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Title page for etd-0730104-153138


URN etd-0730104-153138 Statistics This thesis had been viewed 1520 times. Download 15 times.
Author Hung-Chi Hsu
Author's Email Address No Public.
Department Mechanical Engineering
Year 2003 Semester 2
Degree Master Type of Document Master's Thesis
Language zh-TW.Big5 Chinese Page Count 94
Title Study of Transport Phenomena and Optimal Design for Proton Exchange Membrane Fuel Cells
Keyword
  • conductivity
  • proton exchange membrane fuel cell
  • proton exchange membrane fuel cell
  • conductivity
  • Abstract The study is concerned with the transport phenomenon in a proton exchange membrane fuel cells(PEMFC) and the optimal parameter analysis。The research focus on the influences of different conductivities、channel ratioλ=lc/lb、porosity and thickness, numerical method is utilized to simulate the transport phenomenon in a 2-D half-cell model to obtain optimal parameters。
    The results reveal that the GDL is most important for the influences of conductivity,so we can raise the cell performance effectively by choosing high conductivity of GDL materials。Channel ratioλ would also affect the cell performance,by the results,the optimal channel ratioλis 0.65 and reach a optimal performance。The influences of the porosity is not only the diffusivity of concentration but also the valuable conductivity,as the consequences,we can know that the optimal porosity of GDL is 0.6,and the optimal porosity of catalyst layer is 0.55。In thickness,when we decrease the thickness of GDL,we can get better performance for the cell,on the other hand,the thickness of catalyst layer is thinner,so decrease it’s thickness for raising the cell performance is not obvious。
    Advisor Committee
  • Chin-Hsiang Cheng - advisor
  • Chao-Kuang Chen - co-chair
  • Chyi-Yeou Soong - co-chair
  • Fa-Lin Chen - co-chair
  • Hsin-Sen Chu - co-chair
  • Wei-Mon Yan - co-chair
  • Files indicate in-campus access only
    Date of Defense 2004-06-12 Date of Submission 2004-07-30


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