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Experimental investigation of two-phase flow characteristics of LiBr/H2O solution through orifice plates in vacuum environment / Sheng Wang in International journal of refrigeration, Vol. 38 (Février 2014) 

Public ISBD [article]  in International journal of refrigeration > Vol. 38 (Février 2014) . - pp. 267–274 Titre : Experimental investigation of two-phase flow characteristics of LiBr/H2O solution through orifice plates in vacuum environment Titre original : Etude expérimentale des caractéristiques diphasiques d'une solution de LiBr/H2O à travers des distributeurs d'air dans un environnement sous vide Type de document : texte imprimé Auteurs : Sheng Wang, Auteur ; Xiaoyun Xie, Auteur ; Yi, Jiang, Auteur Année de publication : 2014 Article en page(s) : pp. 267–274 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Two-phase  flow;  LiBr/H2O  solution;  Choked  flow;  Orifice  plate;  Vacuum Résumé : A new type of multi-stage elementary unit for generating and condensing processes in absorption heat pumps was introduced. One stage of the elementary unit was built, in which the LiBr/H2O solution was concentrated by flash evaporation when flowing through an orifice plate to the generating space. Experiments were carried out to study the flow characteristics of LiBr/H2O solution through an orifice plate in generating processes. The experimental results showed that the reduction of the mass flow rate of the two-phase flow reached a maximum of 24.5%. The mass fraction of gas of the two-phase flow was proportional to its superheat. When the mass transfer pressure difference was higher than 7 kPa or the mass fraction of gas was larger than 0.70%, the flow was choked, and the flow coefficient was reduced as the mass fraction of gas increased, reaching a minimum value of 0.64. A regression model for the flow coefficient of the two-phase LiBr/H2O solution was obtained. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002417 [article] Experimental investigation of two-phase flow characteristics of LiBr/H2O solution through orifice plates in vacuum environment = Etude expérimentale des caractéristiques diphasiques d'une solution de LiBr/H2O à travers des distributeurs d'air dans un environnement sous vide [texte imprimé] / Sheng Wang, Auteur ; Xiaoyun Xie, Auteur ; Yi, Jiang, Auteur . - 2014 . - pp. 267–274. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 38 (Février 2014) . - pp. 267–274 Mots-clés : Two-phase  flow;  LiBr/H2O  solution;  Choked  flow;  Orifice  plate;  Vacuum Résumé : A new type of multi-stage elementary unit for generating and condensing processes in absorption heat pumps was introduced. One stage of the elementary unit was built, in which the LiBr/H2O solution was concentrated by flash evaporation when flowing through an orifice plate to the generating space. Experiments were carried out to study the flow characteristics of LiBr/H2O solution through an orifice plate in generating processes. The experimental results showed that the reduction of the mass flow rate of the two-phase flow reached a maximum of 24.5%. The mass fraction of gas of the two-phase flow was proportional to its superheat. When the mass transfer pressure difference was higher than 7 kPa or the mass fraction of gas was larger than 0.70%, the flow was choked, and the flow coefficient was reduced as the mass fraction of gas increased, reaching a minimum value of 0.64. A regression model for the flow coefficient of the two-phase LiBr/H2O solution was obtained. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002417