以火災模擬軟體（FDS）模擬抽氣式偵煙探測器（ASD）設計之研究

The Study of Aspirating Smoke Detector System with Fire Dynamics Simulator

本研究透過以計算流體力學為基礎之「火災模擬軟體 （fire dynamicssimulator, FDS）」，模擬抽氣式偵煙探測器 （aspirating smoke detector system,ASD） 應用於挑高大空間。FDS 模擬結果與全尺寸煙霧實驗做分析比對、互相驗證。研究發現以FDS 模擬，發出警報的時間會較早，約10-30 秒。FDS 之模擬結果偏向樂觀，對於防火設計上較為不安全。因此若使用FDS 模擬ASD設計，對於模擬數據之參考需有安全值規劃，方能貼近實際之煙霧實驗。惟此安全值之比率仍需更多實驗的分析與統計。

This study has employed a Fire Dynamics Simulator that is based onFluid Dynamics to simulate the application of Aspirating Smoke DetectorSystem in High-ceiling Spaces. The FDS simulation result has beenanalyzed and compared with Full-Scale Smoke Experiments. Accordingto the study results, the alarm would be set off about 10-30 seconds soonerwhen applying FDS simulation. However, the result of FDS simulationmight be too optimistic to have a secure fire protection planning. Therefore,a safety limit should be set for ASD Design with FDS Simulation for acloser result to the actual smoke experiment. However, the ratio of thesafety limit will still need to be derived from more experimental analysisand statistics.