跨临界二氧化碳蒸气压缩/喷射制冷循环  

Thermodynamic Analysis on CO_2 Transcritical Vapor- Compression/Ejection Refrigeration Cycle

作　　者：刘军朴[1] 陈江平[1] 陈芝久[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200030

出　　处：《上海交通大学学报》2004年第2期273-275,共3页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金(50060007);上海市汽车工业科技发展基金资助项目

摘　　要：提出一种新的蒸气压缩/喷射混合制冷循环,采用喷射器代替节流阀,以回收膨胀过程中的一部分动能,降低压缩机工作压比,达到节能的目的.针对这种新的循环进行了理论分析和计算,并与相同工况下的简单蒸气压缩制冷循环进行比较,讨论了喷射器喷射系数及其效率对循环性能的影响.计算结果表明,新循环能有效地提高跨临界CO2系统的性能.A vapor-compression/ejection hybrid refrigeration cycle was proposed. In the cycle, an ejector was used to replace the throttling valve to recover some of the kinetic energy of the expansion process. The compress ratio of compressor was reduced, and the cycle performance was improved. The theoretical analysis and simulation of the cycle were carried out. The comparison between the new cycle and the standard vapor-compression cycle was made under the same operating conditions. The effects of ejector entrainment ratio and efficiency on the cycle performance were discussed. The results indicate that the cycle improves the trans-critical CO2 cycle performance.

关 键 词：二氧化碳 压缩 喷射 制冷 

分 类 号：TB61[一般工业技术—制冷工程]