平板型双毛细芯蒸发器环路热管的实验研究

发布时间：2018-05-27 22:28

本文选题：环路热管 + 平板式　；参考：《华中科技大学》2015年硕士论文

【摘要】：伴随着电子科学技术的迅速发展以及电路集成的密度不断的提高,因此电子元件的散热问题也越来越多的受到重视。散热翅片,风扇等一系列辅助部件的加入使传统单相流体的对流散热技术在电子器件的散热过程中表现出较差的紧凑性、可靠性和较低的传热效率。相对于此,利用液体工质的蒸发和冷凝从而实现热量传递的环路热管(1oop heat pipe,LHP)技术表现出传热能力强、结构紧凑、传输距离远、反重力能力强、安装布局方便、有被动控温能力也可以实现主动控温等一系列的优点。LHP因此在航天航空等领域的热管理方面和高热流密度电子元器件的散热等方面得到了越来越广泛的关注以及应用[1-5]。环路热管(LHP)是一种靠蒸发器内毛细芯产生的毛细抽吸力驱动回路的运行,利用工质的相变来进行热量传递的高效传热装置。环路热管的蒸发器结构有圆管式和平板式两种,平板式蒸发器的优点是易于和散热面贴合,传热的热阻小以及温度均匀性好。本论文首先论述了环路热管技术研究的热点以及国内外研究现状,对环路热管有了总体的认识,然后介绍了环路热管的工作原理和组成部分,设计了平板型双毛细芯蒸发器环路热管系统,并针对所设计的系统搭建了实验平台,对其进行了启动和变工况特性研究,考虑了不同因素如充灌率、重力倾角等对系统性能的影响,通过对实验结果的分析我们发现:平板型LHP的双毛细芯蒸发器可以提高系统的热传输能力,减小侧壁导热对补偿腔的影响,降低系统的运行温度,改善和提高系统的运行性能。
[Abstract]:With the rapid development of electronic science and technology and the increasing density of circuit integration, more and more attention has been paid to the heat dissipation of electronic components. With the addition of a series of auxiliary parts, such as fin, fan and so on, the convection heat transfer technology of the traditional single-phase fluid shows less compactness, reliability and low heat transfer efficiency in the heat dissipation process of electronic devices. Compared with this, the loop heat pipe (1oop heat pipe-LHP), which uses evaporation and condensation of liquid working fluid to realize heat transfer, shows strong heat transfer ability, compact structure, long transmission distance, strong anti-gravity ability and convenient installation and layout. There are a series of advantages such as passive temperature control and active temperature control. LHP has been paid more and more attention in the field of thermal management and heat dissipation of electronic components with high heat flux in aerospace and other fields, and has been widely used in [1-5]. Loop heat pipe (LHP) is an efficient heat transfer device which uses the phase change of working fluid to transfer heat through the operation of capillary suction drive loop produced by capillary core in evaporator. The evaporator structure of the loop heat pipe has two types of circular tube type and plate type. The advantages of the flat evaporator are that it is easy to fit with the heat dissipation surface, the heat transfer resistance is small and the temperature uniformity is good. This paper first discusses the hot spot of loop heat pipe technology research and the current research situation at home and abroad, has a general understanding of loop heat pipe, and then introduces the working principle and components of loop heat pipe. The loop heat pipe system of flat type double capillary evaporator is designed, and the experimental platform is built for the designed system. The characteristics of start-up and variable working conditions are studied, and different factors such as filling rate are considered. Through the analysis of the experimental results, we find that the double-capillary core evaporator of flat LHP can improve the heat transfer ability of the system and reduce the influence of the side wall heat conduction on the compensation cavity. Reduce the operating temperature of the system, improve and improve the performance of the system.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN603

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