Thermodynamic analysis of the actual air cycle refrigeration system

The thermodynamic analysis of the actual air cycle refrigeration is performed. The results show that, the factors on the performance of the actual cycle include the pressure ratio, the isentropic efficiencies of the rotors, working temperature and etc.; there is an optimal pressure ratio for the actual cycle; the refrigerator can be used for air conditioning near the optimal pressure ratio. Those factors are important for engineering design.