Research on the Performance of Surrounding Structures for Residential Buildings with Near Zero Energy Consumption
Studying the mechanical and thermal insulation properties of the enclosure structure of nearly zero energy residential buildings is beneficial for providing theoretical basis for the dosage of phase change materials in on-site construction.A phase change concrete mortar was prepared using stearic acid and lauric acid as phase change materials,and the performance changes of different phase change concrete enclosure structures were studied.The results indicate that as the replacement ratio of phase change composite system increases,the density,slump,compressive strength,tensile strength,peak temperature at the center and side of the phase change concrete enclosure structure all decrease.When the replacement ratio of the phase change composite system is 30%,the phase change concrete enclosure structure meets the strength grade requirement of C45.Compared with ordinary concrete,the peak temperature at the center of the phase change concrete enclosure wall decreases by 9.7%,and the peak temperature at the side decreases by 12.4%.When the replacement ratio of the phase change composite system is 50%,the phase change concrete enclosure structure meets the strength grade requirements of C30.Compared with ordinary concrete,the peak temperature at the center of the phase change concrete enclosure wall decreases by 16%,and the peak temperature at the side decreases by 23.5%.
Near zero energy consumptionArchitectureSurrounding structureHeat exchange performance
NETL
NSTL
万方数据
