文献类型：期刊文献

英文题名：Preparation and properties of NH4Al(SO4)2?12H2O- CH3COONa?3H2O eutectic phase change materials and supercooling modification

作者：Li, Jiachen[1,2];Hu, Biao[1,3];Wang, Hui[1];Yang, Jinxin[3];Li, Chunwang[1];Du, Xin[2]

第一作者：Li, Jiachen

通讯作者：Wang, H[1]

机构：[1]Beijing Union Univ, Coll Biochem Engn, Beijing 100023, Peoples R China;[2]Univ Sci & Technol Beijing, Sch Chem & Biol Engn, Beijing 100083, Peoples R China;[3]Beijing Univ Technol, Coll Mech & Energy Engn, Beijing 100124, Peoples R China

第一机构：北京联合大学生物化学工程学院

通讯机构：[1]corresponding author), Beijing Union Univ, Coll Biochem Engn, Beijing 100023, Peoples R China.|[1141726]北京联合大学生物化学工程学院;[11417]北京联合大学;

年份：2025

卷号：302

外文期刊名：SOLAR ENERGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001598356800001)】；

基金：This work was supported by the National Natural Science Foundation of China (No.52306290) and the Academic Research Projects of Beijing Union University (No. ZK10202506) .

语种：英文

外文关键词：Eutectic phase change materials; Ammonium aluminum sulfate dodecahydrate; Sodium acetate trihydrate; Nucleating agents; Supercooling degree

摘要：A eutectic hydrate salt phase change material composed of NH4Al(SO4)2 center dot 12H2O-CH3COONa center dot 3H2O was prepared. The eutectic composition, determined experimentally to consist of 92.5 wt% NH4Al(SO4)2 center dot 12H2O and 7.5 wt% CH3COONa center dot 3H2O, deviated significantly from predictions made by the Scholar's equation, highlighting the need for optimization of theoretical prediction methods. The eutectic material exhibited promising thermal storage properties, but a significant supercooling degree of 12.98 K was observed. To mitigate this issue, 14 different nucleating agents were evaluated and five nucleating agents were identified as effective in reducing the supercooling degree to below 1 degrees C. Furthermore, the thermophysical properties of the eutectic phase change materials with five preferred nucleating agents, including phase change temperature, latent heat, volume expansion ratio and thermal storage density, were characterized using differential scanning calorimetry, T-history, and solid-liquid density testing. Among the five preferred nucleating agents, Nano Cu demonstrated the best performance, achieving a high thermal storage density of 223.45 kJ/kg and a minimal volume expansion ratio of 4.92 %. Future studies will focus on optimizing heat transfer characterization and integrating this material into renewable energy-based heating systems such as heat pumps, solar heating systems, and valley electric heating systems to achieve sustainable and efficient heating solutions.