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Analyse de la distribution surfacique du transfert de chaleur dans une géométrie ailette-tube dépolie et lisse.

Analysis of the heat transfer area distribution in a frosted plain fin-and-tube geometry.

Auteurs : MORALES-FUENTES A., CHAPA-CONTRERAS O. M., MENDEZ-DIAZ S., et al.

Type d'article : Article, Article de la RIF

Résumé

The development of frost is a phenomenon that deteriorates thermohydraulic performance on heat exchangers. In this study, several heat-transfer area distributions on a fin-and-tube geometry are proposed and their performances as frost develops are compared using simulation. The frost development at a specific location is determined using a segment analysis. In each segment, a semiempirical model to predict the frost growth based on air temperature, velocity, relative humidity and surface temperature is applied. The analysis considers airflow redistribution among channels, leading to changes in heat transfer and frosting rates with time. Results show that a geometry that allows even flow distribution along the operation time is less sensitive to thermohydraulic deterioration. An area distribution with larger fin spacing and fin length presents an advantage, particularly on the pressure drop, which allows longer operation time between defrost cycles.

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Format PDF

Pages : 26-37

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

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Détails

  • Titre original : Analysis of the heat transfer area distribution in a frosted plain fin-and-tube geometry.
  • Identifiant de la fiche : 30021901
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 75
  • Date d'édition : 03/2017
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2017.01.016

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