지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2011.5
- 수록면
- 335 - 338 (4page)
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초록· 키워드
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In oxy-fuel combustion for CO₂ capture, it is important to understand the influence of increased CO₂ and H₂O concentrations on radiation for the thermal design of the boiler. This study evaluated the effect of gas and particle emissions on the wall heat flux in a simplified furnace for representative gas compositions from oxy- and air-fuel combustion using numerical simulations. The radiation was calculated by the discrete ordinate method with gaseous emission predicted by the weighted sum of gray gases models (WSGGMs).
The results show that employing an optimized WSGGM is essential for accurate prediction of wall heat flux in oxy-fuel combustion, especially for larger furnace volumes or under dry FGR conditions. With higher particle concentrations, the wall heat flux increases towards a saturation level, and is dominated by particle emission especially for large furnaces. The lower heat capacity of N₂ in air-fuel combustion leads to reduced heat flux compared to that of oxy-fuel combustion at the same volume flow rates.
The results show that employing an optimized WSGGM is essential for accurate prediction of wall heat flux in oxy-fuel combustion, especially for larger furnace volumes or under dry FGR conditions. With higher particle concentrations, the wall heat flux increases towards a saturation level, and is dominated by particle emission especially for large furnaces. The lower heat capacity of N₂ in air-fuel combustion leads to reduced heat flux compared to that of oxy-fuel combustion at the same volume flow rates.
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ABSTRACT
1. 서론
2. 전산해석 방법
3. 결과 및 토의
4. 결론
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UCI(KEPA) : I410-ECN-0101-2013-431-000555991