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A propos de l'analogie de la chaleur et de la masse d'un échangeur de chaleur à tubes ailetés.

On the heat and mass analogy of fin-and-tube heat exchanger.

Auteurs : WANG C. C.

Type d'article : Article

Résumé

This study examines the heat and mass analogy of the fin-and-tube heat exchanger under dehumidifying process. A total of 36 fin-and- tube heat exchangers having plain fin geometry are experimentally examined. It is found that the ratio of h(c,o)/h(d,o)C(p,a) is in the range of 0.6-1.1 and is insensitive to change of fin spacing at low Reynolds number. However, it is noted that this ratio is not a constant throughout the test range. A slight drop of the ratio of h(c,o)/h(d,o)C(p,a) is seen with the decrease of fin spacing and with the rise of the Reynolds number. This is associated with the more pronounced influence during condensate removal. Moreover, during the dehumidifying process, the temperature gradient is directly responsible for establishing the concentration gradient, suggesting the heat transfer and mass transfer are not independent. [Reprinted with permission from Elsevier. Copyright, 2007].

Détails

  • Titre original : On the heat and mass analogy of fin-and-tube heat exchanger.
  • Identifiant de la fiche : 2008-2040
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 51 - n. 7-8
  • Date d'édition : 04/2008

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