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형상변화가 PEM 연료전지 개방형 양극의 유동 특성에 미치는 영향에 대한 수치해석적 연구
이재준(Jae-Jun Lee),전지아(Ji-A Jeon),송영수(Young-Su Song),김민수(Min-Su Kim),유승재(Seong-Jae You),나영승(YoungSeung Na) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12
Hydrogen fuel cells, which use hydrogen and oxygen to generate electricity, are receiving much attention from many industries. Researches are underway to mount them into drones. Generally, hydrogen fuel cell systems for drones are need to be lighter for flight time. Therefore, a light-weight fan is commonly used rather than a relatively heavy air compressor. However, in the case of fan, a large pressure drop in the flow path may result in air blocking in the flow path of the hydrogen fuel cell. In addition, the air flow varies depending on the position and shape of each channel inside of the hydrogen fuel cell. This flow imbalance results in an inconsistent electrochemical reaction within the fuel cell. These problems soon lead to a reduction in fuel cell performance, which directly leads to a decrease in flight time. Therefore, an analysis of the pressure drop depending on the shape of the fuel cell channels and constant distribution of the flow rate for each channel can be expected to increase the flight time. In this paper, we conducted a numerical study on the variation of flow characteristics and pressure drop depending on the shape of the channel of hydrogen fuel cell for drones.