Suppression of supercooling of PCM-water emulsions using nano-additives

作     者：ZHANG Xiyao NIU Jianlei WU Jianyong ZHANG Shuo ZHANG Xiyao;NIU Jianlei;WU Jianyong;ZHANG Shuo

作者机构：Department of Building Service EngineeringThe Hong Kong Polytechnic University Department of Applied Biology & Chemical TechnologyThe Hong Kong Polytechnic University 

出 版 物：《储能科学与技术》 (Energy Storage Science and Technology)

年 卷 期：2014年第3卷第2期

页      面：133-136页

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Supported by the Research Grant Council of the Hong Kong SAR government(GRF PolyU 5241/11E) 

主　　题：TES PCM emulsion supercooling MWCNTs nucleating agent 

摘      要：This study aims to develop a paraffin-based phase change material(PCM) emulsion with a low extent of supercooling for thermal energy storage(TES) systems to improve the cooling ***-water emulsions were prepared and characterized. Multi-wall carbon nanotubes(MWCNTs) were dispersed in the emulsion as a nucleating agent to reduce the supercooling. The MWCNTs were chemically modified with carboxyl groups to improve the dispersion of the tubular particles in the organic liquid. Thermal analyses of the emulsions by differential scanning calorimeter(DSC) indicated that the extent of supercooling was significantly reduced. The concentration of the nucleating agent for an effective supercooling suppression as found to be very low, in agreement with previous findings, and there appeared to be a minimum concentration for the supercooling reduction.