本研究主要目的為結合水霧噴頭撒水系統與鐵捲門，經由耐火爐加熱實驗測試，分析是否符合CNS 14803規範的阻熱性要求。使用符合CNS 14803規範尺寸(3x3m)的鐵捲門試體，以水霧直噴捲箱與門片，順流到門片下來形成水膜，利用水的高比熱與高潛熱，以冷卻門片溫度，提高阻熱性能。
冷流場實驗結果發現，水霧噴頭與鐵捲門之間的垂直與水平距離會影響水膜在門片覆蓋的完整性。當調整到適當距離後，經由改變抽水泵的壓力值，使水膜完整覆蓋門片後，接著再進行耐火爐加熱實驗。
在耐火爐加熱實驗發現，耐火爐升溫曲線在某時段會超出CNS 14803升溫曲線，在門片溫度測點上，也發現部分測點超過CNS14803規範。鐵捲門在高溫加熱後，產生熱變形，影響其部分水膜覆蓋在門片的完整性，使部分測點溫度出現局部高溫，進而使部分水霧噴入捲箱內，造成捲箱內溫度的跳動。實驗結果證實鐵捲門片只需有水膜覆蓋，就可以控制其表面溫度於100oC左右,符合CNS 14803規範；若再進一步加強鐵捲門的接合強度，減少熱變形產生，本研究利用水霧噴頭撒水系統提高鐵捲門之阻熱性是可行的。

The purpose of this research is to investigate the heat resistance property of a water-film-covered steel roller door by means of a fire test in a standard large scale 3m × 3m door/wall refractory furnace. Based on the CNS 14803 standard, a 3m × 3m specimen was constructed and was sprayed by water mist nozzles to form a water film on the specimen. The water film could absorb a great amount of heat because of the high specific heat and latent heat of water, and thus enhanced the heat resistant performance of the steel roller door.
It has been shown that the vertical distance and horizontal distance of the nozzles to the roller door influenced the water film integrity. By carefully adjusting these distances and the pressure of the water pump, a complete coverage of the water film on the roller door could be achieved. The fire test in the large scale door/wall refractory furnace then followed.
The fire test results showed that the temperature curve of the furnace basically conformed to the CNS 14803 heating curve; but in some time intervals, exceeded the latter. It was found that some of the temperature test points on the right-hand side of the roller door went over the CNS 14803 specified value. The reason was that the steel roller door, during the fire test, exhibited a certain degree of thermal deformation, which affected the integrity of water coverage. Furthermore, due to the thermal deformation, some sprayed water entered the roller box, creating temperature fluctuations. In contrast, the left-hand side of the roller door had full water coverage and the temperature maintained around 100o C. The fire test confirmed that if the roller door has a full water film coverage, the surface temperature can be controlled to fulfill the requirements of the CNS 14803 standard. Furthermore, if the strength of the connecting parts of the steel roller door are improved to reduce thermal deformation, the present method of enhancing the heat resistant property by applying a water film on the steel roller door is feasible.

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