Assessment of the thermal energy storage on open-cell foam as a hierarchical thermal accumulator in a lumped-particle packed bed system: Charging and discharging

Abstract

Energy safety and climate change are challenges toward a sustainable futurity. The demand of global energy is growing, and depend on the fossil fuels. The Thermal Energy Storage (TES) systems have a potential importance regarding the energy consumption rate of the world. The thermal performance of the Molten Salt (MS) on open-cell foam includes TES can be splitted into three areas, such as sensible heat materials (solid and water), latent heat (Phase Change Materials (PCMs)) and thermochemical (endothermic chemical reversible reactions). The energy storage concept can be used to investigate heat transfer characteristics between the MS particles and fluid phase based on continuous solid phase model. These heat transfer characteristics are focused on the TES inside the MS particles and in fluid phase. The mathematical modelling developed based on two phase model, i.e., in  modelled a governing equation for the MS particles (solids) that behave as a continuous medium and governing equation for the fluid phase. The governing equations of the two-phase model are coupled through solid-fluid heat transfer flow. Works developed to assess the results of the charging and discharging profiles as well as the charging time and discharging of the thermal storage on the lumped-particle packed bed. In addition, the use of some physical parameters as the effective thermal conductivity and fluid-solid heat transfer coefficient have been used to check the impact on the charging and discharging about thermal storage. A discussion of the results from the current work will be made with the results of other authors.

DOI:https://doi.org/10.56238/sevenIVmulti2023-047