升降横移式地下机械立体车库汽车火灾排烟量计算
Smoke extraction rate calculation of underground lift-sliding stereo mechanical garages
摘要：
分析了地下机械立体车库的火灾危险性，并基于升降横移式机械立体车库空间结构特征建立了与排烟量相适应的窗口羽流计算模型。运用火灾动力学软件（FDS）建立了地下立体车库模型，并对窗口羽流法和换气次数法分别计算出的排烟效率进行了对比分析。结果表明：着火停车单元内的火灾发展受排烟量影响较小；对于移送车通道空间内能见度、烟气温度以及车库内的CO浓度，窗口羽流计算法的模拟结果均优于换气次数法，可以为消防救援人员提供更高的安全保障。
Abstract：
Analyses the fire risk of underground stereo mechanical garage. Based on the spatial structure characteristics of lift-sliding stereo mechanical garage, establishes a window plume calculation model suitable for the smoke extraction rate. Using fire dynamics simulation, establishes a model of the underground stereo garage, and analyses the smoke extraction efficiencies calculated by the window plume method and the air change rate method, respectively. The results show that the fire development in the fired park unit is less affected by the smoke extraction rate. And the results of other indicators such as the visibility and the gas temperature in the car transfer channel and the CO concentration in the garage under the same fire conditions using window plume simulation are all better than those using air change rate method, which provides a higher safety assurance for firefighters.
Keywords:underground, mechanical garage, smoke extraction rate, window plume, numerical simulation, air change rate