芒硝基相变储能材料的研究进展

Research Progress in Glauber's Salt Based Phase Change Materials

芒硝(Na_(2)SO_(4)·10H_(2)O)作为一种原料易得、储能密度大的无机水合盐类相变储能材料(Phase Change Materials,PCMs),拥有相变温度适中、储能高等优点,然而,过冷度大、相分层严重、易泄露和导热率低等问题限制了芒硝基PCMs的大规模应用。通过总结关于过冷和相分离问题的改性方法,归纳比较了各类封装的原理及效果,并概述了通过导热强化来提高芒硝基PCMs储放热效率的研究进展。最后,对该材料的实际应用现状进行阐述,并展望了其发展方向,为开发高稳定性、高效封装、高导热率芒硝基PCMs提供参考依据。

Glauber's salt(Na_(2)SO_(4)·10H_(2)O),as inorganic hydrated salt-based phase change materials(PCMs),with easy-to-obtain raw materials and high energy storage density,has the advantages of high energy storage density and a phase change temperature close to the ambient temperature,etc.However,due to the problems of large supercooling,serious phase delamination,easy leakage and low thermal conductivity,large-scale applications of Glauber's salt based PCMs have been limited.This review is aimed to describe the current modification methods to address the problems of subcooling and phase separation,summarize the effects of various types of encapsulations,and review the progress of research on thermal conductivity enhancement to improve heat storage efficiency.Additionally,the status of practical applications of Glauber's salt based PCMs was discussed,with an outlook on the future direction of research,to provide a reference for the development of highly stable,efficiently encapsulated,high thermally conductive Glauber's salt based PCMs.