癸酸/辛酸-纳米复合相变材料的热物性实验研究  

Experimental Research on Thermophysical Properties of Capric/Caprylic Acid Nanocomposite Phase Change Material

作　　者：陈裕丰 章学来[1] 丁锦宏[1] 陈文朴[1] 任迎蕾 Chen Yufeng Zhang Xuelai Ding Jinhong Chen Wenpu Ren Yinglei(Institute of Cool Thermal Storage Technology, Shanghai Maritime University, Shanghai,201306, China)

机构地区：[1]上海海事大学蓄冷技术研究所,上海201306

出　　处：《制冷学报》2017年第5期41-45,共5页Journal of Refrigeration

基　　金："十二五"农村领域国家科技支撑计划(2013BAD19B01)资助项目;上海市科委(16040501600);上海海事大学创新基金(YXR2016094)项目资助~~

摘　　要：针对脂肪酸有机物癸酸/辛酸(质量比30∶70)复合相变材料存在导热系数低的缺点,本文分别按不同比例添加10~30nm的纳米铜粉、纳米氧化铝和纳米氧化铁制备出癸酸/辛酸纳米复合相变材料。结果表明:添加了质量分数为0.1%~0.4%的纳米材料后,复合相变材料具有良好的热稳定性,未出现沉淀现象;导热系数与原基液相比有大幅度提高,依次提高5.1%~6.5%、4.0%~12.4%、6.7%~17.5%,相变温度点波动范围小(±0.39℃),相变潜热变化不大,提高幅度为2.2%~5.5%,因此选择加入适当适量的纳米材料可改善原相变材料的热物性。To increase the thermal conductivity of organic fatty phase change materials （PCMs）, different mass fractions of nanoparticles with high thermal conductivity, including 10-30 nm copper powder, alumina, and iron oxide, were individually added to composite PCMs of capric/caprylic acid （with a 30：70 mass ratio）. The experimental results show that the composite PCMs exhibit good thermal stability and zero precipitation after the addition of nanoparticles at a mass fraction of 0.1%-0.4%. Compared with the original material, the thermal conductivity is greatly improved by 5.1% -6.5%, 4.0% -12.4%, 6.7% -17.5%, for the copper powder, alumina, and iron oxide, respectively. The fluctuation range of the phase change temperature is small （ ± 0.39 ℃ ）. The phase change latent heat varies little and the increase range is 2.2% -5.5%. Therefore, the selection of appropriate amounts of nanomaterials can improve the thermal properties of the original PCMs, which may have wide potential application.

关 键 词：复合相变材料 热物性 纳米材料 

分 类 号：TB34[一般工业技术—材料科学与工程] TK02[动力工程及工程热物理]