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Characteristics of heat transfer system with supercritical carbon dioxide.

Number: pap. NS16

Author(s) : ITOH T., UEFUJI Y., KUBO T., et al.


To prevent the issues of global warming and climate change, reducing amount of alternative refrigerants, which have the high GWP is social responsibility. In this paper, the secondary heat transfer system using the supercritical carbon dioxide as a non-fluorocarbon's heat pump air conditioner, which replaces the present HFC-410A heat pump air conditioner was proposed. This
system consists of two parts. One is the heat pump cycle and another is the heat transfer cycle. In the heat pump cycle, propane is used as refrigerant instead of HFC-410A. Key components (a carbon dioxide pump and an intermediate heat exchanger) have been newly developed. Structures of them were designed considering with not only efficiencies but also costs. Moreover, these apparatus were evaluated in the actual air-conditioning system using supercritical carbon dioxide. A maximum efficiency of the regeneration pump reached about 25% and the COP of the secondary heat transfer system reached 3.44 in the heating. This COP is equivalent level of a conventional airconditioner with HFC-410A. These results give us a big possibility to solve the HFC-410A air-conditioning system replacement.

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  • Original title: Characteristics of heat transfer system with supercritical carbon dioxide.
  • Record ID : 30000580
  • Languages: English
  • Source: Measures to address climate change. 2010 International Symposium on Next-generation Air Conditioning and Refrigeration Technology: February 17-19, Tokyo, Japan.
  • Publication date: 2010/02/17


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