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Document IIF

Visualisation de l'écoulement de condensation, transfert de chaleur et chute de pression dans les échangeurs de chaleur à circuit imprimé avec microcanaux droits et ondulés.

Condensation flow visualization, heat transfer, and pressure drop in printed circuit heat exchangers with straight and wavy microchannels.

Auteurs : GOTO T., JIGE D., INOUE N., SAGAWA K.

Type d'article : Article de la RIF

Résumé

This study experimentally investigated the condensation flow visualization, heat transfer, and pressure drop characteristics of R1234ze(E) and R32 in printed circuit heat exchangers (PCHEs) with straight and wavy microchannel geometries. The effects of the microchannel geometries and refrigerants on the condensation flow, heat transfer, and pressure drop characteristics were investigated. Three flow patterns, namely, the nondisturbance annular, annular, and plug flows, were observed in the straight microchannels, whereas only annular and plug flows were observed in the wavy microchannel. A thin liquid film was observed to form on the inner arc of the wavy microchannel in the plug flow region. The overall heat transfer coefficient and pressure drop of the PCHE with the wavy microchannel were, respectively, 11% and 18% higher than those of the PCHE. The overall heat transfer coefficient and pressure drop of R1234ze(E) were 29% lower and 42% higher, respectively, than those of R32.

Documents disponibles

Format PDF

Pages : 234-240

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 : Condensation flow visualization, heat transfer, and pressure drop in printed circuit heat exchangers with straight and wavy microchannels.
  • Identifiant de la fiche : 30031935
  • Langues : Anglais
  • Sujet : Technologie
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 152
  • Date d'édition : 08/2023
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2023.05.002

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