二氧化碳复叠式制冷循环的热力性能分析  

Analysis of thermodynamic performance in CO_2 cascade refrigeration cycle

作　　者：吕静[1] 王伟峰[1] 周传煜[1] 

机构地区：[1]上海理工大学城建学院,上海200093

出　　处：《低温工程》2008年第4期38-41,共4页Cryogenics

基　　金：上海市教育委员会重点学科建设项目(J50502)资助

摘　　要：分析了CO2的热力特性和CO2复叠式制冷循环的优势及应用现状,概述了复叠式制冷循环的原理及组成,从理论和实验两个方面对NH3/CO2和R290/CO2复叠式制冷循环进行了分析,得出了COP以及高低压级质量流量比与蒸发温度、冷凝温度、冷凝蒸发温差之间的关系。The thermodynamic characteristics of carbon dioxide, the advantage and application of carbon dioxide cascade refrigeration cycle were analyzed. The principle and composition of cascade refrigeration cycle were outlined. The cascade refrigeration cycles using NH3/CO2 and R290/CO2 as refrigerant were studied theoretically and experimentally and the relations between COP, ratio of mass flow rate and evaporating temperature, condensing temperature, evaporating-condensing temperature difference were drawn.

关 键 词：二氧化碳 复叠式制冷循环 热力性能 COP 

分 类 号：TB611[一般工业技术—制冷工程]