有轨电车地下车辆基地自然排烟方案研究

Research on smoke exhaust scheme of the underground tram vehicle base

依据性能化设计理念,对南京河西有轨电车地下车辆基地的排烟方案进行设计。分析自然排烟方案,针对排烟竖井开口尺寸、竖井高度、隔层高度、侧面补风窗高度、挡烟垂壁长度等5个因素,在FDS中建立相应模型,并通过正交试验测定最佳排烟效率的组合。分析排烟量和烟气从竖井中排出后的高度发现,目标8 MW的火源功率不能满足自然排烟的安全性需求,地下车辆基地最终采用机械排烟方案。

On the basis of performance based design, the smoke extraction scheme of underground vehicle base of Nanjing Hexi has been designed. Natural smoke extraction was taken into consideration first, and the model of the construction in FDS was founded according to the 5 factors of smoke shaft opening size, the height of shaft, interlayer height, the side window height, hanging wall length etc. The best combination of smoke exhaust by orthogonal test was decided. After analyzing the smoke volume and the height of smoke from shaft, it was found that using the natural ventilation can＇t guarantee cover property safety with the fire power only 8 MW, so the mechanical ventilation was proposed.