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Enhancement of Natural Convection for Cooling Active Antenna Unit Device in 5G Base Station

  • ZHANG Dexin ,
  • DING Bin ,
  • ZHU Chuanyong ,
  • GONG Liang
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  • College of New Energy, China University of Petroleum (East China), Qingdao 266580, China

网络出版日期: 2023-12-01

基金资助

The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (No. 51906257 and No. 52006243) and the Major Program of Nature Science Foundation of Shandong Province (No. ZR2019ZD11).

版权

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2022

Enhancement of Natural Convection for Cooling Active Antenna Unit Device in 5G Base Station

  • ZHANG Dexin ,
  • DING Bin ,
  • ZHU Chuanyong ,
  • GONG Liang
Expand
  • College of New Energy, China University of Petroleum (East China), Qingdao 266580, China

Online published: 2023-12-01

Supported by

The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (No. 51906257 and No. 52006243) and the Major Program of Nature Science Foundation of Shandong Province (No. ZR2019ZD11).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2022

摘要

室外塔端的有源天线单元(AAU)是支撑5G移动通信的关键设备。为了防止夏季AAU设别的温度过高,必须采取有效的降温措施。本文建立了室外环境下双芯片AAU器件的数值模型,研究了自然对流和太阳辐射耦合作用下AAU器件的表面温度分布。此外,还讨论了翅片数目、翅片高度和热流密度对冷却性能的影响。结果表明,本文中翅片数为12的散热效果最好。相比之下,增加翅片高度仍然是提高翅片在室外条件下的冷却性能和抵抗芯片热冲击的有效途径。此外,在翅片上打孔、增加石墨散热器和降低表面发射率是改善散热性能的有效途径。优化后,最高温度总共降低了3.5℃。换言之,这些优化对冷却性能的贡献相当于翅片高度增加了9 mm。

本文引用格式

ZHANG Dexin , DING Bin , ZHU Chuanyong , GONG Liang . Enhancement of Natural Convection for Cooling Active Antenna Unit Device in 5G Base Station[J]. 热科学学报, 2022 , 31(5) : 1551 -1564 . DOI: 10.1007/s11630-022-1667-9

Abstract

The Active Antenna Unit (AAU) on the outdoor tower is the key equipment to support the mobile communication of 5G. To suppress the overheating of AAU in summer, effective cooling measures are essential. In the present study, a numerical model of an AAU device with two chips in the outdoor environment was established to explore the surface temperature distribution under a coupling heat transfer process with natural convection and solar radiation was obtained. Moreover, the effects of the fin number, the fin height and the heat flux were discussed on the cooling performance. The results proved that the fins with a number of 12 presented the best cooling performance in this paper. By contrast, increasing the height of fins was still an effective way to improve the cooling performance of fins in outdoor conditions and to resist the thermal shock of chips. Besides, punching through holes on the fins, adding graphite heat spreader and reducing surface emissivity are effective ways to improve the cooling performance. After the optimizations, the maximum temperature decreased by 3.5°C in total. In other words, the contribution of these optimizations to the cooling performance was equivalent to an increase of fin height in 9 mm.

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