临界循环热泵性能研究

he paper presents a critical heat pump system of HFC, and analyses and discusses its property and the choice of the cycle agent. The paper calculates the thermodynamics properties of the critical heat pumps of several refrigerants. We compare it with the system of normal intermediate or high temperature heat pump. We find the critical heat pump has higher COPh, littler compression ratio and compressor output, but higher pressure of the cycle. The results show the critical heat pump systems will get its better application because of its higher energy efficiency.