关键词: 石蜡, 复合材料, 热性能, 储能系统, 多孔介质, 纳米粒子

Abstract:

Paraffin wax, as a typical phase change material, has outstanding advantages such as high latent heat value, good stability and low cost. It can absorb or release heat during the phase change process to maintain the temperature of the energy storage system and improve the energy efficiency of the system, and can be applied in many scenarios. However, its inherent defects such as low thermal conductivity and easy leakage during the phase change process seriously restrict the reliability of paraffin wax in large-scale industrial applications and limit its promotion in practical applications. Compositing with functional materials is an effective way to optimize the performance of paraffin wax. This paper introduced four common types of paraffin-based composite phase change materials: Porous paraffin composite phase change materials, paraffin nanoparticle composite phase change materials, paraffin phase change microcapsule composite phase change materials and paraffin multi-component composite phase change materials. It systematically reviewed the modification principles of various functional materials and the performance parameters of the modified composite materials, and elaborated on the research and application of paraffin-based composite phase change materials in various energy storage fields as well as the role of artificial intelligence in the research of phase change materials. The analysis showed that different functional materials had their own advantages in inhibiting leakage, enhancing thermal conductivity and strengthening cycle stability, but it was still difficult to balance cost and latent heat issues. In the future, it was urgent to develop paraffin-based composite phase change materials with low leakage, high thermal conductivity, environmental friendliness, economic adaptability and environmental suitability to meet the diverse market demands.

Key words: paraffin, composite, thermal properties, energy storage system, porous media, nanoparticles