含HFO二元混合工质汽液相平衡性质研究  

Study of vapor-liquid equilibria for binary mixtures containing HFO

作　　者：赵雄飞 李梦丹 臧冬云 ZHAO Xiong-fei;LI Meng-dan;ZANG Dong-yun(College of Electric and Power Engineering,Taiyuan University of Technology,Taiyuan 030024,Shanxi Province,China)

机构地区：[1]太原理工大学电气与动力工程学院,山西太原030024

出　　处：《化学工程》2018年第9期53-57,共5页Chemical Engineering(China)

摘　　要：为了提高环保替代混合制冷工质相平衡数据的计算精度,文中收集了公开发表的7种HFOs/HFCs及6种HFOs/HCs 2类二元混合工质的气液相平衡性质实验数据,分别采用PR方程+VDW混合法则、PR方程+MHV1混合法则+Wilson模型对2类混合工质的气液相平衡性质进行了非线性优化,结果表明:对于HFOs/HFCs,PR+MHV1+Wilson模型计算值与实验结果的压力平均相对偏差为0. 28%,汽相组分的平均绝对偏差为0. 003 5,PR+VDW模型的结果分别为0. 30%和0. 003 6;对于HFOs/HCs,PR+MHV1+Wilson模型计算值与实验结果的压力平均相对偏差为0. 25%,汽相组分的平均绝对偏差为0. 003 7,PR+VDW模型的结果分别为0. 55%和0. 004 8。可见:相比于PR+VDW模型,PR+MHV1+Wilson模型对HFOs/HFCs混合工质的汽液相平衡性质计算精度提升有限,对HFOs/HCs类工质则可显著提升计算精度。In order to improve the performance of the vapor-liquid equilibria model for binary mixture containing HFO,vapor-liquid equilibrium data were collected for seven binary HFOs/HFCs and six binary HFOs/HCs system.The experimental VLE data were fitted using PR equation of state together with VDW mixing rule and PR equation of state together with MHV1 mixing rule and Wilson model for these 13 systems.For HFOs/HFCs system,the absolute average deviations in terms of saturated pressure and vapor phase composition between experimental data and PR+MHV1+Wilson model were 0.28%and 0.003 5,respectively,the deviations between experimental data and PR+VDW model were 0.30%and 0.003 6,respectively.For HFOs/HCs system,the absolute average deviations in terms of saturated pressure and vapor phase composition between experimental data and PR+MHV1+Wilson model were 0.25%and 0.003 7,respectively,the deviations between experimental data and PR+VDW model were 0.55%and 0.004 8,respectively.The results show that the VLE calculation accuracy is improved more significantly by PR+MHV1+Wilson model for HFOs/HCs system than HFOs/HFCs system,compared to PR+VDW model.

关 键 词：汽液相平衡 PR状态方程 MHV1混合法则 HFCS HCS HFOs 

分 类 号：TB612[一般工业技术—制冷工程]