高层建筑防烟楼梯间加压送风效果影响因素的网络模拟分析

Network Simulation on the Influence Factors of the Mechanical Air Supply Effect of Smoke- proof Staircase in High- rise Buildings

目前机械加压送风是高层建筑防烟楼梯间中最常用的防烟方法,在加压送风系统的设计和施工过程中,需要考虑多种因素,才能保证系统的防烟效果。因此,有必要对影响高层建筑防烟楼梯间加压送风效果的几个重要因素进行研究。以一18层高层建筑为例,利用网络模拟软件CONTAM模拟分析前室送风口数量及尺寸对防烟楼梯间加压送风效果的影响。结果表明:在高层建筑防烟系统的设计过程中,前室的送风口尺寸可以按照随着距风机距离增大而呈指数递增的规律进行设计;在前室送风系统中,在保证加压送风量合理的基础上,只开启着火层的送风口,其防烟效果比较好。

Mechanical air supply method is the most common method used in vertical means of escape to control the spread of smoke. In order to ensure smoke - proof effect, plenty of factors need to be considered into the progress of design and construction for mechanical air supply system. studying the factors which influence the smoke -proof effect of the staircase in high - rise building is useful for designing reasonable smoke control system. In this paper, an 18 -floors building is used as a sample, and the network simulation software CONTAM is used to simulate the in- fluence of the number and size of outlets on the smoke - proof effect of staircase. The results show that： Designers can design the size of outlets by exponential increasing law with the increasing distance between the fan and the opening air supply outlet. Besides, when the outlet of the fire floor is opened individually, it showed better smoke - proof effect.