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Importance relative de la résistance au transfert de masse entre particules dans la modélisation du lit poreux d’un refroidisseur à adsorption.

Relative importance of inter-particle mass transfer resistance in the modeling of adsorption chiller porous bed.

Auteurs : MAHDAVIKHAH M., KHATIBI M., NIAZMAND H.

Type d'article : Article, Article de la RIF

Résumé

In order to investigate the effects of various parameters on the adsorption chiller performance, the adsorbent bed must be modeled with the appropriate governing equations and assumptions. One of the assumptions, which greatly influences the modeling complexity and computational cost is the bed uni- form pressure assumption, which relaxes the need for solving the momentum equations governing the motion of the refrigerant vapor through the porous bed. However, in some bed conditions the bed pres- sure distribution should be calculated and the inter-particle resistance cannot be neglected, which in turn requires the determination of the bed velocity field. It is of great practical importance to know in advance, whether the uniform pressure approach is appropriate for the modeling of the problem in hand. In this study, a dimensionless parameter based on the scale up analysis of the governing equations is introduced, which can be calculated based on the input data of the problem to decide about the appropriate bed pressure assumption prior to start the modeling process.

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Format PDF

Pages : 104-112

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    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 : Relative importance of inter-particle mass transfer resistance in the modeling of adsorption chiller porous bed.
  • Identifiant de la fiche : 30026817
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 106
  • Date d'édition : 10/2019
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2019.06.005

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