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Formation de givre sur un serpentin de refroidissement dans de l'air d'entrée sursaturé.

Frost formation on a cooling coil in supersaturated supply air.

Auteurs : NGONDA T. N., SHEER T. J.

Résumé

This paper proposes a model for pressure drop and heat transfer of cold-room cooling coils with supersaturated supply air. The model predicts the frost formation and the resulting increase in pressure drop and reduction in heat transfer for a coil. The model has two aspects, the heat exchanger model and the frost model. The heat exchanger is modelled based on distributed parameter principles. The frost is modelled based on layer-averaged energy and mass conservation equations for the frost layer. The airflow is considered as two-phase particle-laden flow, with saturated air as the carrier gas and the suspended ice crystals as the dispersed particles. The paper includes a comparison of results from model simulations with experimental results generated with a flat-finned coil. Reasonable agreement was obtained between the numerical and experimental results, particularly for low temperatures (below -12°C).

Documents disponibles

Format PDF

Pages : ICR07-B2-151

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 : Frost formation on a cooling coil in supersaturated supply air.
  • Identifiant de la fiche : 2008-0223
  • 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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