The Performance Analysis of R32 Rotary Compressor Used for Room Air Conditioners

Abstract

R32 has been used as an alternative refrigerant of R410A in room air conditioners for its zero ODP, low GWP, and high performance. In this study, performance of R32 hermetic rotary compressor with high pressure shell was analyzed with a more comprehensive theoretical model. The simulation results showed good agreement with the experimental results. Besides, in order to improve the accuracy, in the theoretical model, the two phase leakage model was chosen in the leakage passage of radial clearance, and the gas leakage was considered in the side of sliding vane when the height of oil level is lower than the upper end face of cylinder. The analysis results show that the main factors that influence the cooling capacity are heating loss and leakage loss, and the main factors that influence the input power are discharge pressure loss, suction heating loss, clearance volume loss, bearing friction loss and sliding vane friction loss. The theoretical model would have great useful for designation and performance optimization of rotary compressor.