工质对内回热压缩式制冷循环的热力性能影响  

Effect of Refrigerant on Thermodynamic Performance of Compressionrefrigeration with Internal Heat Exchanger

作　　者：王伟超 严彦 潘钊 Wang Weichao;Yan Yan;Pan Zhao(School of Mechanical and Electrical Engineering,Xi'an Polytechnic University,Xi'an 710048,China)

机构地区：[1]西安工程大学机电工程学院,西安710048

出　　处：《科技通报》2024年第1期26-31,共6页Bulletin of Science and Technology

基　　金：国家自然科学基金资助项目(51375286);陕西省自然科学基础研究计划资助项目(2023-JCQN-0154);国家留学基金委(CSC)项目(202208610115)。

摘　　要：本文建立了带有内回热的单级压缩式制冷系统的理论模型,选取15种不同临界温度的干湿工质,分析了工质物性对系统制冷量、容积制冷量及制冷系数之比的影响。研究结果表明:当冷凝温度为60℃,蒸发温度为10℃时,所有工质的系统制冷量均随过热度的增加而增大,整体来说,HFC类工质的制冷量整体较大,其次是HFO类工质,FC类工质最少。对于容积制冷量和制冷系数之比,R22、R32及氨随过热度的增加而减小,其余工质均随过热度的增加而增大,说明工质R22、R32及氨对回热循环不利。A theoretical model of a single-stage compression refrigeration system with internal heat recovery is established.Fifteen kinds of dry and wet refrigerants with different critical temperatures are selected,and the effects of the physical properties of refrigerants on the refrigeration capacity,volumetric refrigeration capacity and the ratio of refrigeration coefficient are analyzed.The results show that when the condensation temperature is 60℃and the evaporation temperature is 10℃,the system refrigeration capacity of all refrigerants increases with the increase of superheat.Overall,the refrigeration capacity of HFC refrigerants is larger,followed by HFO refrigerants,and FC refrigerants are the least.For the ratio of volumetric refrigerating capacity to refrigerating coefficient,R22,R32 and ammonia decrease with the increase of superheat,while other working fluids increase with the increase of superheat,which indicates that R22,R32 and ammonia are unfavorable to the regenerative cycle.

关 键 词：压缩式制冷 内回热器 制冷工质 热力性能 

分 类 号：TK123[动力工程及工程热物理—工程热物理]