一种计算机CPU被动式散热器的设计、仿真与实验研究

Design,simulation and experimental study of a passive heat sink for computer CPU

针对当前高功率CPU静音散热需求,提出了一种新型被动式散热器.应用数值仿真与实验验证的方式对该散热器在不同加热功率下的温度、启动性能、热阻进行了研究.仿真结果表明:在120 W加热条件下,该散热器温度分布均匀,波动较小,最高温度仅为64.00℃,启动时间在900 s左右,平均接触热阻处在0.01~0.2℃/W之间.实验结果表明:在120 W加热条件下,该散热器最高温度仅为68.28℃,启动时间在900 s左右,平均接触热阻仅为0.11℃/W,满足计算机CPU在该功率下正常运行需求.

A new type of passive heat sink is proposed to address the current demand for silent heat dissipation in high-power CPUs.The temperature,start-up performance,and thermal resistance of the heat sink under different heating powers were studied through numerical simulation and experimental verification.The simulation results show that under 120 W heating conditions,the temperature distribution of the radiator is uniform,with small fluctuations.The maximum temperature is only 64.00℃,the startup time is about 900s,and the average contact thermal resistance is between 0.01~0.2℃/W.The experimental results show that under 120 W heating conditions,the maximum temperature of the heat sink is only 68.28℃,the startup time is about 900s,and the average contact thermal resistance is only 0.11℃/W,meeting the normal operation requirements of the computer CPU at this power.