Simulation on Vapor Liquid Equilibria of R1234yf/R290/R134a Ternary System
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 constr...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Journal of Refrigeration Magazines Agency Co., Ltd.
2017-01-01
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| Series: | Zhileng xuebao |
| Subjects: | |
| Online Access: | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2017.05.029 |
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| Summary: | 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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| ISSN: | 0253-4339 |