隧道火灾集中排烟系统排热效率预测方法  

Prediction method of heat exhaust efficiency of centralized smoke exhaust system during tunnel fire

作　　者：何路[1] 张晓锦 王东伟 朱国庆[1] 袁狄平 徐志胜[4] HE Lu;ZHANG Xiaojin;WANG Dongwei;ZHU Guoqing;YUAN Diping;XU Zhisheng(School of Safety Engineering,China University of Mining and Technology,Xuzhou Jiangsu 221116,China;China Railway Liuyuan Group Co.,Ltd.,Tianjin 300308,China;Shenzhen Research Institute of China University of Mining and Technology,Shenzhen Guangzhou 518057,China;School of Civil Engineering,Central South University,Changsha Hunan 410075,China)

机构地区：[1]中国矿业大学安全工程学院,江苏徐州221116 [2]中铁第六勘察设计院集团有限公司,天津300308 [3]中国矿业大学深圳研究院,广东深圳518057 [4]中南大学土木工程学院,湖南长沙410075

出　　处：《中国安全科学学报》2023年第7期113-120,共8页China Safety Science Journal

基　　金：国家自然科学基金资助(52204252);国家消防救援局科技计划(2023XFCX16);“双一流”建设提升自主创新能力课题(2022ZZCX05K02)。

摘　　要：为探究排热效率对火灾时隧道排烟系统排烟性能的影响,提出一种火灾情况下隧道集中排烟系统排热效率理论预测方法,分析各系统参数对排热效率的影响,开展1∶20缩尺寸隧道模型火灾试验,并验证理论预测结果的准确性。研究表明:增加集中排烟系统排烟量是提高系统排热效率最有效的手段;随着火源功率的增加,排烟系统排热效率逐渐下降;系统总排热效率受排烟阀间距、尺寸、排烟道截面积、沿程阻力等参数影响较小,但在实际设计施工时需要考虑降阻密封的问题,避免系统阻力过大,排烟量降低。In order to explore the impact of heat removal efficiency on the smoke exhaust performance of tunnel smoke exhaust systems during fires,this paper proposed a theoretical prediction method for the heat exhaust efficiency of tunnel centralized smoke exhaust system under fire conditions.The influences of various parameters on heat exhaust efficiency were analyzed.A series of experiments were carried out in a 1∶20 scale model tunnel to verify the accuracy of the theoretical prediction results.Research shows that increasing the smoke exhaust volume of the centralized smoke exhaust system is the most effective means to improve the smoke exhaust capacity of the system.As the increase of the ignition sources power,the heat removal efficiency of the smoke exhaust system gradually decreases.The total heat removal efficiency of the system is less affected by parameters such as the spacing and size of smoke exhaust valves,cross-sectional area of smoke exhaust ducts and frictional resistance.However,in actual design and construction,it is necessary to consider the issue of reducing resistance and sealing to avoid excessive system resistance and reduce the smoke exhaust volume.

关 键 词：隧道火灾 集中排烟 排热效率 通风网络 排烟流速 

分 类 号：X928.7[环境科学与工程—安全科学]