R125/R600a二元混合物的热力学性质  

THERMODYNAMIC PROPERTIES OF R125/R600a BINARY MIXTURE

作　　者：陈建新[1] 胡芃[1] 陈则韶[1] 江斌[1] 

机构地区：[1]中国科学技术大学热科学和能源工程系,安徽合肥230027

出　　处：《工程热物理学报》2008年第4期553-556,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.50336020)

摘　　要：基于制冷剂物性计算软件NIST REFPROP 7.0及R125/R600a气液相平衡实验数据,使用MBWR状态方程结合Lemmon-Jacobsen混合物模型,对R125/R600a(50/50 mass%)混合替代工质的热力学性质进行了计算,并制作给出了其压焓图(p-h)、温熵图(T-s)和比定压热容图(c_p-T)及饱和性质表。最后理论计算分析了其空调制冷工况的性能,结果表明该混合工质具有与R22相当的压缩比和COP值,比R22较低的排气温度和较高的单位质量制冷量.On the basis of the NIST REFPROP 7.0 Database and the vapor-liquid phase equilibria data, thermodynamic properties of R125/R600a （50/50 mass %） binary mixture are calculated by MBWR equation of state coupling with Lemmon-Jacobsen mixing rules. The pressure-enthalpy diagram, temperature-entropy diagram, isobaric heat capacity-temperature diagram and the table of saturated vapor and liquid properties for R125/R600a （50/50 mass %） are given. Its theoretical performance is calculated at air conditioning work condition. The results show that the R125/R600a （50/50 mass%） system has almost the same compression ratio and COP, lower discharge temperature and higher refrigerating effect compared with the R22 system.

关 键 词：热力学性质 R125/R600a 制冷替代工质 

分 类 号：TK123[动力工程及工程热物理—工程热物理]