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Journal of Thermal Science

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2024 , Vol. 33 >Issue 3: 1161 - 1173

DOI: https://doi.org/10.1007/s11630-024-1956-6

A New Excess Free Energy Mixing Rule for Representing Vapor-Liquid Equilibria of Mixed Refrigerants

  • YE Gongran ,
  • FANG Yibo ,
  • YAN Yuhao ,
  • LIU Ying ,
  • OUYANG Hongsheng ,
  • GUO Zhikai ,
  • HAN Xiaohong
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  • 1. Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang Province, Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou 310027, China
    2. State Key Lab for Fluorine Greenhouse Gases Replacement and Control Treatment, Zhejiang Research Institute of Chemical Industry, Hangzhou 310014, China
    3. Zhejiang Key Laboratory of Clean Energy and Carbon Neutrality, Zhejiang University, Hangzhou 310027, China

网络出版日期: 2024-04-30

基金资助

This work has been supported by the Nation Natural Science Foundation of China (Grant No. 52076185) and the Natural Science Foundation of Zhejiang Province (No. LZ19E060001).

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Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2024
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A New Excess Free Energy Mixing Rule for Representing Vapor-Liquid Equilibria of Mixed Refrigerants

  • YE Gongran ,
  • FANG Yibo ,
  • YAN Yuhao ,
  • LIU Ying ,
  • OUYANG Hongsheng ,
  • GUO Zhikai ,
  • HAN Xiaohong
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  • 1. Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang Province, Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou 310027, China
    2. State Key Lab for Fluorine Greenhouse Gases Replacement and Control Treatment, Zhejiang Research Institute of Chemical Industry, Hangzhou 310014, China
    3. Zhejiang Key Laboratory of Clean Energy and Carbon Neutrality, Zhejiang University, Hangzhou 310027, China

Online published: 2024-04-30

Supported by

This work has been supported by the Nation Natural Science Foundation of China (Grant No. 52076185) and the Natural Science Foundation of Zhejiang Province (No. LZ19E060001).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2024
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摘要

准确的混合法则对于混合制冷剂的汽液平衡(VLE)研究非常重要。在这项工作中，一种在零压力条件下的新的超额吉布斯自由能混合法则(MRv)被提出。MRv明确采用了变液体摩尔体积。MRv的适用温度范围可以通过经验方法来估计高温下组分的液体摩尔体积来扩展。在两种不同的参考压力下，本工作选取了三种混合法则：修正的Huron-Vidal混合法则（MHV1）、Wong-Sandler混合法则（WS）以及MRv，来比较37种混合制冷剂的VLE计算结果。结果表明，MRv在组分和压力计算上与MHV1和WS具有相似的精度。此外，使用MRv得到的37种混合制冷剂的平均超额吉布斯自由能(0.0013)远低于使用MHV1(0.0078)和WS(0.0809)的结果，这对于设计和优化使用混合制冷剂的相关系统具有很高的参考价值。

关键词： mixed refrigerant; vapor liquid equilibrium (VLE); mixing rule; reproducibility

本文引用格式

YE Gongran , FANG Yibo , YAN Yuhao , LIU Ying , OUYANG Hongsheng , GUO Zhikai , HAN Xiaohong . A New Excess Free Energy Mixing Rule for Representing Vapor-Liquid Equilibria of Mixed Refrigerants[J]. 热科学学报, 2024 , 33(3) : 1161 -1173 . DOI: 10.1007/s11630-024-1956-6

Abstract

A suitable mixing rule is important for vapor liquid equilibrium (VLE) investigations for mixed refrigerants. In this work, a new excess free energy mixing rule (MRv) was proposed at zero pressure based on the linear relationship between dimensionless parameter 1/(u–1) and α. MRv mixing rule was explicit adopted variable liquid molar volume. The applicable temperature range of MRv could be extended by means of an empirical method to estimate the liquid molar volume for components at high temperatures. Three mixing rules modified Huron-Vidal mixing rule (MHV1), Wong-Sandler mixing rule (WS), and MRv at two reference pressures were used to compare the VLE data in the calculation of 37 mixed refrigerants. Results demonstrated that MRv had a relatively similar accuracy to MHV1 and WS for component and pressure calculation. Moreover, the average excess Gibbs free energy using the MRv mixing rule for the 37 selected mixed refrigerants (0.0013) was much lower than those using the MHV1 (0.0078) and WS (0.0809) mixing rules, which was very valuable for the design and optimization of thermodynamic systems using mixed refrigerants.

Key words： mixed refrigerant; vapor liquid equilibrium (VLE); mixing rule; reproducibility

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