Steady-state multiplicity in a solid oxide fuel cell: Practical considerations

被引：13

作者：

Bavarian, Mona ^{[1
]}

Soroush, Masoud ^{[1
]}

机构：

[1] Drexel Univ, Dept Chem & Biol Engn, Philadelphia, PA 19104 USA

来源：

CHEMICAL ENGINEERING SCIENCE | 2012年 / 67卷 / 01期

关键词：

Solid oxide fuel cell; Steady-state multiplicity; Energy; Mathematical modeling; Stability; Nonlinear dynamics; MODEL; POLARIZATION; SENSITIVITY; IGNITION;

D O I：

10.1016/j.ces.2011.05.054

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Steady-state multiplicity in a solid oxide fuel cell (SOFC) in three modes of operation, constant ohmic external load, potentiostatic and galvanostatic, is studied using a detailed first-principles lumped model. The SOFC model is derived by accounting for heat and mass transfer as well as electrochemical processes taking place inside the fuel cell. Conditions under which the fuel cell exhibits steady state multiplicity are determined. The effects of operating conditions such as convection heat transfer coefficient and inlet fuel and air temperatures and velocities on the steady state multiplicity regions are studied. Depending on the operating conditions, the cell exhibits one or three steady states. For example, it has three steady states: (a) at low external load resistance values in constant ohmic external load operation and (b) at low cell voltage in potentiostatic operation. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：2 / 14

页数：13

共 23 条

[1]

[Anonymous], 2009, Fundamentals of Momentum, Heat, and Mass Transfer, Revised

[2] The dynamic response of PEM fuel cells to changes in load [J].