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Performance comparison of cascade and two-stage refrigeration cycles using natural refrigerants.

Author(s) : OUADHA A., HADDAD C., EN-NACER M., et al.

Summary

This paper aims to compare performances of cascade refrigeration systems with two-stage refrigeration systems using exergy method. The considered systems use natural refrigerants, namely carbon dioxide (R-744), ammonia (R-717) and propane (R-290). R-744 is used in the low stage and R-717 or R-290 in the high stage, while the two-stage system uses only R-717 or R-290. Comparison results show that for a given refrigeration capacity, evaporator and condenser temperature and cascade-condenser temperature, the compressor of R744 in the cascade cycle is more compact than those of R-290 and R-717 in the two-stage cycles. While cascade system provides lower exergy efficiency for both the two blends of refrigerants R-744/R-290 and R-744/R-717.

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Pages: ICR07-B1-118

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Details

  • Original title: Performance comparison of cascade and two-stage refrigeration cycles using natural refrigerants.
  • Record ID : 2007-2546
  • Languages: English
  • Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Publication date: 2007/08/21

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