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

  • 제20권9호
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  • Pages.581-589
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  • 2008
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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

보일러 Windbox내 공기공급 계통의 유량분포 해석

Analysis of Air Distribution in the Windbox System of the Utility Boiler

  • 박호영 (한전 전력연구원 신발전연소그룹) ;
  • 김성철 (한전 전력연구원 신발전연소그룹)
  • 발행 : 2008.09.10
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초록

The pulverized coal combustion behavior in the utility boiler is very complex since so many physical and chemical processes happen in it, simultaneously. The mixing of pulverized coal with combustion air plays an important role in achieving the efficient combustion and stable boiler operation. The distribution of combustion air supplied to the furnace through the windbox damper system has not been clearly known since the individual measurements of air flow for each air nozzle were not possible, yet. The present study describes the CFD modelling of windbox damper system and aims to obtain the air flow rates and pressure loss coefficients across the present five damper systems, respectively. The one dimensional flow network model has been also established to get air flow distributions across the windbox damper, and applied to the actual plant operation condition. Compared with the designed air flow distribution, the modelled one gives a reasonable agreement. For the actual plant operation, the predicted air flow distribution at each air nozzle is differed with the designed data and strongly affected by the individual opening angle.

키워드

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