Study of Water Production Behaviour by the Visualization of PEFC (Plug Flow Generation Mechanism in Dual Serpentine Channel)
Study of Water Production Behaviour by the Visualization of PEFC (Plug Flow Generation Mechanism in Dual Serpentine Channel)
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通过 PEFC（双蛇形通道中的塞流生成机制）的可视化研究产水行为
DOI：
10.1299/kikaib.72.745
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Go Nakamura
中科院分区：
文献类型：
--
作者：
Toshiaki Konomi;Go Nakamura
通过对双蛇形通道PEFC的可视化研究，观察了PEFC的输出电压稳定性和阴极气体通道中的产物水行为。结果表明，输出电压降从活塞流开始时开始，在活塞流结束时达到最小值，电压降与活塞流轨迹长度成正比。通过副极板和气体扩散层之间的间隙泄漏到另一个通道减少了活塞流，这表明到另一个通道的小旁路通道使得活塞流小。从加湿器到阴极气体入口的管道中的过量饱和水使得两个通道中同时发生塞流。为避免在限压下紧急停车，应采取保温和设置疏水器等措施，使阴极空气入口处的饱和水和冷凝水较少。
Output voltage stability and product water behaviour in cathode gas channel are observed by the visualization of PEFC with dual serpentine gas channel. Result show that output voltage drop starts at the beginning of plug flow and reaches minimum value at the end of it. Drop voltage is in proportion to plug flow locus length. The plug flow is diminished by leakage to the other channel through clearances between by-polar plate and gas diffusion layer, this indicates small bypass channel to the other channel makes plug flow small. Excess saturated water in the piping from humidifier to cathode gas inlet makes plug flow simultaneously in both channels. To avoid emergency stop under limited voltage, it is important to keep less saturated and condensed water at cathode air inlet by heat insulation and by setting water trap.