Effect of an Auxiliary Plate on Passive Heat Dissipation of Carbon Nanotube-Based Materials
Effect of an Auxiliary Plate on Passive Heat Dissipation of Carbon Nanotube-Based Materials
复制标题
辅助板对碳纳米管基材料被动散热的影响
DOI：
10.1021/acs.nanolett.7b04933
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发表时间：
2018
期刊：
影响因子：
10.8
通讯作者：
Fan Shoushan
中科院分区：
文献类型：
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作者：
Yu Wei;Duan Zheng;Zhang Guang;Liu Changhong;Fan Shoushan
碳纳米管（Carbon nanotubes, CNTs）和其他相关的碳纳米管基材料具有高导热性，是一种很有前途的散热材料。同时，便携式电子产品（如笔记本电脑和移动电话）的小型化和高功能性是以高功率密度组件过热为代价实现的。对于在相对狭窄的空间内发生的热点，需要简单有效的冷却方法。在这里，通过平板（铝镁合金）的辅助被动冷却方法进行了研究，以适应狭窄空间的散热。冷却效率可提高到43.5%。在这种情况下，比较了几种碳纳米管样品的冷却性能。散热分析表明，当附近有辅助冷却板时，热辐射减弱，自然对流大大增强。因此，在不减少自然对流的情况下，通过增加发射率来改善热辐射可以有效地提高冷却性能。此外，在辅助冷却板上喷涂CNTs可以进一步提高整个装置的冷却性能。
Carbon nanotubes (CNTs) and other related CNT-based materials with a high thermal conductivity can be used as promising heat dissipation materials. Meanwhile, the miniaturization and high functionality of portable electronics, such as laptops and mobile phones, are achieved at the cost of overheating the high power-density components. The heat removal for hot spots occurring in a relatively narrow space requires simple and effective cooling methods. Here, an auxiliary passive cooling approach by the aid of a flat plate (aluminum–magnesium alloy) is investigated to accommodate heat dissipation in a narrow space. The cooling efficiency can be raised to 43.5%. The cooling performance of several CNT-based samples is compared under such circumstances. Heat dissipation analyses show that, when there is a nearby plate for cooling assistance, the heat radiation is weakened and natural convection is largely improved. Thus, improving heat radiation by increasing emissivity without reducing natural convection can effectively enhance the cooling performance. Moreover, the decoration of an auxiliary cooling plate with sprayed CNTs can further improve the cooling performance of the entire setup.