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基于热力学第一定律和热经济学理论对以R123、R134a、R717、R236fa和R600a为制冷剂的太阳能喷射制冷系统的蒸发温度、冷凝温度和发生温度进行热经济性能优化.提出一个系统总投资成本的目标优化模型.以热经济指数(单位制冷量所需的总费用)为系统热经济性能评价指标,计算并讨论在不同的质量流速条件下,不同制冷剂热经济指数的大小及其随工况的变化.研究结果表明:制冷剂R717的热经济指数最低,即其热经济性能最优,制冷剂的热经济指数均随制冷剂质量流速的增加而增加.对于不同的制冷剂,最优温度的变化范围不大,最优蒸发温度为8~10℃,最优冷凝温度为33~34℃.发生温度越低,系统的热经济性越好.“,”The thermo-economic performance optimization on the evaporation temperature,condensation temperature and generation temperature of solar ejector refrigeration system with R123,R134a,R717,R236fa and R600a as refrigerant was carried out based on the first law of thermodynamics and thermo-economic theory. A goal optimization model of total investment cost of ejector refrigeration system was proposed. Taking the thermo-economic index which is the total cost in per refrigeration capacity as the thermo-economic evaluation indicator,the value and the change of thermo-economic index with various refrigerants in different mass flow speeds and different operating conditions were calculated and discussed. The results indicate that thermo-economic index of refrigerant R717 is the lowest,that means it has the best thermo-economic performance. The thermo-economic index increases with the higher mass flow speed. The optimal temperature changes little with various refrigerants. The optimal evaporation temperature is 8-10℃,the optimal condensation temperature is 33-34℃. The thermo-economic performance is better as the generation temperature getting lower.