Amelia Post

Thermoelectric power generation for continuous glucose monitoring

Started Apr. 30, 2024

Abstract or project description

Thermoelectric generators (TEGs) utilize a phenomenon known as the Seebek effect, which converts temperature difference (ΔT) into usable energy. More recently, wearable TEGs (WTEGs) have been used to harvest human body heat, powering wearable electronics. TEGs have many energy-saving applications, and could create an energy, material, and cost saving solution for diabetics monitoring their glucose. This paper explores the viability of such a concept by analyzing and evaluating various TEG materials and creating a CAD prototype with a calculated power output and dimensions. The optimal semiconductor materials were determined to be n-type sulfur doped silver selenide (S-Doped Ag2Se) and p-type antimony doped bismuth telluride (An-Doped Bi2Te3). Additional materials for the generator's thermal interface layer, filler substrate, and heatsink were also identified. These materials were boron nitride silicone, silica aerogel, and copper foam respectively. With user experience and product feasibility in mind, the final 3x5x0.6425cm design is compact and produces an estimated 79.6μW at room temperature; enough wattage to power a 64μW commercial continuous glucose monitor (CGM). As the number of diabetic patients increases, so does the demand for cost and energy efficient options for glucose monitoring. This design provides a more cost effective and environmentally friendly solution.