Partager

Document IIF

Corrélation expérimentale du transfert de chaleur lors de l'absorption par film tombant sur tubes micro-ondulés.

Experimental correlation of falling film absorption heat transfer on micro-scale hatched tubes.

Auteurs : PARK C. W., KIM S. S., CHO H. C., et al.

Type d'article : Article, Article de la RIF

Résumé

The objectives of this paper were to investigate the effect of surface roughness of micro-hatching tubes on the absorption performance and to develop an experimental correlation of Nusselt number as a function of the roughness. Two different micro-scale hatched tubes and a bare tube were tested to quantify the effect of the surface roughness on the absorption performance. The roughness of the micro-scale hatched tubes ranges from 0.386 to 11.359 µm. The working fluid is a H2O/LiBr solution with inlet concentrations of 55, 58 and 61 wt.% of LiBr. The absorber heat exchanger consists of 24 horizontal tubes in a column, a liquid distributor at the liquid inlet and a liquid reservoir at the bottom of the absorber. It was found that the absorption performance of micro-hatching tubes was improved up to twofold compared with the bare tube. An experimental correlation of the Nusselt number was developed as a function of the film Reynolds number and the roughness, with an error band of ±25%.

Documents disponibles

Format PDF

Pages : 758-763

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 : Experimental correlation of falling film absorption heat transfer on micro-scale hatched tubes.
  • Identifiant de la fiche : 2004-1716
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 26 - n. 7
  • Date d'édition : 11/2003

Liens


Voir d'autres articles du même numéro (12)
Voir la source

Indexation