太阳能两级喷射式制冷系统性能的模拟及其分析  

Simulation and analysis on the two-stage ejector refrigeration system performance of solar refrigeration

作　　者：王子敬[1] 王辉涛[1] 包桂蓉[1] 李勤[1] 

机构地区：[1]昆明理工大学冶金节能减排教育部工程研究中心,昆明650093

出　　处：《低温与超导》2012年第8期69-72,77,共5页Cryogenics and Superconductivity

基　　金：国家自然科学基金项目(51066002);NSFC-云南联合基金项目(U0937604)

摘　　要：讨论了一种新型的太阳能制冷系统——带回热器的太阳能两级喷射式制冷系统。该系统最大的特点是将两个喷射器串联在一起,以提高整个太阳能制冷系统的性能系数。分别采用R134a、R152a、R245ca和R227ea为制冷工质下系统性能系数COP随两级间总压比分配度不同的变化关系。这四种制冷剂的两级压缩比的变化对总喷射系数的影响各有不同,并提出了气体喷射器的总压缩比1.2—2.8之间两级压缩比的不均匀分配原则。A new combined refrigeration system, i.e. two - stage ejector refrigeration system with regenerator of solar refrige- ration was studied theoretically. The system was characterized by two injectors in series to improve the coefficient of performance （COP） of the solar cooling system. These system characteristics in use of R134a,R152a ,R245ca and R227ea respectively as a working fluid were calculated. The changes of two - stage compression ratio of four working fluids affected the total ejector coeffi- cient. How to distribute the two - stage compression ratio between 1.2 and 2.8 of the total of the compression ratio was gived.

关 键 词：太阳能喷射式制冷 制冷工质 性能系数 两级喷射器 

分 类 号：TB657[一般工业技术—制冷工程]