AN EXPERIMENTAL INVESTIGATION OF A REFRIGERATION COMPRESSOR USING HFC 134a AS A WORKING SUBSTANCE

摘要

A proto type compressor using HFC 134a as a working substance is designed. As the specific volume of HFC 134a is larger than that of CFC 12, the mass flow rate and capacity are decreased. Reduction of residual gas and suction gas temperature and improvement of suction gas passage, motor efficiency, use of low viscosity oil are considered to improve the performance of a HFC 134a compressor. By these modifications, the COP of (Coefficient of Performance) HFC 134a compressor could be improved by 20%. The results of compressor life tests and compatibility tests practiced with 4 kinds of ester oil are reported.