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Etude numérique d'un film tombant et d'absorbeurs de bulles pour les systèmes à absorption de faible puissance au NH3-H2O, refroidis à l'air.

Numerical study of falling film and bubble absorbers for small capacity NH3-H2O air-cooled absorption systems.

Auteurs : CASTRO J., OLIET C., FARNÓS J., et al.

Résumé

Small capacity, air-cooled NH3-H2O absorption systems are becoming more attractive in applications where the input energy can be obtained for free, e.g. solar energy, exhaust gases of engines, etc., due to the increasing price of the primary energy. In this work, an air-cooled absorption refrigeration system for transport application is being studied. As it is well known, the absorber is the most critical heat exchanger due to its low heat and mass transfer coefficients. In this work, two types of suitable absorber are modelled: falling film flow and bubble flow. A review of literature has been done, and a validation has been performed comparing the results of the models with the published results. The nominal working conditions of the absorber have been obtained from a thermodynamic simulation of the whole cycle. The performance of the two types of absorbers is compared for this application.

Documents disponibles

Format PDF

Pages : ICR07-E1-1085

Disponible

  • 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 : Numerical study of falling film and bubble absorbers for small capacity NH3-H2O air-cooled absorption systems.
  • Identifiant de la fiche : 2008-0629
  • Langues : Anglais
  • Source : ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Date d'édition : 21/08/2007

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