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Effet de la fréquence de dégivrage sur l'efficacité de celui-ci, la charge thermique du dégivrage et la performance des entrepôts frigorifiques.

Efectos de la frecuencia de desescarche: eficiencia y carga térmica del desescarche, y rendimiento del almacén refrigerado.

Auteurs : SUJAU M., BRONLUND J. E., MERTS I., et al.

Type d'article : Article

Résumé

This article is the Spanish translation of a paper presented at the IIR meeting in Auckland, New Zealand (see this issue of the Bulletin, reference 2010-1974). The performance of a small walk-in cool store and its refrigeration system with temperature terminated electric defrost was measured for defrost intervals ranging from 6 to 30 hours for two dfifferent heat load regimes. Defrost efficiency and defrost duration were both proportional to defrost interval and approximately doubled as defrost interval increased from 6 to 30 hours. The main benefit of longer intervals arose from reduced heating of the coil mass. The change in overall system energy use with defrost interval was not significant because the system used EPR temperature control, and the latent and hence defrost heat loads were quite small compared with the total heat load. At short defrost intervals, cool store temperature control was poorer due to the pulldowns after each defrost. At long defrost intervals, cool store RH was lower and temperature control was poorer due to significant coil performance decline and longer duration defrosts. For the system and heat load conditions studied, a defrost frequency of 8 to 12 hours appeared optimal.

Documents disponibles

Format PDF

Pages : pp. 32-40 (8 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 : Efectos de la frecuencia de desescarche: eficiencia y carga térmica del desescarche, y rendimiento del almacén refrigerado.
  • Identifiant de la fiche : 2010-1975
  • Langues : Espagnol
  • Source : IIF-IIR/Frío Calor Aire acond. - vol. 35 - n. 398
  • Date d'édition : 12/2007

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