The thermal performance of phase change materials (PCM) embedded with fins and metal foam is investigated. Plate fins are attached to the enclosure, and metal foam is embedded between adjacent fins to enhance heat transfer. To predict the melting behavior, a numerical model is established based on the enthalpy-porosity method, considering natural convection, flow resistance induced by metal foam, and non-equilibrium heat transfer. Nine cases considering various geometric parameters, heat transfer enhancement designs, and heated wall temperature are studied. Furthermore, a dimensionless theoretical model is derived to conclude the effect of combined parameters. It shows that the melting time reduces by 24.8 % as the fin height decreases from 80 mm to 50 mm, and the melting time becomes shorter with the decrease of fin thickness. However, the heat flux gets higher for higher fin height and thinner fin thickness. Moreover, the melting rate and heat flux become higher for higher fin volume fraction, lower metal foam porosity, and higher heated wall temperature. Furthermore, the theoretical model reveals that as Stefan number, fin efficiency, and the ratio of thermal diffusivity to the squared fin height become larger, the melting rate becomes higher.

研究了嵌入翅片和金属泡沫的相变材料 (PCM) 的热性能。板翅连接到外壳，金属泡沫嵌入相邻翅片之间以增强热传递。为了预测熔化行为，基于焓-孔隙率方法建立了一个数值模型，考虑了自然对流、金属泡沫引起的流动阻力和非平衡传热。研究了考虑各种几何参数、传热增强设计和受热壁温度的九种情况。此外，推导出无量纲的理论模型来总结组合参数的影响。结果表明，随着翅片高度从80mm减小到50mm，熔化时间减少了24.8%，并且随着翅片厚度的减小熔化时间变短。然而，翅片高度越高，翅片厚度越薄，热通量越高。此外，翅片体积分数越高，金属泡沫孔隙率越低，加热壁温度越高，熔化速率和热通量就越高。此外，理论模型表明，随着 Stefan 数、翅片效率和热扩散率与翅片平方高度的比值变大，熔化速率变高。