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COMMERCIAL REFRIGERATION AND CFCS.

Author(s) : MUIR E. B.

Type of article: Article, IJR article

Summary

THE AUTHOR DESCRIBES THE PROCESS CONSIDERED BY THE COPELAND COMPANY TO SPEED UP THE PHASE-OUT OF REFRIGERANTS WHICH DEPLETE THE OZONE LAYER. THIS PROCESS INCLUDES THREE STEPS: 1) PHASE-OUT OF R12 AND CHARGING OF COMPRESSORS WITH R22: DOWN TO 249.5 K (-23.5 DEG C) AND WITH R502 ; 2) MODIFICATION OF THE EXISTING COMPRESSORS IN ORDER TO ADAPT THEM TO R22, FOR APPLICATIONS AT AN EVAPORATION TEMPERATURE DOWN TO 233 K (-40 DEG C) ; AND 3) DEVELOPMENT OF COMPRESSORS FOR THE NEW REFRIGERANTS. THE PROBLEMS, IN THE LATTER CASE, CONCERN THE COMPRESSION DISPLACEMENTS WHICH ARE HIGHER FOR R134A, AND WHICH LEADS TO A CONSIDERABLE CAPACITY REDUCTION, AT MEDIUM AND LOW TEMPERATURES. THE LOW CRITICAL TEMPERATURE OF R125 LIMITS ITS UTILIZATION.

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Pages: 106-112

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Details

  • Original title: COMMERCIAL REFRIGERATION AND CFCS.
  • Record ID : 1991-1025
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 13 - n. 2
  • Publication date: 1990

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