Newsletter 高速鐵路簡訊 . 交通部高速鐵路工程局
機場捷運隧道通風(排煙)系統簡介 Introduction to the TIAA MRT Tunnel Ventilation Fan (Exhaust) System
隧道風機(TVF):設置於地下車站兩端(月台或穿堂層)及隧道通風豎井(過河段)

機場捷運隧道通風(排煙)系統設置於機場捷運地下隧道段,其主要功能有三:於正常模式下,確保列車正常運轉之環境條件;在塞車模式下,確保列車在隧道內停駛等待時,維持列車空調正常運轉之環境條件;在緊急模式下,確保人員逃生疏散時安全之環境條件。
當列車於地下車站內發生火災時,原正常模式運轉之車站空調/通風系統會配合關閉,僅餘重要機房通風及月台上下排風會配合隧道通風(排煙)模式啟動相關風機;另為避免月台軌道側煙霧蔓延進入站內,車站空調系統送風機及新鮮空氣風機會啟動引入外氣直接對月台層加壓送風,維持站內正壓,防止煙霧蔓延,使人員得以安全逃生。
而當列車於隧道內發生火災時,司機員會立即通報行控中心,由行控中心值班主管決定疏散方案,如需採就地下軌疏散時,為確保人員逃生安全,行控中心會開啟隧道照明,而隧道通風(排煙)系統會配合人員逃生疏散方向,依設定動作模式表啟動相關風機,以產生臨界風速(2.5m/sec,避免煙霧逆流)最大氣流速度(11.2m/sec,避免妨礙人員逃生)間之氣流,供人員逆風由最近車站、通風豎井等逃生,並將濃煙往人員逃生反方向排出,而逃生路徑溫度不可高於60℃,亦不可使煙霧擴散至非事故隧道與鄰近車站軌道區。
另考量隧道內就地下軌疏散人員方式較為困難且危險,故除非列車無法運行且情況已危及車內旅客安全時,行控中心才會採取就地下軌疏散方式,否則原則上將儘量安排事故列車繼續行進至鄰近車站疏散,以利人員得利用站內設施迅速逃生至站外之安全地點。

The TIAA MRT Tunnel Ventilation Fan (Exhaust) System is installed in TIAA MRT underground tunnel sections, which has three main functions: to ensure a safe environmental condition for the train to operate under normal mode; to ensure normal operation of the air conditioning system while the train is suspended inside the tunnel under congestion mode; to ensure a safe environmental condition for personnel evacuation under emergency mode.
When a train fire occurs in an under-ground station, the air conditioning / ventilation system will shut down immediately, leaving only the ventilation and exhaust system of essential equipment rooms and platforms turned on. On the other hand, to avoid platform wayside smoke from spreading into the station, air conditioning systems and fresh air TVF in the station will start to introduce external air directly to the platform to maintain steady and positive pressure in the station and also to prevent further spreading of smoke, which will enable save evacuation.
When a train fire occurs in the tunnel, the driver will immediately inform the operational control center (OCC) and the on-duty supervisor will determine the suitable evacuation method. If the evacuation method is determined to walk onto the track, the OCC will turn on tunnel lighting system and relevant TVF (exhaust) system in accordance to the evacuation direction. The settings of the turned-on fans are based on the operation mode table which will generate critical wind speed (2.5 m/sec, to avoid upstream smoke) to maximum air speed (11.2m/sec, to avoid impeding the evacuation) for personnel to escape under upstream wind to the nearest station, ventilation shafts, etc. and emit smoke to the opposite direction. The temperature of the escape routes should not exceed 60℃, and the smoke should not be spread to the track areas of non-accident tunnels or any adjacent station.
Another consideration regarding detrainment evacuation in tunnel is that this protocol is more difficult and dangerous. Therefore, only when the train is completely inoperative and the situation is endangering passenger safety will this method be triggered by the OCC. In general, the train will continue to operate to the nearest station for evacuation so that onboard personnel can utilize station facilities and implement a safer evacuation.

  • 隧道噴流式風機(JAF):設置於隧道上方,用於導引氣流方向
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