Study On Floor Module And Phase Change Materials With The Function Of Heat Storage And Sustained Heat Release Based On Solar Energy Utilization

To achieve efficient use of energy, The developed a kind of module floor with thermal storage and heat-release function. For this module floor, hot air converted from solar energy is heat source, and phase change material is thermal storage carrier. Following the principles of standardization and normalization processing, this module floor could achieve a balanced indoor heating. The structures and thermal and mechanic characteristics of this floor were investigated, and its heat storage, heat release characteristics were discussed, so as to provide a theoretical basis for the actual production. The research mainly includes:1、Development of phase change materialsIncluding the type and characteristics of phase change materials, selection of phase change material, development of new phase-change materials, phase transition temperature of the new developed-phase-change material, potential heat and other characteristics, development of composite phase change materials:(1) The phase change material (XB-1) and phase change materials (XB-2) were mixed according to a certain mass ratio before the phase transition temperature was detected.(2) Based on the mixture of XB-1and XB-2, A certain amount of additive (TJ-1) were applied, increasing the enthalpy value of phase change material and improving its thermal conductivity.(3) Phase-change material was filled in a selected porous material to gain a composite phase-change material. The best processing parameters for complexing were determined by test methods such as infer.(4) A best sealant material was found by sealing the composite phase change material with different material.(5) for Thermal analysis, electron microscopy characterization and surface area and porosity analysis were carried out on the composite phase change materials, and the correlation coefficient was determined.2、The structural design of floor module (1) Materials for the floor module were choosen, the module size, the maching process, and installation process were studied. At the same time, thermal characteristics of the heat storage floor module were calculated and analyzed.(2) Floor insulation was made. Three-layer plywood were used as the up and down cover, wood strips were around the edge, and the inner space was filled with thermal insulation material. Different thermal insulation materials were tested on a conductivity tester, and the best was choosen according to insulation effects.Results showed that:thermal conductivity and heat content of composite phase change materials which has a mass ration of XB-1/XB-2/TJ=(100/50/100) reached the requirements. At the same time, when expanded perlite was used as the carrier, cement was utilized for shaping and edging, problems of phase change material the solid liquid phase change process issues were successfully solved, for instance, leakage no longer occurred easily. At the same time composite floor sample module were to designed and manufactured. When extruded insulation board was used as the insulation floor, least heat was lost, and the heat source temperature is about60-70℃, the floor module could absorb most heat. Effects of structure, insulation materials, water temperature, and phase change materials on the heat storage and heat release performance of this floor were learned.Results showed that:this composite floor has good hear storage and heat release properties; its application is feasibile, whilt its processing and installation are relatively simple. Meanwhile, the experiment also suggested a limited endothermic capacity and a low hear transfer rate of this composite floor.