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논문 기본 정보

자료유형
학술대회자료
저자정보
저널정보
한국자동차공학회 한국자동차공학회 춘 추계 학술대회 논문집 한국자동차공학회 2004년 추계학술대회논문집 Vol.Ⅰ
발행연도
2004.10
수록면
538 - 543 (6page)

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초록· 키워드

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Visualization technique was used to better understand the water build-up phenomena on the cathode side of a proton exchange membrane (PEM) fuel cell. To maintain a good ionic conductivity and performance of a PEM fuel cell, the PEM should be sufficiently hydrated with proper water management. However, cathode flooding resulting from excess water can hinder the transport of reactant and hence decrease the cell performance. For the PEM fuel cell to be commercialized as vehicle or portable applications, the cathode flooding should be minimized during the operation of PEM fuel cell. In this study, a transparent PEM unit fuel cell with an active area of 25 cm2 was designed and manufactured to allow for the visualization of cathode channel with fuel cell performance characteristics. Two-phase flow due to the electro-chemical reaction of fuel cell was experimentally investigated. The images photographed by CCD camera with cell temperatures (30~ 50℃) were presented in this study. Results indicated that the flooding on the cathode side first occurs near the exit of cathode flow channel. As the fuel cell operating temperature increases, it was found that water droplets tend to evaporate easily and it can have an influence on the cathode flooding level. The approaches of this study can effectively contribute to the detailed researches on water transport phenomena including modeling water transport of an operating PEM fuel cell.

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Abstract

1.서론

2.실험 장치

3.실험 결과

4.결론

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