Hie conversion of energy was analyzed thoroughly in the working process of steam ejector refrigeration system. The thermodynamic models of ejector, condenser and evaporator were built. Based on operating parameters, the simulative calculations for entrainment ratio, steam consumption and water consumption were made with the software of MATLAB. Taking the en-trainment ratio as evaluation standard, it discussed the influence on system performance caused by generator pressure(P^), evaporator temperature ( Tc) and condenser temperature ( Tc). The results indicate that only when Pg ≤ 15 aim, Tt≥ 8℃, Tc≤37℃ the system can work with better economical efficiency.%对蒸汽喷射制冷工作过程中能量转化进行了深入分析,建立了制冷系统中的三个关键部件——喷射器、冷凝器及蒸发器的热力学模型.以此为基础,结合运行参数,采用Matlab软件,对喷射系数、蒸汽消耗量以及循环水耗量进行仿真计算.探讨了以喷射系数为评定标准时,工作蒸汽压力Pg、冷凝温度Tc、蒸发温度Te对系统性能的影响.分析结果表明:当Pg≤15atm,Te≥8℃,Tc≤37℃时,可使系统工作在具有较好经济性的范围内.
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