▎ 摘　　要

NOVELTY - Phosphogypsum-based composite phase change energy storage material which is prepared by encapsulating the phase change energy storage material with heat conductive porous phosphogypsum material, where the heat conductive porous phosphogypsum material is a porous phosphogypsum material modified by a heat conductive filler and the density is 0.2-0.8 g/cm3. USE - Used as phosphogypsum-based composite phase change energy storage material. ADVANTAGE - The energy storage material has high encapsulation capacity, high thermal conductivity, encapsulation amount of 83% and has the thermal conductivity of 0.505W/(m.K). The method is simple, easy, economical; has large-scale production and has important practical significance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing phosphogypsum-based composite phase change energy storage material comprising preparing heat conducting filler dispersion including adding the heat conductive filler into water for ultrasonic auxiliary dispersion to obtain heat conductive filler dispersion, preparing heat conductive porous phosphogypsum material including continuously introducing air disturbance fluid in the phosphogypsum fluid, namely micro-disturbance auxiliary, combining with vacuum drying method to prepare heat conducting filler modified phosphogypsum, obtaining the heat - conductive porous phosphogypsum material and encapsulating phase change energy storage material including soaking the heat conductive porous phosphogypsum material in a phase change energy storage material that is in a liquid state after heating, combining vacuum immersion and capillary effect and encapsulating the phase change energy storage material in a heat conductive porous phosphogypsum material to obtain a phosphogypsum-based composite phase change energy storage material.