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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Characteristics of Absorption Heat Transfer on Micro-Scale Hatched Tubes with Different Surface Roughness

미소해칭 전열관의 표면거칠기에 따른 흡수열전달 특성

  • 조현철 (경희대학교 대학원) ;
  • 김춘동 (LG전선(주) 기계연구소) ;
  • 김익생 (LG전선(주) 기계연구소) ;
  • 박찬우 (LG전선(주) 기계연구소) ;
  • 강용태 (경희대학교 기계산업시스템 공학부)
  • Published : 2002.08.01
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Abstract

Objectives of this paper are to investigate the effect of roughness of micro-hatching tubes on the absorption performance and to develop on experimental correlation of Nusselt as a function of the roughness. Three different micro-scale hatched tubes and a bare tube were tested in the present experiment. $H_{2}O/LiBr$ solution is used as working fluid. It was found that absorption performance of micro-scale hatched tubes were improved upto 2 times with an error band of ${\pm}25%$ compared with the bare tube. An experimental correlation of Nusselt was developed as a function of the roughness.

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References

  1. Proceedings of the International Ab-Sorption Heat Pump Conference v.1 Enhancement of heat and mass transfer by CCS tubes Isshiki, N.;Ogawa, K.
  2. U.S. Patent Number: 5617737 Capillary fluted tube mass and heat transfer devices and methods of use Christensen, R. N.;Cook, F. B.;Kang, Y. T.
  3. Transactions of the ASME, Journal of Heat Transfer v.111 Horizontal tube falling film evaporation with structured surfaces Chyu, M.-C;Bergles, A. E.
  4. Proc. of The 1st National Congress on Fluids Eng. An experimental study for the effects of heat exchanger surface shape on a falling liquid film of absorption chiller Kim, K. H.;Min, B. H.;Jeong, S. Y.
  5. International Journal of Refrigeration v.23 no.6 Analytical investigation of two different absorption modes: Falling film and Bubble types Kang, Y. T.;Akisawa, A;Kashiwagi, T.
  6. Journal of Heat Transfer v.121 no.4 Experimental investigation of Marangoni convection in aqueous$LiBr-H_2O$solution with heat transfer additives Kang, Y. T.;Akisawa, A.;Kashiwagi, T.