Thermal Management of Electronic Devices Using Combined Effects of Nanoparticle Coating and Graphene–Water Nanofluid in a Miniature Loop Heat Pipe
Thermal Management of Electronic Devices Using Combined Effects of Nanoparticle Coating and Graphene–Water Nanofluid in a Miniature Loop Heat Pipe
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DOI：
10.1109/tcpmt.2018.2846561
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发表时间：
2018-07
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影响因子：
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通讯作者：
T. Tharayil;L. G. Asirvatham;S. Rajesh;S. Wongwises
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作者：
T. Tharayil;L. G. Asirvatham;S. Rajesh;S. Wongwises
使用具有石墨烯-水纳米流体纳米颗粒涂层蒸发器的微型环路热管 (mLHP) 研究电子设备的热管理，例如高端中央处理单元、图形处理单元、绝缘栅双极晶体管和运行在 20 至 380 W 之间的低压配电盘中的断路器。采用热蒸发法在蒸发器表面沉积铜纳米颗粒，涂层厚度为400 nm。实验结果表明，与具有未涂层和以蒸馏水作为工作流体的涂层蒸发器的mLHP相比，纳米粒子涂层和纳米流体的组合提供了最高的传热。纳米流体的使用增强了mLHP的传热性能，在最佳纳米流体体积浓度为0.006%时，热阻平均降低45.2%，蒸发器传热系数平均提高113.4%。类似地，对于不同的热负荷，相同浓度的纳米流体也获得了最低的蒸发器温度。通过重复测试还发现，具有纳米颗粒涂层和纳米流体的mLHP的实验结果具有可重复性，适合长期运行。
The thermal management of electronic devices such as high-end central processing units, graphic processing units, insulated gate bipolar transistor, and circuit breaker in low-voltage switchboard operating between 20 and 380 W is investigated using a miniature loop heat pipe (mLHP) having nanoparticle-coated evaporator with graphene–water nanofluid. The thermal evaporation method is used to deposit copper nanoparticles on the evaporator surface for a coating thickness of 400 nm. The experimental results show that the combination of nanoparticle coating and nanofluid gives the highest heat transfer compared to the mLHP having uncoated and coated evaporator with distilled water as a working fluid. The use of nanofluid enhances the heat transfer performance of mLHP with an average reduction of 45.2% in thermal resistance and an average enhancement of 113.4% in evaporator heat transfer coefficient for the optimum nanofluid volume concentration of 0.006%. Similarly, the lowest evaporator temperatures are also obtained with the same concentration of nanofluid for various heat loads. The experimental results of mLHP having nanoparticle coating and nanofluid are also found to be repeatable from the repeated tests and suitable for a long-term operation.