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CO2 flow condensation heat transfer in microchannels.

[ In Korean. / En coréen.]

Author(s) : PARK C. Y., HRNJAK P. S.

Summary

CO2 flow condensation heat transfer coefficients are investigated for 0.89 mm microchannels at horizontal flow conditions. They were measured at saturation temperatures of -15 and -25°C, mass fluxes from 200 to 800 kg/m2.s, and wall subcooling temperatures from 2 to 4°C. Measured heat transfer coefficients increased with the increase of mass fluxes and vapour qualities, whereas they were almost independent of wall subcooling temperature changes. Several correlations, developed from experimental data for the macro-scale tubes, could predict heat transfer coefficients within acceptable error range.

Details

  • Original title: [ In Korean. / En coréen.]
  • Record ID : 2009-1058
  • Languages: Korean
  • Source: The 3rd Korean Congress of Refrigeration.
  • Publication date: 2009/03/19

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