平板式固態氧化物燃料電池之模擬研究

Abstract

近年來由於石油與汙染議題的大幅被重視，能源專家們都開始尋求"新能源"。燃料電池是尋求"新能源"的一項解決方案。最早可以追溯到1970年代，由於當時技術與時機尚未成熟，當時未受到很大的重視。最近十幾年來，新材料的研發與能源短缺、價格飆漲等因素，燃料電池也開始被眾人所重視。 市面上所能見到的料電池有數十種，如低溫型的質子交換膜燃料電池(PEMFC)、低溫型的磷酸燃料電池(PAFC)、中溫型的熔融碳酸鹽類燃料電池(MCFC)、中高溫型的固態氧化物燃料電池(SOFC)等。其中以質子交換膜燃料電池(PEMFC)與固態氧化物燃料電池(SOFC)最為常見。 本文嘗試以Ansys fluent之SOFC模組模擬軟體觀察燃料電池之整體與局部之現象，並藉由設計與分析適當之流道，以達到提高發電效率之目的。首先我們透過調查、量測與測試各種不同參數並得到比較真實的值並以此作為分析依據。我們接著以所得的參數進行實際模擬並與手邊的資料進行比對，最後再以所驗證的資料進行包含流道條件的單電池測試與分析。

In the recent years, the issue on fossil fuels and air contaminations had significantly impact on today`s energy source, so the experts on energy have to try to find some new energy sources, and fuel cell is one of the solutions. The origin of fuel cell can be traced back to 1970`s, but during those days, the technology and opportunity were premature, so the issue isn`t popular. But in today`s life new materials has been discovered and fossil fuels are being depleted, therefore the public has paid more attention on the issue of fuel cells. There are several types of fuel cells that are being studied, such as proton exchange membrane fuel cell (PEMFC), phosphoric acid fuel cell (PAFC), molten carbonate fuel cell (MCFC) and solid oxide fuel cell (SOFC). Of all the fuel cells , PEM and SOFC are relatively known. In this thesis, we attempt to use Ansys fluent and its SOFC module to to observe the overall and some partial physical phenomena of the cell, hoping by analyzing and designing a good channel, we can improve the efficiency of the cell. First of all, we try to survey, measure and try different material parameters to get a more realistic value as a benchmark of the thesis. Then we validate our works with the data we have, and make sure these are feasible. Lastly, we implement our flow design and analyze the results.