HC-290+HFC-134a体系汽液平衡的测量与关联  

Measurement and correlation of vapor-liquid equilibria for HC-290+HFC-134a system

作　　者：唐晓博 杨志强[1,2,3] 寇联岗 曾纪珺[1,2] 韩升 吕剑[1,2] TANG Xiao-bo;YANG Zhi-qiang;KOU Lian-gang;ZENG Ji-jun;HAN Sheng;LYU Jian(State Key Laboratory of Fluorine & Nitrogen Chemicals,Xi′an 710065,Shaanxi Province,China;Xi′an Modern Chemistry Research Institute,Xi′an 710065,Shaanxi Province,China;Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education,School of Energy and Power Engineering,Xi′an Jiaotong University,Xi′an 710049,Shaanxi Province,China)

机构地区：[1]氟氮化工资源高效开发与利用国家重点实验室,陕西西安710065 [2]西安近代化学研究所,陕西西安710065 [3]西安交通大学能源与动力工程学院热流科学与工程教育部重点实验室,陕西西安710049

出　　处：《化学工程》2019年第4期40-44,64,共6页Chemical Engineering(China)

摘　　要：HC-290/HFC-134a混合制冷剂具有在空调制冷系统中替代R22的应用潜力。混合制冷剂的汽液平衡性质在工程应用中具有重要意义,然而,HC-290/HFC-134a混合制冷剂在285—313 K温度区间的汽液平衡数据还鲜有报道。文中采用气相循环法测量了HC-290+HFC-134a二元体系在273.14—313.15 K的等温汽液平衡,选用Peng-Robinson(PR)状态方程结合van der Waals(vdW)混合规则对实验数据进行了关联计算,并推算了275.00,283.15和285.00 K的汽液平衡数据,与文献值进行对比,获得了较好的一致性。实验结果表明:HC-290+HFC-134a体系在实验温度范围内具有很强的最高共沸,且共沸组成和共沸压力随温度的升高而增大。此研究为HC-290+HFC-134a体系的工程应用提供了数据参考,也为汽液平衡数据库补充新的内容。The HFC-134 a+HC-290 mixed refrigerant has good potential to be applied in air conditioner system as an alternative refrigerant of R22 The property of vapor liquid equilibrium(VLE)is significant for the industrial application of refrigerant blend.However,the literature data has been rarely reported for this binary mixture in the temperature range of 285-313 K.In this work,the isothermal VLE data for HFC-134 a+HC-290 system was measured from 273.14 K to 313.15 K by vapor phase circulation method.The Peng-Robinson(PR)state equation combined with van der Waals(vdW)mixing rule was used to correlate experimental data and to predict VLE data at 275.00,283.15 and 285.00 K.The predicted data has a good consistence with the literature values.The result shows that HFC-134 a+HC-290 system has very strong positive azeotrope in the experimental temperature range,and both the azeotropic compositon and azeotropic pressure increase with the rise of temperature.This work provides important data reference for industrial application of HC-290+HFC-134 a system,and also provides new VLE data for chemical database.

关 键 词：四氟乙烷 丙烷 混合制冷剂 汽液平衡 测量 

分 类 号：TK121[动力工程及工程热物理—工程热物理] TK123[动力工程及工程热物理—热能工程]