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이시훈,이종민,Lee, Si-Hun,Lee, Jong-Min 한국전력공사 2016 KEPCO Journal on electric power and energy Vol.2 No.2
The increase of world's population and economic development are the keys drivers behind growing demand for energy. Especially the demand for electricity would eventually result in an increase of coal usage. Therefore ultra supercritical circulating fluidized bed boiler has been developed as solutions of economic eco-friendly technologies for coal and of increasing supplies of low grade fuels. Ultra supercritical circulating fluidized bed boiler has an once through type of steam cycle different from drum type in subcritical circulating fluidized bed boiler. Also, the duplication of a proven commercial module with 100-300 MWe subcritical circulating fluidized bed might be the key for design of 500~800 MWe ultra supercritical circulating fluidized bed boiler. After 2017, ultra supercritical circulating fluidized bed boiler might become standard model over subcritical circulating fluidized bed boiler. Therefore, this paper will help you to understand ultra super critical circulating fluidized bed (USC-CFB) through describing the background, status and prospect of the CFB technology. 전세계의 인구 증가와 경제 발전은 지속적인 에너지 수요의 증가를 가져오고 있다. 특히, 전력부분에서는 아시아 및 아프리카, 그리고 중남미 등의 개발도상국을 중심으로 그 수요가 지속적으로 증가하고 있어 주요 에너지원인 석탄의 이용도 지속적으로 증가할 것으로 예측되고 있다. 그러나, 이산화탄소 및 대기오염원, 그리고 미세먼지 등의 배출 등은 석탄을 이용한 전력생산에 있어 환경친화적인 기술로의 대응방안 마련과 더불어, 고효율의 다양한 저급연료를 활용할 수 있는 발전 기술의 개발이 요구되고 있다. 이에, 기술개발 및 그 상용화 시장이 점차 증대되고 있는 초초임계 순환유동층 보일러에 대한 관심이 증대하고 있다. 초초임계 순환 유동층 보일러는 중소형의 아임계의 드럼형 구조에서 벗어나 대용량화의 기본 구조인 Once Through 형태의 증기 순환 구조를 지니고 100-300 MWe의 상업용 모듈의 복제를 통해 600 MW급이 상용화 운전 중에 있으며, 향후 설계가 완성된 800 MWe의 상업화 진행이 기대되고 있다. 초초임계 순환유동층 보일러는 2017년 이후 아임계 순환유동층 보일러 설치 용량을 추월하여 표준형 모델이 될 것으로 전망되고 있어, 본 논문에서의 이의 기술적 배경과 개발 현황 그리고 시장전망 등을 통해 기술적 이해를 도모하고자 한다.
이시훈(Si-Hun Lee),명차리(Cha-Lee Myung),윤종석(Jong-Seok Yoon) 한국자동차공학회 1993 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Recently, flexible fuel vehicle (FFV) has drawn great attention because of its response for<br/> immediate use as altemative fueled one. This vehicle can be operated on arbitrary fuel mixtures between gasoline and M85 with the specially programmed electronic control unit (ECU) which can determine optimized fueling Quantity and ignition timing as the methanol content by the signal from electrostatic type fuel sensor. Hyundai Motor Company which has been developing FFVs for last five years is currently in the stage of field trials of several FFYs. In this paper, the results and experiences of field test which has been performed from May, '92 to Nov.. '92 are described including used oil analysis, conversion efficiency test with 5 k aged MCC and vehicle emission test. As the test results, serious durability problems have not<br/> been observed under the general driving conditions. Total mileage accumulated during the test period is 13.1 k mile (21,000 km).<br/>
광섬유 장착 점화플러그와 이온 프로브에의한 화염전파측정
지명석(Myoung-Seok Jie),이시훈(Si-Hun Lee),이경환(Kyung-Hwan Lee) 한국자동차공학회 1994 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1994 No.11_1
The optimized fuel injection timing during intake stroke is very important to extend the lean misfire limit of lean bum system. The effects of fuel injection timing on the combustion characteristics were investigated with a single cylinder 4 valve DOHC engine with lean bum system. The fiber optic spark plug and printed circuit board head gasket ionization probe were applied to obtain the flame kernel growth rate and convection velocity in the vicinity of spark plug and flame propagation characteristics in the end zone of combustion chamber. The pressure in the combustion chamber was also measured to understand the combustion characteristics such as initial burn duration and main bum period and compared with the flame propagation.<br/> It was found that in case of 1 valve open, the flame propagation measured by the fiber optic spark plug was consistent with the expected charge motion. The optimized fuel injection timing which has more extended lean misfire limit also showed maximum flame kernel growth rate.<br/>