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Transfert de chaleur par convection du CO2 supracritique en écoulement dans les mini ou microcanaux sous des conditions de refroidissement : comparaison des corrélations phénoménologiques.

Comparison among phenomenological correlations for convective heat transfer of supercritical carbon dioxide flowing in mini/micro channels under cooling conditions.

Auteurs : ASINARI P.

Résumé

Finned compact gas coolers made of flat extruded aluminium tubes with internal mini/microchannels constitute a promising technology and the optimization of this type of heat exchanger is therefore one of the main research goals for the development of refrigerating systems operated with carbon dioxide transcritical cycles. This work aims to compare different phenomenological correlations with the numerical results due to some turbulent closure models, which have been adopted in order to properly take into account the effects due to density fluctuations appearing when the thermo-physical properties strongly depend on temperature. The calculations are not exhaustive because of the wide scattering of the numerical results, but a moderate preference for a specific phenomenological correlation has been outlined.

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Pages : 2005-3

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    20 €

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    Gratuit

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Détails

  • Titre original : Comparison among phenomenological correlations for convective heat transfer of supercritical carbon dioxide flowing in mini/micro channels under cooling conditions.
  • Identifiant de la fiche : 2006-0588
  • Langues : Anglais
  • Source : Commercial Refrigeration. Thermophysical Properties and Transfer Processes of Refrigerants. Proceedings of the IIR International Conferences.
  • Date d'édition : 02/08/2005

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