本研究係先利用十六烷、水及界面活性劑調製成內含相變化材料(Phase Change Material, PCM)微粒懸浮乳液，另以氧化鋁奈米顆粒與水調配成所謂奈米流體，進而將兩者混合製成PCM微粒/氧化鋁奈米顆粒混合懸浮液。並針對所調配不同濃度比例之PCM微粒/氧化鋁奈米顆粒混合懸浮液之相關熱物理性質，諸如密度、pH值、黏度、粒徑、熔點、凝固點及熱傳導係數等進行實驗量測探討。實驗結果，PCM微粒懸浮乳液呈現過冷相現象，且隨PCM微粒濃度降低越顯著。此外，PCM微粒懸浮乳液之熱物性質受到濃度與溫度之影響。添加體積濃度 Cv = 1%氧化鋁奈米顆粒之奈米流體於不同濃度PCM微粒懸浮乳液而成之混合懸浮液，其密度與黏度皆有顯著上升；惟未導致其熱傳導係數或內含PCM微粒之熔點與凝固點有所變異。

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.

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