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Condensation heat transfer and pressure drop of R32/R1123 inside horizontal multiport extruded tubes.

Transfert de chaleur par condensation et chute de pression du R32/R1123 dans des tubes horizontaux extrudés multi-ports.

Auteurs : JIGE D., MIKAJIRI N., KIKUCHI S., INOUE N.

Type d'article : Article de la RIF

Résumé

The condensation heat transfer and frictional pressure drop characteristics of the zeotropic binary mixture R32/R1123 inside two horizontal multiport extruded tubes with different channel shapes were experimentally investigated. The experiments were conducted at a mass flux of 50–400 kgm-2s-1 and an average saturation temperature of 40 ℃. The effects of mass flux, quality, heat flux, and channel shape on the condensation heat transfer were quantified. The heat transfer coefficient and the frictional pressure drop of R32/R1123 were compared with those of pure R32 obtained using the same test multiport extruded tubes. The heat transfer coefficient of R32/R1123 was lower than that of R32 across all mass flux and quality conditions. The frictional pressure drop of R32/R1123 was 20–30% lower than that of R32 at the same mass flux and quality conditions. The correlations of previous studies agreed well with the obtained frictional pressure drop of R32/R1123, with a mean deviation of 17%. The obtained heat transfer coefficient of R32/R1123 was predictable with a mean deviation of -5.2% using the previous correlations proposed for multiport extruded tubes considering the heat transfer reduction due to the thermal resistance caused by temperature glide.

Documents disponibles

Format PDF

Pages : 200-228

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

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Détails

  • Titre original : Condensation heat transfer and pressure drop of R32/R1123 inside horizontal multiport extruded tubes.
  • Identifiant de la fiche : 30027873
  • Langues : Anglais
  • Sujet : Technologie, Alternatives aux HFC
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 120
  • Date d'édition : 12/2020
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2020.08.029
  • Disponible à la bibliothèque de l'IIF

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