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Critical issues on CO2 transcritical systems optimal heat rejection pressure determination.

Determinazione della pressione ottimale nei sistemi transcritici operanti con anidride carbonica./ Critical issues on CO2 transcritical systems optimal heat rejection pressure determination.

Author(s) : CECCHINATO L., CORRADI M., MINETTO S., et al.

Summary

In this paper, the optimal energy efficiency and upper cycle pressure problem in single stage refrigerating carbon dioxide vapour compressor units operating in transcritical conditions is addressed. Literature approximated solutions to the optimisation problem are questioned and critically discussed. A numerical model for CO2 heat exchangers and refrigerant systems is developed. Different gas coolers are simulated in order to investigate the effect of the outlet gas cooler temperature literature simplifying assumptions on the optimal pressure determination. A commercial refrigeration plant and a tap water heat pump unit are finally simulated to verify the energy performances of literature approximated solutions in presence of an on-board compressor capacity and supply water temperature control respectively.

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Pages: 11 p.

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Format PDF

Pages: 11 p.

Available

  • Public price

    20 €

  • Member price*

    15 €

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Determinazione della pressione ottimale nei sistemi transcritici operanti con anidride carbonica./ Critical issues on CO2 transcritical systems optimal heat rejection pressure determination.
  • Record ID : 2010-0031
  • Languages: English
  • Source: Latest technologies in refrigeration and air conditioning: energy issues and climate change, new refrigerants, new European regulations, new plants, the cold chain. XIII European Conference: June 12-13, 2009, Milan.
  • Publication date: 2009/06/12

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