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烟气是火灾中人员致死的主要原因。文章阐述了影响烟气蔓延的主要因素有烟囱效应、浮力、扩散力和风力。通常烟控系统设计,是根据烟气羽流的产烟量确定排烟量。在性能化设计中,防烟分区面积、排烟口的数量、排烟口的最大体积流速、补风口位置、补风量、补风风速等方面与常规设计有较大差异。本文介绍了性能化烟控设计的结果应当进行模拟验证,并通过量化的指标进行安全评价。
Smoke is the main cause of death in fire. The article states that the main factors that affect the spread of smoke are chimney effect, buoyancy, spreading force and wind force. Smoke control system design is usually based on smoke plume to determine the amount of smoke output. In performance-based design, there are big differences from the conventional design in terms of the area of smoke prevention, the number of exhaust vents, the maximum volume flow velocity of exhaust vents, the position of bleed air outlets, the fill air volume and the wind speed of makeup air. This article describes the results of performance-based smoke control design should be verified by simulation, and through quantitative indicators for safety assessment.