DEVELOPMENT OF A HIGH-EFFICIENCY DOMESTIC REFRIGERATOR USING CFC SUBSTITUTES

Besides the values of the ozone depletion and global warming potential s, energy consumption is another important index to be considered in d eveloping a refrigeration system using CFC substitutes. Many investiga tors have indicated that unless the original refrigeration system is c orrespondingly adjusted when using CFC substitutes, the energy efficie ncy ratio (EER) of the system will decrease. In this paper, the reason s for a decrease in EER are analysed theoretically, and some proposals for increasing EER are put forward. These proposals are used to devel op a domestic refrigerator charged with a non-azeotropic mixture of HC FC22/HFC152a as the substitute for the original working fluid, CFC 1 2 . The results show that the EER value of the refrigerator charged with this refrigerant mixture is increased by 6.5% compared with that of t he same refrigerator charged with CFC12.