Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Experiment on Heat Transfer and Absorption Performance Enhancement for Binary Nanofluids (NH3/H2O + Nano-Particles)

이성분 나노유체 (NH3/H2O + 나노입자)의 열전달 및 흡수성능 촉진실험

  • 이진기 (경희대학교 대학원 기계공학과) ;
  • 정청우 (경희대학교 대학원 기계공학과) ;
  • 강용태 (경희대학교 기계.산업시스템 공학부)
  • Published : 2008.09.01
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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 ammonia/water absorption system. The effect of $Al_2O_3$ nano-particles and carbon nanotube(CNT) on the absorption performance is studied experimentally. The experimental ranges of the key parameters are 20% of ammonia concentration, $0{\sim}0.08\;vol%$ (volume fraction) of CNT particles, and $0{\sim}0.06 \;vol%$ of $Al_2O_3$ nano-particles. For the ammonia/water nanofluids, the heat transfer rate and absorption rate with 0.02 vol% $Al_2O_3$ nano-particles were found to be 29% and 18% 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 ammonia/water absorption performance enhancement.

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References

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