<p>Heat exchangers are critical components in thermal energy storage (TES) and conservation systems, where efficient thermal management is essential for maximizing energy utilization. This paper presents a focused investigation into the performance optimization of heat exchangers used in thermal energy storage systems, drawing on both experimental analysis and literature review. Our findings highlight the thermal behavior of shell-and-tube and plate heat exchangers under variable flow conditions and storage mediums, revealing that geometric modifications such as extended surfaces and turbulators can significantly enhance heat transfer rates by up to 18% without compromising pressure drop constraints. This study examined the use of phase change materials (PCMs) and observed that embedding metal foam structures within phase change materials improves thermal conductivity by over 30%, accelerating the charging/discharging cycles in thermal energy storage. Material degradation analysis under cyclic thermal loads showed stainless steel alloys outperformed traditional copper in maintaining structural integrity. The study underscores the importance of combining experimental validation with simulation techniques to evaluate novel configurations. Moreover, the integration of machine learning models enabled predictive insights into exchanger performance under dynamic operating conditions. These findings provide actionable design recommendations to improve heat exchanger durability and efficiency in sustainable energy systems. Future research should expand on smart sensor integration and real-time adaptive control strategies to further elevate system responsiveness and reliability.</p>