Documents disponibles écrits par cet auteur

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

Performance comparison between enthalpy recovery wheels and dehumidification wheels / Rang, Tu in International journal of refrigeration, Vol. 36 N° 8 (Décembre 2013) 

Public ISBD [article]  in International journal of refrigeration > Vol. 36 N° 8 (Décembre 2013) . - pp. 2308-2322 Titre : Performance comparison between enthalpy recovery wheels and dehumidification wheels Titre original : Comparaison des performances entre les roues de récupération d'enthalpie et les roues déshydratantes Type de document : texte imprimé Auteurs : Rang, Tu, Auteur ; Xiao-Hua, Liu, Auteur ; Yi, Jiang, Auteur Année de publication : 2014 Article en page(s) : pp. 2308-2322 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Desiccant  wheel;  dehumidification;  enthalpy;  recovery;  speed;  performance Résumé : A mathematical model of desiccant wheels is established and validated by experimental results. The different effects of substrate, air mixing, and rotation speed on the performance of enthalpy recovery wheels and dehumidification wheels are analyzed. Substrate with high heat capacity and low heat conductivity is recommended for enthalpy recovery wheels, while substrate with low heat capacity and low heat conductivity is suitable for dehumidification wheels. Air mixing should be considered in evaluating recovery wheels' performance but can be ignored for dehumidification wheels. For recovery wheels without considering air mixing, higher the rotation speed, higher the recovery efficiency; when considering air mixing, the optimal rotation speed is lower than the corresponding rotation speed at a 5% air mixing rate. There also exists an optimal rotation speed to obtain better dehumidification performance for dehumidification wheels. Meanwhile, the reasons behind the discrepancies between recovery wheels and dehumidification wheels are discussed. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713001795 [article] Performance comparison between enthalpy recovery wheels and dehumidification wheels = Comparaison des performances entre les roues de récupération d'enthalpie et les roues déshydratantes [texte imprimé] / Rang, Tu, Auteur ; Xiao-Hua, Liu, Auteur ; Yi, Jiang, Auteur . - 2014 . - pp. 2308-2322. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 36 N° 8 (Décembre 2013) . - pp. 2308-2322 Mots-clés : Desiccant  wheel;  dehumidification;  enthalpy;  recovery;  speed;  performance Résumé : A mathematical model of desiccant wheels is established and validated by experimental results. The different effects of substrate, air mixing, and rotation speed on the performance of enthalpy recovery wheels and dehumidification wheels are analyzed. Substrate with high heat capacity and low heat conductivity is recommended for enthalpy recovery wheels, while substrate with low heat capacity and low heat conductivity is suitable for dehumidification wheels. Air mixing should be considered in evaluating recovery wheels' performance but can be ignored for dehumidification wheels. For recovery wheels without considering air mixing, higher the rotation speed, higher the recovery efficiency; when considering air mixing, the optimal rotation speed is lower than the corresponding rotation speed at a 5% air mixing rate. There also exists an optimal rotation speed to obtain better dehumidification performance for dehumidification wheels. Meanwhile, the reasons behind the discrepancies between recovery wheels and dehumidification wheels are discussed. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713001795