Abstract

The operation of heat sinks is completely dependent on temperature, and if the temperature rises above the allowable range, the efficiency drops sharply. In this study, the main purpose is to keep an electronic component cool by installing cylindrical pin-fins with a diameter of D. By changing the diameter of the pin-fins, the variations in pressure drop (PD) along with heat transfer are examined. As the diameter rises, the lateral area of the pin-fin boosts (positive effect) and at the same time the contact surface resistance of the pin-fins with the electronic base increases (negative effect). Three layouts were used to enhance the effectiveness of the pin-fins. The results showed that with increasing the diameter, the heat transfer improves while PD boosts more sharply. Layout A imposes an extra PD on the system, so that by installing a 2.5 mm diameter pin-fin, PD intensifies by 393%. Layout B has the highest heat transfer intensification among the others. Installing a 2.5 mm diameter pin-fin improves heat transfer by 15% and boosts PD by 365%.

摘要

散热器的运行完全取决于温度，如果温度升高到允许范围以上，效率会急剧下降。在这项研究中，主要目的是通过安装直径为D的圆柱形针翅来保持电子元件的冷却. 通过改变针翅片的直径，可以检查压降 (PD) 随热传递的变化。随着直径的增加，pin-fin 的横向面积增加（正效应），同时 pin-fin 与电子基座的接触表面电阻增加（负效应）。三种布局用于增强针鳍的有效性。结果表明，随着直径的增加，热传递得到改善，而 PD 增加得更明显。布局 A 对系统施加了额外的 PD，因此通过安装 2.5 mm 直径的针翅，PD 增强了 393%。布局 B 在其他布局中具有最高的传热强度。安装直径为 2.5 毫米的针翅片可将热传递提高 15%，并将 PD 提高 365%。