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目前建筑防排烟系统的常规设计尚存不足,对于无吊顶或镂空吊顶形式的空间,排烟口的开设方式被忽略。针对该类空间,该文进行了优化设计研究,提出了排烟口的开设不应只拘泥于常规设计中面向地面的向下排烟口,而应该更多考虑采用侧向排烟口和面向顶棚的向上排烟口。数值模拟结果比较表明:侧向排烟口和向上排烟口与常规设计的向下排烟口相比,烟气控制效果显著改善;其中向上排烟口获得的烟气控制效果最好,挡烟垂壁高度得以减小;优化设计方案可行且更加经济合理,提高了消防安全性。
At present, there are not enough conventional designs for smoke control systems in buildings. For the space without ceiling or hollow ceiling, the way of opening exhaust vents is ignored. In view of this kind of space, this article has carried on the optimized design research, proposed that the opening of the exhaust port should not be restricted to the downward facing exhaust port in the conventional design, but should consider more the lateral exhaust port and the facing Ceiling up the exhaust port. The numerical simulation results show that the flue gas control effect is significantly improved compared with the conventional design of the downward exhaust port, and the flue gas control effect obtained from the upward exhaust port is the best, The height of the smoke vertical wall can be reduced; the optimized design scheme is feasible and more economical and reasonable, and the fire safety is improved.