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Application d'une méthode à couplage optique pour la détection de la formation de givre dans une pompe à chaleur air-air.

The application of photo-coupler for frost detecting in an air-source heat pump.

Auteurs : BYUN J. S., JEON C. D., JUNG J. H., et al.

Type d'article : Article, Article de la RIF

Résumé

This experimental study is carried out to investigate reliability and effectiveness of a new method of using a photo-coupler for detecting frost formation in an air source heat pump, and further to determine the most efficient initiation point of the defrost cycle. This new method of using photo-coupler as a frost-sensing device is evaluated by comparing its performance with conventional time control defrost system in which defrost cycle is set to start at predetermined interval, e.g. about every 1-1.5 h. Results indicate that overall heating capacity of the photo-coupler detection method (case IV) is 5.5% higher than that of the time control method. It is also shown that for maximum efficiency, the defrost cycle must be initiated before the frost build-up area exceeds 45% of total front surface of the outdoor coil.

Documents disponibles

Format PDF

Pages : 191-198

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

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Détails

  • Titre original : The application of photo-coupler for frost detecting in an air-source heat pump.
  • Identifiant de la fiche : 2006-1482
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 29 - n. 2
  • Date d'édition : 03/2006

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