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Prospects for real-gas reversed Brayton cycle heat pumps.

Author(s) : ANGELINO G., INVERNIZZI C.

Type of article: Article, IJR article

Summary

Ideal-gas reversed Brayton cycles are shown to be intrinsically inefficient owing to the high level of turbomachinery losses. An appropriate selection of the cycle operating parameters allows the design of regenerated gas cycles with efficiencies similar to those of conventional vapour compression cycles, at least in the generation of high-temperature heat. A number of working fluids are presented (both pure substances and mixtures) yielding a good conversion efficiency at various source-sink temperatures. Basic optimization rules are given for fluids of different molecular structure. The main features of the real-gas heat pump cycle can be summarized as the large power density, the ability to operate at high temperature with a small pressure ratio, and non-isothermal heat generation. These features can be of real interest for some applications (for instance, district heating).

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Pages: 272-280

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Details

  • Original title: Prospects for real-gas reversed Brayton cycle heat pumps.
  • Record ID : 1995-3809
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 18 - n. 4
  • Publication date: 1995/05

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