Real-Time Imaging of Liquid Water in an Operating Proton Exchange Membrane Fuel Cell
Real-Time Imaging of Liquid Water in an Operating Proton Exchange Membrane Fuel Cell
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DOI：
10.1149/1.2184893
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发表时间：
2005-11
影响因子：
3.9
通讯作者：
M. Hickner;N. Siegel;Ken Chen;Dominic N McBrayer;D. Hussey;D. Jacobson;Muhammad Arif
中科院分区：
文献类型：
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作者：
M. Hickner;N. Siegel;Ken Chen;Dominic N McBrayer;D. Hussey;D. Jacobson;Muhammad Arif
利用中子成像技术测量了质子交换膜燃料电池（PEMFC）在不同电流密度和温度条件下的含水量。结果表明，质子交换膜燃料电池的含水量与电池的电流密度和温度有很强的耦合关系。这些测量结果表明，无论电流密度增加还是降低，水含量的变化滞后电流密度的变化至少100 s。当在80°C下操作时比在40°C下操作时在电池中测量到更少的液态水。在60°C电池温度下，在650 mA/cm 2附近观察到水含量的峰值，并且发现水含量随着电流密度的增加而降低。这是解释在电池加热的上下文中，通过执行一个简单的热分析的操作PEMFC，以便产生定量信息的废热及其对液体水包含在电池。
Neutron imaging experiments were carried out to measure the water content of an operating proton exchange membrane fuel cell (PEMFC) under varying conditions of current density and temperature. It was found that the water content of the PEMFC is strongly coupled to the current density and temperature of the cell. These measurements indicate that changes in water content lag changes in current density by at least 100 s, both when the current density was increased and decreased. Less liquid water was measured in the cells when operating at 80°C than at 40°C. At 60°C cell temperature, a peak in water content was observed around 650 mA/cm 2 and the water content was found to decrease with increasing current density. This is explained in the context of cell heating by performing a simple thermal analysis of an operating PEMFC so as to yield quantitative information on the waste heat and its effects on the liquid water contained in the cell.