Partager

Document IIF

Impact de la configuration de l'entrée sur la distribution du frigorigène en écoulement parallèle dans un échangeur de chaleur à minicanaux.

Effect of inlet configuration on the refrigerant distribution in a parallel flow minichannel heat exchanger.

Auteurs : KIM N. H., KIM D. Y., BYUN H. W.

Type d'article : Article, Article de la RIF

Résumé

The refrigerant R134a flow distribution was experimentally studied for a round header/ten flat tube test section simulating a brazed aluminum heat exchanger. Three different inlet configurations (parallel, normal, vertical) were investigated. Tests were conducted with downward flow for mass flux from 70 to 130 kg/m2.s and quality from 0.2 to 0.6. Tubes were flush-mounted in the test section, with no protrusion into the header. It is shown that normal and vertical inlet yielded similar flow distribution. As mass flux or quality increased, however, better results were obtained for normal inlet configuration. The flow distribution was worst for the parallel inlet configuration. Possible explanation is provided based on flow visualization results. Correlations were developed to predict the fraction of liquid or gas taken off by downstream channel as a function of header gas Reynolds number at immediate upstream.

Documents disponibles

Format PDF

Pages : 1209-1221

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 : Effect of inlet configuration on the refrigerant distribution in a parallel flow minichannel heat exchanger.
  • Identifiant de la fiche : 30000958
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 34 - n. 5
  • Date d'édition : 08/2011

Liens


Voir d'autres articles du même numéro (14)
Voir la source

Indexation