Abstract

Efficient heat transport and energy conversion are key factors for realizing a commercial fusion reactor. A promising method for enhancing heat transport performance and simplifying the transport system is thermosiphon. However, the maximum heat flux in the evaporation unit [namely, boiling heat transfer (BHT)] of the thermosiphon system should be improved to remove heat at high heat fluxes (>10 MW/m²). To improve BHT, we propose a new technique using a vibration material excited by boiling bubbles. In this study, we investigated the characteristics of BHT with and without the vibration material with pure water at atmospheric pressure to demonstrate our concept. We demonstrated that the vibration material enhances BHT when the vibration is synchronized with the frequency of boiling bubbles emitted from the heating surface.

摘要

高效的热传输和能量转换是实现商业聚变反应堆的关键因素。一种提高热传输性能和简化传输系统的有前途的方法是热虹吸。然而，应改进热虹吸系统的蒸发单元 [即沸腾传热 (BHT)] 中的最大热通量，以在高热通量 (>10 MW/m ²）。为了改进 BHT，我们提出了一种使用由沸腾气泡激发的振动材料的新技术。在这项研究中，我们在大气压下用纯水研究了有和没有振动材料的 BHT 的特性，以证明我们的概念。我们证明，当振动与从加热表面发出的沸腾气泡的频率同步时，振动材料会增强 BHT。