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題名 | 燃料電池陽極流道表面結構效應之數值模擬=The Numerical Simulation for Surface Structure Effect in the Anode Channel of PEMFC |
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作者 | 劉昭忠; 程冠儒; 黃啟郎; | 書刊名 | 工程應用技術學刊 |
卷期 | 1:1 2012.02[民101.02] |
頁次 | 頁41-52 |
分類號 | 468.1 |
關鍵詞 | 質子交換膜燃料電池; 陽極; 表面結構; PEMFC; Anode channel; Surface structure; |
語文 | 中文(Chinese) |
中文摘要 | 主要探討質子交換膜燃料電池(PEMFC,Proton Exchange Membrane Fuel Cell)的燃料氣體(氫氣)在陽極流道內的傳輸行為。氫氣在陽極從流道輸入氣體,經由擴散層和觸媒層解離成氫離子和電子,其中電子往集電板移動,氫離子經質子交換膜往陰極移動。因此,燃料氣體在陽極的傳輸方式會受流道結構之影響。為了準確模擬燃料氣體在陽極流道之傳輸特性,在數值方法上以結構性多區塊、交錯網格系統進行空間離散,並採用有限體積法來依序疊代求解連續、動量等守恆方程式,而流場中速度與壓力間的藕合以PISO演算法計算之。從計算結果得知,凸塊高度增加,凸塊區間的迴流效應愈加明顯,且Cf值變大,代表電流密度也隨之增加。當凸塊高度固定為0.5,凸塊寬度增為1.5倍時,發現凸塊區間的迴流區大小與未增加凸塊寬度的差異不大,且兩者的Cf值變化很小,凸塊寬度幾乎不會影響電流密度。 |
英文摘要 | The main purpose of this study is to calculate the transport phenomena of fuel gas in the anode channel of proton exchange membrane fuel cells (PEMFC). In this code, the structured single-block and staggered grid system are adopted for discretization of the space domain, while the finite volume method is applied to solve iteratively the governing equations of mass and momentum. The coupling among the velocities and pressure is handled by PISO methods. The transport characteristics of flow field in the anodic Channel are presented with the variant parameter. Furthermore, it is investigated the relation between the electric current density and surface structure effect in anode channel. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。