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Mesures de la conductivité thermique et caractérisation de nanofluides binaires.

Thermal conductivity measurement and characterization of binary nanofluids.

Auteurs : JUNG J. Y., CHO C., LEE W. H., et al.

Type d'article : Article

Résumé

Binary nanofluids, nanoparticle suspensions in binary mixture, are developed to enhance the heat and mass transfer performance of absorption refrigeration cycles. To stabilize the nanoparticles in a strong electrolyte, polymer is used as a steric stabilizer. The effective thermal conductivities of the binary nanofluids with the concentrations of nanoparticle up to 0.1 vol% are measured using the transient hot wire method. Comparing the thermal conductivity change with time, it is found that the dispersion stability of nanofluids is a dominant factor for enhancing the thermal conductivity of binary nanofluids. It is also found that the thermal conductivity of the binary nanofluids (H2O/LiBr binary mixture with Al2O3 nanoparticles) increases with the particle volume concentration and enhances by 2.2% at 0.1 vol% concentration condition. Also a modified dimensionless group is proposed to find the maximum radius of nanoparticles to maintain stable nanofluids. In this study, it was estimated at about 1.3 µm. [Reprinted with permission from Elsevier. Copyright, 2011].

Détails

  • Titre original : Thermal conductivity measurement and characterization of binary nanofluids.
  • Identifiant de la fiche : 30001804
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 54 - n. 9-10
  • Date d'édition : 04/2011
  • DOI : http://dx.doi.org/10.1016/j.ijheatmasstransfer.2011.01.021

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