恒温热源实际回热式布雷顿制冷循环性能分析

用有限时间热力学方法分析实际制冷循环性能，计入工质与高、低温热源间换热器和回热器的热阻损失，压缩机和膨胀机中的不可逆损失和管道中的压力损失，导出恒温热源条件下实际国热式布雷顿制冷循环的制冷率、制冷系数与循环压比间的解析式，并给出了详细的数值算例。

Performance Analysis for a Real Regenerated Brayton Refrigeration Cycle with Constant-Temperature Heat Reservoirs

Performance analysis of a real refrigeration cycle has been performed using the method of finite-time thermodynamics. The analytical formulas about the relations between cooling load, COP and pressure ratio of an irreversible closed-regenerated Brayton refrigeration cycle with constant-temperature heat reservoirs are derived. In the analysis, the irreversibities involve the heat resistance losses in the heat exchangers between refrigerant and high- and low-temperature heat reservoirs and the regenerator, the irreversible compression and expansion losses in the compressor and expander, and the pressure drop loss in the pipe and system. Detailed numerical examples are given in this paper.