Journal of South China University of Technology(Natural Science) >
Study on Heat Transfer Characteristics of Aluminum Plates with Different Surface Micro-Functional Structures
Received date: 2024-04-28
Online published: 2024-07-22
Supported by
the Natural Science Foundation of Guangdong Province(2023A1515011635);the Gateway Router Product Heat Dissipation Key Technical Cooperation Project(D8230630)
The development needs of miniaturization, lightness and low cost of electronic products have posed significant challenges to the design and manufacture of heat dissipation modules. In order to solve the heat dissipation pro-blem of thin high-performance routers and small electronic devices, 6 kinds of aluminum plate radiators with surface micro-functional structures were designed on the basis of smooth aluminum plate radiators. According to the newly designed aluminum plate radiators, an experimental test platform was built. Under the conditions of natural convection and micro-convection, the heat dissipation performance of the 6 new aluminum plate radiators was compared with that of the smooth aluminum plate radiators. The results show that under the condition of natural convection, when the heat source power is 3.0~6.0 W, the heat dissipation performance of the square pin-fin aluminum plate is the best. Compared with the smooth surface aluminum plate, the average Nusselt number is increased by about 18%, the product of heat transfer coefficient and heat transfer area is increased by about 17%, and the heat source temperature is reduced by about 2.0 K. Compared with smooth surface aluminum plate, the average Nusselt number of round pin-fin aluminum plate increases by 7%, the product of heat transfer coefficient and heat transfer area increases by about 5%, and the heat source decreases by about 1.3 K. After surface treatment, the sandblasted square pin-fin aluminum plate can reduce the heat source temperature by 2.0~3.9 K, and the nano-carbon square pin-fin aluminum plate can reduce the heat source temperature by 5.3~8.6 K. The sandblasted round pin-fin aluminum plate can reduce the heat source temperature by 1.9~2.5 K, and the nano-carbon round pin-fin aluminum plate can reduce the heat source temperature by 4.9~7.7 K. Under the micro-convection condition of wind speed of 2 m/s, the round pin-fin aluminum plate has the best heat dissipation performance. Compared with the smooth surface aluminum plate, the average Nusselt number is increased by about 8%, the temperature of the heat source is reduced by 3.6 K at 6 W, and the thermal resistance is reduced by 18%. Compared with the smooth surface aluminum plate, the average Nusselt number of the square pin-fin aluminum plate is increased by about 6%, the temperature of the heat source can be reduced by 2.4 K at 6 W, and the thermal resistance is reduced by 11%. The higher the heat source power, the better the heat dissipation performance of the aluminum plate with surface micro-functional structure compared with the smooth surface aluminum plate.
LI Yong , WANG Huipan , HE Jiabin , JIANG Kejun , CHEN Xinyu . Study on Heat Transfer Characteristics of Aluminum Plates with Different Surface Micro-Functional Structures[J]. Journal of South China University of Technology(Natural Science), 2025 , 53(4) : 61 -71 . DOI: 10.12141/j.issn.1000-565X.240208
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