DMFC两相流及其对传质影响的研究  

TWO-PHASE FLOW AND ITS INFLUENCE ON MASS TRANSFER IN DMFC

作　　者：郭航[1] 贾杰林[1] 汪茂海[1] 刘璿[1] 马重芳[1] 

机构地区：[1]北京工业大学环境与能源工程学院传热强化与过程节能教育部重点实验室,北京100022

出　　处：《工程热物理学报》2007年第1期101-103,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50406010;No.50236010)

摘　　要：采用自制的实验系统对液态进料直接甲醇燃料电池(DMFC)阳极交叉指状流道内的两相流动特性进行了可视化实验研究。自制的DMFC单电池带有透明窗口,采用镀金的不锈钢阴极极板和透明的聚碳酸脂阳极流场板,电解质为Nafion117膜。实验过程中燃料电池的进口总管和出口总管是水平的,进口流道和出口流道是竖直的。实验发现,出口流道中典型的两相流流型是泡状流、而出口总管中的典型流型是弹状流。进口流道中的气弹和气柱导致了阳极传质恶化。Visualization study of two-phase flow in anode interdigital flow bed of a liquid-fed direct methanol fuel cell （DMFC） was performed in a home-made experimental system. A self-made DMFC consisted of a Nation 117 membrane electrode assembly, a gold-plated stainless steel cathode polar plate and a polycarbonate anode flow field plate, which forms a transparent window for observation. The inlet and outlet manifold were horizontal in all experiments. Meanwhile, the inlet and outlet flow channels were vertical. The experimental results indicated that the typical flow pattern in outlet channels was bubbly flow and in outlet manifold was slug flow. Gas slugs and gas columns in the inlet channels lead to block of mass transfer in the anode.

关 键 词：直接甲醇燃料电池 传质 两相流 可视化 

分 类 号：TM911.4[电气工程—电力电子与电力传动]