建筑物走廊机械排烟量性能化研究

Performance research on mechanical exhaust smoke volume in building corridors

采用网络模型软件模拟预测建筑火灾烟气流运动特性,以火灾建筑内的人员作为被保护对象,提出网络模型条件下火灾烟气危险状态判据,从而确定人员可用安全疏散时间ASET。人员所需安全疏散时间RSET采用经验数据计算。比较ASET和RSET,从而确定走廊排烟量。利用实例进行了验证,计算结果表明,其他条件相同时,不同火源条件下的排烟量是不同的,在火源强度较大(250kW/m2)时,72m3/(m2.h)的排烟量为该条件下的最佳排烟量。

Analyses the properties of fire smoke flow by network model software,with the staffs in fire building as the protected object,and gives three fire danger criterion standards under the network model condition,which can be used to determine the available safety egress time（ASET）.The required safety egress time（RSET）can be counted by empirical data.Compares ASET and RSET to determine the corridor exhaust smoke volume.An example shows that exhaust smoke volume is different under different fire source conditions when other conditions are the same,and that the optimum exhaust smoke volume is 72 m3/（m2·h）under the condition of fire source with higher strength such as 250 kW/m2.