二元HFCs和HCs均相共沸物的预测方法研究  

PREDICTION OF AZEOTROPY FOR BINARY HFCs AND HCs HOMOGENEOUS MIXTURES

作　　者：董学强[1,2] 公茂琼[1] 张宇[1] 吴剑峰[1] 

机构地区：[1]中国科学院理化技术研究所低温工程学重点实验室,北京100190 [2]中国科学院研究生院,北京100049

出　　处：《工程热物理学报》2009年第4期562-564,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50576102)

摘　　要：本文提供了一种直接预测HFCs(氢氟烃)和HCs(烃)二元均相共沸物的方法。本方法基于UNIFAC和Wilson活度系数模型,无需实验数据。先由UNIFAC模型获得Wilson二元相互作用系数,然后对热力学关系式进行简单的化简,应用牛顿迭代法对二元混合物压力求极值,从而获得共沸组分。实例计算显示,预测结果与实验数据具有良好的一致性。A method used to predict azeotropes for binary HFCs and HCs homogeneous mixtures was presented. Only the UNIFAC and Wilson activity coefficient models were used in this work and the experiment data were not necessary. The Wilson parameters were calculated from the UNIFAC method, and then the Newton＇s method was used to calculate the pressure extremum according to the thermodynamic equation for the binary mixtures in order to obtain the composition of the azeotropes. The results showed good agreement with the experimental data.

关 键 词：均相共沸 UNIFAC模型 Wilson模型 牛顿迭代法 

分 类 号：TK123[动力工程及工程热物理—工程热物理]