Partager

Document IIF

Performance d'un système à absorption : effet d'un additif et de la rugosité de tubes micro-rainurés sur le transfert de chaleur.

The effect of heat transfer additive and surface roughness of micro-scale hatched tubes on absorption performance.

Auteurs : PARK C. W., CHO H. C., KANG Y. T.

Type d'article : Article, Article de la RIF

Résumé

The objectives of this study were to investigate the effect of heat transfer additive and surface roughness of micro-scale hatched tubes on the absorption performance and to provide guidelines for absorber design. Two different micro-scale hatched tubes and a plain tube are tested to quantify the effect of the surface roughness on the absorption performance. The roughness of the micro-scale hatched tubes ranges 0.39-6.97 µm. The working fluid was H2O/LiBr solution with inlet concentration of 55, 58 and 61 wt.% of LiBr. Normal Octanol with a concentration of 400 ppm was used as the heat transfer additive. The absorber heat exchanger consists of 24 horizontal tubes in a column, liquid distributor at the liquid inlet and a liquid reservoir at the bottom of the absorber. The effect of the heat transfer additive on the heat transfer rate is found to be more significant in the plain tube than that in the micro-scale hatched tubes. It was found that the absorption performance for the micro-hatched tube with the heat transfer additive becomes up to 4.5 times higher than that for the plain tube without a heat transfer additive. It was concluded that the heat transfer enhancement by the heat transfer additive was more significant than that obtained using micro-scale surface treatment.

Documents disponibles

Format PDF

Pages : 264-270

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 : The effect of heat transfer additive and surface roughness of micro-scale hatched tubes on absorption performance.
  • Identifiant de la fiche : 2004-1070
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 27 - n. 3
  • Date d'édition : 05/2004

Liens


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

Indexation