均勻流場受力優化矩形質子交換膜燃料電池

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姓名

翁莉芳(Li-Fang Weng) 查詢紙本館藏

畢業系所

機械工程學系

論文名稱

均勻流場受力優化矩形質子交換膜燃料電池
(Uniform flow field force Optimized rectangular Polymer electrolyte membrane fuel cell)

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至系統瀏覽論文 (2027-8-19以後開放)

摘要(中)

本研究於原實驗室設計之金屬多孔材流道上，設計矩形流道之質子交換膜燃料電池，進而增加燃料電池反應面積，可大幅減少同瓦數電堆/單電池之重量與體積，提升電堆重量及體積功率密度。本研究使用組裝平台並於電池組裝時中心施予一正向力，增加電池受力均勻性，改善電池流場狀況，進而提升電池性能，並利用介面壓力驗證電池內部受壓之均勻性，使用各項流場分析技術(如：壓力降、氣體利用率等)及表面結構分析，探討內部流阻對電池性能之影響，最後進行性能測試，驗證不同正向力下之電池性能。
研究結果顯示，當使用矩形流道，使反應面積提升至原方形設計的3倍，重量卻只有原方形設計的1.8倍，提升電池重量功率密度，且使用組裝平台並施予正向力之電池，電池內部中心受壓較均勻，使氣體擴散層及流道接觸更加均勻化。而在流道內部分析中，使用組裝平台並施予200 kgf之電池，於當量比測試中，空氣當量比由3降至2時，無使用組裝平台之電池，0.6 V下之電流密度下降幅度為26 %，使用組裝平台並施予200 kgf之電池，0.6 V下之電流密度下降幅度為10 %，且氣體利用率高達62.9 %。使用組裝平台並施予200 kgf之電池性能於0.6 V下之電流密度可高達1200 mA/cm2，證實此為一成功且實用之設計。

摘要(英)

In this research, the assembly platform was used for fuel cell assembly. Since the area of the fuel cell is rectangle, a normal force was applied to the center of the fuel cell to distribute the force uniformly, which was verified by checking the interface pressure. Flow field analysis techniques (such as pressure drop, gas utilization, etc.) and surface structure analysis were used to determine the effect of resistance to the cell performance. And performance testing was used to verify fuel cell performance under different forward forces. The results show that when using a rectangular flow channel and the reaction area was increased by three-fold. However the weight of cell only becomes 1.8 times that of the original square design. This greatly increases the weight power density of the fuel cell. The fuel cell which assembling with proper normal force can uniformly make the gas diffusion layer and the flow path in better contact with each other. In the flow field analysis, the assembly platform was used and a fuel cell of 200 kgf was applied. In the stoichiometry test, when the air stoichiometry was reduced from 3 to 2 and the assembly platform was not used, the current density at 0.6 V decreased 26%. However, fuel cell using an assembly platform and applying a 200 kgf normal force, the current density at 0.6 V only reduces 10%. Moreover the gas utilization is as high as 62.9%. The use of an assembly platform and a 200 kgf force achieves a fuel cell performance that reach up to 1200 mA/cm2 at 0.6 V, which confirms that the new design is successful and practical.

關鍵字(中)

★ 質子交換膜燃料電池
★ 金屬多孔材
★ 流場設計
★ 矩形流道

關鍵字(英)

論文目次

目錄
中文摘要 i
英文摘要 ii
致謝 iv
目錄 v
圖目錄 viii
表目錄 xi
第一章緒論 1
1-1前言 1
1-2質子交換膜燃料電池 5
1-2.1燃料電池之種類 5
1-2.2質子交換膜燃料電池工作原理 8
1-2.3質子交換膜燃料電池之組成結構 10
1-2.4質子交換膜燃料電池之極化現象 14
1-3電化學交流阻抗基本原理 16
1-4研究動機與方向 19
第二章文獻回顧 20
2-1質子交換膜燃料電池 20
2-2金屬多孔材之研究與應用 21
2-3組裝受力對電池之影響 22
2-4壓降分析 23
2-5電化學交流阻抗分析 24
第三章實驗方法與實驗設備 28
3-1實驗架構與流程 28
3-2界面壓力量測 29
3-3截面結構分析 30
3-3.1掃描式電子顯微鏡 30
3-4壓降量測 31
3-5燃料電池各部元件 32
3-5.1膜電極組 32
3-5.2矽橡膠氣密墊片 34
3-5.3鎳金屬多孔材 34
3-5.4金屬雙極板與流道 35
3-5.5端板 35
3-6燃料電池測試系統 36
3-7電化學交流阻抗分析儀 40
第四章結果與討論 44
4-1組裝平台設計理念 44
4-2組裝平台對電池性能之影響 46
4-3組裝平台對流場壓降之影響 56
4-4金屬多孔材特性分析 58
4-5組裝平台對電池氣體利用率之影響 59
4-6組裝平台前後化學當量比對電池的影響 61
第五章結論與未來規劃 65
5-1結論 65
5-2未來規劃 66
第六章參考文獻 67

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指導教授

曾重仁(Chung-Jen Tseng)

審核日期

2019-8-20

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