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高大的空间一般人群密集,人流量较大,疏散距离长,所以其排烟系统对人员的安全保障尤为重要。本文基于这一现实情况,首先把排烟量等于烟气产出量作为基本要求,分析高大空间自然排烟的可行性。然后并利用火灾烟气模型和火灾动力学理论,计算出高大空间排烟气的各项物理性参数,系统的阐述了大空间的排烟系统开窗面积的计算方法。最后,研究分析延期流动与控制的具体举措。
Tall space crowds in general, large human traffic, evacuation distance, so the exhaust system of personnel security is particularly important. Based on this reality, this paper first makes the quantity of exhaust gas equal to the output of flue gas as the basic requirement and analyzes the feasibility of natural exhaust in tall space. Then, using the fire flue gas model and the fire kinetic theory, the physical parameters of exhaust fumes in tall space are calculated, and the calculation method of fenestration area of smoke exhaust system in large space is expounded systematically. Finally, we study and analyze concrete measures to delay the flow and control.