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http://dx.doi.org/10.3795/KSME-B.2012.36.9.895

Evaluation of Dispersion Stability and Absorption Performance Enhancement of Binary Nanoemulsion Fluids  

Lee, Jin-Ki (Energy System R&D Group, Korea Institute of Industrial Technology)
Kim, Young-Jin (Department of Mechanical Engineering, Kyunghee University)
Shin, Myung-Chul (Energy System R&D Group, Korea Institute of Industrial Technology)
Kim, Se-Won (Energy System R&D Group, Korea Institute of Industrial Technology)
Kang, Yong-Tae (Department of Mechanical Engineering, Kyunghee University)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.36, no.9, 2012 , pp. 895-900 More about this Journal
Abstract
This paper aims to examine the effect of nanodroplets on pool-type absorption heat transfer enhancement and to find the relationship between the dispersion stability and the absorption performance. The concentrations of oil and surfactant are considered as the key parameters. $C_{12}E_4$ and Tween20 are used as the surfactants and N-decane oil is added to the $NH_3/H_2O$ solution to make the binary nanoemulsion fluids. Binary nanoemulsion fluids are dispersed by the ultrasonic vibrator and the stirrer under specific conditions. The dispersion stability of binary nanoemulsion fluids for each oil concentrations is evaluated from the droplet size and Tyndall effect analysis. The absorption performance of binary nanoemulsion fluids is compared with the result of dispersion stability. In addition, it is found that the binary nanoemulsion fluid is a strong candidate as a new working fluid for absorption applications.
Keywords
Absorption system; Nanoemulsion fluids; Absorption performance enhancement; Ammonia/water; Dispersion stability;
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