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Conception et simulation d'une pompe à chaleur pour les applications de chauffage et de refroidissement utilisant un HFC ou le CO2 comme fluide actif.

Design and simulation of a heat pump for simultaneous heating and cooling using HFC or CO2 as a working fluid.

Auteurs : BYRNE P., MIRIEL J., LENAT Y.

Type d'article : Article, Article de la RIF

Résumé

This article presents a heat pump for simultaneous heating and cooling (HPS) designed for hotels, luxury dwellings and smaller office buildings. The main advantage of the HPS is to carry out simultaneously space heating and space cooling in a dual mode. The ambient air is used as a balancing source to run a heating or a cooling mode. The HPS also participates to domestic hot water preparation all year round. The second advantage is that, during winter, some energy recovered by subcooling of the refrigerant is stored at first in a cold water tank that is not used for cooling. This energy is used subsequently as a cold source at the water evaporator in order to improve the average coefficient of performance and to run a defrosting sequence at the air evaporator. Two refrigerants are studied: HFC R407C and carbon dioxide. HFCs provide good performance, but new restrictive regulations on F-gases lead us to study low-GWP refrigerants as well. Highly efficient models of compressors and heat exchangers have been defined. Annual simulations show that CO2 is a refrigerant which adapts rather well to the operation of the HPS thanks to the higher amount of energy available by subcooling and the large temperature glide at heat rejection used for DHW production.

Documents disponibles

Format PDF

Pages : pp. 1711-1723

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 : Design and simulation of a heat pump for simultaneous heating and cooling using HFC or CO2 as a working fluid.
  • Identifiant de la fiche : 2009-2159
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 32 - n. 7
  • Date d'édition : 11/2009

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