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Experimental analysis of a R600 high-temperature heat pump in sub-critical and trans-critical operation.

Number: 1055

Author(s) : VERDNIK M., RIEBERER R.

Summary

High-temperature heat pumps can provide process heat by lifting recovered waste heat to temperature levels needed for industrial processes. The application of a trans-critical cycle extends the operating range of a heat pump beyond the critical temperature of the used refrigerant.
A prototype of a high-temperature heat pump using R600 was developed and investigated. The one-stage cycle uses a suction gas cooled reciprocating compressor, a low-pressure accumulator and an internal heat exchanger (IHX) for suction gas superheating. Experimental data of sub-critical and trans-critical operation is presented. In sub-critical operation, a coefficient of performance (COP) of 4.5 at a heat source inlet temperature of 60 °C and a heat sink outlet temperature of 110 °C and in trans-critical operation a COP of 3.1 at a heat sink outlet temperature of 160 °C was achieved. The measurement data further shows a dependency of the COP on the high-side pressure and suction gas superheating realized in the IHX.

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Experimental analysis of a R600 high-temperature heat pump in sub-critical and trans-critical operation

Pages: 6

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Details

  • Original title: Experimental analysis of a R600 high-temperature heat pump in sub-critical and trans-critical operation.
  • Record ID : 30027999
  • Languages: English
  • Subject: Technology
  • Source: 14th IIR-Gustav Lorentzen Conference on Natural Refrigerants(GL2020). Proceedings. Kyoto, Japon, December 7-9th 2020.
  • Publication date: 2020/12/07
  • DOI: http://dx.doi.org/10.18462/iir.gl.2020.1055

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