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Development of a heat pump unit for supplying hot water by controlling and varying the refrigerant mixture composition of R407C.

[In Japanese. / En japonais.]

Author(s) : OBAYASHI T., OKAZAKI T., ABE T., et al.

Summary

The purpose of the study is to develop an efficient unit of supplying hot water (70 °C) without increasing discharged pressure at the refrigeration system with R407C, using the technique of controlling the refrigerant composition. The authors adopted a rectification method for controlling the refrigerant composition. By optimizing the rectification cycle, they were able to control the refrigerant composition from R407C to 7/12/81 mt% in 1 hour. About the rate of varying the composition, with rising the water temperature, they have achieved to vary the composition at 4.1 minute during R32 concentration in refrigerant cycle decrease at 1 wt%, and preventing to increase discharged pressure over 2.8 MPa.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 2006-0958
  • Languages: Japanese
  • Subject: Figures, economy
  • Source: The International Symposium on HCFC Alternative Refrigerants and Environmental Technology 2002: Latest technology for Energy Conservation, Refrigerants and Recycling on Air-Conditioning and Refrigeration Equipment for the 21st century. Proceedings.
  • Publication date: 2002/12/05

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