Study On The Performance Of Thermal Insulating Wall Materials With Multi-element PCM

China is an energy consuming country, at the same time, supply and demanding are tense. Building energy consumption accounted for a larger proportion of China’s total energy consumption. Development and application of energy-saving in building have become a hot spot in construction materials. Phase change material is one of the effective measures in green building. Phase change energy storage material can absorb or release heat to achieve the effect of temperature control. The phase change material is incorporated traditional insulation materials and prepared new energy efficient building wall material,with considerable research value, while also generating significant economic and environmental benefits.This selection of high-quality porous carrier material perlite(EP) and the phase change material lauric acid(LA), paraffin by simple physical melting melt compounding method to resolve compatibility issues with PCM insulation materials and wall materials.Phase change temperature principle, prepared stereotypes composite phase change material(SSPCM), and prepared two stereotypes of composite phase change material to do a series of experiments to study its properties, grasp the phase-change thermal wall evolution of temperature performance materials, illustrates the phase-change thermal insulation wall materials, structural properties of its mechanism, providing new ways and means of phase change materials in building Energy Saving.The results of the two PCMs could be drawn as following:Experimentally determining by the amount of immersion time shelter phase change material is set to 1h, suitable impregnation temperature is 70 ℃. From the water absorption test shows two phase change material in the process of expansion of the pearl complex,expanded perlite will have a positive impact absorption, which can effectively reduce the water absorption of the base material, lauric acid- expanded perlite composite water absorption capacity of the phase change material reduces the matrix material is lower than paraffin- expanded perlite composite phase change material.From the durability test results show that the two composite phase change material properties are relatively stable,while paraffin- perlite composite phase change material than lauric acid- expanded perlite composite phase change material durability, from step cold curve seen in both basic no supercooling phenomenon. While the DSC curve tested two composite phase change wall material phase change temperature and latent heat, its recommendations into practice range.Added the two composite phase change material into the wall and gave performance testing. By volume expansion experiment shows with increasing content of the phase change material, the volume expansion coefficient of the two walls are gradually increased.Test results show that the temperature control capability composite phase change material to add more storage capacity, the thermostat, the better, and lauric acid phase composite phase change latent heat storage material is greater than paraffin composite phase change material. Combining mechanics experiment shows phase change wall material and strength of cement specimens decreases with increasing content of the composite phase change, and therefore should be added in the wall material suitable lauric acid- expanded perlite composite phase change energy storage materials and paraffin- expanded perlite composite phase change material.