Numerical Investigation of Fin Geometry Effects on Thermal Performance in a Thermosyphon-Integrated Thermoelectric Generator System

In this study, the thermal performance of thermosyphon systems with a thermoelectric generator (TEG) integrated is optimized to achieve efficient waste heat conversion. The purpose of the research is to describe the system's thermal efficiency at various fin heights and spacing. The goal is to numerically examine how these parameters affect system performance. The results showed that as fin spacing rises from 10 mm to 25 mm, the number of fins decreases from 19 to 7. Also, the numerical study found that by increasing the spacing between the fins from 10 mm to 25 mm, while the fin height kept a constant at 50 mm, a significant 153% increase in the heat transfer coefficient while the fin's temperature rose by 20.8%. Fin height also showed a significant impact on thermal performance. At a fixed fin spacing of 10 mm, increasing the fin height from 10 mm to 50 mm produces a 193.2% reduction in the heat transfer coefficient while the temperature of the heat sink decreased by 33%. The fin spacing of 10 mm with a height of 50 mm was found to be the optimal configuration with a minimum fin temperature of 36.66 °C. The most effective configuration has a fin spacing of 10 mm and a fin height of 50 mm. This optimized design achieved a peak voltage output of 455 mV, demonstrating its ability to efficiently harvest energy in TEG systems.