碳纳米管纳米流体对液冷式CPU换热性能的改善  

Improvement of Heat Transfer Properties of Liquid-Cooled Entral Processing Unit by Nanofluids Containing Multi-Walled Carbon Nanotubes

作　　者：郑周[1,2] 叶晓江[1,3] 侯志坚[2] 张艺雪[1] 郑星文 陈飞[1,2] 

机构地区：[1]武汉工程大学理学院,湖北武汉430205 [2]深圳职业技术学院机电学院,广东深圳518055 [3]华中科技大学材料科学与工程学院,湖北武汉430074

出　　处：《武汉工程大学学报》2016年第6期594-598,共5页Journal of Wuhan Institute of Technology

基　　金：武汉工程大学第七届研究生教育创新基金(CX2015091)

摘　　要：针对液冷式CPU(central processing unit)散热器散热效果差的问题,设计了液冷式CPU散热器的换热性能实验系统.该实验系统使用基液丙二醇-水,Al_2O_3纳米流体和多壁碳纳米管(MWCNTs)纳米流体进行换热实验,采用单变量法对实验条件进行控制.当加热功率为18.26 W时,基液丙二醇-水的热阻值为0.859℃/W,质量分数0.135%的Al2O3纳米流体的热阻值为0.751℃/W,质量分数0.135%的多壁碳纳米管纳米流体的热阻值为0.739℃/W,质量分数0.32%的MWCNTs纳米流体的热阻值为0.457℃/W.结果表明:在基液中添加纳米粒子能提高基液的换热能力,MWCNTs纳米流体的换热效果随着质量分数的增加而增强.Aiming at the problem of poor heat dissipation in the liquid-cooled central processing unit（CPU） radiator, we designed the heat transfer performance experiment system in the liquid-cooled CPU radiator, by using propylene glycol-water based fluid, and nanofluids containing alumina and multi-walled carbon nanotubes （MWCNTs） to conduct heat transfer experiment, and we optimized the experimental conditions through the single variable method. When the heating power is 18.26 W, the thermal resistance of propylene glycol-water fluid, alumina nanofluids with mass fraction of 0.135%, and MWCNTs nanofluids with mass fraction of 0.135% and 0.32% were 0.859 ℃/W, 0.751 ℃/W, 0.739 ℃/W and 0.457 ℃/W, respectively. The results show that the heat transfer capability of the based fluid improves by adding nanoparticles, and the heat transfer effect of MWCNTs nanofluids enhances with the mass fraction increasing.

关 键 词：碳纳米管流体 液冷CPU 换热性能 热阻 

分 类 号：TB383[一般工业技术—材料科学与工程]