矿物基复合相变储热材料的研究进展

Research Progress of Mineral-based Composite Phase Change Heat Storage Materials

  • 摘要: 相变材料(PCM)因其高效且可逆的储热特性,成为缓解能源供需时空错配的关键媒介。然而,传统PCM存在热导率低、固液相变过程泄漏及功能单一等瓶颈,严重制约了其更广泛的应用与发展。天然矿物具备独特的结构、优异的吸附能力和丰富的活性位点,且成本低廉、易于获取,可以作为构建形状稳定的复合相变材料的支撑基体,通过封装PCM并与其它功能材料复合,可制备出复合相变材料(CPCM),有效解决相变储热领域的诸多问题。本文首先介绍了矿物基CPCM的层状封装、管状封装、多孔封装、核壳封装和网络封装五种封装技术,并对比了各自的优缺点。重点综述了不同维度矿物基CPCM在克服PCM缺点方面的最新研究进展,并总结了提升矿物基CPCM潜热和热传导率的基本机制与方法。此外,还介绍了矿物基CPCM在建筑节能、太阳能和热管理等领域的实际应用。最后,强调了矿物基CPCM研究中面临的一些挑战及其未来的发展方向,为开发新型且综合性能优异的CPCM提供了更多研究思路。

     

    Abstract: Phase change materials (PCM) have become a key medium to alleviate the time-space mismatch of energy supply and demand due to their efficient and reversible heat storage properties. Natural minerals feature unique structures, excellent adsorption capacity and abundant active sites, along with low cost and easy accessibility, making them ideal supporting substrates for constructing shape-stabilized composite phase change materials. By encapsulating PCM and compounding them with other functional materials, composite phase change materials (CPCM) can be prepared, which effectively address numerous challenges in the field of phase change heat storage. Five encapsulation technologies of mineral-based CPCM, namely layered encapsulation, tubular encapsulation, porous encapsulation, core-shell encapsulation and skeleton encapsulation, are introduced and their advantages and disadvantages are compared. The latest research progress of mineral-based CPCM with different dimensions in overcoming the disadvantages of PCM is summarized, and the basic mechanisms and methods for improving the latent heat and thermal conductivity of mineral-based CPCM are summarized. In addition, the practical applications of mineral-based CPCM in building energy saving, solar energy and thermal management are also introduced.; Finally, some challenges in mineral-based CPCM research and its future development direction are emphasized, which provides more research ideas for developing new CPCM with excellent comprehensive properties

     

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