(Dr. David McDowell, advisor)
"Thermal Stress Analysis of LCA-based Solid Oxide Fuel Cells"
This research characterizes the thermal stress resulting from temperature gradients
in hybrid solid oxide fuel cells that are processed using a novel oxide powder
slurry technology developed at Georgia Tech. The hybrid solid oxide fuel cell
is composed of metallic interconnect and ceramic electrolyte constituents with
integral mechanical bonds formed during high temperature processing steps. A
combined thermomechanical analysis approach must be implemented to evaluate
a range designs for power output and structural integrity. As an alternative
to costly CFD analysis, approximate finite difference techniques that are more
useful in preliminary design are developed to analyze the temperature distributions
resulting from a range of fuel cell geometries and materials. The corresponding
thermal stresses are then calculated from the temperature fields using ABAQUS.
This model analyzes the manufacturing, start-up, and steady state operating
conditions of the hybrid solid oxide fuel cell.