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The defense date of the thesis is 2005-07-14
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URN etd-0714105-003732 Statistics This thesis had been viewed 1668 times. Download 20 times. Author Tseng-hsien Tsai Author's Email Address firstname.lastname@example.org Department Mechanical Engineering Year 2004 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 95 Title Numerical Analysis and Design of Three-Dimensional Flow Channel in a PEMFC Keyword numerical simulation PEMFC proton exchange membrane fuel cell proton exchange membrane fuel cell PEMFC numerical simulation Abstract In this study, numerical analysis of the performance of the proton exchange polymer fuel cell (PEMFC) has been performed. Numerical methods were applied to predict mass distribution, velocity field, and current density distribution in the PEMFC. The effects of flow channel design were also discussed in this study. In this study, four different flow channel designs are investigated and compared and the I-V characteristic of the fuel cell was presented. The computer fluid dynamic software , , was used to simulate the three-dimensional flow, mass, and current fields inside the fuel cell.
Based on , the Navier-Stokes equations coupled with the energy, species, and the electrochemical equations were solved in this study. The SIMPLEC algorithm with finite volume based scheme was used in this numerical analysis.
Results show that the flow characteristic in interdigitated is better than straight flow and the concentration of oxygen in the cathode exhibits significant effects on the cell performance. The concentration over-potential increased while the failure to transport sufficient oxygen to the catalyst, oppositely the cell performance increased as the inlet pressure concentration of the reactant are increased. The results also show the Interdigitated type channel have the best output performance.
Advisor Committee Chin-hsiang Cheng - advisor
Files Date of Defense 2005-07-04 Date of Submission 2005-07-14