热管中添加纳米颗粒

EXPERIMENTAL STUDY ON THERMOSIPHONBY ADDING NANOPARTICLES TO WORKING FLUID

随着纳米技术的飞速发展 ,研究者逐渐把这一高新技术应用于热能动力这一传统领域 .提出了一种新的提高传热的方法———在以水为工作液体的两相闭式热虹吸管中添加一定数量的纳米颗粒 .在理论和实验中研究了这种热虹吸管蒸发段的工作特性 ,结果表明 ,在实验范围内 ,与普通热管相比较 ,这种新式热管具有很好的启动特性 ,低的管壁温度 ,传热系数提高了 4 7%～ 96 % ,轴相热流率提高了 7 6 %～ 15 % .这种新的方法简单而且容易应用于化工生产中 .

A new method of enhancing heat transfer of the heating section of a two-phase closed thermosiphon was proposed. Theoretical and experimental studies were carried out on the performance of heat transfer enhancement by adding a proper amount of nanoparticles to the thermosiphon with water as working fluid. This thermosiphon showed such advantages as good startup, lower tube wall temperature, increased heat transfer coefficient by 47%-96%, and increased heat flux by 7.6%-15% in the range of the experiment. This method is simple and easy to use in chemical industry.