This study investigates the performance characteristics and thermodynamic limitations of a TEC1-12706 thermoelectric cooler (Peltier module) through experimental analysis. The research validates the governing equations of thermoelectricity, specifically exploring the relationship between electrical power input and the achieved temperature gradient (∆T). By utilizing a controlled "thermal stack" assembly, the study evaluates the performance of the module under varying current levels and assesses the critical impact of thermal management on overall cooling efficiency. The findings demonstrate that while the Peltier effect provides a reliable, solid-state solution for localized cooling, the system is fundamentally constrained by the quadratic increase in Joule heating and the efficiency of heat rejection at the hot junction. The experimental results align with theoretical predictions, identifying an optimal operating current that maximizes the coefficient of performance (CoP) before the onset of thermal saturation.

KEYWORDS: Peltier Effect, Seebeck Effect, Figure of Merit (ZT), Joule Heating, TEC1-12706 Bismuth Telluride, Phonon-Glass Electron-Crystal (PGEC), Thermal Gradient, Thermal Back-Conduction, Coefficient of Performance (CoP), Thermal Saturation, Thermal Interface Material (TIM), Thermal Stack, Doping.