一、引言 HFCl52a作为一种制冷剂已越来越引人们的重视,它不但是性能优良的的共沸混合物R500的成分之一,而且因其对大氧自臭氧层的破坏势(ODP)为零,己有大量的研究致力于用HFCl52a或HFCl52a与其它工质的混合物来替代CFCl2作为冰箱的工作介质。对HFCl52a的基础物性虽然已有一些实验结果及数据关联工作发表,但其适用范围大多都在273.15K以上,ASHRAE数据手册中给出的物性表虽然已达—100℃, I. INTRODUCTION As a refrigerant, HFCl52a has attracted more and more attention. It is not only one of the components of the azeotropic mixture R500 with excellent performance, but also has zero ODP , There has been a great deal of research devoted to the replacement of CFCl 2 with HFCl52a or a mixture of HFCl52a and other refrigerants as a working medium for refrigerators. Although the basic physical properties of HFCl52a have been published in some experimental results and data related work, most of its applicability is above 273.15K. Although the physical property table given in the ASHRAE data sheet has reached -100 ℃,