研究生: |
陳柏宏 Po-Hung Chen |
---|---|
論文名稱: |
被動式微型直接甲醇燃料電池陰極排水裝置設計製造與測試 Development of the Passive Water Removal Device in Micro DMFC Cathode |
指導教授: |
曾繁根
Fan-Gang Tseng |
口試委員: | |
學位類別: |
碩士 Master |
系所名稱: |
原子科學院 - 工程與系統科學系 Department of Engineering and System Science |
論文出版年: | 2008 |
畢業學年度: | 96 |
語文別: | 中文 |
論文頁數: | 66 |
中文關鍵詞: | 燃料電池 、角落流 、毛細力 、表面張力 、直接甲醇燃料電池 、被動式 |
外文關鍵詞: | fuel cell, corner flow, capillary, surface tension, DMFC, passive |
相關次數: | 點閱:2 下載:0 |
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由於石油逐漸短缺使得替代能源受到矚目,而燃料電池的低汙染特色使得它成為一項熱門的研究,其中直接甲醇燃料電池藉著低溫操作與直接使用甲醇為燃料等特色使它較受到重視。目前燃料電池遭遇到的眾多問題中有其中一個是陰極反應產生的水會積存在反應區,使得空氣難以進入反應,造成燃料電池效率的降低。本論文中,成功地利用負光阻SU-8 2035經由黃光微影製程製作了一個具有排水流道與空氣進入孔交錯的結構,然後再利用表面處理使得水從流道移除而不阻塞空氣進入孔,並且移除的方式是利用毛細力驅動流體而不耗費能量,在排水流道的測試結果中,移除水的能力可達3.42μls-1cm-2。此外當產水量較大,超過流到所能移除的量時,在有吸水材料的輔助之下,最終依然能將水從流道中移除。也觀測了蒸氣在流道上凝結的情形,發現當足夠的蒸氣凝結液體佈滿了流道時,會聚集起來並且朝著流道的方向移動帶走。
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