流体机械

2007, No.416(02) 53-57+21

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带回热器的自然工质复叠制冷系统性能分析
Analysis on the Performance of Nature-refrigerant Cascade Refrigeration System Using Liquid-suction Heat Exchanger

张于峰;贡征峰;牛宝联;谢慧;刘涛;
ZHANG Yu-feng,GONG Zheng-feng,NIU Bao-lian,XIE Hui,LIU Tao(Tianjin University,Tianjin 300072,china)

摘要(Abstract):

以CO2/R290、CO2/NH3复叠式制冷循环为例分析了回热器对系统性能的影响,在考虑回热器对系统质量流量影响的基础上,比较分析了系统制冷量、COP的变化和对最佳中间温度的影响,指出了利用回热器提高复叠制冷系统性能的原则,并建立了高低温回热器效率之间的联系。
Focuses on the effect of heat exchangers on the performance of CO_2/R290、CO_2/NH_3 cascade refrigeration cycle.The variation of system capacity、coefficient of performance(COP) and optimum intermediate temperature was analyzed considering the impact of heat exchangers on mass flow,the principle of improving the performance of cascade refrigeration using liquid-suction heat exchangers was pointed out at the same time,and the relationship of heat exchanger effectiveness between high temperature stage and the lower one was also calculated.

关键词(KeyWords): 复叠式制冷循环;回热器;质量流量;回热器效率
cascade refrigeration cycle;liquid-suction heat exchangers;mass flow;heat exchanger effectiveness

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作者(Author): 张于峰;贡征峰;牛宝联;谢慧;刘涛;
ZHANG Yu-feng,GONG Zheng-feng,NIU Bao-lian,XIE Hui,LIU Tao(Tianjin University,Tianjin 300072,china)

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