ALTERNATIVE REFRIGERANT TO R-22 IN LOW-TEMPERATURE AND AIR-CONDITIONING REFRIGERATORS

摘要

R-32/125/134a/600 was proposed for an alternative refrigerant for replacing R-22 in large-scale refrigeration-cycle systems to reach ―30°C in our previous report. We tested actual performance in an equipment with a nominal cooling capacity of 30.2 kW refrigerator designed for a 858 m~3 refrigerated warehouse and a refrigeration- and Lorentz-cycle testing-apparatus with a 0.55 kW nominal energy consumption compressor at several temperature conditions of air-conditioning application. As a result, it is confirmed that cycle performance and pressure conditions of R-32/125/134a/600 are very similar to R-22 and actual performance of R-32/125/134a/600 is better than that of R-22.