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Amélioration de la conductivité thermique des nanoémulsions binaires pour l'application absorption.

Thermal conductivity enhancement of binary nanoemulsions for absorption application.

Auteurs : SUL H. Y., JUNG J. Y., KANG Y. T.

Résumé

Binary nanoemulsions, oil-droplet suspensions in binary solution (H2O/LiBr), are developed to enhance the heat and mass transfer performance of absorption refrigeration cycles. In this study, a novel two-step method was proposed to prepare the stable oil-in-binary solution (O/S) emulsion. To stabilize the nanoemulsions in a strong electrolyte, polymer is used as a steric stabilizer. The droplet size and the thermal conductivity of binary nanoemulsions are measured by the dynamic light scattering method and the transient hot-wire method, respectively. It is found that the size of nano droplets strongly depends on the stability of the binary nanoemulsions. The thermal conductivity of the binary nanoemulsion increases with increasing the concentrations of oil while it is not significantly dependent upon the LiBr concentration of the binary solution. It is also found that the measured thermal conductivity of the binary nanoemulsion with a stabilizer enhances up to 3.6% compared with the estimated one from Maxwell's model.

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Pages : 2010-2

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Détails

  • Titre original : Thermal conductivity enhancement of binary nanoemulsions for absorption application.
  • Identifiant de la fiche : 2010-0776
  • Langues : Anglais
  • Source : 9th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2010). Proceedings. Sydney, Australia, April 12-14, 2010.
  • Date d'édition : 12/04/2010

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