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Retrofit of a Swedish district heat pump from R500 to KLEA R134a.

Author(s) : DEKLEVA T. W., DURR B., GUY P. D., PETTERSSON L., WIDGREN T.

Summary

The paper describes the materials and engineering considerations given to the world's first full-scale test with R134a in a 25 megawatt heat pump, and the procedures and performances associated with retrofitting one of these units from R500 to R134a. Performance tests show that full-load heat output is reduced by approximately 2% for R134a, and that the COP is essentially unchanged. The retrofitted system, which contains more than 22,700 kg of R134a, shows maintenance and performance characteristics similar to those seen for R12 and R500, and the experiences after more than 2 years of operations are described. In that time, more than 270 gigawatthours of district heating have been generated; water temperatures in excess of 90 deg C have been realized. These experiences indicate that R134a is the alternative refrigerant for heat pumps running on R12 and R500.

Details

  • Original title: Retrofit of a Swedish district heat pump from R500 to KLEA R134a.
  • Record ID : 1994-2168
  • Languages: English
  • Source: The 1993 International CFC and Halon Alternatives Conference. Stratospheric Ozone Protection for the 90's. Proceedings.
  • Publication date: 1993/10/20
  • Document available for consultation in the library of the IIR headquarters only.

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