• Proceedings of the Korean Society of Precision Engineering Conference
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• 2010.05a
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• pp.773-774
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• 2010

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 2010.04a
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• pp.138-138
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• 2010

• 한국가스학회:학술대회논문집
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• 2005.05a
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• pp.213-213
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• 2005

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.23 no.2
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• pp.125-130
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• 2009

With respect to the goal of achieving at least 50[%] reduction of global emissions by 2050, the G8 leaders agreed to seek to share and adopt it with all Parties to the UNFCCC in the 34th Group of Eight Summit held in Toyako, Japan in July 2008. Korea is also expected to obey the Kyoto Protocol starting in 2013, which will result in a serious shock especially to the electric power industry. The power plants burning the fossil fuel produce more than 20 percent of national $CO_2$ emission. This paper presents an economic feasibility study on fuel transfer for a thermal power plant considering $CO_2$ emission cost. Calculation of the breakeven point for the fuel transfer from LNG to heavy oil of D power plant is demonstrated using the input-output coefficients obtained by the performance test.

• Journal of Bio-Environment Control
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• v.19 no.4
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• pp.177-183
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• 2010

Bum-type $CO_2$ generators are widely used in greenhouses for the purpose of $CO_2$ supply for photosynthesis and greenhouse heating. However harmful gases included in the air might give severe effects on the plant growth. For investigating the possible emission of harmful gases from commercial bum-type $CO_2$ generators, we carried out the analysis of the harmful by-products (NO, NOx, $NO_2$, CO, and VOCs) and $CO_2$ caused by using a bum-type $CO_2$ generator in greenhouses. And the harmful by-products from different type of fuels such as kerosene, LPG, and LNG were quantified. In order to minimize the uncertainties from a $CO_2$ generator, 4 different $CO_2$ generators were utilized in four plastic greenhouses and a glasshouse located at different places during the experimental works. The results showed that the concentration of NOx is proportional to $CO_2$ concentration. Levels of harmful gases in the most of greenhouses, where the new bum-type $CO_2$ generators were installed, were lower than 1.0 ppm when $CO_2$ concentration was set at 1,000 ppm. In case of LNG combustion, the concentration of CO reached out up to 300 ppm and pre-treatment for CO reduction, such as the adsorption process, would be inevitable to abate the adverse effects on plant growth.

• Journal of Power System Engineering
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• v.9 no.2
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• pp.99-105
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• 2005

LNG Vaporizers must be smaller, more efficient, and easier to operate and maintain. Recently, the vaporizers with greatly enhanced performance as compared to conventional type, have been developed to fulfill these requirements. The vaporizing characteristic of LNG vaporizer with air as heat source has fixed ice. These characteristic has efficient down and total plant cost and installing space can be increase. On that reasons must be optimize through tube and pipes analysis and experiments with enhanced type in this study. In this study performance to the workong characteristics for air heating type vaporizer for super low temperature liquefied gas.

• Ocean Systems Engineering
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• v.2 no.1
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• pp.49-68
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• 2012

In this paper, an offshore process front end engineering design (FEED) method is systematically introduced and reviewed to enable efficient offshore oil and gas production plant engineering. An integrated process engineering environment is also presented for the topside systems of a liquefied natural gas floating production, storage, and offloading (LNG FPSO) unit, based on the concepts and procedures for the process FEED of general offshore production plants. Various activities of the general process FEED scheme are first summarized, and then the offshore process FEED method, which is applicable to all types of offshore oil and gas production plants, is presented. The integrated process engineering environment is presented according to the aforementioned FEED method. Finally, the offshore process FEED method is applied to the topside systems of an LNG FPSO in order to verify the validity and applicability of the FEED method.

• Journal of ILASS-Korea
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• v.20 no.2
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• pp.101-106
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• 2015

Gas leakage and dispersion in the underground LNG power plant can lead to serious fire and explosion accident. In this study, computational fluid dynamics simulation was applied to model the dynamic process of gas leakage and dispersion phenomena in a closed space. To analyze the risk assessment factor, such as the flammable volume ratio, transient simulations were carried out for different scenarios. The simulation results visualized the gas distribution with time in the closed space. The flammable volume ratio was introduced for quantitative analysis the fire/explosion probability.

• Proceedings of the Korea Society for Simulation Conference
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• 2003.06a
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• pp.149-154
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• 2003

경제성장과 더불어 발생되는 환경오염물질 배출의 증가로 인해 이를 규제하려는 세계적인 동향이 강화되어 이러한 환경문제를 경제 내적인 문제로 발전하고 있다. 특히 전력부문에 있어서 여러 가지 투자대안들이 환경에 미치는 영향을 고려할 경우, 각 대안들이 전력을 생산하기 위해 필요한 비용은 사회적 비용을 고려치 않는 사적인 비용과 커다란 차이가 생길 수 있다. 이에 본 연구에서는 균등화발전 원가법으로 유연탄과 LNG화력 발전의 경제성을 분석하였는데. 환경 규제상황에서 발전원간 평가를 위해 저감설비 도입비용, 탄소세, 연료비 인상, 할인율 변동에 따른 경제성 비교를 통하여 유연탄 및 LNG발전의 발전원가를 컴퓨터 시뮬레이션에 의한 민감도 분석을 통해 비교하였다.

• Bulletin of the Society of Naval Architects of Korea
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• v.21 no.4
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• pp.1-9
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• 1984

This study is concerned with the economic aspects of $125,000m^3$ class LNG carriers with different propulsion plant such as conventional steam turbine and slow speed diesel engine with reliquefaction plant. The ship's speed and L/B ratio were optimized with criterion of required freight rate(RFR) by using the PROCAL computer program package. In order to investigate the effect of fuel oil price, round trip distance and boil-off rate on the RFR and the optimum speed, sensitivity analysis were also performed.