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캐소드 유로에서 블록과 서브 채널의 고분자전해질 연료전지의 성능에 관한 전산해석 연구

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Alternative Title
Numerical Study on Performance of PEMFC with Block and Sub-channel of Cathode Flow Field
Abstract
A flow channel shape of PEMFC has an influence on the internal flow uniformity. If the reactant distribution in a flow path
is not uniform during operation, both catalyst deactivation and mechanical damage of membrane could occur resulting in decreasing
the membrane electrode assembly (MEA) durability. Numerous studies concerning flow design have been conducted
to make smooth supply and uniform distribution of reactants in fuel cells. The baffle of flow path could improve fuel cell
performance through the forced convection effect. A sub-channel, as an additional air flow path, could increase the reactant
concentration and reduce the mass transfer loss via a smooth water discharge. In this study, computational fluid dynamics
(CFD) was used to analyze the effect of blocks and sub-channels on the current density and oxygen concentration of the
fuel cell. As a result, the limit current density and oxygen concentration at a rear block increased when using blocks and
sub-channels in a flow channel. In particular, the current density increased significantly when the sub-channel was placed
between two blocks. Also, the sub-channel position was optimized by analyzing the oxygen concentration, and the oxygen
concentration was recovered at a rear block in the fuel cell.
Author(s)
김준범조성훈
Issued Date
2021
Type
Article
Keyword
PEMFCNumerical analysisBaffle blockageSub-channelOxygen concentration
URI
https://oak.ulsan.ac.kr/handle/2021.oak/9249
https://ulsan-primo.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=TN_cdi_nrf_kci_oai_kci_go_kr_ARTI_9919725&context=PC&vid=ULSAN&lang=ko_KR&search_scope=default_scope&adaptor=primo_central_multiple_fe&tab=default_tab&query=any,contains,%EC%BA%90%EC%86%8C%EB%93%9C%20%EC%9C%A0%EB%A1%9C%EC%97%90%EC%84%9C%20%EB%B8%94%EB%A1%9D%EA%B3%BC%20%EC%84%9C%EB%B8%8C%20%EC%B1%84%EB%84%90%EC%9D%98%20%EA%B3%A0%EB%B6%84%EC%9E%90%EC%A0%84%ED%95%B4%EC%A7%88%20%EC%97%B0%EB%A3%8C%EC%A0%84%EC%A7%80%EC%9D%98%20%EC%84%B1%EB%8A%A5%EC%97%90%20%EA%B4%80%ED%95%9C%20%EC%A0%84%EC%82%B0%ED%95%B4%EC%84%9D%20%EC%97%B0%EA%B5%AC&offset=0&pcAvailability=true
Publisher
공업화학 (Appl. Chem. Eng.)
Location
대한민국
Language
한국어
ISSN
1225-0112
Citation Volume
32
Citation Number
6
Citation Start Page
613
Citation End Page
620
Appears in Collections:
Engineering > Chemical Engineering
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