Multi-physical field coupling and modeling for induction heating of porous sodium chloride

Sodium chloride in molten state is an excellent medium material for energy storage due to its low viscosity, good flow performance and excellent chemical stability. Among various heating methods, induction heating technology has the advantages of high tracing temperature, high heating efficiency, and low difficulty of adjustment. However, it is often difficult to visually display the state of the heated material and can only rely on numerical calculations for prediction. In order to deal with the risks of solidification, freezing and blocking of molten salt in the energy storage equipment, and solve the problems of real-time monitoring of molten salt status and efficiency of electric energy utilization, a multi-physical field coupling model of electromagnetic induction heating for porous medium is established to clarify the influence of coil current parameters and molten pool geometry on flow state and energy conduction under the superposition of electromagnetic field, thermal field and flow field of molten salt. It can provide theoretical basis and practical guidance for the application of induction heating technology for molten sodium chloride in temperature tracking, anti freezing, and improving energy storage efficiency.