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임효재(Hyo Jae Lim),권정태(Jung Tae Kwon),김금수(Geum Soo Kim),장기창(Ki Chang Chang) 대한설비공학회 2009 대한설비공학회 학술발표대회논문집 Vol.2009 No.-
Geothermal energy is the heat contained in the earth and its internal fluids. Geothermal energy is stored as sensible or latent heat. Supplied by both internal and external sources, it represents a vast supply which is only started to be tapped for generation of electric power. In general, this is natural dry or wet medium to high enthalpy steam at temperatures above 150℃. For some time, binary systems employing substances with a lower boiling point than water in a secondary circuit have been used to generate vapor for driving turbines at a lower temperature level. The utilization of binary plants and the possibility of production from enhanced geothermal systems can expand its availability on a worldwide basis. The geothermal electricity installed capacity is approaching the 10,000GW threshold. Geothermal energy is not present everywhere, but its baseload capability is a very important factor for its success.
일부주택에서의 공기청정기에 의한 실내공기 오염물질 성능평가
박현진(Park, Hyun Jin),권정태(Jung-Tae Kwon),손종렬(Jong-Ryeul Sohn),우완기(Wan-Gi Woo),김경기(Kyung-Ki Kim) 한국환경관리학회 2011 環境管理學會誌 Vol.17 No.2
In this study we have measured the concentration of PM-10, TVOC and microorganisms contained in the indoor air by measuring the indoor air in 5 different apartments with the aim of removal performance evaluation of the air cleaner. After measuring the initial concentration, its variation as function of time was observed by measuring the concentration after 2, 4, 6, and 8 days of operation. Viewing the results from the measurement in 5 apartments, for each pollutant the average decrease rate was found to be between 57% and 83% after the air cleaner started operating.
김민석(Min-Seok Kim),김정현(Jung-Hyun Kim),전문호(Mun-Ho Jeon),김창업(Chang-Eob Kim),김서현(Seo-Hyun Kim),권정태(Jeong-Tae Kwon) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.4
This paper presents the MHD characteristics of the liquid metal flow. The electromagnetic force was calculated by the equivalent circuit method. This Lorentz force was used as a source term for the fluid flow equations. The modified Navier-Stokes equation was solved to give the velocity distributions of the liquid metal flow.
최재호(Jae Ho Choi),임효재(Hyo Jae Lim),김창업(Chang Eob Kim),권정태(Jung Tae Kwon) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
This study aims at analyzing the flow characteristics of the electromagnetic pump using a linear induction motor (LIM) for transferring molten metals. The flow characteristics of the pump are simulated by magnetohydrodynamic(MHD) program. In this system, the LIM is used for transferring molten metal by electromagnetic force. The molten metal is treated as the secondary part of the LIM. Since the LIM produces an electromagnetic force in the duct, the molten metal can flow from the furnace to the reservoir. The flow characteristics of the pump are analyzed using MHD program for magnetic field of 0.1[T] in duct. In order to prove the analysis, we made a prototype electromagnetic pump using LIM.