空孔径分布の異なる微細多孔体層を隣接させたハイブリッド構造ガス拡散層 : X線ラジオグラフィーによる液水挙動可視化解析と酸素拡散特性(熱工学,内燃機関,動力など)

概要

論文の詳細を見る
Mass transfer characteristics of gas diffusion layer (GDL) are closely related to cell performance in polymer electrolyte fuel cell (PEFC). The new type structure GDL (hybrid type GDL), in which two kinds of porous media with different pore size distribution were arranged adjacently, was evaluated as a specimen. Time-series images of liquid water distribution in GDLs were taken by transfer imaging using X-ray radiography. The method for deriving liquid water saturation from images has also been developed and utilized for clarifying liquid water behavior in GDLs and its mechanisms. Oxygen diffusivity characteristics of GDLs have been evaluated in parallel. It is mainly confirmed that the transfer imaging method by X-ray radiography is effective for analyzing liquid water behavior in GDLs and the pore size distribution is one of the factor that influences liquid water behavior in GDLs. The findings is can be used to increase the understanding of the relationship between liquid water distribution and oxygen diffusivity.
2010-10-25