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Frigorigène naturel CO2 : transfert de chaleur en ébullition dans un tube de faible diamètre.

Boiling heat transfer of the natural refrigerant CO2 in a small tube.

Auteurs : AOKI Y., TANIGUCHI M., WATANABE Y.

Résumé

The object of the study was to obtain experimental data for the boiling heat transfer coefficients and the pressure drops for flow of CO2 in a horizontal small tube, of which the inner diameter was 1.0 mm. As a result, the experimental values of the frictional pressure drop are smaller than that given by Chisholm-Laird's correlation. In the boiling heat transfer coefficient of CO2, the nucleate boiling is predominant when the mass flux is low and the forced convection evaporation is predominant when the mass flux is high. Thus, it can be assumed that the mechanism of boiling heat transfer of CO2 in a small tube is similar to that in a tube of relatively large diameter.

Détails

  • Titre original : Boiling heat transfer of the natural refrigerant CO2 in a small tube.
  • Identifiant de la fiche : 2006-1140
  • Langues : Anglais
  • Source : Green breeze from Asia: frontiers of refrigerants, heat transfer and system.. ACRA-2002. Proceedings of the Asian conference on refrigeration and air conditioning.
  • Date d'édition : 04/12/2002

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