PERFORMANCE AND HEAT-TRANSFER CHARACTERISTICS OF HFC-134A AND CFC-12 IN A WATER CHILLER

A water chiller with an open reciprocating compressor has been used to comparatively assess the performance of HFC-134a with reference to CF C-12 under as close to identical conditions as possible. Performance c haracteristics of the chiller under retrofit conditions show that HFC- 134a offers better cooling load and coefficients of performance vis-a- vis CFC-12 for identical operating conditions. Further heat transfer a nalysis of data for the condenser shows that the condensing heat trans fer coefficients for HFC-134a are superior to CFC-12. The better perfo rmance of HFC-134a may be ascribed to the better heat transfer coeffic ient of HFC-134a over CFC-12. (C) 1998 Elsevier Science Ltd. All right s reserved.