Nonlinear analysis of current instabilities in high temperature fuel cells

被引：18
|
作者：
Mangold, A
Krasnyk, A
Sundmacher, K
机构：
[1] Max Planck Inst Dynam Komplexer Tech Syst, D-39106 Magdeburg, Germany
[2] Otto Von Guericke Univ, Lehrstuhl Systemverfahrenstech, D-39106 Magdeburg, Germany
来源：
CHEMICAL ENGINEERING SCIENCE | 2004年 / 59卷 / 22-23期
关键词：
fuel cells; MCFC; SOFC; electrochemistry; nonlinear dynamics; mathematical modelling; numerical analysis;
D O I：
10.1016/j.ces.2004.07.094
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The conductivity of electrolytes in high temperature fuel cells increases with increasing temperature. It is shown that this property may lead to instabilities, inhomogeneous temperature fields, and hot spots. A simple spatially one-dimensional model of a cell is studied by phase plane analysis and numerical bifurcation analysis. The operation of the cell at constant voltage and at constant current is considered. It is found that in both cases spatial temperature patterns and channels of high current density can form. (C) 2004 Elsevier Ltd. All rights reserved.
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页码：4869 / 4877
页数：9
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