• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 1999.05a
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• pp.55-61
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• 1999

최근 국내외적으로 지구온난화, 산성비, 오존층파괴 등의 환경문제가 심각하게 대두되기 시작하면서 화석연료 사용에 대한 규제가 점차적으로 강화되고 있다. 이와같은 상황에서 기존의 미분탄 화력발전시스템에 비해서 NOx, SOx, $CO_2$, 분진 등의 대기오염물질을 현저히 줄일 수 있으며 발전효율도 높아서 석탄 사용에 따른 지구의 환경오염 저감과 에너지의 효율적인 이용 측면에서 석탄가스화 복합발전 시스템은 청정석탄 이용기술로 크게 관심을 모으고 있어서 국내외적으로 관련연구가 활발히 진행중이다.(중략)

• Nuclear industry
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• v.24 no.5 s.255
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• pp.74-85
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• 2004

• JOURNAL OF ELECTRICAL WORLD
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• no.2 s.26
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• pp.46-55
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• 1979

• 열병합발전
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• s.23
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• pp.3-15
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• 2001

• JOURNAL OF ELECTRICAL WORLD
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• no.11 s.107
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• pp.4-10
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• 1985

• Plant Journal
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• v.9 no.1
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• pp.36-42
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• 2013

In this study, repowering scenarios are analyzed and evaluated from the economical point of view on a case by case basis. Based on the result of evaluation, the IRR indicates 2.34% on single 750 MW LNG combined cycle unit, 3.56% on 500 MW sub-bituminous PC units and 2.31% on 200 MW circulating fluidized bed combustion units, resulting in not reaching 7% rate of discount rate and being concluded uneconomical. However, proposes that it is most economical and feasible to repower power plant into 750 MW LNG combined cycle unit as long as the economic feasibility can be improved and it is necessary for old anthracite power plant to be repowered than rebuilt under the circumstances of lacking power supply.

• Economic and Environmental Geology
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• v.52 no.2
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• pp.141-158
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• 2019

The quantity of heavy metals in agricultural surface and subsurface soils around coal-fired power plants located in Samcheonpo and Hadong, Gyeongnam Province, were determined. The analytical results for 48 and 61 soils in Samcheonpo and Hadong, respectively, showed that the concentrations of Cu, Hg, Ni, Pb, and Zn were below the warning criteria regulated by Korean Soil Conservation Act; however, Cd in 38 and 13 soils in Samcheonpo and Hadong, respectively, exceeded the criterion. As a result of calculation of the geoaccumulation index and the enrichment factor, the soils were extremely contaminated with Cd and such high loading of Cd to the soils was due to anthropogenic source(s). Sequential extraction of the soils, however, showed that heavy metals including Cd existed as hardly extractable phases, which represented a low bioavailability of the heavy metals. Our results indicated that Cd contamination around the coal-fired power plants was due to artificial source(s) and may unlikely deteriorate nearby ecosystems.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.12 no.3
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• pp.215-220
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• 1992

The rational methods of pavement design and analysis using the resilient modulus have been increasingly adopted by major advanced countries and many researches concerning the resilient characteristics of pavement materials as well as developement of reliable testing method have been actively performed. Accordingly, fundamental researches on the resilient modulus characteristics of domestic subgrade soils are very important. With want of aggregate due to the national constuction projects, it is siginificant to examine on the utilization of coal ash as pavement materials. The purpose of this study is to examine resilient modulus characteristics and to evaluate the relationship between MR and CBR by AASHTO testing method. The materials for this investigation are Coal Ash (Fly Ash, Bottom Ash) from 5 thermal-power-plants and 4 decomposed-granite-soils from central regions of Korea.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.1670_1671
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• 2009

산업경제구조의 변화로 경험이 풍부한 전문가들이 은퇴하고 경험이 적은 직원들이 그들의 업무를 대신하는 구조로 조직이 변화하고 있다. 동시에 녹색성장시대의 도래로 화석연료를 사용하는 설비에 대한 투자가 줄면서 점차로 노후화되는 경향을 보이고 있어 불필요한 운전 과도현상에서 기인된 극단적인 손상은 설비자체 및 전력공급계통 전체에 치명적이라고 할 수 있다. 따라서 석탄화력발전소 제어 시스템은 이러한 사안들을 안정적으로 이끌어 나가기 위한 중요한 요소로 저비용 고효율 발전소 유지를 위해 중점적으로 발전시켜 나가야 할 부분이다. 본 논문은 석탄화력발전소의 주구성요소인 보일러와 터빈을 제어하는 마스터 제어기의 복잡한 로직을 모델 기반의 간단한 로직으로 개발하여 시뮬레이션 한 결과를 실제 발전소에 적용하기 위한 내용을 기술하였다. 실제 발전소는 많은 위험요소들을 안고 있기 때문에 시뮬레이션에서 나타나는 급격한 제어동작을 수용할 수 없을 경우도 있으며, 실제 다른 많은 변수들이 제어불안정 요소로 작용할 수 있다. 차후 실제 적용한 결과는 예측제어의 사용과 같은 제어시스템 향상을 위한 개발과 운영효율 향상에 사용될 것이다. 튜닝 과정에서의 연구결과는 시간절약과 제어부분 결함제거 등 직원들의 전문지식 향상 등에 도움을 주게 될 것이다.

• Journal of Energy Engineering
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• v.23 no.4
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• pp.49-55
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• 2014

In this study, boiler tube thickness measurement and numerical analysis were conducted for standard 500MW coal-fired power plant in order to research the mechanism of tangential-fired boiler corrosion empirically. The most dominant corrosion mechanism of tangential-fired boiler waterwall was corrosion by sulfur contained in the unburned carbon. And the secondary mechanism was $H_2S$ gas corrosion at localized reducing atmosphere. It is required to decrease the air-stage combustion operation in order to mitigate the waterwall tube corrosion. Also stringent coal pulverization quality control and reinforcing work for corrosion susceptible area such as anti-corrosion coatings is required