Experimental study of the thermal behaviour of nano-enhanced phase change materials(NPCMs)
Highly conductive particles have been used to improve the inherent thermal conductivity of phase change materials(PCMs).To investigate the heat transfer process of PCMs enhanced by nano-particles,the melting process of 15 kinds of nano-particles PCMs(NPCMs)was observed in test tubes with different nano-particles and particle concentrations.The NPCMs were prepared by dispersing nano-coconut shell charcoal with mass fraction ranged from 0.02 wt%to 18.5 wt.%and nano-graphite with mass fraction from 0.02 wt.%to 1.0 wt.%in paraffin-based PCM with a nominal melting temperature range of 26-28 ℃.Type T thermocouples were used to monitor the temperature variation of each material under different boundary temperatures in a climate chamber.Thermovision tests were conducted to illustrate the temperature distribution.It was found that Nano-particles was able to enhance the heat transfer of PCMs.The addition of nanoparticles within 0.1 wt.%didnt affect the phase change characteristics of paraffin.Dispersant was able to enhance the heat transfer of NPCMs.However,when the concentration increased to 18.5 wt.%,more particles were observed at the bottom of the test tubes,causing heat transfer dead zones.
nano-particles phase change materials (NPCMs) nano-coconut shell charcoal nano-graphite heat transfer
Xiaoqin SUN Yajing MO Youhong CHU Siyuan FAN Changchuan LI Baoshan XIE
Energy and Power Engineering,Changsha University of Science&Technology,Changsha,Hunan 410004,PR China
国际会议
武汉
英文
71-79
2018-08-21（万方平台首次上网日期，不代表论文的发表时间）