Measurement and Analysis of Thermophysical Properties of a Mixture of Phase-Change-Material Particles and Nanofluid

• Main Authors: Yu-Han Lu, 呂育翰
• Other Authors: Ching-Jenq Ho
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/85067626097097659314

碩士 === 國立成功大學 === 機械工程學系碩博士班 === 94 === In the present study, a mixture of PCM (Phase Change Material) suspension, emulsified from n-hexadecane, water, and surfactant, and a nanofluid of water dispersed with aluminum oxide nanoparticles has been prepared. Thermophysical properties of the resulting suspension of PCM particles/alumina nanoparticles, such as density, pH value, viscosity, particle size, melting/freezing points, and effective thermal conductivity, are then investigated experimentally. The PCM suspension prepared displays significant degree of supercooling, in particular for the lower volumetric fractions. Addition of 1 wt% aluminum oxide nanoparticles to the PCM suspension was found to result in a marked increase in the density, viscosity, and particle size of the mixture; while the effective thermal conductivity as well as the melting/freezing points of PCM particles remain somewhat unaffected.