摘要
以石蜡为相变材料基体、纳米金属铜、镍、铝、铁和锌为导热增强剂、油酸为分散剂,采用超声波震荡法制备纳米金属/石蜡复合相变蓄热材料体系。通过复合蓄热体系的步冷曲线分析,结果显示纳米铁为有效导热增强剂。对不同质量分数纳米铁/石蜡复合相变蓄热体系进行DSC和导热系数测试分析,结果表明:随着纳米铁质量分数的增加,复合材料的导热系数逐渐增大,相变潜热值逐渐降低,相变温度变化不大;纳米铁质量分数为0.1%时,复合材料的固态导热系数可增大2.8倍,相变潜热值下降1.1%。
Taking paraffin as the matrix of phase change material, nano-copper, nano-nickel, nano-aluminum, nano- iron, nano-zinc as the thermal conductivity enhancer, and oleic acid as the dispersing agent, the ultrasonic oscillation method was used to prepare nano metal- paraffin composite phase change heat storage materials. The gradually cooling curve analysis of the phase change composite heat storage materials was done, the results show that nano-iron is a kind of effective thermal conductivity enhancer. The DSC and thermal conductivity coefficient of composite phase change heat storage systems with different nano iron/paraffin mass fraction were tested and analyzed. The results show that with the increase of nano-iron particles mass fraction, the thermal conductivity coefficient of composite material increases gradually, the phase change latent heat value gradually reduces, and phase transition temperature changes little. When the mass fraction of nano-iron is 0.1%, the solid thermal conductivity coefficient of the composite material will increase by 2.8 times, phase change latent heat value drop by 1.1%.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2017年第6期1723-1728,共6页
Acta Energiae Solaris Sinica
基金
上海市教委重点项目(12ZZ154)
上海海事大学研究生创新基金(SMU201405)
关键词
石蜡
纳米材料
相变材料
储能技术
paraffin
nanomaterials
phase change materials
energy storage technology
