Simulasi haba stesen pangkalan 5G

     5G AAU base station adopts large-scale antenna technology, and both the number of antenna arrays and the power consumption of the whole machine are doubled on the basis of 4G. AAU base station is developing towards miniaturization and lightweight, resulting in the increasing volume power density of the base station, so the heat dissipation design of the base station is becoming more and more difficult. Therefore, in the process of thermal design, thermal simulation can help engineers find the optimal scheme more quickly to a certain extent.

      At present, the overall power consumption of most 5G base stations is more than 1200W. The size and width of AAU are about 500mm, the height is about 900mm, and the weight is less than 47kg. In a sense, the size and weight of the machine represent the competitiveness of the manufacturer. The simulation analysis of base station heat dissipation based on Flotherm software can shorten the R D cycle, reduce the production cost, and have a higher degree of visualization of results.

Shell emissivity:       

     The infrared emissivity of the base station shell directly affects the radiant heat exchange between the base station and the environment. The simulation conditions of the AAU are as follows: the ambient temperature is 30 degree ; The shell wall thickness is initially determined as 4mm, and the shell material is aluminum alloy 6061; The power consumption of the whole machine is 1200W. The infrared emissivity of shell materials is set to 0.9, 0.8, 0.7 and 0.6 respectively. The overall heat dissipation effects corresponding to four different emissivity materials are compared through simulation.

      With the increase of shell emissivity, the maximum surface temperature of the shell decreases continuously. When the shell emissivity is {{0}}.9, the maximum temperature of the shell is 88.6 degree , when the shell emissivity is 0.8, the maximum temperature of the shell is 90.9 degree , when the shell emissivity is 0.7, the maximum temperature of the shell is 93.6 degree , and when the shell emissivity is 0.6, the maximum temperature of the shell is 96.8 degree . The reason why the maximum temperature of the shell decreases, Because the high emissivity material improves the radiation heat transfer, it is necessary to use the high emissivity shell material for the equipment using natural convection heat dissipation such as 5G base station.

Sirip cangkerang:

      Shell fins directly affect the heat dissipation area of the base station, thus affecting the heat dissipation of the whole base station. Therefore, it is of great significance to study the number of shell fins and discontinuous fins for efficient heat dissipation of the base station.

     With the increase of the number of fins, the maximum temperature of the shell gradually decreases, but the gradient of temperature reduction gradually decreases. This shows that increasing the number of heat dissipation fins will increase the heat dissipation area, thus increasing the heat dissipation capacity of the base station. However, with the increase of the number of fins, the air flow resistance between the fins will also increase, Thus, the temperature reduction gradient gradually decreases. There is an optimal number of fins for a specific base station. When actually developing a base station, the optimal number of fins should be selected by comprehensively considering factors such as heat dissipation, cost, weight and so on.

    With the wide use of 5G equipment, the heat dissipation of the base station has become a key factor. Only good thermal design of the base station and control the working temperature of the core chip and shell within the allowable range can effectively ensure that the base station equipment has a long working life.