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Analyse numérique et expérimentale d'échangeurs de chaleur elliptiques à tubes ailetés sous des conditions de formation de buée.

Numerical and experimental analysis of elliptic finned-tube heat exchangers under misted conditions.

Auteurs : CHIU Y. W., LIN Y. X., JANG J. Y.

Résumé

The numerical and experimental analysis was carried out to study the thermal-hydraulic characteristics in elliptical finned-tube heat exchanger under the dry and air/water spray cooled system. Three kinds of major/minor axis ratios were examined for the elliptic finned-tube heat exchangers and the results were also compared with the corresponding circular finned-tube having the same perimeter. The numerical results for the pressure and heat transfer coefficient at various inlet frontal velocities (1-5 m/s) are shown and compared with the available experimental data. The numerical results indicated that the pressure drop of circular finned-tube heat exchanger is 3 times that of the elliptic finned-tube heat exchanger, while the heat transfer coefficient of the circular finned-tube is 1.51 times that of the elliptic finned-tube. The heat transfer coefficient per unit of pressure drop for elliptic finned-tube is 1.6-2.5 times of circular finned-tube. When the air/water spray system is applied, the heat transfer could increase up to more than 30%.

Détails

  • Titre original : Numerical and experimental analysis of elliptic finned-tube heat exchangers under misted conditions.
  • Identifiant de la fiche : 2008-2444
  • Langues : Anglais
  • Source : Clima 2007. WellBeing Indoors. Proceedings of the 9th REHVA World Congress [CD-ROM + Abstract book].
  • Date d'édition : 10/06/2007

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