Solidification enhancement of phase change materials using nanoparticles and metal foams with nonuniform porosity
Solidification enhancement of phase change materials using nanoparticles and metal foams with nonuniform porosity
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DOI：
10.1016/j.est.2021.103420
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发表时间：
2021-12
影响因子：
9.4
通讯作者：
J. Lei;C. Yang;Xuhui Huang;Zhihao Li;Ying Zhang
中科院分区：
文献类型：
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作者：
J. Lei;C. Yang;Xuhui Huang;Zhihao Li;Ying Zhang
相变材料是潜热储能系统的重要组成部分.采用纳米颗粒和泡沫金属可以克服相变材料导热系数低的缺点。在本研究中，不同的孔隙率和纳米颗粒的金属泡沫LHTES凝固过程中的效果进行了数值研究。分析了凝固时间、温度响应速率、温度分布和火用效率等参数。随着纳米粒子体积分数从0增加到0.1，凝固时间缩短了30.15%，放热效率从55%增加到60%。与纯相变材料相比，孔隙率均匀的多孔相变材料的凝固时间缩短了81.2%。沿沿着x方向均匀孔隙率和增大孔隙率的放热效率分别为90.7%和93.0%。
Phase change material (PCM) is an essential component in latent heat thermal energy storage (LHTES). Using nanoparticles and metal foams could overcome the low thermal conductivity of PCM. In the present study, the effect of metal foams with varying porosity and nanoparticles on the solidification process of LHTES was numerically investigated. Parameters such as solidification time, temperature response rate, temperature distribution and exergy efficiency were analysed. As the volume fraction of nanoparticle was increased from 0 to 0.1, the solidification time was reduced by 30.15%, and the heat release exergy efficiency was increased from 55% to 60%. Compare with pure PCM, the solidification time of porous PCM with uniform porosity was reduced by 81.2%. Moreover, the heat release exergy efficiencies were 90.7% and 93.0% for the uniform porosity and the increasing porosity along x-direction, respectively.