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以北京嘉铭中心的中庭为例,研究采用自然排烟代替机械排烟系统的可能性。通过FDS数值模拟研究方法,对比在超高中庭内部设置自然排烟和机械排烟系统的相同点和不同点,通过对比不同火灾场景、不同火灾烟气蔓延时间的温度和能见度,排烟口的速度矢量,研究烟囱效应和热障效应对自然排烟的影响,对自然排烟系统进行优化设计。最终,通过有效措施,满足自然排烟的条件,达到良好的排烟效果。
Taking the atrium of Beijing Jiaming Center as an example, the possibility of using natural smoke exhaust instead of mechanical smoke exhaust system was studied. By means of FDS numerical simulation method, the same points and different points of setting natural smoke exhaust and mechanical smoke exhaust system in super high atrium are contrasted. By comparing the temperature and visibility of different fire scenes and different fire smoke spread time, Velocity vector to study the influence of chimney effect and thermal barrier effect on natural smoke exhaust, and to optimize the design of natural smoke exhaust system. Finally, through effective measures to meet the conditions of natural smoke and smoke to achieve good results.