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Microtechnology in heat pumping systems.

Author(s) : MUNKEJORD S. T., MAEHLUM H. S., NEKSÅ P., et al.

Summary

Micro heat pumps, with dimensions in the order of centimeters, may in the future be utilised for the heating and/or cooling in buildings, vehicles, clothing, and other products or applications. A number of issues are yet to be solved, including the construction of a microscale compressor, and determination of micro heat exchanger heat transfer capacities. Test samples of micro heat exchangers and a corresponding test apparatus have been built. Some two-phase experiments have been conducted. Preliminary results for a micro condenser with 0.5 mm wide trapezoidal channels of 25 mm length showed that a heat flux of 135 kW/m2, based on the refrigerant-side area, was attainable. The corresponding overall heat transfer coefficient was 10 kW/(m2.K), with a refrigerant-side pressure drop of 180 kPa/m.

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Details

  • Original title: Microtechnology in heat pumping systems.
  • Record ID : 2000-1564
  • Languages: English
  • Source: 20th International Congress of Refrigeration: Refrigeration into the Third Millennium.
  • Publication date: 1999/09/19

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