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姓名 羅世坤(Shin-Kun Lo) 查詢紙本館藏 畢業系所 機械工程學系 論文名稱 流場設計對質子交換膜燃料電池性能之研究
(The Flow Field Design in the Polymer Electrolyte Membrane Fuel Cell)相關論文 檔案 [Endnote RIS 格式] [Bibtex 格式] [相關文章] [文章引用] [完整記錄] [館藏目錄] [檢視] [下載]
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摘要(中) 摘要
本研究採用Nafion 112為主體的膜電極組(MEA)進行單一燃料電池之實驗及分析,藉著不同的流道設計與操作條件,探討對於質子交換膜燃料電池的性能輸出影響。實驗條件包含不同的流道設計,改變電池溫度,改變增濕瓶加濕溫度,氧化劑之種類,與背壓壓力值的變化等。實驗之結果可以供未來組裝電池堆之參考依據。
由實驗結果可以發現,質子交換膜燃料電池在低溫環境下可以快速啟動並可迅速的達到穩定的輸出電壓。此外,在燃料電池的表面溫度為60℃與增濕瓶的加濕溫度為75℃時可以獲得最佳的輸出功率。一般而言,提昇電池溫度有助於電化學反應速度和離子在電解質膜內的傳遞速度,但是,過高的燃料電池溫度會造成膜電極組內發生乾膜(Dry out)的情況,使得燃料電池的性能下降。提昇增濕瓶加濕溫度則是可以增加膜電極組中的水含量。水含量越高,結合膜的內阻抗越低。但膜電極組內部的水含量過高時,將會發生氾濫(Flooding)的現象,阻礙氫氣、氧氣進入擴散層,降低燃料電池性能。
本研究中,在流道設計上使用四種不同的設計,分別為蛇行式(SFF),交差式(IFF),雙交差蛇行式(DISF),雙蛇行交差式(DSIF)。實驗中發現使用蛇行式流道可以獲得最好的燃料電池性能,其原因在於此流道設計可以讓氣體燃料在流道轉角處也會有部分的燃料強迫進入氣體擴散層,並且使用蛇行式流道設計,其流道內部的氣體使用面積為最大。摘要(英) Abstract
Effects of various flow field designs and operating conditions on the performance of proton exchange membrane fuel cells (PEMFC) are investigated. Nafion 112 membranes are used in the work. Operating conditions studied include humidification temperature, cell temperature, types of oxidizers, and back pressures.
In the investigation, four different flow field designs are studied. These include traditional serpentine flow field (SFF), interdigitated flow field (IFF), and inhouse designed double interdigitated serpentine flow (DISF) and double serpentine interdigitated flow field (DSIF). The experimental results show that the SFF has the best performance in the group. This is because the SFF has a large active surface area for the gas flow and also provides better water removing in cell. Especially in the high current density zone, unnecessary water will block the gas passage and thus reduce the cell performance.
Results also show that increasing the cell temperature increases the cell performance due to improved electrochemical reaction rate and ion conductivity in the electrolyte. However, if the cell temperature goes too high, the membrane may dry out, and the cell performance will decrease. Another important factor is humidification temperature. A suitable humidification temperature can reduce the resistance of the MEA.關鍵字(中) ★ 流場設計
★ 燃料電池關鍵字(英) ★ Flow field design
★ PEMFC論文目次 目錄
致謝………………………………………………………………………I
摘要……………………………………………………………………II
目錄……………………………………………………………………Ⅳ
圖表目錄…………………………………………………………VI
第一章 緒論………………………………………………………1
1.1 前言……………………………………………………………1
1.2燃料電池運作原理……………………………………2
1.3 燃料電池的種類………………………………………3
1.4 燃料電池的極化現象…………………………………………8
1.5 文獻回顧………………………………………………………9
1.6 研究目的……………………………………………………15
第二章 燃料電池優點與結構分析………………………………18
2.1 燃料電池的優點…………………………………………18
2.2質子交換膜燃料電池結構分析……………………………19
第三章 實驗儀器與實驗方法………………………………………24
3.1掃描式電子顯微鏡(SEM)……………………………………24
3.2 CNC碳板加工機…………………………………………26
3.3 燃料電池測試台…………………………………………26
第四章 結果與討論…………………………………………31
4.1改變燃料電池之表面溫度…………………………………31
4.2改變增濕瓶加濕溫度…………………………………33
4.3改變氫氣及氧化劑側之氣體壓力…………………………34
4.4氧化劑種類…………………………………………………36
4.5改變流道設計…………………………………………………36
第五章 結論與建議……………………………………………………38
5.1 結論………………..…………………………………………38
5.2 未來研究方向與建議…………………...……………………40
參考文獻………………………………..………………………………41
表目錄
表1.1主要燃料電池的特性比較表…………………………………45
表2.1流道設計參數表………………………………………………46
表4.1蛇行式流道設計(SFF)實驗表…………………………………47
表4.2 交岔式流道設計(IFF)實驗表…………………………………48
表4.3 雙交岔蛇行式流道設計(DISF)實驗表………………………49
表4.4 雙蛇行交岔式流道設計(DSIF)實驗表…….…………………50
表4.5 改變電池溫度對電池性能影響結果表………………………51
表4.6 改變增濕瓶溫度對電池性能影響結果表……………………55
表4.7 改變背壓壓力對電池性能影響結果表………………………58
圖目錄
圖 1.1.質子交換膜燃料電池的原理示意圖………………………61
圖1.2.燃料電池極化曲線圖…………………………………………62
圖1.3.蛇行式流道設計氣體擴散示意圖……………………………63
圖 1.4.交岔式流道設計氣體擴散示意圖……………………………64
圖 2.1.蛇行式流道設計(SFF)圖………………………………………65
圖 2.2 交岔式流道設計(IFF)圖………………………………………66
圖 2.3雙交岔蛇行式流道設計(DISF)圖……………………………67
圖 2.4雙蛇行交岔式流道設計(DSIF)圖……………………………68
圖 2.5.1多孔性氣體擴層表面結構SEM圖(放大倍率200)………69
圖2.5.2多孔性氣體擴層表面結構SEM圖(放大倍率500)………69
圖2.5.3多孔性氣體擴層表面結構SEM圖(放大倍率1000)………70
圖2.6燃料電池側視圖……………………………………………71
圖2.7燃料電池內部結構圖…………………………………………71
圖3.1 CNC碳板加工機………………………………………………72
圖3.2燃料電池測試系統儀器………………………………………73
圖3.3燃料電池測試系統儀器(續)……………………………………73
圖3.4燃料電池測試系統儀器(續)……………………………………74
圖3.5實驗裝置圖…………………………………………………75
圖4.1 蛇行式流道,氧化劑為氧氣,在不同電池表面溫度下,電池性能圖。…………………………………………………………76
圖4.2 蛇行式流道,氧化劑為空氣,在不同電池表面溫度下,電池性能圖。……………………………………………………………77
圖4.3 交岔式流道,氧化劑為氧氣,在不同電池表面溫度下,電池性能圖。……………………………………………………………78
圖4.4 交岔式流道,氧化劑為空氣,在不同電池表面溫度下,電池性能圖。……………………………………………………………79
圖4.5 雙交岔蛇行式流道,氧化劑為氧氣,在不同電池表面溫度下,電池性能圖。……………………………………………………80
圖4.6 雙交岔蛇行式流道,氧化劑為空氣,在不同電池表面溫度下,電池性能圖。……………………………………………………81
圖4.7雙蛇行交岔式流道,氧化劑為氧氣,在不同電池表面溫度下,電池性能圖。……………………………………………………82
圖4.8雙蛇行交岔式流道,氧化劑為空氣,在不同電池表面溫度下,電池性能圖。……………………………………………………83
圖4.9蛇行式流道,氧化劑為氧氣,在不同增濕瓶加濕溫度下,電池性能圖。…………………………………………………………84
圖4.10蛇行式流道,氧化劑為空氣,在不同增濕瓶加濕溫度下,電池性能圖。………………………………………………………85
圖4.11交岔式流道,氧化劑為氧氣,在不同增濕瓶加濕溫度下,電池性能圖。………………………………………………………86
圖4.12交岔式流道,氧化劑為空氣,在不同增濕瓶加濕溫度下,電池性能圖。………………………………………………………87
圖4.13雙交岔蛇行式流道,氧化劑為氧氣,在不同增濕瓶加濕溫度下,電池性能圖。………………………………………………88
圖4.14雙交岔蛇行式流道,氧化劑為空氣,在不同增濕瓶加濕溫度下,電池性能圖。………………………………………………89
圖4.15雙蛇行交岔式流道,氧化劑為氧氣,在不同增濕瓶加濕溫度下,電池性能圖。………………………………………………90
圖4.16雙蛇行交岔式流道,氧化劑為空氣,在不同增濕瓶加濕溫度下,電池性能圖。………………………………………………91
圖4.17蛇行式流道,氧化劑為氧氣,在不同背壓壓力值,電池性能圖。………………………………………………………………92
圖4.18蛇行式流道,氧化劑為空氣,在不同背壓壓力值,電池性能圖。………………………………………………………………93
圖4.19交岔式流道,氧化劑為氧氣,在不同背壓壓力值,電池性能圖。………………………………………………………………94
圖4.20交岔式流道,氧化劑為空氣,在不同背壓壓力值,電池性能圖。………………………………………………………………95
圖4.21雙交岔蛇行式流道,氧化劑為氧氣,在不同背壓壓力值,電池性能圖。………………………………………………………96
圖4.22雙交岔蛇行式流道,氧化劑為空氣,在不同背壓壓力值,電池性能圖。………………………………………………………97
圖4.23雙蛇行交岔式流道,氧化劑為氧氣,在不同背壓壓力值,電池性能圖。………………………………………………………98
圖4.24雙蛇行交岔式流道,氧化劑為空氣,在不同背壓壓力值,電池性能圖。………………………………………………………99
圖4.25蛇行式流道,在不同氧化劑下,電池性能圖。………………100
圖4.26交岔式流道,在不同氧化劑下,電池性能圖。………………101
圖4.27雙交岔蛇行式流道,在不同氧化劑下,電池性能圖。………102
圖4.28雙蛇行交岔式流道,在不同氧化劑下,電池性能圖。………103
圖4.29背壓壓力值為0 atm,氧化劑為氧氣,電池性能圖。…………104
圖4.30背壓壓力值為1 atm,氧化劑為氧氣,電池性能圖。…………105
圖4.31背壓壓力值為2 atm,氧化劑為氧氣,電池性能圖。…………106
圖4.32背壓壓力值為0 atm,氧化劑為空氣,電池性能圖。…………107
圖4.33背壓壓力值為1 atm,氧化劑為空氣,電池性能圖。…………108
圖4.34背壓壓力值為2 atm,氧化劑為空氣,電池性能圖。…………109參考文獻 1. Carrette, L., Friedrich, K. A. and Stimming, U., “Fuel cells –
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30、黃柏瑄,PEMFC電集集觸媒層之電熱流傳輸現象之探討, 91年7月。
34、熊思愷,實驗方法探討質子交換膜燃料電池在不同設計條件及製作方式下對性能影響之研究, 90年7月指導教授 曾重仁(Chung-Jen Tseng) 審核日期 2003-6-26 推文 facebook plurk twitter funp google live udn HD myshare reddit netvibes friend youpush delicious baidu 網路書籤 Google bookmarks del.icio.us hemidemi myshare