脂肪酸/废加气块定形相变储能集料制备及性能

Preparation and properties of shape-stabilized phase change aggregate from fatty acid and waste autoclaved aerated concrete

以癸酸-硬脂酸(CA-SA)二元共熔脂肪酸作为相变储能材料,废加气混凝土块为载体,矿渣-水玻璃-石膏复合胶凝剂为封装材料,制备了密封性能良好的相变储能集料,解决了现有产品与建筑主体材料相容性差和使用寿命较低的缺点。通过DSC、FTIR、SEM等测试技术对相变材料及相变储能集料进行表征。结果表明:适宜的癸酸、硬脂酸的质量比为9∶1,其相变温度为26.8℃,相变潜热为96.4J/g;以多孔的废加气块为载体,相变材料吸附率可达60%;采用矿渣-水玻璃-石膏复合封装材料,制成的相变储能集料具有良好的密封性,稳定性能优异。相变集料应用模拟实验结果显示,其储能控温性能良好。

To solve the poor compatibility with main building materials and low service life of current commercial products, the phase change energy storage aggregate with good sealing performance was prepared using capric acid （CA） and stearic acid （SA） eutectic mixture as the phase change energy storage material, waste autoclaved aerated concrete as skeleton and slag-water glass-gypsum as the encapsulation material. CA-SA and the prepared phase change energy storage aggregate with it were characterized by DSC, FTIR and SEM. The results show that with an appropriate mass ratio of CA to SA is 9 ： 1, CA-SA has a melting temperature of 26.8℃ and phase change latent heat of 96.4J/g. With porous waste autoclaved aerated concrete as carder, the adsorption rate of phase change material is up to 60%. The prepared phase change energy storage aggregate possesses good sealing performance and excellent stability using slag-water glass-gypsum as encapsulation material. The simulation test shows that good temperature control and energy storage performances are achieved with this phase change energy storage aggregate.