Thermal Performance Comparison of Pcm Based Latent Heat Storage Systems

The efficient storage and utilization of thermal energy are crucial for advancing sustainable energy systems. Latent Heat Energy Storage Systems (LHESS) leverage the high energy density associated with phase transitions of Phase Change Materials (PCMs), providing an effective solution for thermal energy management. This study focuses on the thermal performance analysis of two different LHESS configurations. Paraffin waxes were selected as a PCM due to their advantageous thermal characteristics, such as high latent heat of fusion, chemical stability, and non-corrosive nature. The research methodology encompasses Computational fluid dynamics LHESS (CFD). Detailed charging and discharging simulations during 30 hours are conducted to predict the thermal performance, efficiency, and operational characteristics of each design under various conditions. The investigation also encompasses a detailed examination of their melting and freezing behavior, thermal conductivity, specific heat and density. Results indicate that at the 30-hour mark, nearly all of the Phase Change Material (PCM) in LHESS 2 has transitioned to the liquid phase when the charging simulation is conducted, whereas approximately 20 percent of the PCM in LHESS 1 remains in the solid phase. During the discharging phase, LHESS 2 demonstrates a faster and more efficient phase transition process. This data suggests that LHESS 2 exhibits a more effective performance compared to LHESS 1. The results are expected to offer valuable insights for optimizing LHESS designs, enhancing their efficiency and sustainability, and guiding the selection of appropriate systems for various industrial and residential applications.