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Heat transfer and pressure drop characteristics of evaporating carbon dioxide in microchannel tubes.

Author(s) : PETTERSEN J., RIEBERER R., MUNKEJORD S. T.

Summary

The tube had 25 circular ports/channels with 0.79 mm inner diameter. Data are presented for the following range of variables: mass flux 200-600 kg/m2s), evaporation temperature 0-20 °C, and heat flux 5,000-20,000 W/m2. The overall heat transfer coefficient was measured for water-to-CO2 heat transfer. The measured CO2 evaporation heat transfer coefficients lay in the range between 5,000 and 15,000 W/(m2K). From a certain vapour fraction upwards, the heat transfer coefficient dropped significantly. This effect was most pronounced for high mass fluxes and evaporation temperatures.

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Pages: 2000-1

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Details

  • Original title: Heat transfer and pressure drop characteristics of evaporating carbon dioxide in microchannel tubes.
  • Record ID : 2002-0053
  • Languages: English
  • Source: Final proceedings of the 4th IIR-Gustav Lorentzen Conference on Natural Working Fluids at Purdue.
  • Publication date: 2000/07/25

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