| R1234yf/R290/R134a系气液相平衡的模拟 |
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| 引用本文： | 秦延斌,张华,吴银龙. R1234yf/R290/R134a系气液相平衡的模拟[J]. 制冷学报, 2017, 0(5): 29-40 |
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| 作者姓名： | 秦延斌 张华 吴银龙 |
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| 作者单位： | 上海理工大学制冷与低温工程研究所,上海理工大学制冷与低温工程研究所,上海理工大学制冷与低温工程研究所 |
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| 基金项目： | 国家自然科学基金(5117612)资助项目。 |
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| 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0.25/0.70/0.05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。
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| 关 键 词： | 气液相平衡；R1234yf；计算机模拟；共沸点 |
| 收稿时间： | 2017-01-06 |
Simulation on Vapor Liquid Equilibria of R1234yf/R290/R134a Ternary System |
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| Qin Yanbin,Zhang Hua and Wu Yinlong. Simulation on Vapor Liquid Equilibria of R1234yf/R290/R134a Ternary System[J]. Journal of Refrigeration, 2017, 0(5): 29-40 |
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| Authors: | Qin Yanbin Zhang Hua Wu Yinlong |
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| Affiliation: | Institute of Refrigeration and Cryogenic Engineering, University of Shanghai for Science and Technology,Institute of Refrigeration and Cryogenic Engineering, University of Shanghai for Science and Technology and Institute of Refrigeration and Cryogenic Engineering, University of Shanghai for Science and Technology |
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| 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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| Keywords: | vapor liquid equilibria R1234yf computer simulation azeotropic point |
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