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Document IIF

Étude expérimentale des caractéristiques [d'écoulement] diphasique d'une solution de LiBr/H2O à travers des distributeurs d'air dans un environnement sous vide.

Experimental investigation of two-phase flow characteristics of LiBr/H2O solution through orifice plates in vacuum environment.

Auteurs : WANG S., XIE X., JIANG Y.

Type d'article : Article, Article de la RIF

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.

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Format PDF

Pages : 267-274

Disponible

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    20 €

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    Gratuit

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Détails

  • Titre original : Experimental investigation of two-phase flow characteristics of LiBr/H2O solution through orifice plates in vacuum environment.
  • Identifiant de la fiche : 30010367
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 38
  • Date d'édition : 02/2014

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