• Title/Summary/Keyword: 전기 유동

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반도체 Burn-In 공정용 장비 개발

  • 유동상
    • 전기의세계
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    • v.46 no.10
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    • pp.33-39
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    • 1997

  • 본고에서는 Burn-In 공정의 구성 및 개발 방향에 대해 기술하고, LG생산기술원에서 지금까지 개발해 왔던 Burn-In 공정용 장비의 구성 및 특징에 대해서 기술하고자 한다.

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Design of Serpentine Flow-field Stimulating Under-rib Convection for Improving the Water Discharge Performance in Polymer Electrolyte fuel cells (고분자전해질 연료전지의 물 배출 성능 향상을 위한 촉매층 공급 대류 촉진 사행성 유동장 설계)

  • Choi, Kap-Seung;Bae, Byeong-Cheol;Park, Ki-Won;Kim, Hyung-Man
    • Journal of the Korean Electrochemical Society
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    • v.15 no.2
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    • pp.74-82
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    • 2012

  • Proton exchange membrane fuel cell performance is changed by the complicated physical phenomenon. In this study, water discharge performance of proton exchange membrane fuel cell were performed numerically to compare serpentine channel flow fields of 5-pass 4-turn serpentine and 25 $cm^2$ reaction surface between with and without sub-channel at the rib. Through the supplement of sub channel flow field, it is shown from the results that water removal characteristic inside channel improves because the flow direction of under-rib convection is changed into the sub channel. Reacting gases supplied from entrance disperse into sub channel flow field and electrochemical reaction occurs uniformly over the reaction surface. The results obtained that total current density distributions become uniform because residence time of reacting gases traveling to sub-channel flow field is longer than to main channel.

  • https://doi.org/10.5229/JKES.2012.15.2.74 인용 PDF KSCI