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Fan-less heat exchanger concept for CO2 heat pump systems.

Author(s) : NEKSÅ P., HOGGEN R. L., AFLEKT K., et al.

Summary

A novel system for space heating has been developed. By a proper design of a counter flow heat exchanger, it is possible to heat air to high temperatures and thereby giving the driving force for circulation of air through the heat exchanger, in consequence without using a fan. An experimental study of a CO2 to air heat exchanger has been performed. The heat exchanger was made of a vertically-finned aluminium profile. Tubes for CO2 were mounted in the base of the profile. CO2 at supercritical pressure flowing downwards through the profile was heating air flowing in the channels formed by the fins of the profile. In this way a perfect counterflow heat exchange was obtained. A simulation model was developed and verified to give good accordance with the experimental data. It is concluded that the new concept looks promising for use as the indoor heat exchanger in an air-to-air heat pump or as a gas cooler for heat rejection in small commercial equipment, when using CO2 as refrigerant.

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Pages: 2004-2

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Details

  • Original title: Fan-less heat exchanger concept for CO2 heat pump systems.
  • Record ID : 2005-2813
  • Languages: English
  • Source: Natural Working Fluids 2004: 6th IIR-Gustav Lorentzen Conference
  • Publication date: 2004/08/01

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