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Experimental investigation on the thermal performance and optimization of heat sink with U-shape heat pipes

机译:U形热管散热性能的实验研究与优化

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摘要

Experimental investigation is carried out to study the thermal performance of a heat sink with finned U-shape heat pipes which is a contemporary central processing unit (CPU) cooler compatible for a wide range of high-frequency microprocessors. The optimum range of operating heat load based on thermal resistance analysis of the heat sink is characterized. The convection heat transfer coefficient between the fins and the ambient air is estimated by using Bessel's modified equation in conjunction with the results obtained through the experimental investigation. The thermal optimization of the heat sink involves the determination of the optimized L-ratio (ratio of the evaporator section length to the condenser section length) of the U-shape heat pipe, by evaluating the minima of the thermal resistance function, in which case the empirical convection heat transfer coefficient is applied in the calculation. In conjunction with this, the optimal L-ratio of a U-shape heat pipe is found to be dependent on other geometrical parameters such as the heat pipe diameter and the fin spacing, which are of practical engineering importance in the optimum design of the heat sink.
机译:进行了实验研究,以研究带翅片U形热管的散热器的热性能,该散热器是当代的中央处理器(CPU)冷却器,可与各种高频微处理器兼容。基于散热器的热阻分析,确定了最佳的工作热负荷范围。通过使用贝塞尔(Bessel)的修正方程以及通过实验研究获得的结果,可以估算散热片与周围空气之间的对流传热系数。散热器的热优化涉及通过评估热阻函数的最小值来确定U形热管的优化L比(蒸发器段长度与冷凝器段长度之比)。计算中采用了经验对流换热系数。与此结合,发现U形热管的最佳L比率取决于其他几何参数,例如热管直径和散热片间距,这些参数在热的最佳设计中具有实际的工程重要性。下沉。

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