Abstract

An investigation of the effect of the thermal performance of the flattened heat pipe on its double heat sources acting as central processing unit and graphics processing unit in laptop computers is presented in this work. A finite element method is used for predicting the flattening effect of the heat pipe. The cylindrical heat pipe with a diameter of 6 mm and the total length of 200 mm is flattened into three final thicknesses of 2, 3, and 4 mm. The heat pipe is placed under a horizontal configuration and heated with heater 1 and heater 2, 40 W in combination. The numerical model shows good agreement compared with the experimental data with the standard deviation of 1.85%. The results also show that flattening the cylindrical heat pipe to 66.7 and 41.7% of its original diameter could reduce its normalized thermal resistance by 5.2%. The optimized final thickness or the best design final thickness for the heat pipe is found to be 2.5 mm.

中文翻译：

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用于笔记本电脑中CPU和GPU冷却的双热源扁平热管的数值模拟

摘要

本文研究了扁平热管的热性能对其在笔记本计算机中用作中央处理器和图形处理器的双重热源的影响。使用有限元方法来预测热管的扁平化效果。将直径为6毫米，总长度为200毫米的圆柱形热管压平为三个最终厚度，分别为2、3和4 mm。将热管水平放置，并用加热器1和加热器2组合加热40W。数值模型与实验数据吻合良好，标准偏差为1.85％。结果还表明，将圆柱形热管扁平化至其原始直径的66.7和41.7％可将其归一化热阻降低5.2％。