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Document IIF

Influence de l’épaisseur des corps poreux sur le transfert de chaleur par évaporation par film tombant sur un tube horizontal. 

Effect of porous bodies thickness on evaporation heat transfer by falling film on horizontal tube.

Numéro : 0692

Auteurs : FUKUDA S., MIYATA K., UMEZAWA S.

Résumé

Falling film-type evaporators are expected to be an alternative to flooded-type evaporators to reduce the amount of refrigerant charging needed. The required conditions for falling film-type evaporators are a wet evaporator surface and higher heat transfer through liquid film.
In this study, the falling film heat transfer characteristics of R1233zd(E) on two horizontally installed porous body tubes of different thicknesses were experimentally investigated. There are three thicknesses, 0.5 mm, 1.0 mm and 2.0 mm. The horizontal tubes were 19.05 mm in diameter and 400 mm in heat transfer length. The experiment covered heat fluxes from 3 to 40 kW m–2 with several different amounts of liquid flowing down. The heat transfer coefficient of a tube with 1 mm porous bodies thickness was the highest. Thus, the porous bodies had an appropriate thickness.

Documents disponibles

Format PDF

Pages : 7 p.

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

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Détails

  • Titre original : Effect of porous bodies thickness on evaporation heat transfer by falling film on horizontal tube.
  • Identifiant de la fiche : 30031644
  • Langues : Anglais
  • Sujet : Technologie, Alternatives aux HFC
  • Source : Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
  • Date d'édition : 21/08/2023
  • DOI : http://dx.doi.org/10.18462/iir.icr.2023.0692

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