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0引言目前,传统蒸气压缩制冷已经广泛应用于各种场合,其技术相当成熟。但是随着人们对效率和环保的重视,蒸气压缩制冷的低效率和危害环境这两个缺点变得日益明显。一是传统的气体压缩制冷效率低,只能达到卡诺循环的5%～10%,且能效比小;二是氟利昂工质易泄漏,破坏臭氧层,造成环
0 Introduction At present, the traditional vapor compression refrigeration has been widely used in various occasions, the technology is quite mature. However, with the emphasis on efficiency and environmental protection, the two disadvantages of vapor-compression refrigeration, such as inefficiency and harm to the environment, have become increasingly obvious. First, the traditional gas compression refrigeration efficiency is low, can only reach Carnot cycle of 5% to 10%, and the energy efficiency is small; Second, Freon refrigerant easy to leak, destroy the ozone layer, causing the ring