| 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10~30 nm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。实验结果表明：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。热物性参数方面，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%，因此选择适当适量的纳米材料可改善了原相变材料的热物性，具有一定的研究意义。 |
| 关键词: 复合相变材料 热物性 纳米材料 |
| DOI： |
| 投稿时间：2016-11-12
|
| 基金项目:“十二五”农村领域国家科技支撑计划（2013BAD19B01）资助项目。 |
|
| Experimental Research on Thermophysical Properties of Capric/Caprylic Acid Nanocomposite Phase Change Material |
|
Chen Yufeng, Zhang Xuelai, Ding Jinhong, Chen Wenpu, Ren Yinglei
|
| (Institute of Cool Thermal Storage Technology, Shanghai Maritime University) |
| Abstract: |
| To increase the thermal conductivity of organic fatty phase change material (PCM), 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. |
| Key words: composite phase change materials thermal properties nanomaterials |
