A Three-Dimensional Numerical Model to Predict the Performance of a Microcombustion-Based Thermoelectric Generator

The current study presents a three-dimensional numerical model of a combustion-based thermoelectric power generator. The novelty of the proposed work lies in the development of a numerical model to simulate the thermoelectric effect, integrated with combustion, in a CFD environment. The integrated system comprises of a stepped microcombustor, a recirculating cup, and two Bi2Te3 modules. The microcombustor is optimized to give a high thermal output through two backward-facing steps and exhaust gas recirculation, which enhances the flame stability. Further, the integration of the thermoelectric module into the CFD environment and the thermal characteristics and the thermoelectric performance of the system are analyzed. A maximum open-circuit voltage of 7.2 V and a peak power rating of 4.35 W are reported, with a maximum conversion efficiency of 5.39%. The successful integration of the thermoelectric model paves the way for further research in the field of thermoelectric power generation.