Performance Evaluation of Air-Conditioner Using R 452B in Wide Cooling Load Range

Abstract

In selecting a refrigerant, it is necessary to consider not only ODP and GWP but also the impact on global warming from various aspects. It is therefore indispensable to continue to search for better refrigerants that minimize impact on the climate to the total CO2 equivalent. Recently, a new refrigerant R 452B was reported as a high-efficiency refrigerant. There is a possibility that excellent performance may be exhibited depending on the use load of the air conditioner. We carried out cooling performance comparison in wide capacity range for R 452B and R 32. As a result, it was found that the performance difference becomes large in high ambient temperature and high heat load. We also analyzed the causes.