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標題: | 無薄膜Y型微流道過氧化氫燃料電池性能分析 Analysis of Membraneless Hydrogen Peroxide Micro Fuel Cell Performance in a Y-shaped Microchannel |
作者: | Gia-Wei Hsu 許家瑋 |
指導教授: | 陳發林 |
關鍵字: | 微型燃料電池,過氧化氫, Micro Fuel Cell,Hydrogen Peroxide, |
出版年 : | 2006 |
學位: | 碩士 |
摘要: | 本研究利用商用套裝軟體CFDRC,針對一無薄膜Y型微流道過氧化氫燃料電池流道內部傳輸與電池性能進行分析。研究以有限體積法求解各統御方程式,探討各參數改變對電池內部各物種濃度分佈、電池性能與燃料使用率等變化,找出各參數對電池之影響,成為日後設計的參考依據。
研究結果顯示,在改變操作參數上,濃度增加對電池性能將有很大的提升,且對電池初始電壓降也較小;高體積流率有較大的最大電流密度,但燃料使用率會較小,可以根據模擬結果找出最適當的選擇。在幾何外型設計上,分別增加陰陽極厚度對電池性能都有提升,但陰極對電池性能影響將較為顯著;流道高寬比增加會導致電池內電阻增加,造成電池性能下降,根據模擬結果可以找出臨界值做參考依據;流道長度的改變將會影響平均電流密度的大小,流道長度越長可選用較高的體積流率,使電流密度分佈較為均勻;觸媒位置分佈於電池底部相對於側面有較佳的電池性能,隨著觸媒分佈增加也將有效地增加總電流值。 This research is to analyze the internal transmission in channel and the cell performance of membraneless hydrogen peroxide micro fuel cell in a Y-shaped microchannel by commercial software CFDRC. It solves governing equations through finite volume method. To get the effect of each parameter through each species concentration in the cell and the cell performance and the rate of utilizing fuel under each parameter. It could be the reference basis of the design in the future. Resulting from simulation, increasing the concentration improves the cell performance and the cell initial voltage drop could be less. High flow rate could get better current density, but the rate of utilizing fuel would be less. We can find out the most proper choice according to the result from simulation. Geometrically, increasing the thickness of the catalyst of anode or cathode could improve the cell performance, especially to cathode. Increasing the channel aspect ratio would increase the cell internal resistance to decrease the cell performance. It could be a reference basis by finding a critical value according to the result from simulation. To change the channel length would influence the average current density. Long length under high flow rate could make the distribution of the current density uniform. The catalyst distribute in the bottom could get better cell performance than in the side. It could increase the total current value effectively by increasing the catalyst. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/33895 |
全文授權: | 有償授權 |
顯示於系所單位: | 應用力學研究所 |
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