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Vapor-liquid equilibria predictions for alternative working fluids at low and moderate pressures / Shu-Xin Hou in Industrial & engineering chemistry research, Vol. 47 N°19 (Octobre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N°19 (Octobre 2008) . - p. 7501–7508 Titre : Vapor-liquid equilibria predictions for alternative working fluids at low and moderate pressures Type de document : texte imprimé Auteurs : Shu-Xin Hou, Auteur ; Yuan-Yuan Duan, Auteur ; Xiao-Dong Wang, Auteur Année de publication : 2008 Article en page(s) : p. 7501–7508 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Working  fluids  Vapor-liquid  equilibria  Soave-Redlich-Kwong  EoS Résumé : Alternative working fluid mixtures containing hydrofluoroethers, hydrofluorocarbons, alkanes, alcohols, ketones, and esters widely used as process fluids generally exhibit azeotropes, high nonideality, and association effects. In this work, the vapor−liquid equilibria for these mixtures are predicted using a combination of the Soave−Redlich−Kwong equation of state, zero reference pressure GE−EoS mixing rules, and the UNIFAC group contribution model. A new functional group assignment strategy was developed, and the model interaction parameters between groups were obtained from selected binary vapor−liquid equilibria data to give fairly good agreement between the calculated results and the experimental data. The method is also extended to ternary systems for VLE representations in a totally predictive manner with only the molecular structures, the critical parameters, and the acentric factors of the pure components needed. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800133b [article] Vapor-liquid equilibria predictions for alternative working fluids at low and moderate pressures [texte imprimé] / Shu-Xin Hou, Auteur ; Yuan-Yuan Duan, Auteur ; Xiao-Dong Wang, Auteur . - 2008 . - p. 7501–7508. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N°19 (Octobre 2008) . - p. 7501–7508 Mots-clés : Working  fluids  Vapor-liquid  equilibria  Soave-Redlich-Kwong  EoS Résumé : Alternative working fluid mixtures containing hydrofluoroethers, hydrofluorocarbons, alkanes, alcohols, ketones, and esters widely used as process fluids generally exhibit azeotropes, high nonideality, and association effects. In this work, the vapor−liquid equilibria for these mixtures are predicted using a combination of the Soave−Redlich−Kwong equation of state, zero reference pressure GE−EoS mixing rules, and the UNIFAC group contribution model. A new functional group assignment strategy was developed, and the model interaction parameters between groups were obtained from selected binary vapor−liquid equilibria data to give fairly good agreement between the calculated results and the experimental data. The method is also extended to ternary systems for VLE representations in a totally predictive manner with only the molecular structures, the critical parameters, and the acentric factors of the pure components needed. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800133b