本研究將熱虹管系統結合建築外牆，利用熱虹管系統將外牆所收集到的太陽熱能加熱熱虹管中的工作流體，將熱量回收利用。本研究藉由實驗探討直立式太陽能熱水系統在不同的冷卻型態作用時，觀察不同冷卻型態對於整體系統的熱傳性能影響。
實驗模型中，外牆部分以長80公分，寬為40公分，厚度為0.16公分之鋁合金板模擬，結合同尺寸功率為800W/m^2之加熱片。矩形熱虹管為長70公分，寬20公分，截面邊長3公分，厚度為0.12公分之正方形鋁合金管。模型系統冷卻端有30公分及45公分兩種長度的冷卻水套管，並可以使用熱虹管內的沉水馬達控制管內對流模式。
本實驗使用兩種不同長度的冷卻水套管，並搭配不同溫度的冷卻水，在自然對流模式以及混合對流模式兩種模式作用下，以加熱片供應不同瓦數之熱量以模擬太陽日照，並觀察熱虹管系統內部工作流體流速、工作流體熱通量及冷卻端熱通量，並做系統熱傳性能分析。
實驗結果顯示，在使用混合對流模式下，熱虹管內工作流體流速將會大幅提升、可以增高工作流體熱通量，並能有效提高熱傳效率。使用30公分冷卻水套管時，冷卻端可以有較大的熱通量，且因模型設計緣故，30公分冷卻水套管之位能差較大，導致熱虹管中的工作流體流速也較快，使工作流體熱通量上升，能提升熱傳效果，並且在使用20℃冷卻水時，系統有較好的熱傳效果。但在低瓦數、低溫冷卻水和混合對流模式下，工作流體形成紊流且熱量供給較少，導致實驗測點所得數據在計算後，工作流體流速易有放大的現象。熱傳效果由強至弱依序為，混合對流模式使用30公分冷卻水套管、自然對流模式使用30公分冷卻水套管、混合對流模式使用45公分冷卻水套管、自然對流模式使用45公分冷卻水套管。

This research combines thermosyphon loops with building walls, and collects solar heat from building walls to heating working fluid in the thermosyphon loops. The heated working fluid can be used for other purposes to increase energy usage. The study explore the effects of the cooling section on the heat transfer performance of wall solar-water heating by experiments.
The experimental results show that in the mixed convection mode, the flow rate of the working fluid in the thermosyphon loops will be greatly improved, and the heat transfer efficiency will also be effectively increased. Because of the model design, the big potential difference of the 30 cm cooling system caused a faster flow rate of the working fluid in the hermosyphon loops, and improved the heat transfer effect. Also, in 20 °C cooling water, the system will have better heat transfer effect. However, in the low wattage, low-temperature cooling water and mixed convection mode, the working fluid becames turbulence and supplied less heat, which led to the phenomenon that the flow rate of the working fluid is easily amplified after the calculation of the data obtained from the experimental points. The heat transfer results from strong to weak are : the mixed convection mode with a 30 cm cooling system, the natural convection mode with a 30 cm cooling system, the mixed convection mode with a 45 cm cooling system, and the natural convection mode with a 45 cm cooling system.

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