Structural Analysis of Solid Oxide Fuel Cell under Externally Applied Compressive Pressure

Solid Oxide Fuel Cells is considered as the power source having potential to satiate electrical as well as thermal energy demands for domestic and commercial applications. Assembly of the SOFC structure is subjected to a wide range of pressures on the surface, resulting in normal force on the plates. The application of pressure causes deformation of composite sealant which exhibits plastic behavior at high operating temperature. The present study shows the effect of externally applied pressures on the contact pressure between cell components. The natures of stresses in the flow channels, gaskets and both electrodes have also been evaluated. This holds importance as a measure of safety for the electrodes. It is noted that significant stress generation occurs near to the edge where the channel makes contact with the electrode. The study highlights a safe pressure range (0.05 – 0.1 MPa) for operation of the SOFC under consideration.