Experimental and Simulation Study on Heat Accumulation Phenomenon at the Bottom of Solid Thermal Storage Electric Boilers

This paper addresses the issue of heat accumulation and low heat release efficiency at the bottom of solid thermal storage electric boilers through experimental and simulation studies.A test platform was designed for conducting three sets of comparative experiments.A numerical simulation model was established and solved, and the scientific accuracy of the research was verified through a comparison of experimental data and simulation results.The study shows that as the thermal storage and release processes progress, the temperature of the thermal insulation structure at the bottom of the storage body gradually increases, with significant heat accumulation.Under the experimental scale, the accumulated heat reaches 5.25e 5 kJ.Improving ventilation conditions does not enhance the heat utilization of this part.Calculations indicate that the thermal energy in the insulation brick layer is approximately ten times greater than that of other brick layers, playing a dominant role.With three cycles of thermal storage and release, the accumulated heat is substantial, offering considerable potential for improvement.