Simulation study on influence of local heating methods on heatstorage and release performance of phase change floors

A simulation study and analysis are conducted on the heat storage and release performance of ordinary floors and phase change floors using different heat source heating methods, and the simulation results are compared with experimental data to verify their accuracy. The study establishes four box geometric models, including ordinary wood floors, ordinary marble floors, phase change wood floors and phase change marble floors, using Fluent simulation software, and designs six heating methods. By analysing the cavity temperature, floor surface temperature, phase change material (PCM) temperature, liquid fraction, and heat storage capacity of the simulated boxes, it is found that the use of local heating methods will prolong the heating time of the floor and cause local overheating on the floor surface. However, adding PCMs, using marble with high thermal conductivity, and reasonably adjusting the layout of the heat source area can alleviate this problem to a certain extent. In addition, the influence of local heating methods on the phase change degree of PCMs is the main reason for the changes in the temperature and heat storage capacity of phase change floors.