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A study on heat transfer and pressure drop characteristics for single-phase flow in a rectangular microchannel.

Une étude sur les caractéristiques de transfert de chaleur et de chute de pression d'un écoulement monophasique dans un microcanal rectangulaire.

Numéro : pap. ID: 165

Auteurs : MUN J. H., KIM S. C., KIM Y. L., et al.

Résumé

An experimental investigation has been performed on the convective heat transfer characteristics for a single phase laminar flow in microchannels. The test sample used in this experiment contains 20 rectangular microchannels which have hydraulic diameter of 700 µm. Distilled water was used as a working fluid. The experiments were conducted with the range of Reynolds number from 400 to 800, heat flux ranging from 35 to 85 kW/m2 and the inlet fluid temperature of 20°C. As experimental results, it was found that thermal entry length is about 10-40 mm and convective heat transfer coefficient has values in the range of 4.6-6.4 kW/m2°C except for thermal entrance region. A numerical analysis has been also carried out on the convective heat transfer and pressure drop in a microchannel. As the results of numerical analysis, correlations were suggested for the friction factor and Nusselt number as functions of Reynolds number in the fully developed region.

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Pages : 8 p.

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Détails

  • Titre original : A study on heat transfer and pressure drop characteristics for single-phase flow in a rectangular microchannel.
  • Identifiant de la fiche : 30001590
  • Langues : Anglais
  • Source : Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Date d'édition : 21/08/2011

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