Measurement and Analysis of Pertinent Thermo-PhysicalProperties of Phase-Change-Material Suspensions

• Main Authors: Shr-Chi Chen, 陳士琦
• Other Authors: Ching-Jenq Ho
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/22804876644234715120

碩士 === 國立成功大學 === 機械工程學系碩博士班 === 91 === The present study performs an experimental study is mainly concerning pertinent thermophysical properties of solid-liquid phase change material (PCM) suspensions, Including the PCM particle size ; viscosity, melting/freezing points, degree of supercooling, and latent heat of fusion of the PCM suspensions. The PCM considered in the experiment includes n-Tetradecane, n-Octadecane, and n-Eicosane. The suspension viscosity is found to be greatly increased with the concentration of PCM, depending on whether the PCM particles exist in the suspension as solid or liquid phase. Significant degree of supercooling has been detected in the PCM suspension considered, showing a great bearing with the particle sizes. The increase of particle size tends to suppress markedly the degree of supercooling in the suspension. In addition, attempts have been undertaken to generate nanoparticles of a low-melting-point metal, Gallium, by means of a laser ablation technique. Results clearly demonstrate that the size and configuration of the Gallium nanoparticles generated can be controlled effectively by the power of pulse laser imposed a well as the concentration of surfactant introduced.