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Enquête sur le transfert de chaleur et la chute de pression dans un échangeur de chaleur concentrique à entrée en spirale.

Investigation of heat transfer and pressure drop in a concentric heat exchanger with a snail entrance.

Auteurs : DURMUS A., ESEN M.

Type d'article : Article

Résumé

In the study, in order to increase heat transfer in concentric double-pipe heat exchangers by passive method, a snail mounted at inlet of the inner pipe and assumed as acting as a swirl generator was used. In the experimental set-up, cold air in ambient conditions was passed through the inner pipe while hot water was flowing through the annulus. The effects of a snail on the heat transfer and pressure drop were investigated for parallel and counterflow. An increase in Nusselt number of up to 120% was obtained in the swirl flow for counterflow and 45° swirling angle. The swirl flow effect of the snail had little effect on pressure drop, for a high increase in heat transfer.

Détails

  • Titre original : Investigation of heat transfer and pressure drop in a concentric heat exchanger with a snail entrance.
  • Identifiant de la fiche : 2003-1207
  • Langues : Anglais
  • Source : Applied Thermal Engineering - vol. 22 - n. 3
  • Date d'édition : 02/2002

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