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Étude expérimentale et numérique d’une pompe à chaleur eau-eau au CO2 pour la production d’eau chaude.

Experimental and numerical study of a CO2 water-to-water heat pump for hot water generation.

Auteurs : ILLÁN GÓMEZ F., SENA CUEVAS V., GARCIA CASCALES J. R., VELASCO F. J. S.

Type d'article : Article de la RIF

Résumé

This paper reports the results of an experimental and numerical study of different configurations of a CO2 water-to-water heat pump for hot water generation. The experimental installation developed to test the heat pump unit is briefly described and then the experimental results are presented. Numerical results of a model previously developed are compared with experimental results, allowing the validation of the model. Once the model is validated, it is used to predict untested conditions. The results show, for several hot water generation scenarios, the influence that different parameters have on the system performance, including the gas cooler pressure, the internal heat exchanger (IHX) effectiveness, and the heat exchangers area on the efficiency of the system. For low and intermediate heating temperatures, the optimal gas cooler pressure is nearly independent of the range of evaporation water temperature (5 to 30 °C), therefore a constant pressure control able to maintain the pressure slightly above the optimal value, can be the best solution. On the other hand, for medium, and high temperatures, an adaptive control system is strongly recommended. Although the influence of a variation in the heat exchangers area depends on the operating conditions, in general terms, the area of the gas cooler has the higher influence on the efficiency of the system and the area of the IHX has the smaller influence. As the gas cooler temperature increases or the evaporation temperature decreases, the improvement obtained by increasing the HXs area decreases.

Documents disponibles

Format PDF

Pages : 30-44

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 : Experimental and numerical study of a CO2 water-to-water heat pump for hot water generation.
  • Identifiant de la fiche : 30029210
  • Langues : Anglais
  • Sujet : Technologie
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 132
  • Date d'édition : 12/2021
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2021.09.020
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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