团队博士秦思宇关于三维热虹吸管散热器传热特性的实验研究发表于最具期刊Applied Thermal Engineering。

Dr. Siyu Qin published a research paper about the experimental study on the thermal characteristics of a three-dimensional thermosyphon heat sink in the journal of “Applied Thermal Engineering”.

先进电子器件如5G无线通信系统的集成芯片和绝缘双极型晶体管(IGBT)等的热解决方案不断受到更快处理器速度和更高集成度的挑战。电子元件在高温下的使用时间越长，其使用寿命和工作效率就越低。因此，有必要控制热管理系统的工作温度，提高电子元件的能量利用率。相变传热在电子设备的热管理中受到广泛关注，本研究将蒸汽腔、热虹吸管和折叠翅片集成在一起，制造了用于结构改进的三维热虹吸管(3D-TS)，将相变传热从二维模式扩展到三维模式。3D-TS由平板蒸汽腔和相互连接的垂直热虹吸管组成，实现了三维换热，有助于促进汽化潜热的释放；而垂直热虹吸管上的折叠翅片增加了风冷的散热面积。在实验研究的基础上，分别讨论了加热功率和风量对3D-TS热工性能的影响。通过对温度分布和热阻变化的分析，揭示了空气强迫对流与三维相变换热的耦合特性，研究结果拟为热管理领域高效复合散热器的研制提供参考。

The thermal solution to advanced electronic devices, e.g., integrated chips of 5G wireless communication systems and insulated gate bipolar transistor (IGBT) modules, is continuously challenged by the increase in their faster processor speeds and higher levels of integration. The service life and working efficiency of densely packed electronic components will decrease with prolonged use at high temperatures. Consequently, it is necessary to control the operating temperature and improve the energy utilization for the thermal management system. Phase change heat transfer has received extensive attention in the thermal management of electronic devices. Accordingly, by integrating the vapor chamber, thermosyphon and folded fins, a three-dimensional thermosyphon (3D-TS) for the structural improvement was fabricated, which extended the phase change heat transfer from two-dimensional mode to the three-dimensional mode in this paper. The 3D-TS consists of a flat vapor chamber and interconnected vertical thermosyphon tubes, which achieves the three-dimensional heat transfer and helps to promote the release of latent heat of vaporization. Folded fins attached to the vertical thermosyphon tubes act to increase the heat dissipation area of air-cooling. Based on the experimental study, the effects of the heating power and air volume flow rate on the thermal performance of the proposed 3D-TS were respectively discussed. The coupling characteristics of the air forced convection and the three-dimensional phase change heat transfer were revealed by analyzing the variation of the temperature distribution and the thermal resistance. It is expected that the findings may provide a reference for the development of efficient composite heat sinks in the field of thermal management.

文章链接：http://doi.org/10.1016/j.applthermaleng.2023.120193