Müller Lukas, Rubio-Pérez Gabriel, Bach Andreas, Muñoz-Rujas Natalia, Aguilar Fernando, Worlitschek Jörg
Competence Centre Thermal Energy Storage (TES), Lucerne University of Applied Sciences and Arts, 6048 Horw, Switzerland.
Escuela Politécnica Superior, Universidad de Burgos, 09006 Burgos, Spain.
Materials (Basel). 2020 Oct 10;13(20):4486. doi: 10.3390/ma13204486.
Measuring thermo-physical properties of phase change materials (PCM) in a consistent and reliable manner is essential for system layout of thermal energy storages and correspondingly material selection. Only if basic properties are assessed in a comparable way a selection process leads to the top candidate for any given application and thus enhances market penetration of renewable energy sources coupled with thermal energy storage. In this study, we focus on differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) as basic assessment techniques and develop consistent measurement procedures to create a database with comparable results. We show consistency of the measured results through analysis of coefficient of variation (CV), being in the mean 1.69%, 0.05%, 0.06% and 4.00% for enthalpy, melting onset, melting peak and maximum operating temperature, respectively. Overall, 23 PCM have been measured with the presented methodology, which was mainly possible due to the reduced measurement and preparation time per PCM compared to standard techniques, while achieving similar accuracy and precision.
以一致且可靠的方式测量相变材料（PCM）的热物理性质对于热能存储系统布局以及相应的材料选择至关重要。只有以可比较的方式评估基本性质，选择过程才能为任何给定应用选出最佳候选材料，从而提高与热能存储相结合的可再生能源的市场渗透率。在本研究中，我们专注于差示扫描量热法（DSC）和热重分析（TGA）作为基本评估技术，并开发一致的测量程序以创建具有可比结果的数据库。我们通过分析变异系数（CV）来展示测量结果的一致性，焓、熔化起始温度、熔化峰值温度和最高工作温度的变异系数平均值分别为1.69%、0.05%、0.06%和4.00%。总体而言，已使用所提出的方法对23种相变材料进行了测量，这主要得益于与标准技术相比，每种相变材料的测量和制备时间减少，同时实现了相似的准确度和精密度。
