本研究主題為一般居室常見流場(冷氣房或室內吊扇)對探測器與撒水頭作動時間之影響。首先針對探測器與撒水頭作動原理之差異造成作動時間不同開始探討，接著利用實尺寸實驗與FDS模擬軟體探討分離式冷氣空調氣流對探測器、撒水頭作動時間之影響，最後是探測器與撒水頭受實際空間障礙物(吊扇)擺設影響之探討。
實驗結果顯示探測器與撒水頭的作動條件，主要與設置位置及火源的距離有關，距離火源越近即越早作動，同時也發現光電式探測器較敏感且容易作動，酒精玻璃球式撒水頭也比金屬熔絲式撒水頭容易作動，另外，空調與吊扇氣流確實會影響偵測器與撒水頭之作動時間，其中吊扇推動的氣流延遲探測器與撒水頭作動時間較為明顯；而比較實尺寸實驗與模擬軟體FDS結果，發現定性上模擬結果與實驗結果相同。

This thesis is focused on the effects of frequently-found room flows (air-condition vent flow or ceiling fan flow) on the detector and sprinkler actuation time. First, we studied the actuation time based on the different action principle of the detector and sprinkler. Then, we use full scale experiments and simulation software FDS to explore the influence of air-condition flow on detector and sprinkler actuation time. Finally, we studied the detector and sprinkler actuation time as affected by the ceiling fan.
The study results show that the detector and sprinkler actuation conditions are affected by the distance to the fire location. If a detector is closer to the fire, sooner will the actuation be. At the same time, we find that smoke detectors are easier to actuate than heat detectors and glass-bulb sprinklers are easier to actuate than fusible-alloy sprinklers. The air-condition vent and ceiling fan definitely affect the detector and sprinkler actuation time. The effects from the ceiling fan was more profound than those from the air-condition flow. Finally, comparison between the results of full size experiments and FDS show similar trends of actuation time.

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