Proceedings of the SAREK Conference (대한설비공학회:학술대회논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Experimental of Absorption Performance Enhancement for Binary Nanofluids($NH_3/H_2O$ + Nano Particles)

이성분 나노유체($NH_3/H_2O$+나노입자)의 흡수성능 촉진실험

  • Lee, Jin-Ki (Graduate School of Mechanical Engineering, Kyung Hee University) ;
  • Jung, Chung-Woo (Graduate School of Mechanical Engineering, Kyung Hee University) ;
  • Koo, June-Mo (Department of Mechanical Engineering, Kyung Hee University) ;
  • Kang, Yong-Tae (Department of Mechanical Engineering, Kyung Hee University)
  • 이진기 (경희대학교 대학원) ;
  • 정청우 (경희대학교 대학원) ;
  • 구준모 (경희대학교 기계.산업시스템 공학부) ;
  • 강용태 (경희대학교 기계.산업시스템 공학부)
  • Published : 2008.06.25
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Abstract

The objectives of this paper are to examine the effect of nano-particles on the pool type absorption heat transfer enhancement and to find the optimal conditions to design a highly effective compact absorber for $NH_3/H_2O$ absorption system. The effect of $Al_2O_3$ and CNT particles on the absorption performance is studied experimentally. The experimental ranges of the key parameters are 20% of $NH_3$ concentration, $0{\sim}0.08%$ (volume fraction) of CNT particles, and $0{\sim}0.06%$ (volume fraction) of $Al_2O_3$ nano-particles. For the $NH_3/H_2O$ nanofluids, the heat transfer rate and absorption rate with 0.02 vol% $Al_2O_3$ nano-particles were found to be 28.9% and 17.8% higher than those without nano-particles, respectively. It is recommended that the concentration of 0.02 vol% of $Al_2O_3$ nano-particles be the best candidate for $NH_3/H_2O$ absorption performance enhancement.

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