開發潔淨的替代能源已是全世界的發展趨勢，而本實驗室目前也與工研院共同發展燃料電池相關的應用技術，希望未來能夠應用於燃料電池車。工研院在燃料電池的研究上，主要著重於燃料電池內的流道設計及流道板製程，其主要目的在於透過不同的流道製程，降低流道板的製作成本，並利用不同的流道設計，提升工作氣體流率，進而增進燃料電池整體的使用效率。
本論文的研究目標是開發低流阻的流道設計。在作法上，我們主要以ANSYS Fluent軟體來模擬流道流場。同時，我們也利用電路類比法發展了一套快速且較不複雜的流量估算方式；此外，我們也根據低流阻的目標，設計多款不同於傳統蛇行構造且具有低流阻的新流道:分別有支流類型、環繞式蛇行類型、左右對稱類型及波浪類型的流道。
我們也透過實驗的方式進行流道流量的驗證及發電效能的檢測。於實驗與模擬的流量結果比較中，傳統蛇行流道在進出口壓損7000 Pa ~ 2000 Pa下，模擬結果的最大誤差約為10%。在發電實驗中，我們只檢驗支流類型及環繞式蛇行類型的流道，結果顯示對稱支流型流道有最佳的性能表現。因此我們預期對稱支流型流道將是所有測試流道中，在串聯40顆電池的情況下，最能同時維持陰極端高當量比及高發電功率的流道。
最後我們則將以上的設計經驗，應用至大面積流道板的陰極端之流道設計中，此大面積流道板的反應面積約有600 ，而本論文是以多進多出及模組化的方式來設計流道，計算分析結果顯示，當使用六進六出搭配波浪流道時，可以在壓損5000 Pa下，供給約104 slm的空氣流量。此一結果滿足工研院預設之規格需求，因此可望在未來實際應用在工研院開發之燃料電池系統上。

In collaboration with the Industrial Technology Research Institute (ITRI), we are devoted to developing fuel cell technology, which can be utilized on board of automobiles, and hopefully will become increasingly more important in the future. In particular, in this thesis we shall focus on the flow channels, and propose several novel flow channel designs with low flow resistance, so as to help reduce the cost of manufacturing and system operation. Technically, here we simulate the flow field of such flow channel designs by use of the commercial software ANSYS Fluent. Moreover, we also construct a fast and rather accurate tool, namely the method of “circuit analogy”, to estimate the volumetric flow rate in such flow channels. The novel flow channels studied in this thesis include the “branch type”, “turn-around serpentine type”, “symmetry type” and “wavy type” flow channels. It is found that these flow channels can all produce higher volumetric flow rate than the traditional serpentine flow channel does. In addition, based on the results obtained from the above-mentioned flow channels, a large-area flow channel pattern, having an area of about , also is proposed. Specifically, in that design, we deploy multiple inlets and multiple outlets, and divide the large-area flow channel into several modules, each of which can accommodate a different subpattern. And the subpatterns can be properly combined to produce an “optimized” overall flow resistance. For example, when we use a six-inlet-six-outlet wavy channel design, it can produce a volumetric flow rate of 104 slm at a pressure drop of 5000 Pa, which is an outstanding performance compared with other existing designs.

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