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Conception optimisée des échangeurs de chaleur pour des pompes à chaleur "réversibles" utilisant du R407C.

Optimized design of heat exchangers for "reversible" heat pump using R407C.

Auteurs : BIGOT G., PALANDRE L., CLODIC D.

Résumé

Temperature glide of R407C can present either an advantage or a disadvantage depending on the heat exchanger design. There is a need for counter-current heat exchangers whatever the type either air/refrigerant or liquid/refrigerant. For air/water heat pump, perfect counter-current design is possible for liquid/refrigerant heat exchangers whereas crossed current with counter-current tendency design is appropriate for air/refrigerant heat exchangers. The definition of external and internal flow rates permitting the limitation of the mean logarithmic temperature difference is an additional constraint. Tests performed on single row and multiple rows refrigerant/air heat exchangers are presented. Comparisons with R22 performance indicate that higher energy efficiency can be obtained with R407C and appropriate heat exchanger design.

Détails

  • Titre original : Optimized design of heat exchangers for "reversible" heat pump using R407C.
  • Identifiant de la fiche : 2001-1267
  • Langues : Anglais
  • Source : Proceedings of the 2000 International Refrigeration Conference at Purdue.
  • Date d'édition : 25/07/2000
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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