Abstract

In order to enhance the heat transfer performance, the screen mesh wick and the inside wall of the container of a heat pipe were pre-coated with a silica nanoparticle layer. When the screen mesh was coated, the thermal resistance decreased by 47% on average. This would be attributed to enhanced wicking performance of screen mesh by the nanoparticle layer. When the container inside wall was coated, reduction of the thermal resistance was less significant but the heat pipe worked well even when the wire mesh was eliminated. This demonstrates that the nanoparticle layer on the wall acted as a very thin wick. It is expected that nanoparticle coating on the screen mesh contributes to the improvement of heat transfer performance of the heat pipe and that on the container inner wall contributes to the downsizing.

摘要

为了提高传热性能，热管的筛网芯和容器内壁都预涂有二氧化硅纳米颗粒层。涂覆筛网后，热阻平均下降47%。这将归因于纳米颗粒层增强了筛网的芯吸性能。当容器内壁涂有涂层时，热阻的降低不太显着，但即使取消了金属丝网，热管也能很好地工作。这表明壁上的纳米颗粒层充当了非常薄的灯芯。预计筛网上的纳米粒子涂层有助于提高热管的传热性能，而容器内壁的纳米粒子涂层有助于缩小尺寸。