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조상원,김영식 한국환경보건학회 2002 한국환경보건학회지 Vol.28 No.5
We have studied that the prediction of desulfurization efficiency by limestone in fluidized-bcd coal combustor. The results were presented as follows: Firstly. the bed temperature had a great deal of effect on the desulfurization and the optimum temperature of limestone was 850℃-900℃. Secondly. as the velocity and temperature increased. k. K and the desulfunzation efficiency increased. So. Ks Kd highly depended on the air velocity and bed temperature. and Ks Kd were 82.53 mm/sec 0.0041/sec at 0.2 m/sec. 850℃. Ks Kd were 125.62 mm/sec. 0.00532/sec at 0.3 m/sec. 800℃ respectively. And Ks Kd were 143.78 mm/sec. 0.OO568/sec at 0.3 m/sec. 850 C. Thirdly. as a result of desulfurization modeling. there was good agreement between theory and experiments as anthracite fraction inereased. At 3.0 of optimum Ca/S molar ratio. there was very good agreement between theory and experiments.
조상원,오광중 한국환경과학회 2002 한국환경과학회지 Vol.11 No.10
The objectives of this study were to investigate the desulfurization kinetics of paper sludge and limestone in a fluidized bed reactor according to bed temperature and air velocity. The experimental results were presented as follows ; First, the bed temperature had a great influence on the desulfurization efficiency of limestone and paper sludge. In paper sludge, the optimum condition in desulfurization temperature was at 800℃ and in limestone, that was at 850℃ or 900℃. Second, as air velocity increased, the desulfurization efficiency(or the absorbed amount of sulfur dioxide) by limestone and paper sludge decreased. And the absorbed amount of sulfur dioxide by paper sludge was larger than that of by limestone. Third, as the velocity increased and the optimum desulfurization temperature became, ks and the removal efficiency increased. So, ks, kd highly depended on the air velocity and bed temperature.
조상원,조지성,이인원 한국지진공학회 2000 한국지진공학회논문집 Vol.4 No.1
본 연구에서는 비비례 감쇠시스템을 효율적으로 해석할 수 있도록 모드 가속도법(mode acceleration method)과 모드 절삭 보강법(modal truncation augmentation method)을 확장하고 그 사용성을 검증하였다,. 비례 감쇠시스템의 동응답해서에 널리 사용되는 모드 가속도법과 모드 절삭보강법은 누락된 고차모드의 영향을 보정하여 모드 중첩법의 결과를 개선하는 방법이다. 기존의 방법들로 비비례 감쇠시스템을 해석하는 경우 비비례 감쇠특성을 무시하지 않으며 정확하고 효율적으로 해석할 수 있도록 모드 가속도법과 모드 절삭보강법을 확장하였다. 비례 감쇠시스템에서는 모드 가속도법보다 모드 절삭보강법이 더 효율적인 반면에 비비례 감쇠시스템에서는 대부분의 경우에 있어서 확장된 두 방법의 효율성이 동일하다. 그러나 수치적 안정성은 확장된 모드 가속도법이 모드절삭 보강법보다 우수하다. 이와 같은 확장된 모드 가속도법과 모드 절삭보강법의 사용성 검?을 위해서 이론적 방법과 수치예제를 수행하였다.