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Corrélation relative au transfert de masse, au cours de l'absorption de bulles d'ammoniac dans le mélange eau-ammoniac.

Mass transfer correlation of NH3-H2O bubble absorption.

Auteurs : KANG Y. T., NAGANO T., KASHIWAGI T.

Type d'article : Article, Article de la RIF

Résumé

The objectives of this paper are to study the effect of key parameters on absorption performance and to develop an experimental correlation of mass transfer coefficient for ammonia-water bubble absorption. The orifice diameter, liquid concentration and vapour velocity are considered as the key parameters. This study successfully visualized the bubble behaviour and measured the volumetric diameter of bubbles during the bubble absorption process. The bubble absorption is grouped into two processes, bubble growth (process I) and bubble disappearance (process II), respectively. The following conclusions were drawn from the present study. A new experimental correlation for the volumetric bubble diameter was proposed with plus or minus 15% error band, which could be applied to calculate the mass transfer coefficient. The mass transfer coefficient increased with a decrease of the liquid concentration. In process II, the mass transfer coefficient increased with an increase of the Galileo number. Finally, experimental correlations of mass transfer coefficient were developed for processes I and II with plus or minus 18% error bands.

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Pages : 878-886

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  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Mass transfer correlation of NH3-H2O bubble absorption.
  • Identifiant de la fiche : 2003-0756
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 25 - n. 7
  • Date d'édition : 11/2002

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