intermediate pressure; optimation; refrigeration system
As well known, the performance of the compressor is concerned with the corresponding refrigeration system. In this paper, by comparing three types of refrigeration cycle, an optimized range of the intermediate pressure for gaining better coefficient of performance (COP) is proposed. Additionally, the effect of the cycle on the construction of the compressor and performances under different refrigerants are discussed. The simulation result indicates that the coefficient of intermediate pressure under freezing condition and refrigeration condition ranges from 0.81 to 0.91 and 0.93 to 0.97, respectively. The results obtained here may provide some guides for the optimal design and operation of practical refrigeration system.