Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Enhancement of $NH_3$ Bubble Absorption Performance in Binary Nanofluids

이성분 나노유체에서의 암모니아 기포 흡수 성능 향상

  • 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)
  • 정준영 (경희대학교 기계공학과) ;
  • 김진경 (경희대학교 기계공학과) ;
  • 강용태 (경희대학교 기계산업시스템공학부)
  • Published : 2005.04.01
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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

References

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