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정진도(J D Chung),구경완(K W Koo),김장우(J W Kim),신태용(T Y Shin),설진호(J H Seol),권영석(Y S Kwon),이종연(J Y Lee) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.10
환경기초시설에서 발생하는 바이오가스 중 주종을 이루고 있는 일산화탄소와 메탄가스는 대표적인 온실가스로 분류 되고 있으며, 폭발 위험성을 내포하고 있고, 암모니아, 황화수소 등의 악취 및 유해성물질을 함유하고 있다. 따라서 이러한 가스를 사전에 처리할 필요성이 있다. 본 연구에서는 환경기초시설에서 발생되는 CH₄, CO₂, H₂S의 발생량을 조사하고 발생하는 바이오가스를 이용하여 고체전해질 연료전지로 활용하였을 경우를 분석 및 조사하여 환경기초시설의 바이오가스의 활용도 및 에너지 효율을 높이고자 한다.
정진도 ( J. D. Chung ),김장우 ( J. W. Kim ),서문준 ( J. Seommun ) 한국분무공학회 2010 한국액체미립화학회지 Vol.15 No.4
This paper has designed a mixing enhancement apparatus called Lobed-plate and Step-plate and comparatively calculated desulfurization efficiency of when its shape was changed. The parameters used at this time were the shape, SR ratio and the number of nozzles of the mixing enhancement apparatus and comparatively analyzed desulfurization efficiency according to these parameters. As a result, the Step-plate appeared as more highly by around 4% than Lobed-plate in desulfurization efficiency according to the shape of the mixing promotion apparatus, and when the desulfurization efficiency as a SR ratio is considered, it appeared highly by an average of 5% when the SR ratio is 3 rather than 2. As a result of comparing desulfurization efficiency by fixing the SR ratio and setting the number of nozzles as 4 pieces and 6 pieces, there was no big change in desulfurization efficiency when the SR ratio is 2, but it could be confirmed to improve by around 5% when the SR ratio is 3 when time passed 8 seconds.
김장우,권병철 한밭대학교 생산기반기술연구소 2001 생산기반기술연구소 논문집 Vol.1 No.1
This Paper presents numerical solutions of the Euler equations for supersonic unsteady flows in a two-dimensional simple Scramjet model with heat addition. The Van Leer FVS(flux vector splitting) method in generalized coordinates is employed in order to calculate inviscid strong shock waves caused by thermal choking. Results show that the adverse pressure gradient induced by heat addition brings about formation of the normal shock wave and the specific thrust decreases with fluctuation. We prove that thermal choking is a serious problem for engine Performance.