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本文回顾在中庭中常用的烟气管理设计导则。概括了在这些导则中采用的不同方法,并解释了这些方法背后的烟气物理。这些设计导则中的烟气动力学的工程原理是相似的。基本上,方法包括强加逆向流来阻止烟气蔓延,采用压差来对付物理障碍物,烟气稀释和抽取。烟气通风看来是中庭中烟气管理的常用方法,可以将烟气层界面的高度保持在可接受值,或者至少降低烟气层的下降速率。这些导则给出了设计的一般原则,但并未覆盖所有中庭,特别是在远东地区新建建设性项目中的中庭。
This article reviews guidelines commonly used in flue gas management in the atrium. Summarizes the different approaches used in these guidelines and explains the flue gas physics behind these approaches. The engineering principles of smoke dynamics in these design guidelines are similar. Basically, the methods include imposing a reverse flow to stop the spread of fumes, using pressure differentials to deal with physical obstructions, flue gas dilution and extraction. Flue gas ventilation appears to be a common approach to flue gas management in the atrium, keeping the height of the flue gas layer interface at an acceptable value, or at least reducing the rate of flue gas layer descent. These guidelines give general principles of design but do not cover all atriums, especially atriums in new constructive projects in the Far East.