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Document IIF

Effets des formes du micro-usinage des surfaces froides sur les courbes de givrage.

Effects of cooling surface micro-machining shapes on frosting curves.

Numéro : pap. n. 936

Auteurs : AGUI H., OHKUBO H., MATSUSHITA S.

Résumé

Naturally formed frost on heat exchangers of low temperature devices is a cause for both increased resistance to air-passage and heat transfer. Therefore, defrosting operations will be needed when frost has collected excessively to avoid the deterioration of the heat exchanger efficiency. Focusing on the size of the droplets, the authors’ group artificially changed the characteristics of the cooling surface by machining grid shapes of 100 microns order on the cooling surface. By doing so, they have succeeded in producing zones with no frost-crystal growth on the surface. In this study, the effects of the groove patterns on the frosting phenomenon under natural convection condition were investigated by varying the cooling surface temperature from -75 °C to -10 °C.

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Pages : 6

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Détails

  • Titre original : Effects of cooling surface micro-machining shapes on frosting curves.
  • Identifiant de la fiche : 30026775
  • Langues : Anglais
  • Source : Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Date d'édition : 24/08/2019
  • DOI : http://dx.doi.org/10.18462/iir.icr.2019.0936

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