http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 이천성(Cheonsung Lee) (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
미분탄 연소로에서 연소특성에 미치는 석탄특성에 관한 연구
이병화(Byounghwa Lee),송주헌(Juhun Song),이천성(Cheonsung Lee),장영준(Youngjune Chang),전충환(Chunghwan Jeon) 대한기계학회 2009 大韓機械學會論文集B Vol.33 No.10
This study is to investigate the effect of the moisture, volatile matter and particle size in the coal on the pulverized coal combustion characteristics using CFD. The results show that as the moisture content in coal increases, flame temperature decreases because of heat loss driven from latent heat of vaporization and reduction of heating value. As the volatile matter content in the coal increases, the temperature in the region near the burner increases, while the temperature in rear region of boiler decreases. The solution to keep the temperature in the rear region of boiler is suggested that particle size is needed to be larger. As the particle size increases, the temperature in the rear region of boiler show tendency to increase, for combustion burning time of coal could be extended.
-
이병화(Byounghwa Lee),송주헌(Juhun Song),이천성(Cheonsung Lee),장영준(Youngjune Chang),전충환(Chunghwan Jeon) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
This study is to investigate the effect of the moisture, volatile matter and size in the coal on the pulverized coal combustion characteristics by means of a three-dimensional numerical simulation method. The results show that combustion temperature in the boiler utilizing sub-bituminous coal is entirely getting lower as the moisture content increases. When sub-bituminous coal is utilized in order to get equivalent output power in the boiler which was designed for bituminous coal, it should be considered not only heating value but cooling effect driven from increasing air and coal. The more volatile matter content in a coal is, the more combustion occurs quickly and rapidly near burner. Therefore, as the temperature near region of burner becomes high, the burner is expected to be damaged. Also, mean temperature at the elevation burner located is higher than those of other elevation, because of characteristics of volatile matter. On the other hand, temperature in the part of super-heater where is rear region of boiler is lower, for the combustion time of particle is very short. However, as the particle size increases, the temperature rear region of boiler show tendency to return back to conditions where temperature is similar to bituminous coal condition, for combustion burning time of coal can be keep longer. This implies that in order to apply sub-bituminous coal into the boiler designed for bituminous coal, enlarging pulverized coal particle size could be an alternative to maintain appropriate temperature in the rear region of the boiler.
ScienceON
DBpia연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
