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자료유형
학술대회자료
저자정보
정재진 (두산중공업) 송정일 (창원대학교)
저널정보
한국태양에너지학회 한국태양에너지학회 학술대회논문집 한국태양에너지학회 2009년도 추계학술발표대회 논문집
발행연도
2009.11
수록면
259 - 264 (6page)

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연구배경
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Most of the fossil power plants firing lower grade coals are challenged with maintaining good combustion conditions while maximizing generation and minimizing emissions. In many cases significant derate, availability losses and increase in unburned carbon levels can be attributed to poor combustion conditions as a result of poorly controlled local fuel and air distribution within the boiler furnace. The poor combustion conditions are directly related to the gas flow deviation in upper furnace and convection tube-bank but a less reported issue related to in large-scale opposed wail fired boilers. In order to develop a on-line combustion monitoring system and suggest an alternative heat flux estimation method at tube bank, which is very useful information for boiler design tool and soot blower optimizing system, field test was conducted at operating power boiler. During the field test the exhaust gases' temperature and tube metal temperature were monitored by using a spatially distributed sensors grid which located in the boiler's high temperature vestibule region. At these locations, the flue gas flow is still significantly stratified, and air in-leakage is minimal which enables tracing of poor combustion zones to specific burners and over-fire air ports. Test results showed that the flue gas monitoring method is more proper than metal temperature distribution monitoring for real time combustion monitoring because tube metal temp. distribution monitoring method is related to so many variables such as flue gas, internal flow unbalance, spray etc.. Heat flux estimation at tube bank with flue gas temp. and metal temp. data can be alternative method when tube drilling type sensor can't able to use.

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Abstract
1. 서론
2. 연구배경 및 관련 이론
3. 실증시험 방법 및 결과
4. 결론
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UCI(KEPA) : I410-ECN-0101-2009-563-019115416