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Document IIF

Modélisation d'un échangeur de chaleur à tube plat équipé d'un ventilateur et exposé à une croissance de givre non uniforme.

Modeling of a fan-supplied flat-tube heat exchanger exposed to non-uniform frost growth.

Auteurs : BREQUE F., NEMER M.

Type d'article : Article, Article de la RIF

Résumé

Reversible heat pumps for electric vehicles are being developed by the car industry to address cabin heating and improve energy efficiency compared to electric heaters. For this new application, the front, louvered-fin, microchannel heat exchanger (MCHX or flat-tube heat exchanger) of the A/C system happens to operate as an evaporator under frosting conditions. MCHX are particularly sensitive to frosting, and a model is required to improve the design. This paper presents a dynamic pseudo 3D model of a fan-supplied MCHX which predicts non-uniform frost growth, air pressure losses, airflow rate and thus, thermal performances. The air pressure losses are computed considering the maximum frost thickness along each air channel. A correlation was developed to take into account frost effects on the friction factor. The model was validated against ad hoc experimental data and was also able to predict experimental data from the literature.

Documents disponibles

Format PDF

Pages : 129-140

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 : Modeling of a fan-supplied flat-tube heat exchanger exposed to non-uniform frost growth.
  • Identifiant de la fiche : 30021909
  • 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.2016.12.012

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