本論文採用實驗量測與數值模擬的互補方式，針對水中離散相變化材料微膠囊或與奈米微粒所成懸浮流體，探討其流經一局部等通量加熱水平圓管之熱發展層流強制對流熱傳特性。實驗所用的銅管總長度為 1300 mm，外內徑分別為 4.0 mm 與3.4 mm。本文所調製之懸浮流體其內涵相變化材料(二十烷)微膠囊與奈米微粒(氧化鋁)之質量濃度分別為 與 。懸浮液於圓管入口溫度控制約33℃，此溫度接近且低於實驗所用之相變化材料二十烷之熔點36.4℃。藉由實驗量測與數值模擬所得的外管壁溫度結果發現：外管壁溫度隨著懸浮液內含相變化微膠囊濃度增加而顯著降低；然而，若另添加奈米顆粒於懸浮流體時，僅呈進一步些微下降。

Thermally developing laminar forced convection heat transfer characteristics of water-based suspension flow containing a microencapsulated phase change material
(n-eicosane) without/with alumina nanoparticles through a horizontal tube partially heated with constant heat flux have been investigated experimentally and numerically. The total length, outer and inner diameters of the tube used in the experiment is 1300mm, 4.0mm and 3.4mm, respectively. The water-based suspension containing 0~10 wt.% of phase change material was formulated without/with 1 wt.% of alumina nanoparticles. The inlet temperature of the water-based suspension was always controlled near 33C, which is near and below the melting point of n-eicosane used in the experiment. The results from the numerical simulations and experimental measurements show that the outer wall temperature rise over the partially-heated tube can be markedly suppressed with increasing mass fraction of PCM in the suspension without dispersing the alumina nanoparticles; while becomes further reduced slightly with dispersing 1 wt.% of nanoparticles in the phase change material suspension.

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