搅拌釜式反应器Polymer电解质膜燃料电池
The Stirred Tank Reactor Polymer Electrolyte Membrane Fuel Cell
摘要：
描述了一种微分聚合物电解质膜（PEM）燃料电池的设计和运行。燃料电池的设计是基于耦合的搅拌槽反应器（STR）;在每个反应器隔室的气相充分混合。选择反应物流动、气相扩散和反应的特征时间，使得阳极和阴极处的气体组成均匀。STR PEM燃料电池是一维的;仅有的空间梯度横向于膜。采用STR PEM燃料电池研究了燃料电池的启动过程，以及其对负载、温度和反应物流速变化的动态响应。多个时间尺度的系统响应被发现对应于水的吸收膜，水通过膜和应力相关的机械变化的膜的运输。
英文摘要：
The design and operation of a differential Polymer Electrolyte Membrane (PEM) fuel cell is described. The fuel cell design is based on coupled Stirred Tank Reactors (STR); the gas phase in each reactor compartment was well mixed. The characteristic times for reactant flow, gas phase diffusion and reaction were chosen so that the gas compositions at both the anode and cathode are uniform. The STR PEM fuel cell is one-dimensional; the only spatial gradients are transverse to the membrane. The STR PEM fuel cell was employed to examine fuel cell start- up, and its dynamic responses to changes in load, temperature and reactant flow rates. Multiple time scales in systems response are found to correspond to water absorption by the membrane, water transport through the membrane and stress-related mechanical changes of the membrane.
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