本文以數值模擬與實驗量測互補方式，探討方形容器內充填相變化材料微膠囊，在等溫加熱過程中其熱能儲存變化與特性。方形容器之物理邊界條件其左右邊界分別為等溫熱壁與等溫冷壁，而上下壁面皆為絕熱壁。容器內緊密堆積的膠囊間隙的介質為空氣，膠囊內相變化材料為十八烷。本文實驗共考慮五組不同冷熱壁溫度組合如下所示：(44℃/24℃、40℃/24℃、36℃/24℃、40℃/22℃、40℃/20℃)，其相關物理參數及範圍分別如下：史蒂芬數：Ste = 0.063 ~ 0.251 次冷參數：Sb = 0 ~ 0.75 。此外，針對所探討的實驗模型建構對應之數學模式，並進行相對應實驗條件之數值模擬，分析容器內微膠囊相變化材料熔解過程，進而探討其熱能儲存量及速率。

The present study aims to examine, via a complementary approach of experimental measurement and numerical simulation, thermal energy storage characteristics in a vertical square enclosure of air packed with microencapsulated phase change material. The core phase change material in the microcapsules is n-octadecane. The enclosure is differentially heated by the two vertical isothermal surfaces, while the other surfaces are considered thermally insulated. Thermal energy storage experiments have been undertaken for five sets of the hot and cold surface temperatures imposed across the enclosure as follows: (44°C/24°C, 40°C/24°C, 36°C/24°C, 40°C/22°C, 40 °C/20°C), with the corresponding dimensionless parameters in the following ranges: the Stefan number, Stem = 0.063 ~ 0.251 and the subcooling parameter, Sbc = 0 ~ 0.75. Meanwhile, numerical simulations have been performed based on a mathematical modeling mimicking the experimental
configuration considered to further elucidate the relevant heat transfer characteristics as well as the thermal energy storage efficiency of the enclosure.

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