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

  • 제14권4호
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  • Pages.315-323
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  • 2002
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  • 1229-6422(pISSN)
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  • 2465-7611(eISSN)
대한설비공학회 (The Society of Air-Conditioning and Refrigerating Engineers of Korea)
권호 표지

순환유동층 열교환기내 유동과 열전달 특성

Characteristics of Fluid Flow and Heat Transfer in a Fluidized Bed Heat Exchanger

  • 안수환 (경상대학교 수송기계공학부 해양산업연구소) ;
  • 이병창 (경상대학교 대학원) ;
  • 김원철 (경상대학교 수송기계공학부 해양산업연구소) ;
  • 이윤표 (한국과학기술연구원)
  • 발행 : 2002.04.01
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초록

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.

키워드

참고문헌

  1. Korean Journal of Air-Conditioning and Refrigeration Engineering v.12 no.9 Measurement of Heat Transfer Rates and Pressure Drops in a Solid Particle Circulating Fluidized Heat Exchanger Lee K.B.;Jun Y.D.;Park S.I.
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  10. Proc. 7th International Fluidized Bed Combustion Conference v.2 Experiences of Coal Combustion in a Fast Fluidized Bed Stromberg L.
  11. Trans. KSME v.18 no.6 Heat Trnasfer to a Downward Moving Solid Particle Bed Through a Circular Tube Lee K.B.;Park S.I.
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  13. Aerosol Technology Hinds W.C.