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김우준(Kim, Woo-June),박창호(Park, Chang-Ho),조경석(Cho, Kyung-Seok),오창훈(Oh, Chang-Hoon) 한국신재생에너지학회 2007 한국신재생에너지학회 학술대회논문집 Vol.2007 No.06
FCEV uses electric energy which generated from the reaction between Hydrogen and Oxygen in fuel cell stack as driving force. As fossil fuels are exhausted, fuel cell is regarded as a potent substitute for next generation energy source, and thus, most of car-makers make every efforts to develop fuel cell electric vehicle (FCEV). In addition, fuel cell is also beneficial in aspect of environment, because only clean water is produced during chemical reaction process instead of harmful exhausted gas. Generally, Hydrogen is supplied from high-pressured fuel tank, and air blower (or compressor) supply Oxygen by pressurizing ambient air. Air blower which is driven by high speed motor consumes about 7{sim}8 % of energy generated from fuel cell stack. Therefore, the efficiency of an air blower is directly linked with the performance of FCEV. This study will present the development process of an air blower and its consisting parts respectively.
김우준(Kim, Woo-June),박창호(Park, Chang-Ho),지용준(Jee, Yong-Jun),조경석(Cho, Kyung-Seok),김영대(Kim, Young-Dae),박세영(Park, Se-Young),오창훈(Oh, Chang-Hoon) 한국신재생에너지학회 2007 한국신재생에너지학회 학술대회논문집 Vol.2007 No.11
FCEV uses electric energy generated from fuel cell stack, thus all consisting parts must be re-designed to be suitable for electricity based system. Cathode air blower which supplies compressed air into fuel cell stack has similar shape of turbocharger, but a radial turbine of traditional turbocharger is removed and high speed BLDC motor is installed . Generally, maximum 10% of electric power of fuel cell stack is consumed in air blower, therefore an effective design of air blower can improve the performance of FCEV directly. This study will present an aerodynamic design process of an air blower and compare computational results with experimental data.
김범석(Bum-suk Kim),김우준(Woo-june Kim),이상래(Sang-lae Lee),한성곤(Sung-kon Han),김만응(Mann-eung Kim) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
Rotor blade of a wind turbine is an essential component which converts wind energy into mechanical energy to generate electricity, and its aerodynamic and dynamic properties determine the performance, efficiency and stability of the whole wind turbine system. As power capacity of a single wind turbine becomes larger and to satisfy the economic efficiency in the offshore wind farm, developing a large wind turbine is required and the importance of designing a larger blade is emphasized. This paper presents the process of aerodynamic design for a 3㎿ wind turbine blade by using BEMT and conducts three-dimensional CFD analyses to evaluate the design validity. The results obtained from this study can be applied extensively for designing a larger blade which has the capacity of more than 3㎿.
배성열(Sung-youl Bae),김범석(Bum-suk Kim),김우준(Woo-june Kim),김만응(Mann-eung Kim) 한국마린엔지니어링학회 2010 한국마린엔지니어링학회 학술대회 논문집 Vol.2010 No.4
This research presents structural design processes of 3㎿ wind turbine blades and their structural safety evaluation results by FEM analysis. The blade designs were based on modem wind turbine model, which is modem FRP stressed-skin sandwich design, and three kinds of blade models were designed. After structure designs of 3 kinds of blade models were accomplished, structural safety evaluations of the models were performed by Puck's composite failure theory. The results showed that All glass model had sufficient structural safety, and carbon spar cap model could be a reasonable solution to reduce weights, tip displacements.
복합재료 고전적층판 이론을 이용한 MW급 해상풍력 블레이드 구조설계
배성열(Sung-Youl Bae),김범석(Bum-Suk Kim),이상래(Sang-Lae Lee),김우준(Woo-June Kim),김윤해(Yun-Hae Kim) 한국해양공학회 2014 韓國海洋工學會誌 Vol.28 No.2
This research presents a method for initial structural design of a multi-megawatt wind turbine blade. The structural data for a 2-MW blade were applied as the blade structural characteristic data of the reference blade. Tenkinds of blade models were newly designed by replacing the spar cap axial GRRP with a GFRP and CFRP. These terms should be defined. at different orientations. The axial stiffness coefficients of the newly designed models were made equal to the coefficient of the reference blade. The required numbers of layers in each section of blades were calculated, and the lay-up designs were based on these numbers. Verification results showed that the design method that used the structural data of the reference blade was appropriate for the initial structural design of a wind turbine blade.
박창호(Park, Chang-Ho),조경석(Cho, Kyung-Seok),김우준(Kim, Woo-June),오창훈(Oh, Chang-Hoon) 한국신재생에너지학회 2006 한국신재생에너지학회 학술대회논문집 Vol.2006 No.11
FCEV uses electric energy generated from the reaction between Hydrogen and Oxygen in fuel cell stack as driving force. As fossil fuels are exhausted, fuel cell is regarded as a potent substitute for next generation energy source, and thus, most of car-makers make every efforts to develop fuel cell electric vehicle (FCEV). In addition, fuel cell is also beneficial in aspect of environment, because only clean water is produced during chemical reaction process instead of harmful exhausted gas. Generally, Hydrogen is supplied from high-pressured fuel tank, and air blower (or compressor) supplies Oxygen by pressurizing ambient air. Air blower which is driven by high speed motor consumes about 7{sim}8% of energy generated from fuel cell stack. Therefore, the efficiency of an air blower is directly linked with the overall performance of FCEV. This study will present developing process of an air blower and its consisting parts respectively.