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Compact heat exchangers for mobile CO2 systems.

Author(s) : HAFNER A.

Summary

With all its advantages, the natural refrigerant carbon dioxide (CO2) offers new possibilities for efficient heating and cooling in different climates. In reversible air conditioning systems, the capacity and efficiency in cooling mode are seen to be the most important aspects. A prototype CO2 system with a separator, refrigerant pump and a single pass heat exchanger was tested under various conditions. Compared with a baseline heat exchanger of equal size, the use of an external operated pump to circulate the refrigerant through the heat exchanger, increased the cooling capacity at equal pressure levels by up to 14%. At equal cooling capacities the COP increased by up to 23%. Air-side temperature distribution was more uniform when the system was operated in this manner.

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Pages: 2002-5

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Details

  • Original title: Compact heat exchangers for mobile CO2 systems.
  • Record ID : 2003-2589
  • Languages: English
  • Publication date: 2002/09/17
  • Source: Source: Proc. 5th IIR-Gustav Lorentzen Conf. nat. Working Fluids, Guangzhou/ C. R. Conf. Guangzhou, IIF
    2002-5; sess. 2; pap. 27; 224-231; fig.; 6 ref.

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