Two-phase Flow in Fuel Cells in Short-term Microgravity Condition

IMECH-IR > 力学所知识产出(1956-2008)

	Two-phase Flow in Fuel Cells in Short-term Microgravity Condition
	Guo H; Zhao JF(赵建福); Ye F; Wu F; Lv CP; Ma CF
会议录名称	Microgravity Science And Technology
	2008
页码	265-269
会议名称	3rd International Topical Team Workshop on Two-phase Systems for Ground and Space Applications
会议日期	SEP 10-12, 2008
会议地点	Univ Libre Bruxelles, Brussels, BELGIUM
摘要	A visual observation of liquid-gas two-phase flow in anode channels of a direct methanol proton exchange membrane fuel cells in microgravity has been carried out in a drop tower. The anode flow bed consisted of 2 manifolds and 11 parallel straight channels. The length, width and depth of single channel with rectangular cross section was 48.0 mm, 2.5 mm and 2.0 mm, respectively. The experimental results indicated that the size of bubbles in microgravity condition is bigger than that in normal gravity. The longer the time, the bigger the bubbles. The velocity of bubbles rising is slower than that in normal gravity because buoyancy lift is very weak in microgravity. The flow pattern in anode channels could change from bubbly flow in normal gravity to slug flow in microgravity. The gas slugs blocked supply of reactants from channels to anode catalyst layer through gas diffusion layer. When the weakened mass transfer causes concentration polarization, the output performance of fuel cells declines.
关键词	Fuel Cells Two-phase Flow Microgravity Aerospace Applications Closed Environment Gas Evolution Performance System Visualization Channels Behavior Cathode Field
WOS记录号	WOS:000260252200022
收录类别	CPCI-S
语种	英语
引用统计	被引频次：18[WOS] [WOS记录] [WOS相关记录]
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/25382
专题	力学所知识产出(1956-2008)
通讯作者	Guo H
推荐引用方式 GB/T 7714	Guo H,Zhao JF,Ye F,et al. Two-phase Flow in Fuel Cells in Short-term Microgravity Condition[C]Microgravity Science And Technology,2008:265-269.

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