提出了一种低品位热驱动的混合工质双级分离式喷射制冷循环,将混合工质两级分凝分离原理引入喷射制冷循环,大大降低系统压比,实现在喷射制冷中获得较低的制冷温度的同时保证系统有较高制冷效率.建立组成循环各部件热力学数学模型,在系统稳定运行的条件下,分析中间温度对循环主流率、最低蒸发温度、喷射系数和系统性能系数的影响,并得到不同冷凝温度下系统性能系数随中间温度的变化规律.研究表明:新循环采用混合工质R600/R290可获得低于-20℃的制冷温度,中间温度对新循环的工作性能影响显著,合理选择中间温度有利于使该循环获得最低制冷温度和最高制冷效率.
参考文献
[1] | Raul Roman;Jorge I. Hernandez .Performance of ejector cooling systems using low ecological impact refrigerants[J].International Journal of Refrigeration,2011(7):1707-1716. |
[2] | Abdelouahid Dahmani;Zine Aidoun;Nicolas Galanis .Optimum design of ejector refrigeration systems with environmentally benign fluids[J].International Journal of Thermal Sciences,2011(8):1562-1572. |
[3] | Daliang Hong;Guangming Chen;Limin Tang;Yijian He .A novel ejector-absorption combined refrigeration cycle[J].International Journal of Refrigeration,2011(7):1596-1603. |
[4] | Bo Zhang;Xutong Song;Jinsheng Lv;Jixue Zuo .Study on the key ejector structures of the waste heat-driven ejector air conditioning system with R236fa as working fluid[J].Energy and buildings,2012(Jun.):209-215. |
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