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Analysis of a novel refrigeration Carnot-type cycle based on isothermal vapour compression.

Author(s) : TOUBLANC C., CLAUSSE M.

Type of article: Article, IJR article

Summary

A novel Carnot-type cycle is proposed to reach high performances for sub-critical and trans-critical applications. Two natural fluids, ammonia and carbon dioxide each one corresponding to one of the application, were chosen. Compared to conventional cycles, the Carnot-type cycle leads to COP increase by 4-70% depending on the application. For the most suitable case (CO2), a simpler design resulting from a trade-off between complexity and performances still exhibits high performances [92.5% of COP(Carnot) vs. 95.4% for Carnot-type cycle]. Compared to conventional one, this simpler design appears to be more sensitive to the expander efficiency but still achieves higher performances: 80 vs. 50% of COP(Carnot). The impact of the compression cooling efficiency was explored too. With a temperature pinch equal to 20 K, the performances are still better than those of the conventional one (+21% of COP) despite a decrease by 24% of the COP.

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Details

  • Original title: Analysis of a novel refrigeration Carnot-type cycle based on isothermal vapour compression.
  • Record ID : 2008-2451
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 31 - n. 7
  • Publication date: 2008/11

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