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 refrigeration 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 coefficient. How to distribute the two - stage compression ratio between 1. 2 and 2. 8 of the total of the compression ratio was gived.
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