat pumps and air conditioning units”, the secretariat of which is held by AENOR. This
13、 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 January 2014 and conflicting national standards shall be withdrawn at the latest by January 2014. Attention is drawn to the possibility that some of the
14、 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 12900:2005. The main changes with respect to the previous edition are listed below: a) Clause 3 “Terms and defin
15、itions” is modified; b) the revised standard takes into account the application of CO2; c) the requirements on part load conditions according to Mandate M/488 are considered. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound
16、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, Portugal,
17、Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 12900:2013EN 12900:2013 (E) 4 1 Scope This European Standard specifies the rating conditions, tolerances and the method of presenting manufacturers data for positive displacement refrigerant compressors. Th
18、ese include single stage compressors and single and two stage compressors using a means of fluid subcooling. This is required so that a comparison of different refrigerant compressors can be made. The data relate to the refrigerating capacity and power absorbed and include requirements for part-load
19、 operation where applicable. 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, only the edition cited applies. For undated references, the latest edition of the referenced
20、document (including any amendments) applies. EN 378-1:2008+A2:2012, Refrigerating systems and heat pumps Safety and environmental requirements Part 1: Basic requirements, definitions, classification and selection criteria EN 13771-1, Compressors and condensing units for refrigeration Performance tes
21、ting and test methods Part 1: Refrigerant compressors ISO 817, Refrigerants Designation system 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 378-1:2008+A2:2012 and the following apply. 3.1 positive displacement compressor compressor in which compres
22、sion is obtained by changing the internal volume of the compression chamber SOURCE: EN 378-1:2008+A2:2012, 3.4.6 3.2 refrigerating capacity product of the low pressure mass flow of refrigerant through the compressor and the difference between the specific enthalpy of the refrigerant at the low press
23、ure of the compressor inlet and the specific enthalpy of fluid entering the evaporator expansion device Note 1 to entry: This latter enthalpy is related to the stated fluid temperature under following pressure conditions: for single-stage expansion cycles the compressor discharge pressure; for multi
24、ple-stage expansion cycles the pressure (dew point temperature) at the corresponding compressor intermediate port. The refrigerant at the low compressor inlet is superheated above the suction dew point temperature to the stated value. Note 2 to entry: Condensing temperature is defined as saturated d
25、ew point temperature. BS EN 12900:2013EN 12900:2013 (E) 5 3.3 subcooling difference between the bubble point temperature of the refrigerant corresponding to the compressor discharge pressure and the temperature of the liquid refrigerant below the bubble point 3.4 suction gas superheat difference bet
26、ween the dew point temperature of the refrigerant corresponding to the compressor suction pressure and the suction gas temperature of the refrigerant at the compressor inlet 3.5 power absorbed for externally driven compressors: the power at the compressor shaft for motor compressors: the electrical
27、power input at the motor terminals for motor compressors with a specific means of factory assembled or factory specified frequency inverter for variable speed (part load) capacity regulation, the electrical power input at the inverter input terminals 3.6 coefficient of performance COPrratio of refri
28、gerating capacity to the power absorbed 3.7 subcritical operation operating condition with discharge pressure level below the critical pressure 3.8 transcritical operation operating condition with discharge pressure level above the critical pressure 3.9 part load operation for compressors with capac
29、ity control mechanism, part load is interpreted as operation with active capacity control at reduced capacity Note 1 to entry: On/off cycling of the compressor motor is not considered as capacity control in this context for declaration of part load performance. 3.10 fluid refrigerant liquid, gas or
30、vapour including the state of appearance close to and above the critical pressure 3.11 evaporating temperature dew temperature corresponding to the suction pressure of the compressor 3.12 condensing temperature dew temperature corresponding to the discharge pressure of the compressor BS EN 12900:201
31、3EN 12900:2013 (E) 6 4 Parameters for the presentation of performance data The parameters as shown in Table 1 to Table 4 shall be used for the presentation of the performance data. Table 1 Parameters for the presentation of performance data with compressors used in standard applications Refrigerant
32、Parameters Suction gas temperature (C) or superheat (K) at the compressor inlet Ambient temperature around the compressor Compressor Application Halocarbons and hydrocarbons including refrigerant blends 32 C 35 C Household and similar refrigerators/ freezers 20 C or 10 K Other applications R 744 (CO
33、2) 32 C Household and similar refrigerators/ freezers 10 K (30 Ca ) Other applications R 717 5 K Any application using ammonia Other refrigerants As appropriate, to be clearly specified in performance data aReference point A5, Table 6. The refrigerating capacity shall not allow for any fluid subcool
34、ing for subcritical operation. For transcritical operation refrigeration capacity has to be related to the gas cooler outlet temperature and the compressor discharge pressure. If reference points mentioned in Table 5 to Table 7 fall inside the compressor application envelope, compressor performances
35、 shall be displayed at those rating conditions. For CO2transcritical applications gas cooler outlet temperature shall be displayed. NOTE Tables 2 to 4 refer to economised cycles. BS EN 12900:2013EN 12900:2013 (E) 7 Table 2 Parameters for the presentation of performance data with compressors using a
36、specific means of factory assembled or factory specified liquid subcooler (subcritical operation) or aftercooler (transcritical operation) Refrigerant Suction gas temperature (C) or superheat (K) at the compressor inlet Ambient temperature around the compressor Compressor application Halocarbons and
37、 hydrocarbons including refrigerant blends 20 C or 10 K 35 C Any application with factory assembled or factory specified subcooler or aftercooler R 744 (CO2) 10 KaR 717 (NH3) 5 K Other refrigerants As appropriate, to be clearly specified in performance data NOTE For subcritical operation liquid ente
38、ring the subcooler is at saturated (bubble) temperature equivalent to the refrigerant pressure at the compressor outlet. For transcritical operation fluid entering the aftercooler is at gas cooler outlet temperature and compressor discharge pressure. aOr other conditions from Table 6. The refrigerat
39、ing capacity includes the subcooling provided by the subcooler or additional cooling provided by the aftercooler. For CO2 transcritical applications gas cooler outlet temperature shall be displayed. Table 3 Parameters for the presentation of performance data with compressors using an individually se
40、lected liquid subcooler (subcritical operation) or aftercooler (transcritical operation) Refrigerant Suction gas temperature (C) or superheat (K) at the compressor inlet Liquid subcooling (K) or temperature (C) Saturated intermediate (dew) temperature (C) or pressure (bar) Ambient temperature around
41、 the compressor Compressor application Halocarbons and hydrocarbons including refrigerant blends 20 C or 10 K 5 K above bubble point temperature corresponding to the pressure at the intermediate port of the compressor to be specified with reference to suction and discharge pressure 35 C Any applicat
42、ion with individually selected subcooler or aftercooler R 744 (CO2) 10 KaR-717 (NH3) 5 K Other refrigerants As appropriate, to be clearly specified in performance data NOTE For subcritical operation liquid entering the subcooler is at saturated (bubble) temperature equivalent to the refrigerant pres
43、sure at the compressor outlet. For transcritical operation fluid entering the aftercooler is at gas cooler outlet temperature and compressor discharge pressure. aOr other conditions from Table 6. The refrigerating capacity includes the subcooling provided by the subcooler or additional cooling provi
44、ded by the aftercooler. For CO2transcritical applications gas cooler outlet temperature shall be displayed. BS EN 12900:2013EN 12900:2013 (E) 8 Table 4 Parameters for the presentation of performance data with compressors using an open flash interstage receiver (tank) Refrigerant Suction gas temperat
45、ure (C) or superheat (K) at the compressor inlet Liquid temperature (C) Saturated intermediate (dew) temperature (C) or pressure (bar) Ambient temperature around the compressor Compressor application Halocarbons and hydrocarbons including refrigerant blends 20 C or 10 K bubble point temperature corr
46、esponding to the pressure at the intermediate port of the compressor to be specified with reference to suction and discharge pressures 35 C Any application with open flash receiver R 744 (CO2) 10 KaR 717 (NH3) 5 K Other refrigerants As appropriate, to be clearly specified in performance data NOTE Fo
47、r subcritical operation liquid entering the interstage receiver is at saturated (bubble) temperature equivalent to the refrigerant pressure at the compressor outlet. For transcritical operation fluid entering the expansion device to the interstage receiver is at gas cooler outlet temperature and com
48、pressor discharge pressure. aOr other conditions from Table 6. The refrigerating capacity refers to the bubble point temperature corresponding to the pressure at the compressor intermediate port. For CO2 transcritical applications gas cooler outlet temperature shall be displayed. 5 Requirements The
49、performance data of a refrigerant compressor shall be presented in tabular or graphical form as shown in 6.2 or in polynomial form as shown in 6.3. At least one of the selected forms shall show the performance data covering the entire application range. Any operating point published by the manufacturer and falling within the envelopes shown in Figures 1 and 2 shall comply with the tolerances defined in Table 8. The performance of the compressor at the standard reference points in Clause 7 shall also be reported. To generate
