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Etude sur un cycle transcritique au CO2 pour les systèmes frigorifiques et à pompe à chaleur.

Study of CO2 transcritical cycle for refrigerating and heat pump systems.

Auteurs : GARCÍA J., COELHO L., DELGADO H.

Résumé

The warning about greenhouse effects due to chlorine and fluorinated refrigerants had been discussion aim in several international scientific meetings. The reintroduction of R-744 (CO2) as natural refrigerant will open a new perspective of market, becoming it more competitive and increasing the equipments efficiencies. The objective of this work is study a CO2 transcritical cycle for a refrigerating/heat pumps applications in the ambit of a European Project labelled "GROUNDHIT - Ground Coupled Heat Pumps of High Technology" from Sixth Framework Programme. A technology survey about transcritical cycles allows a better knowledge about the components of the system, make some improvements and develop the technology. A study of functioning parameters using thermography equipment, parameters like, gas cooler and evaporator pressure and temperature, discharge compressor temperature, temperature difference and outlet temperature in gas cooler for a transcritical cycle (one and two stage cycle) allows determine best operating conditions and best performance value.

Détails

  • Titre original : Study of CO2 transcritical cycle for refrigerating and heat pump systems.
  • Identifiant de la fiche : 2008-1210
  • Langues : Anglais
  • Date d'édition : 20/11/2006
  • Source : Source : Climamed 2006, Lyon
    PIV-2.5; 333-340; fig.; phot.; tabl.; 5 ref.

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