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셀 표면 냉각에 의한 태양광발전 시스템 효율향상에 관한 연구
진주석(Joo-Seok Jin),유상필(Sang-Phil Yu),김혁균(Hyuk-Kyun Kim),김이현(Yi-Hyun Kim),정성대(Seong-Dae Jeong),서용석(Yong-Seog Seo),정남조(Nam-Jo Jeong) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
The crystalline silicon soler cell was one of the first to be developed end it is still the most widely used type. The photovoltaic cells will exhibit long-tenn degradation if the temperature exceed a certain limit. The purpose of this study is to investigate the possible of improving the performance of a photovoltaic cooling system. According to the results of the experiment, the thermal degradation of 44.63 degrees was observed by cooling on the surface of photovoltaic cells. It is a decrease of 22.215percent of generating power. It is shown that photovoltaic cooling system is effected on improving the effectiveness of a photovoltaic out of power.
정량펌프내부 리필밸브의 개폐 간극에서 발생하는 압력강하 해석
진주석(Joo-Seok Jin),김상우(Sang-Woo Kim),신태석(Tae-Seok Sin),이도형(Do-Hyung Lee) 한국유체기계학회 2008 유체기계 연구개발 발표회 논문집 Vol.2008 No.-
A three-dimensional numerical analysis was carried out on incompressible flows in the refill valve of check valve type containing ball by using commercial code. A numerical simulation is a useful technique to investigate the physical phenomena of the flow field. This study focused on the flow analysis in the tiny gap between valve body and ball in order to prevent pressure drop of refill valve. Characteristics of complex flows including cavitation effect investigated for different gap's size. when length of tiny gap's size become smaller, speed of fluid is rising rapidly and pressure is on the ebb by Bernoulli's theorem. while the pressure fall off below the saturation vapour pressure, we can saw that happening the cavitation phenomenon in this research.
태양광발전 시스템 효율향상을 위한 셀 표면 냉각에 관한 연구
진주석(Jin, Joo-Seok),유상필(Yu, Sang-Phil),김이현(Kim, Yi-Hyun),정성대(Jeong, Seong-Dae),서용석(Seo, Yong-Seog),정남조(Jeong, Nam-Jo) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.06
The crystalline silicon solar cell was one of the first to be developed and it is still the most widely used type. The photovoltaic cells will exhibit long-term degradation if the temperature exceed a certain limit. The purpose of this study is to investigate the possible of improving the performance of a photovoltaic cooling system. According to the results of the experiment, the thermal degradation of 44.63degrees was observed by cooling on the surface of photovoltaic cells. It is a decrease of 22.215percent of generating power. It is shown that photovoltaic cooling system is effected on improving the effectiveness of a photovoltaic out of power.
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.
김현구(Hyungo Kim),김상우(Sangwoo Kim),진주석(Jooseok Jin),이도형(Dohyung Lee) 한국유체기계학회 2008 유체기계 연구개발 발표회 논문집 Vol.2008 No.-
The roles of Micro fluidic devices have become more important in micro-system industries because of mass production of micro-components for most application. Especially micro protein chip, used to diagnosis human disease, must bo able to control the flow rate for successful medical examination. In this study, micro channel with bank angles(60°, 70°, 80°, 90°) of protrusion are considered. Numerical analyses have been performed to figure out the angle effects on the flow rate. Piecewise Linear Interface Construction-Volume of Fluid (PLIC-VOF) method has been used for the numerical simulation of gas-liquid flows with an explicit tracking of the phase interface. The numerical results show that the surface chemistry and bank angle of protrusion are appeared to be a dominating factor of the flow process. According to this study, the accumulated information about micro channel flow rate control is expected to be widely utilized in micro-TAS and bio-chemical industries.