应用稳流系统的火用方程 ,分析了单级蒸气压缩式制冷系统中各主要装置的火用平衡 ,导出了各装置的火用损及制冷系统火用效率的工程计算式 ,并对影响火用损的相关因素进行了分析 ,提出了减小系统主要设备火用损的措施 ,最后对一实际制冷系统的火用损进行了分析计算 ,指出了该系统存在的薄弱环节及改进方向 Based on the exergy equation of the steady flow system, the exergy balance of each main unit in a single-stage vapor compression refrigeration system is analyzed, and the engineering calculation formulas of the exergy loss and the exergy efficiency of the refrigeration system are deduced. The paper analyzes the related factors of damage, puts forward the measures to reduce the exergy loss of the main equipment of the system, and finally analyzes and calculates the exergy loss of an actual refrigeration system, points out the weak links and the improvement direction of the system