Thermal Property Enhancement of a Novel Shape-Stabilized Sodium Acetate Trihydrate-Acetamide/Expanded Graphite-Based Composite Phase Change Material

作     者：AN Zhoujian HOU Wenjie DU Xiaoze HUANG Zhongzheng MOMBEKI PEA Hamir Johan ZHANG Dong LIU Xiaomin AN Zhoujian;HOU Wenjie;DU Xiaoze;HUANG Zhongzheng;MOMBEKI PEA Hamir Johan;ZHANG Dong;LIU Xiaomin

作者机构：College of Energy and Power EngineeringLanzhou University of TechnologyLanzhou730050China Key Laboratory of Multi-supply System with Solar Energy and Biomass of Gansu ProvinceLanzhou730050China Gansu Natural Energy Research InstituteLanzhou730046China 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2024年第33卷第4期

页      面：1564-1576页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by the National Natural Science Foundation of China(52206087 52130607) the Key R&D Program of Gansu Province(23YFGA0066 23YFGA0035) the Industrial Support Plan Project of Gansu Provincial Education Department(2022CYZC-21 2021CYZC-27) the Doctoral Research Funds of Lanzhou University of Technology(061907) the Incubation Program of Excellent Doctoral Dissertation-Lanzhou University of Technology the Red Willow Excellent Youth Project of Lanzhou University of Technology the Open Fund of Key Laboratory of Multi-supply System with Solar Energy and Biomass of Gansu Province 

主　　题：sodium acetate trihydrate melting point modification agent expanded graphite shape stability thermal conductivity enhancement 

摘      要：Phase change materials(PCMs)are a kind of highly efficient thermal storage materials which have a bright application prospect in many fields such as energy conservation in buildings,waste heat recovery,battery thermal management and so *** inorganic hydrated salt PCMs have received increasing attention from researchers due to their advantages of being inexpensive and ***,inorganic hydrated salt PCMs are still limited by the aspects of inappropriate phase change temperature,liquid phase leakage,large supercooling and severe phase separation in the application *** this work,sodium acetate trihydrate was selected as the basic inorganic PCM,and a novel shape-stabilized composite phase change material(CPCM)with good thermal properties was prepared by adding various functional *** first,the sodium acetate trihydrate-acetamide binary mixture was prepared and the melting point was adjusted using *** the binary mixture was incorporated into expanded graphite to synthesize a novel shape-stabilized *** thermophysical properties of the resultant shape-stabilized CPCM were systematically *** microscopic morphology and chemical structure of the obtained shape-stabilized CPCM were characterized and *** experiment results pointed out that acetamide could effectively lower the melting point of sodium acetate *** obtained shape-stabilized CPCM modified with additional 18%(mass fraction)acetamide and 12%(mass fraction)expanded graphite exhibited good shape stability and thermophysical characteristics:a low supercooling degree of 1.75℃and an appropriate melting temperature of 40.77℃were obtained;the latent heat of 151.64 kJ/kg and thermal conductivity of 1.411 W/(m·K)were also ***,after 50accelerated melting-freezing cycles,the obtained shape-stabilized CPCM represented good thermal reliability.