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Document IIF

Amélioration du COP par le transfert de la surchauffe vers l'échangeur de chaleur interne.

COP improvement by transfer of the superheating into the internal heat exchanger.

Auteurs : TAMBOVTSEV A., QUACK H.

Résumé

It is well known that the power consumption of refrigerators is reduced by about 2-3%, when the evaporation temperature is increased by 1 K. It is proposed to obtain such an increase in the evaporation temperature by a combination of an internal heat exchanger in combination with a thermostatic expansion valve. With this combination it is possible to realize a slightly wet outlet of the low pressure stream out of the evaporator and to transfer the final evaporation and the superheating into the internal heat exchanger. To facilitate a stable control behaviour it is proposed to operate the internal heat exchanger in the co-current mode. The result of this arrangement is a power saving in the 5 to 10% range and a similar increase of the volumetric refrigeration rate. A further increase is possible, if the surface area of the evaporator is increased. This arrangement is advantageous for all refrigerants, even for ammonia, where normally internal heat exchangers are detrimental.

Documents disponibles

Format PDF

Pages : ICR07-B2-1406

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 : COP improvement by transfer of the superheating into the internal heat exchanger.
  • Identifiant de la fiche : 2008-0607
  • Langues : Anglais
  • Source : ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Date d'édition : 21/08/2007

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