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초고압 차단기 연성해석을 위한 고속해석 프로그램 개발 연구
김견우(Kyoun Woo Kim),박지용(Jee Yong Park),주현우(Hyun Woo Joo),배채윤(Chae Yoon Bae),최종웅(Jongung Choi),김영근(Young Geun Kim) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
Recently, the importance of development for improvement of a reliability and a performance in the electric power systems is increasing since the electric energy consumption growth. In general, experiments and simulations are used for design evaluations. But the simulations are recommended because the experiments need a lot of money and time. However, 3D simulations of the analysis methods are difficult and time is spent a lot of. And multiphysics for analyzing various physical phenomenons at the same time is difficult to realize. In this paper, 1D simulations of most economical analysis methods were used for developing high speed analysis program. Also multiphysics were composed to associate dynamics of the mechanism with pneumatic of the CB(Circuit Breaker). And the Matlab/Simscape was used to develop to make sure of a valid reliability in a initial stage of study.
응답스펙트럼해석법을 이용한 25.8kV GIS의 내진 안전성 연구
김견우(Kyoun Woo Kim),배채윤(Chae Yoon Bae),김영근(Young Geun Kim) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
Recently, the important of the seismic safety evaluation of a large-scaled electric equipment is increasing since the electric energy consumption growth. In order to evaluate the seismic safety of large power devices such as GIS(Gas Insulated Switchgear) or equipments for electric power substations or nuclear power plants, the seismic safety evaluation has been conducted by the seismic tests or the seismic simulation. Generally, It is preferred the seismic simulation because the seismic tests of large devices need large test facilities and cost a lot. However, many parameters such as effective mass, mode, RRS(Required Response Spectrum) should be considered properly for the precise simulation. In this paper, the seismic analysis of the 25.8kV GIS producted by LS-ELECTRIC have been used the finite element method and analyzed using ANSYS Workbench.
내부 LED 광원 및 순환 장치를 이용한 수평형 미세조류 광생물반응기 개발
김견우(Kyounwoo Kim),이주은(Ju Eun Lee),이상효(SangHyo Lee),서한복(Han-Bok Seo),권태완(Tae-Wan Kwon),이승엽(SeungYop Lee) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
Recently, various microalgae have been studied for biodiesel, carbon dioxide fixation and health supplements. In order to design photobioreactors for the cultivation of microalgae, various factors are considered such as the luminous intensity, agitation, the flow rate and velocity of carbon dioxide, etc. In this study, an internally radiating photobioreactor of a horizontal cylindrical type is proposed. For the agitation and turbulence effect, the photobioreactor includes the baffle-wiper. Furthermore, using another container, it is designed to supply carbon dioxide circulate water and extract a microalgae sample easily. The designs of a pump and the baffle-wiper for the circulation and agitation are optimized by CFD analysis. The cultivation of Spirulina platensis using the proposed photobioreactor are implemented to check its growth curve.