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Document IIF

Systèmes de chauffage d'eau sanitaire à pompe à chaleur au dioxyde de carbone transcritique. II. Simulation et optimisation du système.

Transcritical carbon dioxide microchannel heat pump water heaters. II. System simulation and optimization.

Auteurs : GOODMAN C., FRONK B. M., GARIMELLA S.

Type d'article : Article, Article de la RIF

Résumé

This paper presents the development of a transcritical CO2 heat pump water heating system model incorporating analytical heat exchanger models and an empirical compressor model. This study investigated the effects of a suction line heat exchanger (SLHX) and once-through versus recirculating water heating schemes. The once-through systems outperformed the recirculating systems by 10% for the system without an SLHX and 15% with an SLHX. However, a gas cooler twice as large is required. The SLHX was shown to benefit system performance at higher evaporator temperatures with improvements of 16.5% for the once-through and 4% for the recirculating systems. This study can be used to improve the design of microchannel based transcritical CO2 heat pumps; evaluate the impact of varying water inlet temperature, desired outlet temperature and evaporation temperature on system performance; and quantify the effect of differential diurnal electricity rates on system operating costs for these different operation schemes.

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Format PDF

Pages : 870-880

Disponible

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    20 €

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    Gratuit

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Détails

  • Titre original : Transcritical carbon dioxide microchannel heat pump water heaters. II. System simulation and optimization.
  • Identifiant de la fiche : 30000505
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 34 - n. 4
  • Date d'édition : 06/2011

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