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Document IIF

Caractéristiques de performance d'un échangeur de chaleur à surface traitée sous des conditions de givrage.

Performance characteristics of surface-treated heat exchanger under frosting conditions.

Numéro : pap. ID: 315

Auteurs : KIM K., LEE K. S.

Résumé

In this research, performance characteristics of surface-treated heat exchangers were investigated under frosting conditions. Heat exchangers with four stages and two rows were fabricated, and uncoated, hydrophilic, and hydrophobic units were compared in 90-minute frosting experiments. The air-side pressure drop due to frosting was found to be highest for the uncoated heat exchanger, while the hydrophobic heat exchanger exhibited the lowest pressure drop because of frost retardation. The differences in the sensible heat transfer rates of the heat exchangers were insignificant in the early stages of the experiments. Since the frost layer created thermal resistance, the sensible heat transfer rate decreased as time elapsed. In the early stages of the experiments, the hydrophilic heat exchanger had a slightly higher heat transfer rate than the other heat exchangers.

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Pages : 5 p.

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    Gratuit

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Détails

  • Titre original : Performance characteristics of surface-treated heat exchanger under frosting conditions.
  • Identifiant de la fiche : 30002445
  • Langues : Anglais
  • Source : Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Date d'édition : 21/08/2011

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