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Micro technology in heat pumping systems.

Author(s) : MUNKEJORD S. T., MAEHLUM H. S., ZAKERI G. R., et al.

Type of article: Article, IJR article

Summary

Micro heat pumps, with dimensions in the order of centimeters, may in the future be utilised for the heating and/or cooling of buildings, vehicles, clothing, and other products or applications. A number of issues have 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 with propane (R290) as refrigerant 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 up to 135kW/m2, based on the refrigerant-side area, was attainable. The corresponding overall heat transfer coefficient was 10 kW/(m2K), with a refrigerant mass flux of 165 kg(m2 s) and a refrigerant-side pressure drop of 180 kPa/m.

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Format PDF

Pages: 471-478

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Details

  • Original title: Micro technology in heat pumping systems.
  • Record ID : 2003-0436
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 25 - n. 4
  • Publication date: 2002/06

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