Abstract:
A mathematical model of a solid oxide fuel cell (SOFC) with a BaCe1-xSmxO3-α type electrolyte is developed. This class of electrolytes exhibits both proton and oxygen-ani...Show MoreMetadata
Abstract:
A mathematical model of a solid oxide fuel cell (SOFC) with a BaCe1-xSmxO3-α type electrolyte is developed. This class of electrolytes exhibits both proton and oxygen-anion conductivity. To develop the model, heat transfer, mass transfer and electrochemical processes are taken into account. The existence of steady-state multiplicity in this class of fuel cells is investigated under three operation modes: constant ohmic load, potentiostatic and galvanostatic. The cell has up to three steady states under the constant ohmic load and potentiostatic modes, and a unique steady state under the galvanostatic mode. This same steady state behavior has been observed in oxygen-anion conducting and proton conducting SOFCs. Interestingly, this study shows that in this class of SOFCs, thermal and concentration multiplicities can coexist; ignition in the solid temperature is accompanied by extinction in the fuel and oxygen concentrations, and ignition and extinction in concentrations of water in the anode and cathode sides, respectively.
Published in: 2012 American Control Conference (ACC)
Date of Conference: 27-29 June 2012
Date Added to IEEE Xplore: 01 October 2012
ISBN Information: