Phase change materials (PCMs) show significant potential for latent thermal energy storage when integrated with renewable energy sources like wind and solar, as well as thermal management systems. Nevertheless, the inherent low thermal conductivity of PCM materials and the continuous migration of the melting front during phase change present challenges to the system’s power and effective energy density. This thesis explores the numerical modeling of pressure-enhanced close contact melting (CCM) as an innovative method to enhance the thermal performance of PCM, particularly paraffin, in two-dimensional rectangular containers. The numerical investigation utilizes the finite element method in the COMSOL commercial software. The study aims to examine key performance indicators of thermal management and latent heat thermal energy storage systems employing PCM.