The application of phase change material(PCM) in floor radiation heating system was studied.The composite granule PCM were prepared by sol-gel method and the PCM gypsum mortar was prepared by using the composite granule PCM.Based on the floor heating experiment platform,floor heating experiments was performed by using PCM mortar and common mortar separately to obtain the characteristic of charging and discharging latent heat energy of the containing PCM floor and to analyze the indoor temperature distributi...