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The Stirling cycle optimized for heat pump use.

Author(s) : LUNDQVIST P.

Summary

A Stirling cycle heat pump driven by an electric motor has been optimized. The strategy for the optimization was highest possible heating COP. All parasitic losses were included in the computer model. The result is a COP varying from 2 to 2.5 with an upper temperature limit high enough for low pressure steam production. The optimization is evaluated by a comparison of the yearly COP for the entire heating system with a conventional R22 heat pump system (air/water). This gives a slightly higher yearly COP for the R22 system. The Stirling system eliminates problems related to current heat pump systems such as need for a peak heater, CFC leakage, and unwanted shut off due to high heat sink temperature or low heat source temperature. A further advantage is reversed heating power characteristic: a higher temperature rise gives a higher heating power. This follows the characteristics of normal heating systems. The Stirling cycle as a refrigerator is briefly touched at the end of the paper. A comparison with a state of the art two stage conventional refrigeration system shows the possibilities in low temperature refrigeration.

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Details

  • Original title: The Stirling cycle optimized for heat pump use.
  • Record ID : 1992-3001
  • Languages: English
  • Source: Heat pumps and energy recovery.
  • Publication date: 1990/08/29
  • Document available for consultation in the library of the IIR headquarters only.

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