Phase-Change Material (PCM) attracted much attention due to its high thermal storage density under the small temperature variation, its poor thermal conductivity limited the thermal charging/discharging efficiency significantly. To overcome this deficit, fins were produced by copper foam to improve the thermal performance of PCM and seven Copper Foam Fin (CFF) shapes were considered with the same filling ratio of 50%. The numerical simulation was employed with the two-temperature non-equilibrium model. Results showed the solidifying process with the liquid fraction variation from 100% to 30% had the similar rules with the melting process with the liquid fraction variation from 0% to 70%, but the solidifying time with the liquid fraction variation from 30% to 0% was much higher than the melting time with the liquid fraction variation from 70% to 100%. The preferable CFF shape was gained with the longer left-side length, close to the hot and cold source. And there was the natural-convection heat transfer in solidifying and melting processes, but the natural convection intensity was too small to be considered in the solidifying process.

相变材料（PCM）由于其在小温度变化下的高储热密度而备受关注，其导热系数差会极大地限制热充/放电效率。为了克服这一缺陷，用泡沫铜生产翅片以改善PCM的热性能，并考虑了7种铜泡沫翅片（CFF）的形状，其填充率为50％。数值模拟用于两温非平衡模型。结果表明，液体含量在100％至30％之间变化的凝固过程与液体含量在0％至70％之间变化的熔化过程具有相似的规律，但是，液体分数从30％到0％变化的凝固时间要比液体分数从70％到100％变化的熔化时间长得多。在靠近热源和冷源的情况下，左侧的长度越长，获得的CFF形状越好。凝固和熔化过程中存在自然对流传热，但是自然对流强度太小，无法在凝固过程中考虑。