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L'utilisation d'une pompe à chaleur pour la préparation d'eau chaude : caractéristiques, conception des systèmes et études expérimentales.

CO2-heat pump water heater: characteristics, system design and experimental results.

Auteurs : NEKSA P., REKSTAD H., ZAKERI G. R., SCHIEFLOE P. A.

Type d'article : Article, Article de la RIF

Résumé

CO2 is one of the few non-toxic and non-flammable working fluids that do not contribute to ozone depletion or global warming, if leaked to the atmosphere. Tap water heating is one promising application for a trans-critical CO2 process. The temperature glide at heat rejection contributes to a very good temperature adaptation when heating tap water, which inherits a large temperature glide. This, together with efficient compression and good heat transfer characteristics of CO2, makes it possible to design very efficient systems. A heating-COP of 4.3 is achieved for the prototype when heating tap water from 9 to 60 deg C, at an evaporation temperature of 0 deg C. The results lead to a seasonal performance factor of about 4 for an Oslo climate, using ambient air as heat source. Thus, the primary energy consumption can be reduced by more than 75% compared with electrical or gas fired systems. Another significant advantage of this system, compared with conventional heat pump water heaters, is that hot water with temperatures up to 90 deg C can be produced without operational difficulties.

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Format PDF

Pages : 172-179

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 : CO2-heat pump water heater: characteristics, system design and experimental results.
  • Identifiant de la fiche : 1998-3864
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 21 - n. 3
  • Date d'édition : 05/1998

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