內鑲水冷流道雙極板之質子交換膜燃料電池

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賴鈺諴(Yu-Hsien Lai) 查詢紙本館藏

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機械工程學系

論文名稱

內鑲水冷流道雙極板之質子交換膜燃料電池
(Proton Exchange Membrane Fuel Cell with Water-Cooled Bipolar Plate)

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摘要(中)

質子交換膜燃料電池堆在運行時有控溫之問題，傳統水冷式散熱雖能有效散熱並維持電池性能，但卻需要額外的體積及重量。本研究開發內鑲式水冷流道燃料電池，將水冷流道鑲於燃料流道旁，整合水冷流道及燃料流道於雙極板中，省去傳統水冷板之加裝，藉以降低質子交換膜燃料電堆之體積、重量與生產成本；另外，為了解決因增大反應面積而造成之電池變形影響，本研究於水冷區安裝定位鎖緊區，此區之設置能有效降低電池變形量，並優化內部流場，進而提升電池性能。
研究結果顯示，於定位鎖緊區加裝螺絲，提供適當鎖緊力，能改善電池之變形情況，使其內部中心受壓較為均勻，讓氣體擴散層及流道接觸更加均勻。最終，單電池於操作電壓0.8 V下，有效提升性能48 %；另外，藉由化學計量比及背壓法測試之結果可得，此設計應用於電堆後，其流場與水密技術之開發並無太大問題，而在電壓均勻性與介面壓力均勻性亦具不錯之表現。而後若將此設計組裝成2 kW電堆，比起傳統水冷板設計，內鑲水冷燃料電池電堆可降低9 %之電堆體積以及節省12 %之加工成本。

摘要(英)

In this research, we discuss about controlled temperature proton exchange membrane fuel cell (PEMFC) stack with water cooling system. The separate water cooling plates at the ends and in between the traditional PEMFC stack increases its cost, volume and weight. A flow channel plate embedded with water cooling channel feature to improve the temperature control in PEMFC stack is developed in this study. The water cooling channel is inlaid next to the fuel flow channel in the fuel cell and the inlet and outlet of fuel and water for the PEMFC stack is integrated to its bipolar plates. Further, the idea of designing a rectangular PEMFC stack with in-situ cooling design could arise uneven locking of the fuel cell. The uniform locking in the rectangular PEMFC stack is achieved by introducing an additional locking feature design in flow field plates of the in-situ water cooling area in the PEMFC stack. The PEMFC stack bolt fixing positions in this design promotes uniform locking and pressure distribution in fuel cell assembly. Thus promotes the uniform contact between the gas diffusion layer and flow chancel in the PEMFC stack. The experimental results shows that an increase in performance of 48 % (0.8 V) is observed in a single cell with additional lock feature compared to normal locking PEMFC. The effects of various fuel stoichiometric ratio and back pressure on the performance of the cell is also investigated. The uniform and good flow field distribution is also observed in PEMFC stack with this proposed design. The firm uniform contact between the PEMFC stack components in this design favored in exhibiting outstanding performance. Assembling a 2 kW PEMFC stack with this proposed design could also reduce the volume of the stack by 9 %. This novel flow field design study helps in decreasing the cost, volume and weight of the PEMFC stack with higher performance.

關鍵字(中)

★ 質子交換膜燃料電池
★ 水冷流道
★ 內鑲設計
★ 流道設計

關鍵字(英)

論文目次

中文摘要 i
Abstract ii
誌謝 iv
目錄 v
圖目錄 viii
表目錄 xi
符號說明 xii
第一章緒論 1
1-1　　前言 1
1-2　　質子交換膜燃料電池 4
1-2-1　燃料電池種類 4
1-2-2　質子交換膜燃料電池工作原理 7
1-2-3　質子交換膜燃料電池之組成結構 9
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 18
第二章文獻回顧 20
2-1　　質子交換膜燃料電池 20
2-2　　金屬多孔材特性之研究與應用 21
2-3　　組裝受力對電池之影響 23
2-4　　壓降分析 24
2-5　　電化學交流阻抗分析 25
第三章實驗方法與設備 28
3-1　　實驗架構與流程 28
3-2　　介面壓力量測 29
3-3　　壓降量測 30
3-4　　燃料電池各部元件 31
3-4-1　膜電極組 32
3-4-2　矽膠氣密墊片 34
3-4-3　鎳金屬多孔材 34
3-4-4　金屬雙極板與流道 35
3-4-5　端版 35
3-5　　燃料電池測試系統 36
3-6　　電化學交流阻抗分析儀 40
第四章結果與討論 44
4-1　　內鑲水冷流道之分布與設計 44
4-2　　雙極板之水密技術之開發 47
4-3　　厚度分布與鎖緊區之應用 49
4-4　　電池介面壓力與組裝平台正向力之關係 53
4-5　　鎖緊區扭力對電池性能之影響 56
4-6　　鎖緊區扭力對流場壓降之影響 60
4-7　　電池內部流場分析 62
4-8　　內鑲水冷設計電池之背壓法測試 63
4-9　　內鑲水冷設計電池之化學計量比測試 67
4-10　　電堆之電壓、溫度與介面壓力均勻性測試結果 70
4-11　　內鑲式水冷流道與傳統水冷板之比較 74
第五章結論與未來規劃 76
5-1　　結論 76
5-2　　未來規劃 77
第六章參考文獻 78

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指導教授

曾重仁

審核日期

2020-8-19

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