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Étude comparative des performances d’une pompe à chaleur au CO2 pour la production combinée de chauffage et d’eau chaude.

A comparative study of CO2 heat pump performance for combined space and hot water heating.

Auteurs : BRODAL E., JACKSON S.

Type d'article : Article, Article de la RIF

Résumé

Heat pumps used for combined space and hot water heating are often used in modern energy-efficient buildings. Performance depends on both system design (exchanger sizes, compressor efficiency, etc.) and operating conditions (inlet water temperature, ratio between space and water heating, etc.). Designs using both CO2 and HFCs, such as R410A, are available, but the relative performance of these is not extensively studied. This article presents performance results based on a system model developed in MATLAB where ex- changers are modelled using fixed temperature pinches and pressure drops. Ejectors and compressors are modelled using defined efficiencies. Operating parameters are optimized using the Genetic Algorithm for a set of sensitivity studies. The results show that CO2 can outperform R410A when the ratio of space to water heating is below 0.6–1.0, feedwater is below 20 °C (as in norther Europe) and heat exchangers are designed with temperature pinches below 10 K.

Documents disponibles

Format PDF

Pages : 234-245

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 : A comparative study of CO2 heat pump performance for combined space and hot water heating.
  • Identifiant de la fiche : 30027067
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 108
  • Date d'édition : 12/2019
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2019.08.019

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