| Compressor with a small amount of liquid refrigerant suction, which is regarded as a method that can reduce the discharge temperature of compressor but not increase the cost, needs to be further researched. The variable flow mass rate of water chiller plant bench was used and R32 as the refrigerant of circulatory system to make a series of related experiments under simulating actual operating conditions, to study on the impact of frequency, refrigerant quality and superheat degree on scroll rotary compressor performance, and reach the conclusion that R32 scroll rotary compressor was suitable for small fluid refrigerant suction. Experimental study results demonstrated that: under the same conditions, the higher the frequency, the higher the system pressure ratio; at the suction saturation point when the frequency was the same, the higher the pressure ratio, the lower the isentropic compression efficiency and volumetric efficiency. However, under the same pressure ratio, the higher the frequency, the higher the isentropic compression efficiency and volumetric efficiency. When suction refrigerant was superheat, there was nearly no impact on compressor efficiency, while when suction small liquid refrigerant, the discharge temperature was falling down sharply, the overall efficiency ratio was highest, and compressor efficiency only had a small decline. |
