相变储能混凝土制备方法及其储能行为研究

用"兩步法",即首先制作相變儲能骨料,再采用相變儲能骨料,用普通混凝土的制備技術配制了相變儲能混凝土.實驗結果表明,采用該方法可以在混凝土中儲存足夠的液體相變材料,配制的相變儲能混凝土的儲能功能與商業相變材料相當,可以滿足實際應用的要求;多孔材料孔結構的幾何特征對液體相變材料在多孔材料中的吸收和儲存有較明顯的影響,具有較高孔隙率、孔結構內部連通性較好和在邊界區域具有輸運通道的多孔材料能夠吸收和儲存較多的液體相變材料.相變材料在多孔材料中的體積分數對其相變行為也有顯著的影響. Phasechanging energystoring concrete was prepared by means of a socalled twostep method. At the first step, phasechanging energystoring aggregates were fabricated, then at the second step, normal method for preparing concrete and the phasechanging energystoring aggregates were used. Test results show that adequate amount of liquid phasechanging material can be stored in concrete to render concrete energystoring capability similar to that of commercially available product. Test results also show that the geometrical feature of the pore structure of porous materials has significant influence on their absorption ability of liquid phasechanging material. In addition, the volume fraction of phasechanging material in concrete has remarkable effect on the phasechanging behavior of concrete.