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Impact de la solubilité de l'huile et de l'évaporation instantanée du frigorigène sur la performance des systèmes à compression de vapeur au CO2 transcritique avec noyage dans l'huile et régénération.

Impact of oil solubility and refrigerant flashing on the performance of transcritical CO2 vapor compression systems with oil flooding and regeneration.

Numéro : pap. n. R23, 2148

Auteurs : BELL I., GROLL E. A., BRAUN J. E., et al.

Résumé

Flooding the compressor of a vapour compression system with oil can allow for a more isothermal compression process. This can lead to significant improvements in performance, particularly when combined with a regenerative heat exchanger. For CO2 cycles with supercritical heat rejection, the superheat horn and throttle are major sources of irreversibility. The combination of flooding and regeneration attacks both of these losses with a relatively small impact on system costs. The improvement in system COP can be over 20% for sink and source temperatures of 30 °C and -30 °C, respectively, with an optimized oil mass fraction and oils that have low refrigerant solubility. However, when some amount of refrigerant is solved in the oil, the cooling capacity is decreased. At a refrigerant solubility of 20% by mass in the oil for fixed oil mass fraction, there is no improvement in system COP compared to the baseline system.

Documents disponibles

Format PDF

Pages : 8 p.

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Impact of oil solubility and refrigerant flashing on the performance of transcritical CO2 vapor compression systems with oil flooding and regeneration.
  • Identifiant de la fiche : 30000980
  • Langues : Anglais
  • Source : 2010 Purdue Conferences. 13th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 12/07/2010

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