基于混合工质小型环路热管的实验研究

• 作 者: 张先锋 汪双凤 霍杰鹏 李选友
• 机 构: 华南理工大学强化传热与过程节能教育部重点实验室,山东省科学院工业节能研究中心,
• 出 处: 工程热物理学报
• 发表日期: 2011年12期
• 关键词: loop heat pipe binary mixture start-up characteristics thermal transport perform

为满足高寒地区和机载设备中电子设备对散热装置较宽工作温度的要求,本文提出采用乙醇-水混合物作为环路热管的工质,开展了乙醇浓度对环路热管启动特性和热输运性能影响的研究。实验表明:基于乙醇-水混合工质的环路热管能在低功率下启动,随着工质中乙醇浓度的减小,最小启动功率、启动温度升高,启动性能变差;使用混合工质可以改善环路热管的热输运性能,降低系统热阻,提高最大热负荷。

In order to meet the requirements of the electronic devices in the alpine region and airborne equipment for the wide operating temperature of the heat-dissipating device, this paper proposes the use of ethanol-water mixture as the working medium of the loop heat pipe, and conducts the ethanol concentration on the loop heat pipe start characteristics and heat transport Research on the impact of performance. The experimental results show that the loop heat pipe based on ethanol-water mixture can be started at low power. With the decrease of ethanol concentration in working fluid, the minimum starting power and starting temperature increase and the starting performance deteriorates. Can improve the loop heat pipe heat transport performance, reduce system thermal resistance, increase the maximum heat load.