Fabrication of a novel nano phase change material emulsion with low supercooling and enhanced thermal conductivity

RENEWABLE ENERGY

卷:151

Article

Zhang, Guanhua¹  Yu, Zhenjie¹  Cui, Guomin¹  Dou, Binlin¹  Lu, Wei¹  Yan, Xiaoyu² 

[1] Univ Shanghai Sci & Technol, Sch Energy & Power Engn, Shanghai 200093, Peoples R China

[2] Univ Exeter, Environm & Sustainabil Inst, Pentyn TR10 9FE, Cornwall, England

关键词: Nanoemulsion;    Phase change materials;    Supercooling;    Characterization;    Thermal properties;   

DOI  :  10.1016/j.renene.2019.11.044

来源: Elsevier

【 摘 要 】

A novel nano phase change material emulsion (NPCE) with low supercooling and high thermal conductivity was prepared by sonication method. N-octadecane was employed as phase change material, multi-walled carbon nanotubes (MWCNT5) were utilised as high thermal conductivity material, and octadecanol was utilised as nucleating agent. The characterization and thermal properties of the nanoemulsions prepared with various concentrations of MWCNT5 and octadecanol were measured and analysed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), particle size analyser, differential scanning calorimeter (DSC) and thermal conductivity meter. The results indicated that the nanoemulsions prepared had great stability, low supercooling and enhanced thermal conductivity. The thermal conductivity was enhanced by 4.32% for 10 wt% nanoemulsion with addition of 1 wt% MWCNTs. The supercooling degree of 20 wt% nanoemulsion was decreased by 36.4% from 173 degrees C to 11.0 degrees C with addition of 1 wt% octadecanol. It can be concluded that the nanoemulsions prepared were able to be utilised as heat transfer and energy storage fluids, with great potential in thermal system applications. (C) 2019 Elsevier Ltd. All rights reserved.

【 授权许可】

Free