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Pompes à chaleur à microcanaux au dioxyde de carbone transcritique utilisées pour chauffer de l'eau chaude sanitaire. 2. Simulation et optimisation des systèmes.

Transcritical carbon dioxide microchannel heat pump water heaters. 2. System simulation and optimization.

Numéro : pap. n. R11, 2519

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

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 multi-pass water heating schemes. The once-through systems outperformed the multi-pass systems by 10% for the system without a SLHX and 15% with a 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 multi-pass 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.

Documents disponibles

Format PDF

Pages : 10 p.

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Transcritical carbon dioxide microchannel heat pump water heaters. 2. System simulation and optimization.
  • Identifiant de la fiche : 30000752
  • Langues : Anglais
  • Source : 2010 Purdue Conferences. 13th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 12/07/2010

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