600W金屬發泡材燃料電池組研發;Research and Development of a 600 W Metal Foam Pem Fuel Cell Stack

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題名:	600W金屬發泡材燃料電池組研發;Research and Development of a 600 W Metal Foam Pem Fuel Cell Stack
作者:	曾重仁
貢獻者:	能源工程研究所
關鍵詞:	雙極板;金屬發泡材燃料電池;電池堆;研究領域：能源工程
日期:	2011-08-01
上傳時間:	2012-01-17 17:48:02 (UTC+8)
出版者:	行政院國家科學委員會
摘要:	燃料電池之技術已逐漸成熟，但成本與重量仍有相當大的改進空間。由於傳統石墨雙極板之體積與重量佔電池堆之60 %以上，而成本佔約30 %，故電池堆輕量化之標的多為雙極板。在石墨板上建立氣體流道的過程十分昂貴與耗時，導致雙極板的成本太高。於此，本實驗室在2006 年提出一同時兼顧價廉與容易製造暨組裝的替代方案。利用金屬發泡材重量輕與高導電之特性，在提升性能之同時，達到輕量化與降低成本之目的。本實驗室在 2006~2009 年間，針對金屬發泡材燃料電池進行一系列研究，並且成功的研發出一低成本而容易製造、組裝的150 W 電池堆。此一電池堆之重量與體積皆較相同瓦數下的石墨板燃料電池輕與小。雖然在前期計畫中已成功開發出150 W 金屬發泡材燃料電池堆，但當陰極使用空氣時效能較不佳。考量實際應用時陰極多使用空氣，故極有必要改進此一問題。國際上對金屬發泡材燃料電池的探討不多，故提出此一 2 年期計畫。第一年將以前期計畫所開發的金屬發泡材內部的流場模擬技術為基礎，結合外部的進排氣模擬分析技術，開發完整電池堆之流道分析技術。並針對前期之單進單出之設計，提出改進對策，探討多進多出或區塊化設計之效果。第二年將根據第一年分析設計之結果，製作一個600 W 之電堆，並將單電池之反應面積由 5cm × 5cm 提升至 10cm × 10cm。實驗部分並將探討操作條件對性能之影響及長時間測試。 In 2009, we have successfully developed a 150 W stack using metal foams instead of traditional graphite flow fields. The cost is low, yet it's easy to fabricate and assemble. The stack is light and compact. Good performance can be obtained when using oxygen as the oxidant. However, the performance degrades when using air as the oxidant. Preliminary investigation into this problem reveals that the reactant distribution is not as good as it can be. Because we were focused on the feasibility of using metal foams in previous years, we did not pay attention to the flow distribution. In practical applications, air, instead of oxygen is used. Therefore, we are proposing a two-year project to look into this problem and build a 600 W stack using air. The main focus of the first year of this two year proposal is to set up a 3-D model to simulate the transport phenomena of a metal foam fuel cell and to investigate the effects of important parameters, such as pore size, permeability, and thickness, on the water transport and fuel cell performance. The CFD software, Fluent, will be used in this study. Special physical models will be incorporated using user defined subroutines. In the second year, results obtained from the single cell study will be used to build a 600 W fuel cell stack. The fuel and oxidant distribution among the various single cells will be studied. The goal is to build a working 600 W fuel cell stack using 10 cm × 10 cm MEAs. Effects of cooling system design, that is, natural convection and forced convection, on the stack performance will also be investigated. 研究期間：10008 ~ 10107
關聯:	財團法人國家實驗研究院科技政策研究與資訊中心
顯示於類別:	[能源工程研究所 ] 研究計畫

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