某型号笔记本计算机散热分析

Analysis on heat distribution of a model notebook computer

针对笔记本计算机热流密度大,温度较高的难题,利用k-ε双方程模型对其温度场和速度场进行数值模拟.同时对其温度场和速度场进行了实验测量.通过数值模拟和实验得出了笔记本计算机CPU和显卡的温度和风扇的速度分布.针对温度和速度场的特点,调整CPU与显卡的距离、改变风扇参数和增设热管三项措施来改进原机的散热设计.结果表明:增大风扇流量,增设热管都能有效增强笔记本计算机的散热能力.

Because of high heat flux and high temperature in notebook computers, a numerical simulation is made by k-ε two equation model. The temperature distribution in the CPU and display card and velocity distribution of CPU and display card＇s fans are obtained. Velocity and temperature fields are also measured by velocity and temperature sensors. Distance adjustment between CPU and display card, parameter adjustment of fans and addition of a heat pipe are made to improve heat distribution according to the fields. By the analysis, increasing fan flow and addition of a heat pipe can effectively hasten heat dissipation of the notebook computer.