纳米金属粒子强化正十八烷相变传热性能的实验研究  

Experimental Research on Performance of Metal Nano-particle Enhancing Octadecane Phase-change Heat Transfer

作　　者：周艳[1] 张金辉[1] 王艳[1] 路海滨[1] 李庆领[1] 

机构地区：[1]青岛科技大学机电工程学院,青岛266061

出　　处：《材料导报》2013年第12期8-11,共4页Materials Reports

基　　金：国家自然科学基金(51176080);山东省自然科学基金(ZR2012EEL17)

摘　　要：对正十八烷中分别添加纳米Cu粒子、纳米Al粒子及纳米Fe2O3粒子的复合相变材料的传热性能进行了实验研究。采用热针法分别对正十八烷及其与纳米金属粒子的复合相变材料的固态体系、液态体系的导热系数进行了实验研究,结果表明:在正十八烷中添加纳米金属粒子后,纳米金属粒子/正十八烷复合相变材料固、液态体系的导热系数随着纳米金属粒子质量分数的增加而显著提高,且纳米Al粒子/正十八烷复合相变材料导热系数的提高较其他两者更为明显。采用DSC对正十八烷及添加了不同质量分数的纳米金属粒子/正十八烷复合相变材料的相变潜热及相变温度进行了实验研究,结果表明:纳米金属粒子/正十八烷复合相变材料的相变潜热比纯正十八烷材料略低,且随纳米金属粒子质量分数的增大逐渐减小,但其相变温度变化不大。The heat transfer performance of the PCMs was tested. The PCMs were separately made by mixing octadecane with copper nano-particles, aluminum nano-particles and iron oxide nano-particles. Experiments were carried out to research on the thermal conductivity of liquid-solid system using thermal stitch, both to octadecane and its composite phase change materials with metal nano-particles. The results showed that the thermal conductivity of liquid-solid system was significantly increased with nano-particle mass fraction and the thermal conductivity of octadecane/Al-nanoparticles composite phase was more pronounced than the others. The change latent heat and transition temperature of octadecane and PCMs, which were made adding different mass fraction of nano-particles to octadecane, were tested bY DSC. The results showed that the phase change latent heat of PCMs was slightly lower than pure octadeeane materials and was decreased with the increasing of mass fraction of metal nano-particles. But the changes of phase transition temperature were minor.

关 键 词：正十八烷 纳米粒子 导热系数 相变潜热 

分 类 号：TK124[动力工程及工程热物理—工程热物理]