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연료전지 차량용 냉각수 온도 제어 밸브의 유동 특성에 관한 해석적 연구
이준용(Junyonng Lee),허형석(Hyungseok Heo),배석정(Sukjung Bae),김서규(Seokyu Kim),권오성(Ohsung Kwon) 한국자동차공학회 2018 한국자동차공학회 학술대회 및 전시회 Vol.2018 No.11
The hydrogen fuel cell is a power source for supplying electric power of an electric vehicle battery. It is possible to solve the mileage problem of the electric vehicle. In the hydrogen fuel cell, the conductivity of electrons changes in accordance with the state of the electrolyte in the stack. Therefore, the thermal management system of hydrogen fuel cell is very important. The wax type thermostat attached to the existing radiator is difficult to sensitively control the temperature of the fuel cell system because of its low control accuracy with low responsiveness. It is necessary to develop a motor-driven valve that can replace wax type thermostat. In this research, we developed a valve which can actively control the temperature of coolant flowing in the stack. A 3-layer bell valve with a single drive shaft controls the flow rates to the components according to the power of the stack. Flow-rate distribution ratio characteristics and flow resistance in the fuel cell system were verified by porous media method applying the flow resistance experiment data of the componests.