制冷剂/润滑油气液相平衡实验系统的研制与验证  

Development and Verification of a Vapor-liquid Equilibrium Experimental System for Refrigerants/Lubricants

作　　者：张朝仕 黄展枫 黄钗宜 李廷勋 Zhang Chaoshi;Huang Zhanfeng;Huang Chaiyi;Li Tingxun(School of Intelligent Systems Engineering,Sun Yat-Sen University,Guangzhou,510006,China)

机构地区：[1]中山大学智能工程学院,广州510006

出　　处：《制冷学报》2020年第5期42-47,共6页Journal of Refrigeration

摘　　要：针对制冷剂/润滑油相平衡测量,本文研制了一套基于循环法的高精度制冷剂/润滑油气液相平衡实验系统。该实验系统在循环系统中安装了可拆卸的样品罐,将循环法与称重分析法结合,避免了等体积饱和法由于理想假设而产生的系统误差,可适用于温度范围为263.15~373.15 K的制冷剂/润滑油气液相平衡的测量。测量了温度为293.35~323.33 K的R290的饱和蒸气压,与NIST数据库相比,最大相对误差为-0.18%;测量了温度为303.35 K的R290和角鲨烷的相平衡,并使用Aspen Plus中的PR方程结合单流体的van der Waals混合规则对实验结果及文献值进行了关联,最大相对误差分别为-0.37%和-0.76%。To measure the vapor-liquid equilibrium(VLE)of refrigerants/lubricants,a refrigerants/lubricants VLE experimental system with high precision was developed based on the cycle method.The circulation system was equipped with a detachable sample tank.It combined the cycle method and weighing method and eliminated systematic error of the isochoric saturation method due to the assumption.Furthermore,it could measure the VLE of refrigerants/lubricants at a temperature range of 263.15 K to 373.15 K.The saturated vapor pressure of R290 was measured from 293.35 K to 323.33 K.The relative deviation of the pressure was less than-0.18%when compared to NIST REFPROP9.1.Additionally,the phase equilibrium values of R290 and squalane were measured at 303.35 K.The experimental data and literature data were correlated with the Peng-Robinson(PR)equation of state and one-fluid van der Waals mixing rules in Aspen Plus,and the results indicated maximum relative deviation of pressure of-0.37%and0.76%,respectively.

关 键 词：制冷剂 润滑油 气液相平衡 循环法 

分 类 号：TB612[一般工业技术—制冷工程] TB64