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Performance d'un système transcritique au CO2 muni d'un échangeur de chaleur interne utilisé pour le chauffage d'eau.

The performance of a transcritical CO2 cycle with an internal heat exchanger for hot water heating.

Auteurs : KIM S. G., KIM Y. J., LEE G., et al.

Type d'article : Article, Article de la RIF

Résumé

The main purpose of this study is to investigate the performance of a transcritical CO2 cycle with an internal heat exchanger for hot water heating. Performance test and simulation have been carried out for a transcritical CO2 cycle by varying secondary heat transfer fluid temperatures at evaporator and gas-cooler inlets as well as the discharge pressure. Variations of mass flow rate of refrigerant, compressor power, heating capacity, and COP with respect to the length of an internal heat exchanger are presented at various operating conditions. Good quantitative agreement between model predictions and experimental results has been found; most parameters have absolute average deviations of less than 4%. As the length of the internal heat exchanger increases, COP is enhanced but heating capacity tends to decrease due to the trade-offs between the effectiveness and pressure drop in the internal heat exchanger.

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Format PDF

Pages : 1064-1072

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    20 €

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Détails

  • Titre original : The performance of a transcritical CO2 cycle with an internal heat exchanger for hot water heating.
  • Identifiant de la fiche : 2005-2460
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 28 - n. 7
  • Date d'édition : 11/2005

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