  This paper presents a study on the design optimization of Thermal Energy
Storage (TES) using a cylindrical cavity and Gallium as a Phase Change Material
(PCM). The objective is to improve the time span of charging and discharging,
as well as minimize heat loss during storage. Five different models with
varying geometries and heat source configurations were designed and analyzed
using CFD simulation in ANSYS Fluent. The results indicate that models with
fins on the heat source surface outperform those without fins, due to increased
heat transfer surface area. Comparing the models, Model 4 with three heat
sources performs similarly to Model 2 with four heat sources, suggesting an
optimal design. However, Model 5 demonstrates less desirable results as the
charging time of the PCM increases. Overall, this study highlights the
effectiveness of the optimized design in Model 4 with three heat sources for
efficient Thermal Energy Storage.
