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基于《建筑防烟排烟系统技术规范》(送审稿),根据NFPA 204(2012)中火灾烟气层高度计算模型,研究中速火和快速火条件下不同净高和防烟分区面积对烟气层厚度的影响。结果表明,不同火源类型和建筑净高的组合都对应着一个有效控烟的临界防烟分区面积。若建筑中防烟分区面积大于该临界值则能达到有效控烟的目的;反之,则需要根据烟气层厚度适当调整挡烟垂壁高度以改善控烟效果。研究结果可为建筑防烟分区面积和储烟仓高度的确定提供参考。
Based on the Technical Specifications for Building Smoke and Smoke Exhaust System (draft for review), according to the calculation model of fire flue gas layer height in NFPA 204 (2012), the effects of different net height and smoke area ratio The effect of flue gas thickness. The results show that the combination of different types of fire sources and building heights corresponds to a critical smoke control area for effective tobacco control. If the area of smoke-proof construction in the building is greater than the critical value, the purpose of effective tobacco control can be achieved; on the contrary, the height of the smoke curtain wall needs to be adjusted according to the thickness of the smoke gas layer to improve the tobacco control effect. The research results can provide a reference for the determination of smoke-proof area and storage height of building.