SIST EN 12900:2006

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Refrigerant compressors - Rating conditions, tolerances and presentation of manufacturer's performance dataCompresseurs pour fluides frigorigenes - Conditions de détermination des caractéristiques, tolérances et présentation des performances du fabricantKältemittel-Verdichter - Nennbedingungen, Toleranzen und Darstellung von Leistungsdaten des HerstellersTa slovenski standard je istoveten z:EN 12900:2005SIST EN 12900:2006en27.20023.140ICS:SIST EN 12900:20011DGRPHãþDSLOVENSKI
STANDARDSIST EN 12900:200601-julij-2006







EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12900October 2005ICS 23.140; 27.200Supersedes EN 12900:1999
English VersionRefrigerant compressors - Rating conditions, tolerances andpresentation of manufacturer's performance dataCompresseurs pour fluides frigorigènes - Conditions dedétermination des caractéristiques, tolérances etprésentation des performances du fabricantKältemittel-Verdichter - Nennbedingungen, Toleranzen undDarstellung von Leistungsdaten des HerstellersThis European Standard was approved by CEN on 26 August 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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 other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2005 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12900:2005: E



EN 12900:2005 (E) 2
Contents Page Foreword.3 1 Scope.4 2 Normative references.4 3 Terms and definitions.4 4 Parameters for the presentation of performance data.5 5 General requirements.7 6 Performance data.7 7 Standard reference points.8 8 Tolerances.8 9 Correction factors.9



EN 12900:2005 (E)
3 Foreword This European Standard (EN 12900:2005) has been prepared by Technical Committee CEN/TC 113 “Heat pumps and air conditioning units”, the secretariat of which is held by AENOR. 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 2006, and conflicting national standards shall be withdrawn at the latest by April 2006. This European Standard supersedes EN 12900:1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following coun-tries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Esto-nia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.



EN 12900:2005 (E) 4
1 Scope This European Standard specifies the rating conditions, tolerances and the method of presenting manufacturer’s data for positive displacement refrigerant compressors. These include single stage compressors and single and two stage compressors using a means of liquid subcooling. This is required so that a comparison of different refrig-erant compressors can be made. The data relate to the refrigerating capacity and power absorbed and include cor-rection factors and part-load performance where applicable. 2 Normative references The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 378-1:2000, 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 testing and test methods – Part 1: Refrigerant compressors ISO 817, Refrigerants —Designation system 3 Terms and definitions For the purposes of this European Standard, the terms and definitions of EN 378-1:2000 and the following apply. 3.1 positive displacement compressor compressor in which compression is obtained by changing the internal volume of the compression chamber, see 3.4.6 of EN 378-1:2000 3.2 refrigerating capacity product of the mass flow of refrigerant through the compressor and the difference between the specific enthalpy of the refrigerant at the compressor inlet and the specific enthalpy of saturated liquid NOTE The refrigerant at the compressor inlet is superheated above the suction dew point temperature to the stated value (see Table 1). The saturated liquid is at a pressure corresponding to the compressor discharge pressure. 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 superheat difference between the dew point temperature of the refrigerant corresponding to the compressor suction pressure and the suction vapour 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 power input at the motor terminals 3.6 coefficient of performance, COPr ratio of refrigerating capacity to the power absorbed, expressed in Watt/Watt



EN 12900:2005 (E)
5 4 Parameters for the presentation of performance data The parameters as shown in Table 1a – Table 1 d shall be used for the presentation of the performance data. Table 1 a — Parameters for the presentation of performance data with compressors
used in standard applications Parameters Refrigerant Suction vapour temperature (°C)
or superheat (K) at the compressor inletAmbient temperature around the compressor Compressor application 32 °C Household and similar refrigerators/freezers Halocarbons and hydrocarbons including refrigerant blends 20 °C or 10 K Other applications R-717 5 K Any application using
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