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Caractéristiques du transfert de chaleur en ébullition et de la chute de pression du R-600 dans un tube circulaire avec des inserts poreux.

The characteristics of boiling heat transfer and pressure drop of R-600a in a circular tube with porous inserts.

Auteurs : WEN M. Y., JANG K. J., HO C. Y.

Type d'article : Article

Résumé

This investigation was undertaken in order to better understand the characteristics of sub-cooled flow boiling heat transfer and pressure drop of a hydrocarbon refrigerant R600a (isobutane) flowing in a circular pipe within dispersed-copper porous inserts. The test was conducted at a saturation temperature of 10°C, vapor qualities were from 0.076 to 0.87, and there was shown to be a mass flux of 120-1100 kg/ m2 s and a heat flux of 12-65 kW/m2. The effects of Reynolds number and the sizes of inserts (the porosity, mean pore diameters and permeability) on the heat transfer and pressure drop of R-600a are presented. In addition, empirical correlations for estimating the boiling heat transfer coefficients and pressure drop for pure R-600a under these conditions have been proposed.

Détails

  • Titre original : The characteristics of boiling heat transfer and pressure drop of R-600a in a circular tube with porous inserts.
  • Identifiant de la fiche : 30010934
  • Langues : Anglais
  • Source : Applied Thermal Engineering - vol. 64 - n. 1-2
  • Date d'édition : 03/2014
  • DOI : http://dx.doi.org/10.1016/j.applthermaleng.2013.12.074

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