Thermal conductivity enhancement of binary nanoemulsion (O/S) for absorption application

Hea Youn Sul, Jung Yeul Jung, Yong Tae Kang

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Binary nanoemulsions, oil-droplet suspensions in binary solution (H 2O/LiBr), are developed to enhance the heat and mass transfer performance of absorption refrigeration systems. In this study, a novel four-step method is proposed to prepare the stable oil-in-binary solution (O/S) emulsion. To stabilize the nanoemulsions in a strong electrolyte, a polymer (Gum Arabic) 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 concluded that the ratio of 2:1 (oil:surfactant) is the best condition to obtain the distribution stability. 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 the Maxwell's model. It is finally proposed that the thermal conductivity of the binary nanoemulsion could be enhanced by adding nano-sized droplets of n-decane oil, which has a lower thermal conductivity than that of the base fluid.

Original languageEnglish
Pages (from-to)1649-1653
Number of pages5
JournalInternational Journal of Heat and Mass Transfer
Volume54
Issue number7-8
DOIs
Publication statusPublished - 2011 Mar 1

Keywords

  • Absorption system
  • Binary mixture
  • Emulsion
  • Stability
  • Thermal conductivity
  • Water-lithium bromide

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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