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Amélioration du transfert de chaleur lors d'un procédé d'absorption à NH3-H2O à l'aide de la convection de Marangoni.

Heat transfer enhancement by Marangoni convection in the NH3-H2O absorption process.

Auteurs : KANG Y. T., KASHIWAGI T.

Résumé

The objectives of this study were to quantify the effect of Marangoni convection on the absorption performance in the ammonia-water absorption process, and to visualize Marangoni convection induced by adding a heat transfer additive, n-octanol. A real-time single-wavelength holographic interferometer is used for the visualization using a He-Ne gas laser. The interface temperature is always the highest due to the absorption heat release near the interface. It was found that the thermal boundary layer increased faster than the diffusion boundary layer (DBL), and the DBL thickness increased by adding the heat transfer additive. The absorption heat transfer was enhanced as much as 3.0-4.6 times by adding the heat transfer additive that generated Marangoni convection.

Détails

  • Titre original : Heat transfer enhancement by Marangoni convection in the NH3-H2O absorption process.
  • Identifiant de la fiche : 2004-0653
  • Langues : Anglais
  • Source : Proceedings of the International Sorption Heat Pump Conference.
  • Date d'édition : 24/09/2002
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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