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Enhancement of $NH_3$ Bubble Absorption Performance in Binary Nanofluids  

Jung Jun Young (School of Mechanical and Industrial System Engineering, Kyung Hee University)
Kim Jin-Kyeong (School of Mechanical and Industrial System Engineering, Kyung Hee University)
Kang Yong Tae (School of Mechanical and Industrial System Engineering, Kyung Hee University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.17, no.4, 2005 , pp. 312-317 More about this Journal
Abstract
The objectives of this paper are to study the absorption characteristics of $NH_3$ bubbles in the binary nanofluids and to quantify the effects of surfactants and nano-particles on the bubble absorption performance. 2-Ethyl-1-Hexanol, n-Octanol, and 2-Octanol are used as the surfactants and nano-sized $Al_{2}O_3$ and Cu particles are added to make the binary nanofluids into $NH_3/H_{2}O$ solution. The concentration of $NH_3$ solution ($x_s$), the concentration of surfactants ($x_{SA}$), and the mass fraction of nano-particles ($w_{np}$) are considered as key parameters. The experimented ranges of $x_s,\;x_{SA},\;and\;w_{np}$ are $0{\sim}17.92\%,\;0{\sim}1,500\;ppm\;and\;0{\sim}0.2\%$, respectively. The absorption rates are calculated by measuring initial and final weights of test section and exposed time. In addition, the bubble absorption processes are visualized using the shadow graphic method. The results show that the absorption performance is significantly enhanced up to 4 times by adding the surfactants and up to 3 times in the binary nanofluids.
Keywords
Bubble absorption; Surfactant; Nanoparticle; Absorption rate;
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