The numerical simulation of radiant floor cooling and heating system with double phase change energy storage and the thermal performance

Being dependent statistics, building energy consumption has accounted for 2/5 of the world's total energy consumption. The combination of phase change energy storage materials with floor radiant cooling and heating system has become one of the main technical means of energy-saving buildings. Based on double phase change energy storage capillary floor radiant heating system, considering the effect of natural convection, wide phase transition area and latent heat release, combining with the characteristics of phase change materials phase behavior change, a novel three phase zone heat transfer model was established, and the Finite Volume method was used to solve the numerical problem. Then the heat storage and heat release of phase change energy storage floor under different working conditions in winter and summer were simulated to decide the phase-change heat transfer characteristics, the best water supply temperature, and the change rule of the surface temperature of the floor were analyzed. The research results can provide theoretical support for to draw up intermittent cooling and heating schemes.