自然工质在小型超市制冷系统中应用的理论分析  

Theoretical analysis of natural refrigerants used in small supermarket refrigeration systems

作　　者：王亮[1] 刘妮[1] 

机构地区：[1]上海理工大学动力学院,上海200093

出　　处：《制冷技术》2008年第4期58-60,共3页Chinese Journal of Refrigeration Technology

基　　金：上海市重点学科建设项目(T0503)

摘　　要：本文对低温级以CO2为工质的超市复叠式制冷系统进行了热力学理论分析,计算了不同蒸发温度、冷凝温度和不同传热温差下的COP,并与传统的超市复叠制冷循环进行对比分析。结果发现自然工质CO2/NH3复叠制冷系统的性能效率为最好,而R290/CO2复叠制冷系统的COP与使用传统工质的相当。因此,将自然环保工质复叠式制冷系统应用于小型超市具有很好的应用前景。In this paper the thermodynamic cycle of cascade refrigeration system for small supermarkets using CO2 as low temperature stage refrigerant was analyzed and the COPs under different evaporation temperature, condensation temperature and heat - transfer temperature difference were calculated. By comparing with the cascade refrigeration systems using traditional refrigerants, it was found that the performance of the natural refrigerant such as CO2/ NH3 will be better, and the performance with R290/CO2 are nearly equal to the traditional ones. Therefore, the application of natural environmental friendly refrigerants in cascade refrigeration system for small supermarket will have a good prospect.

关 键 词：环保 自然工质 复叠制冷系统 

分 类 号：TB65[一般工业技术—制冷工程]