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Document IIF

Modélisation du régime stable et du régime transitoire des évaporateurs à détente sèche.

Distributed steady and dynamic modelling of dry-expansion evaporators.

Auteurs : JIA X., TSO C. P., JOLLY P., WONG Y. W.

Type d'article : Article, Article de la RIF

Résumé

A general distributed parameter model is presented to describe both steady and dynamic behaviours of dry-expansion evaporators. The homogeneous and three different non-homogeneous two-phase flow models are used to evaluate the impact of different flow models on the accuracy of the simulation. The experimental work was carried out on a full-scale refrigeration system with R134a as the working fluid and without frost formation at the evaporator. Comparison between the modelling and experimental measurements shows that the drift flux flow models give satisfactory predictions. The simulation results indicate that an even air temperature distribution off the evaporator may be obtained by controlling liquid dry-out point at the two ends of the coil. The study also indicates that the counterflow configuration provides a higher heat exchange efficiency with a slower transient response compared with the cocurrent-flow configuration.

Documents disponibles

Format PDF

Pages : 126-136

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Distributed steady and dynamic modelling of dry-expansion evaporators.
  • Identifiant de la fiche : 1999-2225
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 22 - n. 2
  • Date d'édition : 03/1999

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