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Document IIF

Performance d'un chauffe-eau à pompe à chaleur utilisant le dioxyde de carbone comme frigorigène dans un cycle transcritique.

Performance of a prototype heat pump water heater using carbon dioxide as the refrigerant in a transcritical cycle.

Auteurs : KERN R., HARGREAVES J. B., WANG J. F., et al.

Résumé

A heat pump water heater using carbon dioxide in the transcritical cycle connected to a stratified hot water cylinder (HWC) was developed. The heat pump used a vented helical double tube heat exchanger for the key gas cooling and water heating heat transfer. The heat pump performance was measured across a wide range of operating conditions. For a water outlet temperature of 60°C, the measured COP was between 2.1 and 3.7 and the heating capacity was between 4.5 and 8.6 kW when discharge pressure was 105 bars/g and evaporation temperature and water inlet temperatures were between 0 and 15°C and 19 and 30°C respectively. Improved compressor efficiency and gas cooler performance were significant opportunities to improve energy efficiency. The stratified HWC provided an effective thermal storage that consistently kept the heat pump inlet water temperature low and the water supply temperature high.

Documents disponibles

Format PDF

Pages : 2006-2

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

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

Détails

  • Titre original : Performance of a prototype heat pump water heater using carbon dioxide as the refrigerant in a transcritical cycle.
  • Identifiant de la fiche : 2007-1749
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 7th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2006). Proceedings
  • Date d'édition : 29/05/2006

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