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Possibilities of improving the thermodynamic working conditions of heat pumps for heat recovery.

Author(s) : NOWOTNY S.

Type of article: Article, IJR article

Summary

The possibility of improving the performance of heat pump systems when the source temperature is 40°C and the duty temperature is 80°C is investigated. Normal single-stage or two-stage vapour compression systems using either R11, R12, R21 or ammonia are taken as the starting point. The advantages of using compression superheat, especially with R 12, are demonstrated. The Altenkirch cycle in which ammonia, desorbed from an aqueous solution at the heat sink temperature, is mechanically compressed and then re-absorbed at the heating duty temperature, is studied. It is concluded that the reduced power consumption of this cycle more than compensates for its higher capital cost.

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Pages: 171-175

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Details

  • Original title: Possibilities of improving the thermodynamic working conditions of heat pumps for heat recovery.
  • Record ID : 30000827
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 2 - n.3
  • Publication date: 1979/05

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