Stability analysis of solid oxide fuel cell systems

Conference Article


Iberian Symposium on Hydrogen, Fuel Cells and Advanced Batteries (HYCELTEC)



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Solid oxide fuel cells (SOFC), with entirely solid structure and high operating temperatures, have attracted research interest in recent years. Unlike other types of fuel cells, low electrode corrosion and low electrolyte looses are assumed due to its solid structure. Furthermore, the high operating temperatures enable SOFC to reach up to 50% to 65% efficiency with excellent impurity tolerance. However, there are several degradation mechanisms in SOFC, such as electrode delamination, electrolyte cracking, electrode poisoning, etc. Most of these degradations are related with the operation conditions, which can be optimized by appropriate control. Since most control algorithms are developed based on the mathematical models, it is important to obtain SOFC control-oriented models. Therefore, this paper aims to develop a SOFC control-oriented model, including the dynamics of inlet manifold, SOFC stack and outlet manifold. Moreover, equilibrium points are characterized and a stability around these equilibrium points analysis is performed. This information can provide guidelines for control strategies design.


control system analysis computing.

Author keywords

control-oriented model, solid oxide fuel cell, stability analysis

Scientific reference

Y. Xing, R. Costa and J. Na. Stability analysis of solid oxide fuel cell systems, 7th Iberian Symposium on Hydrogen, Fuel Cells and Advanced Batteries, 2019, Barcelona, Spain.