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셀 표면의 충돌제트를 이용한 태양광발전 시스템 효율향상에 관한 연구
유상필(Yoo Sang-Phil),진주석(Jin Joo-Seok),김혁균(Kim Hyuk-Kyun),김이현(Kim Yi-Hyun),정성대(Jeong Seong-Dae),서용석(Seo Yong-Seo),정남조(Jeong Nam-Jo) 한국태양에너지학회 2009 한국태양에너지학회 학술대회논문집 Vol.- No.-
This study is focused on the improving effectiveness of a photovoltaic system. The characteristic of crystalline silicon solar cells, that 0.5% reduction in generating power is occurred by increasing temperature 1℃ of module. Typically, average solar generating power is higher spring and fall than summer. Degradation phenomena shall shorten the life of the module when the temperature of modules is 70℃. Decreasing temperature 40degree of the module and increasing the solar power 20% was presented using the water impinging jet method on the surface of photovoltaic cells. It is shown that Impinging jet have an effected on heat and deliver effective substance from the area in which the injection is effective.
고분자 전해질 연료전지의 매니폴드 및 분리판 유동분배 특성 분석
조중원(Cho, Chung-Won),유상필(Yoo, Sang-Phil),김민진(Kim, Min-Jin),이원용(Lee, Won-Yong),김창수(Kim, Chang-Su) 한국신재생에너지학회 2006 한국신재생에너지학회 학술대회논문집 Vol.2006 No.11
A numerical study is made of a manifold and bipolar plate in polymer electrolyte fuel cells, the aim of the present study is to describe the characteristics of flow pattern In manifold and bipolar plate. The present work shows that the flow pattern in the bipolar plate is affected by the penetration flow through GDL characterized by clamping pressure and GDL intrusion in to a channel area. Manifold geometry also affects the flow distribution. The recirculation flow by bent duct destroy even distribution In manifold, the present work shows that corner rounding can improve the manifold performance.