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研究生:朱冠名
研究生(外文):Kuan-ming Chu
論文名稱:不同流道板開孔率對微型燃料電池性能及暫態溫度分佈的影響
論文名稱(外文):Effects of Open Ratio of Flow Field Plates on a Micro PEM Fuel Cell Performance and Its Transient Thermal Behavior
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:2008
畢業學年度:97
語文別:中文
論文頁數:119
中文關鍵詞:微機電製程開孔率微型燃料電池
外文關鍵詞:MEMSMicro PEM fuel cellOpen ratio
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本實驗係使用微機電製程技術(黃光微影製程及微電鑄製程),製作出五組不同開孔率(Open ratio)之銅金屬流道板,以固定流道寬度(300μm)改變肋條(Rib)寬度(150~600μm),使開孔率大小變化為60.0%至37.9%,將探討陽/陰極壓力降變化、不同電池操作溫度與不同氣體進氣背壓對燃料電池性能的影響,經由實驗找出最佳化之流道板設計及電池操作參數。此外針對電池穩定性作長時間開路電壓量測,以及利用非接觸式紅外線感測器來進行燃料電池表面溫度量測,並進ㄧ步利用簡單的數學模型進行溫度趨勢預測。研究發現在不考慮系統的輸入功時,在開孔率為49.2%時有較好性能,反之,則開孔率為38.7%時有最大淨功輸出,且銅金屬流道板能穩定的在長時間操作下至少5小時並持續兩個月,在流道板材料的選擇上,銅將是ㄧ種重要的材料。
In this study, copper metals were used to fabricate five different flow field plates with various open ratios using MEMS technology. Five samples were prepared for experiments with rib width varying as 150, 200, 300, 450, and 600 μm at a fixed channel width (300 μm). The open ratio of flow field plates was varied from 60.0% to 37.9%. Experiments with different operating parameters of anode/cathode pressure drop, cell operating temperature, and gas backpressure were conducted. Furthermore, a simple lumped capacitance model was used to predict the temperature evolution of the fuel cell system. Then, the optimum flow field design and cell operating parameters were finally found. Based on the aforementioned experiments an optimal open ratio ofunity was found like 49.2%. Further, an optimal open ratio in terms of the net power gain factor (= power gain/power consumption) of 38.7% can be obtained for the cases under study. Durability and reliability for copper bipolar plate were examined for long range tests (each run with at least 5 hours duration for consecutive two months). This strongly suggests that copper sheets can be considered as one of possible candidates for flow field material.
目錄
頁次
目錄.....................................................……........................................................i
表目錄…………………………………………………………………...……iv
圖目錄………………………………………………………………………....v
符號說明…………………………………………………………….…..…. viii
中文摘要………………………………………………………………...…….x
英文摘要………………………………………………………………..…….xi

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……………………………………………………….….….10

第二章 實驗相關設備與元件材料…………………………………………16
2-1 實驗設備……………………………………………………….….….16
2-2 實驗元件材料………………………………………………….….….20
第三章 微型質子交換膜燃料電池元件設計與製作………………………30
3-1 質子交換膜燃料電池組成元件……………………………………...30
3-2 燃料電池組設計要點………………………………………………..35
3-3 微型質子交換膜燃料電池元件設計與製作………………………...36
3-3-1 使用製程原理簡介……………………………………………..37
3-3-2 燃料電池金屬流道板製程參數………………………………39
3-4 微型燃料電池組裝…………………………………………………...43

第四章 燃料電池之性能……………………………………………………55
4-1 前言…………………………………………………………………..55
4-2 電極熱力學…………………………………………………………..55
4-2-1 自由能與理想電位……………………………………………...56
4-2-2 理想電位與溫度之關係………………………………………...57
4-2-3 理想電位與壓力之關係………………………………………...59
4-3 極化現象……………………………………………………………..61
4-4 極化曲線……………………………………………………………..62

第五章 誤差分析……………………………………………………….…...66

第六章 結果與討論………………………………………………………….70
6-1五組單電池性能及耐久性比較………………………………………70
6-2 氣體進氣背壓對燃料電池性能的影響……………………………..71
6-2-1 相同且遞增的陽/陰極進氣背壓………………………………..71
6-2-2 不同的陽/陰極進氣背壓………………………………………..72
6-3 電池操作溫度對燃料電池性能的影響……………………………..72
6-4 電池操作參數及流道幾何尺寸對壓力降的影響…………………..73
6-4-1 氣體進氣背壓對壓力降的影響………………………………...73
6-4-2 電池操作溫度對壓力降的影響………………………………...74
6-4-3 流道幾何尺寸對壓力降的影響………………………………...74
6-5 流道板開孔率對壓力降及摩擦因子的影響………………………..75
6-6 五組單電池表面溫度的變化………………………………………..76
6-7 五組單電池功率比較………………………………………………..78

第七章 結論與未來展望……………………………………………………93
7-1 結論…………………………………………………………………..93
7-2 建議事項及未來展望………………………………………………..94

參考文獻……………………………………………………………………96

附錄A………………………………………………………………………102
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