纳米颗粒强化热虹吸管传热特性的实验研究  

Experimental Study of the Intensified Heat Transfer Characteristics of a Thermosiphon Through the Addition of Nanoparticles

作　　者：彭玉辉[1] 黄素逸[1] 黄锟剑 

机构地区：[1]华中科技大学能源与动力工程学院,湖南武汉430074 [2]湖南省高效热交换技术及设备重点实验室,湖北长沙410000

出　　处：《热能动力工程》2005年第2期138-141,共4页Journal of Engineering for Thermal Energy and Power

基　　金：国家重点基础研究发展规划(973)基金资助项目(G2000026303)

摘　　要：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领域。提出了在热虹吸管里面添加纳米颗粒。从理论和实验研究了这种热虹吸管蒸发段的工作特性,结果表明,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,换热系数提高了47%～96%,轴相热流率提高了7.6%～15%,其换热性能随纳米颗粒粒径的减小而提高,随纳米颗粒加入量有所增加,当超过一定量时换热性能反而降低了。这种新的方法简单而且容易应用于工业技术中。With the rapid development of nanometer technology some research workers have gradually applied this high and new technology to the traditional realm of thermal energy and power. The authors have from a theoretical and experimental viewpoint studied the working characteristics of the evaporation section of a thermosiphon, to which nanoparticles have been added. The results of the study indicate that as compared with conventional heat pipes this type of innovative heat pipes features excellent start-up characteristics and low pipe-wall temperature with heat exchange factor being enhanced by 47%-96% and axial heat flux rate by 7.6%-15%. In addition, their heat exchange performance will increase with the decrease in nanoparticle diameter, and will slightly increase with the addition of nanoparticles. However, when the added nanoparticles have exceeded a certain amount, the heat exchange performance will on the contrary experience a degradation. This innovative method can be applied in industrial units easily and simply.

关 键 词：纳米流体 纳米颗粒 强化传热 热虹吸管 

分 类 号：TK124[动力工程及工程热物理—工程热物理]