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Amélioration du transfert de chaleur utilisant des additifs dans l'absorption de H2O/LiBr par film vertical tombant.

Heat transfer enhancement by additive in vertical falling film absorption of H2O/LiBr.

Auteurs : CHENG W. L., HOUDA K., CHEN Z. S., et al.

Type d'article : Article

Résumé

The enhancement effects of additive on vertical falling film of water into aqueous lithium bromide (LiBr) were studied by an experimental method. Based on the Navier-Stokes equations of falling film absorption, a new dimensionless parameter, surface renewal number, was introduced, and a semi-empirical equation of enhancement factor of additive was obtained. It was shown that the absorption Marangoni number, the surface Marangoni number, and the surface renewal number enhance the heat transfer of absorption, however the adsorption number and the Reynolds number weaken the heat transfer of absorption. It was proved that the semi-empirical equation agreed well with the experimental results by introduction of the parameters related to surface tension characters presented by the authors into the equation.

Détails

  • Titre original : Heat transfer enhancement by additive in vertical falling film absorption of H2O/LiBr.
  • Identifiant de la fiche : 2004-2230
  • Langues : Anglais
  • Source : Applied Thermal Engineering - vol. 24 - n. 2-3
  • Date d'édition : 02/2004

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