다공성 가스확산층의 국부적 변형을 고려한 금속 분리판 내 사행 유로 통합 전산 해석Unified mechanical and fluidic analyses of serpentine channel flows in metallic bipolar plates under the influence of locally deformed porous gas diffusion layers
- Other Titles
- Unified mechanical and fluidic analyses of serpentine channel flows in metallic bipolar plates under the influence of locally deformed porous gas diffusion layers
- Authors
- 김아름; 정혜미; 엄석기
- Issue Date
- May-2013
- Publisher
- 한국자동차공학회
- Keywords
- Serpentine channel(사행유로); Local deformation(국부 변형); Bypass flow(우회유동); Porous gas diffusion layer(다공성 가스확산층); Metallic bipolar plate(금속분리판)
- Citation
- 2013 KSAE 부문 종합학술대회, pp.1916 - 1921
- Indexed
- OTHER
- Journal Title
- 2013 KSAE 부문 종합학술대회
- Start Page
- 1916
- End Page
- 1921
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/162741
- Abstract
- Unified conceptual systems of structural and flow dynamics are introduced to predict effects of porous gas diffusion layer (GDL) deformation on performance of polymer electrolyte fuel cells (PEFCs) by computational approaches. Static analysis is first performed to obtain local variations of GDL by stacking pressures. A number of case studies with selected key design parameters are conducted to figure out mechanical characteristics of GDLs contacting metallic bipolar plates. Successively, it is possible to apply the volumetric changes of the compressed GDLs to determine fluidic characteristics in serpentine gas supplying channels with trapezoidal cross-section area on the metallic plates. One of the distinctive features of the present study is the concept of bypass flow through the GDLs by the flow resistance difference over the entire computational domain. Channel flows in the metallic bipolar plates are investigated using a simplified theory based on entropy generation minimization theories. These multi-disciplinary modeling efforts are well suited for evaluating the fluidic performance of PEFCs and further applied to develop the optimized metallic bipolar plate designs.
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