本文主旨在於設計並製造出一具有平板式蒸發器之迴路式熱管，且使用半透明之高壓軟管替代銅管，以方便觀察工作流體於管內的所發生之現象。在平板式迴路式熱管製造完成後，將以實驗的方式討論以水為工作流體之平板式迴路式熱管的熱傳性能，並由實驗中觀察系統之操作特性、啟動特性、熱阻等現象，經性能測試後得知系統於垂直狀態注水量22cc熱負載70W操作時，操作溫度90.3℃，熱阻為0.384℃/W。

In this study, a two-phase closed loop cooling system aimed to be used in electronic system is designed and tested. The cooling system consists of a flat evaporator with wick structure inside, a tube-and-fin condenser, and two connecting tubes between evaporator and condenser. The connecting tubes are transparent silicon tubes which can be used for flow pattern observation. Water is used as the working fluid. The cooling system is charactered by a parametric study which determined the effect of charging capacity, the tilt angle of the system on the thermal performance of the closed loop. Experimental data show that the system has optimal performance under vertical operating condition with 22cc water charging capacity. The thermal resistance of the system is around 0.384℃/W under this configuration.

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