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研究生:陳威志
研究生(外文):Wei-chih Chen
論文名稱:不同流道寬度對微型直接甲醇燃料電池性能影響
論文名稱(外文):Effect of Different Flow-Fields on μDMFC Performance
指導教授:謝曉星
指導教授(外文):Shou-Shing Hsieh
學位類別:碩士
校院名稱:國立中山大學
系所名稱:機械與機電工程學系研究所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2009
畢業學年度:97
語文別:中文
論文頁數:128
中文關鍵詞:壓力降電池性能微型直接甲醇燃料電池可視化
外文關鍵詞:cell performancepressure dropvisualizationμDMFC
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  • 被引用被引用:3
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本實驗是以微精密加工製程,製作適用於微型直接甲醇燃料電池的流道板,並利用氣相薄膜沉積製程技術提升流道板的導電性與抗腐蝕性,以蛇形狀流道做為流道的主要幾何結構,藉由壓克力做為兩側端板以達到可視化的方式,觀測陽極流道中CO2氣泡的變化。在實驗操作中以陽極的甲醇濃度,操作溫度與甲醇流量作為主要參數,探討這三項參數對於燃料電池的極化曲線與功率密度的影響,並將實驗結果以VI曲線與PI曲線表示。同時利用可視化的方式,觀測陽極CO2的變化對於壓力降影響的情形,探討燃料電池在操作過程中,內部的物理現象。在實驗結果當中,當增加電流密度時,陽極流道中CO2產生率提升,而導致造成壓力降下降。最後,藉由實驗結果可以得到微型直接甲醇燃料電池的最佳流道尺寸( 700 μm)。
In this study, cell performance tests and measurements of the pressure drop in the anode flow channels of a micro methanol fuel cell (μDMFC) were conducted. The effect of different operating parameters on μDMFC performance was experimentally investigated for serpentine flow-field configuration. Experiments were conducted through a serious experiments with different operating conditions of temperature (40、60、70、80oC)、methanol concentration (0.5、1、1.5、2 M)、channel width (0.5、0.6、0.7、0.8、1、1.5、2 mm) and flow rate (10-20 sccm). Experimental results are presented in the form of polarization VI curves and PI curves under above operating conditions. The experimental results show that the pressure drop decrease with increasing current density. It has also shown that the pressure drop always increased with the methanol solution flow rates. The relationship between pressure drop and CO2 bubbles production rate would change with the current density increase. Finally, an optimal channel size of 700 μm for the present μDMFC could be obtained.
目 錄 i
表 目 錄 iii
圖 目 錄 iv
符 號 說 明 vi
中文摘要 viii
Abstract ix
第一章 序論 1
1-1 前言 1
1-2 燃料電池發展之歷史與簡介 3
1-3 燃料電池發電原理 4
1-4 燃料電池種類 5
1-5 研究目的 8
1-6 文獻回顧 9
第二章 實驗系統與設備 19
2-1 直接甲醇燃料電池組成元件 19
2-2 直接甲醇燃料電池電化學反應 23
2-3 燃料電池設計要點 26
2-4 微型直接甲醇燃料電池組元件設計與製造 28
2-5 微型直接甲醇燃料電池組裝 31
第三章 實驗相關設備與元件材料 37
3-1 實驗設備 37
3-2 實驗元件材料 40
第四章 燃料電池性能分析 48
4-1 前言 48
4-2 電極熱力學 48
4-3 極化現象 55
4-4 甲醇橫滲 58
第五章 誤差分析 62
第六章 結果與討論 65
6-1 甲醇濃度對於燃料電池性能的影響 66
6-2 操作溫度對於燃料電池性能的影響 67
6-3 開孔率對於燃料電池性能的影響 68
6-4 陽極流量對於燃料電池性能的影響 69
6-5 燃料電池性能對於陽極壓力降的影響 70
6-6 燃料電池擺設的影響 72
6-7 淨功率 75
第七章 結論與建議 103
7-1 結論 103
7-2 建議 105
參考文獻 106
附錄 A 114
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