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Caractéristiques de transfert de chaleur par condensation du CO2 dans un tube lisse horizontal.

Condensation heat transfer characteristics of CO2 in a horizontal smooth tube.

Auteurs : KANG P., HEO J., YUN R.

Type d'article : Article, Article de la RIF

Résumé

The condensation heat transfer characteristics of CO2 flowing in a horizontal smooth tube were investigated. The tube diameter was 5.15 mm. The condensation temperature ranged from -10 to 5°C, and the mass flux was from 600 to 1000 kg m-2 s-1. When the temperature changed from 0 to -10°C, the increase rate of the heat transfer coefficient was from 9.4 to 14.6%, and the pressure drop increased from 6.2 to 52.9%. When the mass flux increased from 600 to 1000 kg m-2 s-1, the heat transfer coefficient increased from 6 to 35%, and the pressure drop increased from 60 to 165%, which were dependent on the condensation temperature. The increases come from the change of vapor velocity and thermophysical properties with condensation temperature. Considering large variation of mass flux from 200 to 1200 kg m-2 s-1 by including the existing studies, the effect of mass flux on condensation heat transfer coefficient was minor.

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Pages : 1090-1097

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Détails

  • Titre original : Condensation heat transfer characteristics of CO2 in a horizontal smooth tube.
  • Identifiant de la fiche : 30008039
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 36 - n. 3
  • Date d'édition : 05/2013

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