碳布壓縮量對仿生物結構流道之燃料電池的影響

The Effect of Compressed GDL on the Performance of Bio-Cell Flow Fuel Cells

黃雅惠(Ya-Hui Huang)

指導教授 ： 翁芳柏

元智大學/工程學院/機械工程學系/碩士(2006年)

https://doi.org/10.6838/YZU.2006.00094

摘要

本文主旨為研究探討碳布壓縮量對仿生物結構流道之燃料電池的影響，在實驗中為了使燃料電池分別在不同壓縮量時能得到最佳之性能以提升電池的反應效率，在實驗中分別設計碳布壓縮量為71.4％、42.9％、14.3％，其墊片厚度為0.1mm、0.2mm及0.3mm，用鐵弗龍墊片來控制氣體擴散層之壓縮度，墊片愈厚壓縮量愈大，其孔隙度愈小，則壓差愈大，使得基材部分更緻密，導電性更好。
分別在不同的燃料加濕溫度及電池溫度參數下進行燃料電池的操作，另外配合壓差計來測量燃料電池中空氣出入口，以補助分析燃料電池在這些操作參數下之改變情形，實驗結果發現碳布壓縮量為0.2mm時性能最好。

關鍵字

燃料電池 ； 壓縮量

並列摘要

The purpose of the study is to understand the effect of compresed GDL(Gas diffusion layer) on the performance of Bio-cell Fuel cell. In our experiments, we tested efficiency of fuel cell on several compression ratios of GDL, which are 71.4％, 42.9％ and 14.3％, with gasket thickness of 0.1mm, 0.2mm and 0.3mm to get optimal efficiency for fuel cell. Teflon gaskets are used to control compression ratios of gas diffusion layers. The compression ratios are direct proportional to thickness of gasket, and inverse proportional to porosity. Thicker gasket also leads to higher pressure difference and higher electrical conductivity.
The test of fuel cell is under various temperatures with pressure gauge to obtain parameters at airway of fuel cell. The purpose is to analyze the variation under different test parameters. The results of the study indicates that optimal efficiency of fuel cell will occurred at compression ratio when carbon layer is 0.2mm.

並列關鍵字

Fuel cells ； compressed ratio

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