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

Author(s) : ASINARI P.

Summary

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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Details

  • Original title: Comparison among phenomenological correlations for convective heat transfer of supercritical carbon dioxide flowing in mini/micro channels under cooling conditions.
  • Record ID : 2006-0588
  • Languages: English
  • Source: Commercial Refrigeration. Thermophysical Properties and Transfer Processes of Refrigerants. Proceedings of the IIR International Conferences.
  • Publication date: 2005/08/02

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