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Technologies for high-efficiency packaged air conditioners using R32.

[In Japanese. / En japonais.]

Author(s) : DOMYO N., KITA K., YAJIMA R.

Summary

The authors investigated the R32 performance of a 14 kW prototype with a variable-speed compressor driven by a motor controlled by a DC inverter. The test analysis shows that the COP of R32 is higher than that of R410A not only under the rated capacity but even under the capacity reduced by compressor speed control. The analysis also shows that its heating COP at a low ambient temperature and its cooling COP under overload conditions are superior and the refrigerant charge can be reduced by adoption of smaller diameter than transfer tubes for heat exchangers. As a result, if a R32 system is operated during the specified seasonal period in Tokyo area, its TEWI drops by 18% compared with that of R410A and the direct impact portion in the case of R32 decreases to 7% of the total impact.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 2006-0385
  • Languages: Japanese
  • Source: The International Symposium on HCFC Alternative Refrigerants and Environmental Technology 2000: Latest technology for Energy Conservation, Refrigerants and Recycling on Air-Conditioning and Refrigeration Equipment for the 21st century. Proceedings.
  • Publication date: 2000/12/07

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