建筑防火设计中补风设计的讨论

Study on air make-up design in building fire prevention design

我国现行消防技术规范对建筑补风设计的要求不够明确,使得设计人员对规范条文有不同的理解,导致设计结果差异较大,不恰当的补风设计可能导致火灾烟气无法有效排除。分析了相关规范关于补风设计的差异,通过数值计算对某大空间建筑防排烟方案进行了对比分析,研究了补风对排烟效果的影响。结果表明补风速度对排烟效果有显著影响,防排烟设计中需重视补风速度控制。

Due to the lack of detailed requirements for air make-up design in current fire prevention and protection codes, misunderstandings are easily made. As this may lead to improper make-up air design, the efficiency of smoke exhausting will be reduced. This paper illustrated the smoke exhaust strategy of a large, tall space building, trying to study impacts of air make-up upon smoke exhaust performance. The results show that the velocity of the make-up air has great influence on smoke exhaust efficiency. Great attention should be paid in the designing of make-up air system.