Finite element modelling and optimization of Ge/SiGe superlattice based thermoelectric generators

Abstract The study presents the development of a 3D Finite Element modelling (FEM) technique for uni-coupled Ge/SiGe superlattice-based module configuration. methodological approach involved geometrical design – based Thermoelectric generator (TEG), defining thermoelectric material properties and boundary conditions then implementation governing equations to obtain an approximate solution via meshing TEG module. developed FEM was used optimize geometry with aim reducing contact resistance improved performances. One way achieve this is reduce thickness silicon substrate. Thus by substrate, thermal losses in system will be minimized. Secondly, increasing superlattice heights, output voltage also increased given anisotropic nature superlattice, it inferred that optimal measurements can obtained at surface which yields maximum leg height. relevance allows simulation different real-world would otherwise expensive time-consuming investigate experimentally. It gives insight temperature distribution under varying operating conditions.