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Analyse thermodynamique des systèmes en cascades utilisant des fluides synthétiques ou naturels.

Author(s) : MESSINEO A., PANNO G.

Type of article: Article

Summary

Despite a renewed interest in the use of natural refrigerants, they should comply with several requirements, be more energy efficient than the fluids they replace, be safe, both for the immediate and the environment in general, be simple and efficient to use, readily available, and ideally they should not require major technological adjustments. This paper presents a thermodynamic analysis of different two-stage cascade refrigeration systems using carbon dioxide (R744) in a low-temperature circuit, and respectively ammonia (R717), propane (R290), butane (R600), R404A, R410A and R134a in a high-temperature circuit. Two-stage cascade refrigeration systems are suitable for applications where the evaporating temperature ranges from -30 °C to -50 °C. The operating parameters considered in this study include condensing and evaporating temperatures in the high-temperature circuit, temperature differences in the cascade heat exchanger and evaporating and condensing temperatures in the low temperature circuit. The results obtained show that a cascade refrigeration system using natural refrigerants is an interesting alternative to systems using synthetic refrigerants for energetic, security and environmental reasons.

Details

  • Original title: Analyse thermodynamique des systèmes en cascades utilisant des fluides synthétiques ou naturels.
  • Record ID : 30009031
  • Languages: French
  • Subject: HFCs alternatives
  • Source: Revue générale du Froid & du Conditionnement d'air - vol. 103 - n. 1132
  • Publication date: 2013/04

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