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Document IIF

Caractéristiques du transfert de chaleur de dioxyde de carbone transcritique dans un tube de petite taille rainuré.

Heat transfer characteristics of supercritical carbon dioxide cooled inside small size grooved tube.

Auteurs : DANG C., IINO K., HIHARA E., et al.

Résumé

In this study, the heat transfer characteristics of supercritical carbon dioxide cooled inside a small size grooved tube are experimentally investigated. The mean inner tube diameter, fin height, and helix angle are 2 mm, 0.15 mm, and 6.3º, respectively. The average area enlargement ratio is 2.0. The experiments are carried out using supercritical carbon dioxide at pressures in the range of 8-10 MPa and mass fluxes in the range of 400-1200 kg/m2.s. The results show that rate of increase in the heat transfer coefficient and the pressure drop for the grooved tube is twice that of a smooth tube with the same mean inner diameter; the higher rate can be attributed to the increase in the heat transfer area. The prediction model for smooth tubes can also be applied for grooved tubes with a small helix angle if the area enlargement ratio is considered.

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Pages : 2008-2

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Détails

  • Titre original : Heat transfer characteristics of supercritical carbon dioxide cooled inside small size grooved tube.
  • Identifiant de la fiche : 2009-0080
  • Langues : Anglais
  • Source : 8th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2008)
  • Date d'édition : 07/09/2008

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