材料科学
传热
相变材料
热能储存
化学工程
热导率
对流换热
泥浆
传热系数
悬挂(拓扑)
复合材料
纳米-
强化传热
强化传热
热的
临界热流密度
相(物质)
热力学
化学
有机化学
物理
数学
同伦
纯数学
工程类
作者
Hang Zhang,Mengke Wang,Xiaoyu Yan,Guomin Cui,Binlin Dou,Wei Lu,Qiguo Yang
出处
期刊:Energy
[Elsevier]
日期:2024-01-01
卷期号:286: 129617-129617
标识
DOI:10.1016/j.energy.2023.129617
摘要
Three nanoscale metal oxides composed of nano TiO2, nano Al2O3, and nano MgO were added to the phase change microcapsule slurry for optimising the heat transfer behaviour. The thermal and rheological properties of the resulting microencapsulated phase change materials (MPCMs) and microencapsulated phase change material slurries (MPCSs) were characterized to determine the effects of added metal oxides in optimising the performance of MPCSs. The impacts of factors like metal oxides, concentrations, and flow rates on the heat transfer behaviour of MPCSs were investigated by forced convective heat transfer experiment with various working conditions. Compared to 6 wt% MPCSs, the heat transfer coefficients (hx) of 6 wt% slurries containing 1 wt% TiO2, 1 wt% Al2O3, and 1 wt% MgO increased by 4.0 %, 2.5 %, and 7.13 %, respectively. Nano-MgO showed the most significant heat transfer enhancement effect on MPCSs. Moreover, the heat transfer performance gradually enhanced as a function of the concentration for nano MgO. Overall, the addition of metal oxides enhanced heat transfer by increasing the thermal conductivity of the slurry, as well as improved the micro-convection effect. The proposed MPCSs are promising for applications in solar photovoltaic/thermal (PV/T) systems, chip cooling, thermal management, buildings, and automotive cooling.
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