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 Fluid Flow and Heat Transfer in a Fluidized Bed Heat Exchanger

순환유동층 열교환기내 유동과 열전달 특성

  • 안수환 (경상대학교 수송기계공학부 해양산업연구소) ;
  • 이병창 (경상대학교 대학원) ;
  • 김원철 (경상대학교 수송기계공학부 해양산업연구소) ;
  • 이윤표 (한국과학기술연구원)
  • Published : 2002.04.01
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Abstract

The commercial viability of heat exchanger is mainly dependent on their long-term fouling characteristics because the fouling increases the pressure loss and degrades the thermal performance of a heat exchanger. An experimental study was performed to investigate the characteristics of fluid flow and heat transfer in a fluidized bed heat exchanger with circulating various solid particles. The present work showed that the drag force coefficients of particles in the internal flow were higher than those in the external flow, in addition, the solid particle periodically hitting the tube wall broke the thermal boundary layer, and increased the rate of heat transfer. Particularly when the flow velocity was low, the effect was more pronounced.

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References

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