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Document IIF

Utilisation d’un nanofluide Al2O3-eau pour étudier la performance du transfert de chaleur par refroidissement par brumisation sur une surface chauffée.

Using Al2O3-water nanofluid to investigate the spray cooling heat transfer performance on a heated surface.

Numéro : pap. n. 63

Auteurs : CHANG T. B., LIN T. H., HUANG J. W., et al.

Résumé

An experimental investigation is performed into the spray cooling heat transfer performance of Al2O3-water nanofluid given four different degrees of subcooling (0°C, 10°C, 20°C and 30°C) and four different spray operating times (10, 20, 30 and 40 hours). The results show that the heat transfer coefficient obtained using a subcooling degree of 20°C is around 8.3%, 8.6% and 15.6% higher than that obtained using subcooling degrees of 10°C, 0°C, and 30°C, respectively. The spray operating time has a negligible effect on the heat transfer performance for a low heat flux. For a high heat flux, the heat transfer coefficient decreases with an increasing spray operating time. The EDS analysis results show that the surfaces of the samples cooled for 10, 20, 30 and 40 hours, respectively, contain 20.58%, 35.51%, 40.08% and 53.25% Al. The SEM images confirm that the thickness of the deposited layer increases with an increasing spray operating time and leads to a lower heat transfer performance as a result.

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Pages : 6

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Détails

  • Titre original : Using Al2O3-water nanofluid to investigate the spray cooling heat transfer performance on a heated surface.
  • Identifiant de la fiche : 30025953
  • 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.2019.0063

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