Numerical Analysis of the Utilization of Magnesium Chloride Hexahydrate As A Heat Storage Medium in an Adiabatic Environment

Abstract Poland’s transition to renewable energy sources (RES) and thus the electrification of the energy sector presents an issue with regards to grid capacity. This problem could be a potential cause of power outages in the future. Such infrastructure failures pose a threat to national energy security. One of the solutions to this problem is the accumulation of energy in a different form. Thermal energy storage (TES) systems accumulate energy in the form of heat. They can be connected to the power grid or RES as well as existing heating infrastructure. This way, they can provide much needed alleviation of the energy grid without incurring significant costs related to the building of new infrastructure. TES systems based on latent heat storage can accumulate a significant amount of energy in a small volume relative to other methods. This makes them a viable solution in urban areas. The viability of magnesium chloride hexahydrate (MgCl 2 ·6H 2 O), which is a medium-temperature phase-change material (PCM), for such a solution, was analysed herein.