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文中介绍了Einstein单压吸收式制冷循环的工作原理,对国内3种有代表性的改进型Einstein制冷系统(Ⅰ, Ⅱ, Ⅲ)进行了对比。运用质量和能量守恒定理,建立了3个系统各部件的热力学模型,并对其性能进行了分析。结果表明:相同工况下,系统Ⅱ的COP(制冷性能系数)最高,达到0.255 1,工况的变化并不能有效改善3个系统的COP,而通过合理匹配系统各部件,优化管道阻力,采用热回收系统、高效气泡泵及选择最佳的发生温度,能够有效改善系统制冷性能,对Einstein(制冷循环)系统的性能优化及工业应用具有重要的指导意义。
The working principle of the Einstein single-pressure absorption refrigeration cycle is introduced in this paper. Three typical representative Einstein refrigeration systems (Ⅰ, Ⅱ and Ⅲ) are compared. Using the theory of conservation of mass and energy, the thermodynamic models of the three system components are established and their performances are analyzed. The results show that under the same operating conditions, the COP of the system II is the highest, reaching 0.255 1. The change of operating conditions can not effectively improve the COP of the three systems. By reasonably matching the components of the system and optimizing the pipe resistance, The heat recovery system, efficient bubble pump and the selection of the optimum temperature for generation can effectively improve the refrigeration performance of the system, which is of great significance to the performance optimization and industrial application of the Einstein system.