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Transfert de chaleur lors de la condensation et chute de pression à l'intérieur des tubes lisses aplatis avec différents rapports longueur-diamètre.

Condensation heat transfer and pressure drop in flattened smooth tubes having different aspect ratios.

Numéro : pap. 2580

Auteurs : KIM N. H., LEE E. J., BYUN H. W.

Résumé

In this study, condensation heat transfer coefficients of R410A were obtained in flattened stainless tubes made from 5.0 mm inner diameter round tubes. The test range covered saturation temperature 45?, heat flux 10 kW/m2, mass flux 100~400 kg/m2s and quality 0.2~0.8. Results showed the effect of aspect ratio on condensation heat transfer coefficient was dependent on the flow pattern. For annular flow, the heat transfer coefficient increased as the aspect ratio increased. For stratified flow, however, the reverse was true. The pressure drop increased as aspect ratio increased. Existing correlations adequately predicted the heat transfer coefficients and pressure drops of the flattened tubes.

Documents disponibles

Format PDF

Pages : 10 p.

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

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

Détails

  • Titre original : Condensation heat transfer and pressure drop in flattened smooth tubes having different aspect ratios.
  • Identifiant de la fiche : 30006340
  • Langues : Anglais
  • Source : 2012 Purdue Conferences. 14th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 16/07/2012

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