二氟甲烷/四氟乙烷/1,1-二氟乙烷与N,N-二甲基甲酰胺/N,N-二甲基乙酰胺/二甘醇二甲醚工质对体系热力学分析  

Thermodynamic analysis of working pairs of the refrigerants difluoromethane,1,1,1,2-tetrafluoroethane or 1,1-difluoroethane with the organic solvents N,N-dimethylformamide, N,N-dimethylacetamide or bis( 2-methoxyethyl) ether

作　　者：潘春晖[1] 邓如雷 郑丹星[1] 李新如[1] 孟学林[1] 

机构地区：[1]北京化工大学化学工程学院,北京100029

出　　处：《北京化工大学学报（自然科学版）》2013年第6期5-9,共5页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：国家自然科学基金(50890184);国家"973"计划(2010CB227304)

摘　　要：在实验测定了二氟甲烷(R32)-二甘醇二甲醚(DMEDEG)、R32-N,N-二甲基乙酰胺(DMAC)、1,1-二氟乙烷(R152a)-N,N-二甲基甲酰胺(DMF)、R152a-DMAC和R152a-DMEDEG 5个体系的气液相平衡数据的基础上,补充了文献中R32-DMF、四氟乙烷(R134a)-DMF和R134a-DMEDEG 3个体系的数据。采用PR方程为关联模型,比较了R32/R134/R152与DMF/DMAC/DMEDEG这8个工质对体系的气液相平衡行为。从化学结构出发,用氢键理论分析了这8个工质对的热力学行为,并结合制冷剂和吸收剂的热物性,解释了吸收制冷循环性能系数COP随发生温度的变化规律。Equilibrium data for the five binary systems difluoromethane （R32）-bis（2-methoxyethyl）ether （DME- DEG）, R32- N, N-dimethylacetamide （ DMAC ）, 1,1 -difluoroethane （R152a） - N, N-dimethylformamide （ DMF）, R152a-DMAC and R152a-DMEDEG have been compared with literature data for the three binary systems R32- DMF, 1,1,1,2-tetrafluoroethane （R134a）-DMF and R134a-DMEDEG. All the binary systems were regressed with the Peng-Robinson （PR） equation of state. The vapor-liquid equilibrium behaviors of the eight binary sys- tems were compared. The thermal behaviors of all eight binary systems were analyzed in terms of hydrogen bonding theory on the basis of their chemical structures. The coefficient of absorption refrigeration cycle （COP） changed with the temperature difference, and this behavior was explained in terms of the thermophysical properties of the re- frigerants R32, R134a and R152a and the organic solvents.

关 键 词：工质对气液相平衡 模型化 Raoult定律 氢氟烃吸收制冷循环 

分 类 号：TQ013[化学工程] O642[理学—物理化学]