Design Optimization for the Discharge System of the Rotary Compressor Using Alternative Refrigerant R410a

R410a Refrigerant which is one of HFC refrigerants is being considered to be a promising replacement for R22 which is widely used in air conditioners. The rotary compressor for R410a has lower energy efficiency than that for R22 because of the high pressure difference between suction chamber and discharge chamber in the compression part. Also the re-expansion gas loss of the rotary compressor for R41 Oa which occurs at a discharge port becomes larger than that for R22 due to high density of R410a refrigerant. Therefore for the purpose of high energy efficiency, we have carried out P-V analyses for various design parameters of the discharge system. The results such as performance data, over-compression losses, and reexpansion losses are acquired by P-V (Pressure-Volume) analyses and analyzed specifically for various parameters. As a conclusion, we could find out the effects of several designs parameters of its discharge system and reduce its losses of re-expansion and over-compression.