【摘要】 基于相变储热材料存在导热系数低的问题,研究者利用金属导热系数高的特点,与相变储热材料复合,通过理论分析、数值模拟、实验研究三方面来研究复合相变材料导热性的变化,金属与相变储热材料复合后,显著提高了相变储热材料的热导率,但同时对储热装置的储热能力以及自然对流等性能又具有一定的抑制作用。文章综述了近年来国内外学者对金属复合相变储热材料导热性的研究进展,分析了多孔泡沫金属、金属颗粒、纳米颗粒、金属矩阵等几种主要强化方法,并探讨了今后相关方面的研究重点,提出泡沫金属和纳米颗粒对相变储热材料热导率强化的优点,同时应加强这两方面的理论研究,开拓其在市场上的应用。更多还原

【Abstract】 This paper reviews the recent developments metal-phase change material composites with a focus on thermal conductivity. There have been numerous studies in the literature using theoretical, numerical simulation and experimental methods. Metals in the composite occur mainly in three forms, porous foams metals, dispersed metallic particles, and metallic matrices. Most phase change(PCMs) have a low thermal conductivity. Addition of metallic components increases the thermal conductivity but suppresses the effects of natural convection and the heat storage capacity of heat storage apparatus when PCMs are at the liquid state. As a result, there is an urgent need for both basic and applied research on the area.更多还原