利用熵产最小法分析R290/CO_2复叠式制冷循环  

The Analysis of R290/CO_2 Cascaded Refrigeration Cycle Using an Entropy Generation Minimization Method

作　　者：宁静红[1] 查世彤[1] 李慧宇[1] 彭苗[1] 

机构地区：[1]天津商学院制冷系,300134

出　　处：《制冷与空调（四川）》2007年第1期85-88,共4页Refrigeration and Air Conditioning

摘　　要：介绍了低温环境下采用自然工质R290和CO2的复叠式制冷循环,用熵产最小法对R290/C02复叠式低温制冷循环进行了分析,利用熵产最小法确定R290/C02复叠式低温制冷循环的最佳中间温度。为提高R290/C02复叠式低温制冷循环的效率,应减少蒸发器、冷凝器和冷凝蒸发器的传热温差,可以看出R290/C02的复叠式制冷循环在低温制冷条件下有很好的发展前景。This paper introduces a cascaded refi＇igeration cycle that uses natural refiigerants of R290 and CO2 at low temperature. The optimal intermediate temperature of R290 / CO2 cascaded refiigeration cycle is determined by using the entropy generation minimization method. For enhancing the efficiency of R290 / CO2 cascaded refiigeration cycle, it is necessary to reduce the heat transfer temperature difference of evaporator, condenser and condenser-evaporator. It can be concluded that R290 / CO2 natural refi＇igerants cascaded refi＇igeration cycle has a good future.

关 键 词：R290/CO2 复叠式低温制冷循环 熵产 最佳中间温度 

分 类 号：TB611[一般工业技术—制冷工程]