关键词: 相变, 多孔介质, 焓, 复合材料

Abstract: Solid-liquid phase change material (PCM) is a key factor in the development of thermal energy storage (TES) technology. However，some inherent problems，such as leakage and low thermal conductivity, seriously restrict the performance of phase change materials. Therefore，choosing an appropriate method to construct form-stable composite phase change material (FSCPCMs) and effectively improving its thermal conductivity is an important prerequisite for the practical application of phase change materials. Porous carrier encapsulated phase change materials provide an effective way to construct shaped composite phase change materials with high energy storage density and excellent heat transfer properties. In this paper，the preparation，structural thermal properties and applications of different FSCPCMs are reviewed，and the effects of pore size and geometry，surface modification，force and composition on the phase transition behavior of FSCPCMs are summarized and discussed in detail. This paper focuses on the design and application of new porous composite phase change materials with high thermal conductivity, high load rate and high latent heat. Finally, based on theoretical, numerical and experimental methods, the future research direction of FSCPCMs in phase transition and multi-scale heat transfer in constrained structures and its commercial application in energy conversion are prospected.

Key words: phase transformation, energy storage materials, porous, form stability