二元制冷剂R134a＋DME在温度范围（253.15~273.15）K的汽液相平衡研究  

Isothermal Vapor-Liquid Equilibrium of Binary Mixture(1,1,1,2-Tetrafluoroethane+DME) at Temperature Range From(253.15 to 273.15)K

作　　者：高赞军[1] 管文洁[1] 杨璋璋 吕岩[1] 韩晓红[1] 陈光明[1] 

机构地区：[1]浙江大学制冷与低温研究所,杭州310027

出　　处：《工程热物理学报》2016年第1期29-32,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51176166);浙江省制冷空调产业技术创新战略联盟(No.2010LM108)

摘　　要：本文采用汽液双循环法测量了新型环保制冷剂R134a＋DME在（253.15~273.15）K时的汽液相平衡数据。所测实验数据采用PR＋LCVM＋Wilson模型进行了关联,汽相组分的平均绝对误差绝对值为0.0043,最大绝对误差绝对值为0.0222;体系压力的平均相对误差绝对值为0.65%,最大相对误差绝对值为1.05%。关联结果和实验数据一致性较好,说明此模型能很好地描述该体系在实验条件下的汽液相平衡数据。从实验结果发现,R134a＋DME是一种共沸制冷剂,处于共沸点时R134a摩尔组分0.4左右,而且该混合物在整体组分变化范围内的温度滑移也非常小。Vapor-liquid equilibrium data（VLE） of the binary mixed refrigerant of 1,1,1,2-tetrafluoroethane（R134a） ＋ DME were measured by a recirculation apparatus at temperature range of（253.15 to 273.15） K.The experimental data were correlated by PR＋LCVM＋Wilson model.The average absolute vapor composition deviation is within 0.0043,and its largest absolute deviation is 0.0222;the average absolute relative pressure deviation is 0.65%,and its largest absolute relative pressure deviation is 1.05%.The correlation results have a good agreement with the experimental data.In addition,the results reveal that there is an azeotropic point in the binary refrigerant（the mole fraction of R134 a is around 0.4）,and their temperature glides are very small.

关 键 词：R134A DME 汽液相平衡 共沸点 

分 类 号：TK123[动力工程及工程热物理—工程热物理]