| 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上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263.15~373.15K的制冷剂/润滑油气液相平衡的测量。测量了温度为293.35?323.33K的R290的饱和蒸气压，与NIST数据库相比，最大相对误差为-0.18%。同时，测量了温度为303.35K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，本文和文献的最大相对误差分别为-0.37%和-0.76%。 |
| 关键词: 制冷剂 润滑油 气液相平衡 循环法 |
| DOI： |
| 投稿时间：2019-10-25 修订日期：2020-01-16
|
| 基金项目:佛山市海内外重点招标课题（No.2013AH100023）资助。 |
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| Development and Verification of a Vapor–liquid Equilibrium Experimental System for Refrigerants/Lubricants |
| Zhang Chaoshi,Huang Zhanfeng,Huang Chaiyi,Li Tingxun |
| (School of Intelligent Systems Engineering, Sun Yat-Sen University) |
| Abstract: |
| 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 the systematic error of 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 373.15K. 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. |
| Key words: refrigerant lubricant vapor-liquid equilibrium cycle method |
