Simulation on Vapor Liquid Equilibria of R1234yf/R290/R134a Ternary System

Qin Yanbin; Zhang Hua; Wu Yinlong

doi:10.3969/j.issn.0253-4339.2017.05.029

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Simulation on Vapor Liquid Equilibria of R1234yf/R290/R134a Ternary System

更新时间：2024-07-18

- Simulation on Vapor Liquid Equilibria of R1234yf/R290/R134a Ternary System
- Journal of Refrigeration Vol. 38, Issue 5, (2017)
- 作者机构：
  
  上海理工大学制冷与低温工程研究所
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0253-4339.2017.05.029
  CLC：
- Published：2017
- 稿件说明：
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Qin Yanbin, Zhang Hua, Wu Yinlong. Simulation on Vapor Liquid Equilibria of R1234yf/R290/R134a Ternary System[J]. Journal of refrigeration, 2017, 38(5).
DOI：

Qin Yanbin, Zhang Hua, Wu Yinlong. Simulation on Vapor Liquid Equilibria of R1234yf/R290/R134a Ternary System[J]. Journal of refrigeration, 2017, 38(5). DOI： 10.3969/j.issn.0253-4339.2017.05.029.

摘要

本文从理论方面研究了混合制冷剂的相平衡特性，基于Peng-Robinson (PR)状态方程与Wong-Sandler (WS)混合法则，结合Predictive Soave Redlich Kwong (PSRK)方程中使用的UNIFAC基团贡献法，构建了混合物气液相平衡预测模型(PRWS-UNIFAC-PSRK)。结果表明：二元混合物R32/R1234yf的压力及气相质量分数的模拟结果与实验值偏差分别在±2.5%和±0.02内；三元混合物R134a/R1234yf/R600a的压力及气相组分质量分数计算值与实验数据的偏差基本在±3%和±0.04内；建立了R1234yf/R290/R134a系的三元相平衡图，当质量分数在0.25/0.7/0.05左右时存在共沸点。通过采用多参数状态方程，改进活度系数模型，获取更为准确的二元相互作用系数，可进一步提高模型的预测精度。

Abstract

Based on the Peng Robinson (PR) equation of state combined with the Wong-Sandler (WS) mixing rule

and combined with the UNIFAC group contribution method used in the Predictive Soave Redlich Kwong (PSRK) equation

a gas-liquid equilibrium prediction model of the mixture (PRWS-UNIFAC-PSRK) was constructed. The results indicate that for the R32/R1234yf binary mixture

the deviations between the experimental and calculated data for the pressure and vapor phase mass fraction are within ±2.5% and 0.02

respectively. For R134a/R1234yf/R600a ternary mixture

the relative deviation between the measured pressures and calculated results are within ±3% and the absolute deviation of vapor phase mass fraction is within ±0.04. In ternary phase equilibria diagram of R1234yf/R290/R134a

the mass fraction of R1234yf/R290/R134a at around 0.25/0.7/0.05 has an azeotropic point. The VLE (vapor liquid equilibria) prediction model can be further improved by using the multi-parameter equation of states

improving the activity coefficient models and obtaining more accurate binary interaction coefficient.

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