WORKING MEDIUM FOR HEAT PUMP

摘要

PURPOSE:To obtain a working medium exhibiting a high coefficient of heat performance, by adding a mixture of chlorodifluoromethane with chloropentafluoroethane to dichlorodifluoromethane. CONSTITUTION:A wording medium comprising dichlorodifluoromethane (flon-12) contg. 2-20wt% mixture of chlorodifluoromethane (flon-22) with chloropentafluoroethane (flon-15) in a weight ratio of 45-50/55-50. A mixture of flon-22 with flon-15 in a weight ratio of 48.8/51.2 is an azeotropic mixture and known as flon-502. The use of this working medium compsn. as a working medium for a heat pump contributes to an increase of 5- about 10% in the coefficient of heat performance (COP).