博碩士論文 91323063 詳細資訊


姓名 顏正和(Cheng-Ho Yen)  查詢紙本館藏   畢業系所 機械工程學系
論文名稱 平板式固態氧化物燃料電池雙極板之流道設計與流場觀測
(Flow Visualization and Channel Design of Bipolar Plates for a Planar Solid Oxide Fuel Cell)
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摘要(中) 固態氧化物燃料電池是一個乾淨的能源轉換裝置,其不需經由燃燒過程,便可將燃料的化學能直接轉換成電能。雙極板是固態氧化燃料物電池的重要元件之一,其主要功能是使燃料氣體與空氣能均勻分佈進入活動反應區,來增加燃料的利用率。本研究使用染劑來針對一平板式SOFC雙極版之流道,以導流板設計佐以流場觀測,實驗量測分析雙極板流道流場之均勻度和速度分佈,並探討不同雙極板之流道流場分佈情形,以及雙極板在加入導流板後,導流板對於流道流場分佈有何影響。實驗結果顯示,雙極板兩進氣口中間凸出的部分距流道入口的長度,對於流體在雙極板流道內的分佈影響不大。反觀,實際影響流體在雙極板流道內的分佈,主要是受進氣口扇形區域的幅度大小與流道出口處距離排氣口的距離等影響。而藉由使用導流板,可使流道流場能均勻滲透通過電極,以增加電池的整體效能。
摘要(英) Solid oxide fuel cell (SOFC) is a clean energy conversion device. It converts the chemical energy of a fuel directly into the electric energy without combustion. The bipolar plate is a key component of SOFCs. The major function of the bipolar plate is to distribute uniformly the gaseous fuel and air over the active areas and thus increases the efficiency of fuel usage. This thesis simulates experimentally the flow behaviors in the channels of the bipolar plate of a planar SOFC using flow dye visualization. Focuses are on the uniformity of the flow in the channels, measurements of the mean velocity distributions, and effects of flow Reynolds number. The results show that the influence of the distance from the inlet of channels to the middle prominent part between the two inlets of the bipolar plate is insignificant for the flow uniformity in the channels. Two important factors that influence the flow distribution of the channels in the bipolar plate are formed to be the range of fan-shaped area near the inlet and the distance from the outlet of the channels to the final outlet. Moreover, using the guide vanes in the bipolar plate can make the flow distribution of the channels much more uniformly over the electrodes and thus could increase the whole efficiency of fuel cells.
關鍵字(中) ★ 流道設計
★ 平板式
★ 雙極板
★ 固態氧化物燃料電池
★ 燃料電池
★ 流場觀測
關鍵字(英) ★ planar
★ bipolar plate
★ SOFC
★ flow visualization
★ channel design
★ solid oxide fuel cell
★ fuel cell
論文目次 中文摘要 i
英文摘要 ii
致謝 iii
目錄 iv
圖目錄 vi
表目錄 x
第一章 前言 1
1.1 動機 1
1.2 SOFC之運作原理 2
1.3 電池元件和結構 4
1.4 問題所在 7
1.5 解決提案 8
1.6 論文概要 9
第二章 文獻回顧 14
2.1 SOFC之發展歷史 14
2.2 SOFC之數值模擬分析 15
2.3 雙極板設計分析 18
第三章 實驗方法與步驟 21
3.1 流場觀測設備 21
3.2 雙極板設計與製作 22
3.2.1 雙極板設計 22
3.2.2 雙極板製作 24
3.3 實驗操作方法 25
3.4 影像處理方法 27
3.5 流率測量 27
3.6 實驗誤差分析 29
3.6.1 流率量測誤差分析 30
3.6.2 實驗操作誤差分析 31
第四章 結果與討論 49
4.1 不同雙極板之流道流場分佈情形 49
4.2 不同入口幾何形狀之影響 53
4.3 加入導流板之流場改善情形 54
第五章 結論與未來工作 86
5.1 結論 86
5.2 未來工作 87
參考文獻 88
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黃鎮江,燃料電池,初版,全華科技圖書股份有限公司,台北市(2003)。
指導教授 施聖洋(Shenqyang (Steven) Shy) 審核日期 2004-9-21
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