A polymeric phase change composite material (70 wt% polyethylene glycol, PEG, 6000)-epoxy resin (29 wt%) with aluminum nanopowder (1 wt%) as filler, P60-E, was developed and thermally tested first in a spherical macro capsule in order to be used in thermal energy storage (TES) systems in constructions with low energy consumption. Since the thermal behavior of the phase change component, PEG 6000, is highly influenced by its crystallization behavior, structural and thermal data were correlated. Consequently a high crystallinity degree of 82.6%, found by X-ray diffraction (XRD), for the PEG 6000 component is analogous with values obtained from integrated Raman spectra and DSC data (latent heat of −113.6 J/g) collected at a cooling rate of 0.4 °C/min. Both experimental and mathematical modeling of PEG 6000 solidification in the P60-E nanocomposite was conducted using a single spherical test cell. The heat transfer during solidification assumes time evolution of both liquid and the two solid radial fronts corresponding to crystalline chains of PEG and amorphous counterpart of PEG and epoxy resin in the P60-E composite. Good agreement between experimental values and calculated theoretical curves was found by using a two-front solids model.

以铝纳米粉（1 wt％）为填充剂P60-E的聚合物相变复合材料（70 wt％聚乙二醇，PEG，6000）-环氧树脂（29 wt％）已开发并首先在球形宏中进行了热测试以便在低能耗的建筑中用于热能存储（TES）系统中。由于相变组分PEG 6000的热行为受到其结晶行为的高度影响，因此将结构数据和热数据关联起来。因此，通过X射线衍射（XRD）发现的PEG 6000组分的高结晶度为82.6％，类似于在冷却时从积分拉曼光谱和DSC数据（潜热为-113.6 J / g）获得的值速度为0.4°C / min。使用单个球形测试单元对P60-E纳米复合材料中的PEG 6000固化进行了实验和数学建模。凝固过程中的传热假定液体和两个固体径向锋面都随着时间的推移而变化，这两个径向锋面分别对应于P60-E复合材料中PEG的结晶链以及PEG和环氧树脂的非晶态对应物。通过使用两个前沿的固体模型，发现实验值和计算的理论曲线之间具有良好的一致性。