下沉式地铁维修库污染物分布的数值模拟分析  

Numerical Simulation Analysis of Pollution Distribution in Sunken Subway Maintenance Depot

作　　者：于晓波 毕海权[2] 尹涵 Yu Xiaobo;Bi Haiqu;Yin Han(China Railway Fifth Survey and Design Institute Group Co.,Ltd,Beijing,102600;School of Mechanical Engineering,Southwest Jiaotong University,Chengdu,610031)

机构地区：[1]中铁第五勘察设计院集团有限公司,北京102600 [2]西南交通大学机械工程学院,成都610031

出　　处：《制冷与空调（四川）》2023年第6期797-803,833,共8页Refrigeration and Air Conditioning

基　　金：苏州市轨道交通集团有限公司科研项目(SZZG06YJ1080007);苏州市科技计划项目(SS202115);中国铁建股份有限公司科研计划项目(2021-C57);中铁第五勘察设计院集团有限公司科研计划项目(T5Y2020-B01)项目名称:地下车辆基地消防、环境及节能相关技术研究项目。

摘　　要：为助力绿色城市轨道交通建设,优化城市空间结构,推广全地下地铁车辆基地已成为不可阻挡的趋势,其库区内空气品质和作业人员职业健康安全更是得到广泛关注。以某带上盖的下沉式地铁检修库为研究对象,采用FLUENT软件模拟分析库区气流组织和污染物空间分布情况,探究了车顶冷凝器热源及射流喷口距地面高度对挥发性有机气体(TVOC)排除效果的影响。结果表明:当车顶冷凝器由关闭至开启时,当车顶冷凝器由关闭至开启时,全库区污染均值浓度从1.02mg/m^(3)下降为0.56mg/m^(3),总积累量降低了1倍,近地面作业区域污染排除率明显提高。当一层检修平台侧送射流喷口由1.7m降低至1.1m位置,一层检修位工作区污染气体浓度从0.97mg/m^(3)降低至0.71mg/m^(3),库区污染总积累量降低了43%,各区域的清洁度均得到有效提高。In order to help the construction of green urban rail transit,optimize the urban spatial structure,and promote the whole underground subway vehicle base has become an irresistible trend,and the air quality and occupational health and safety of operators in the reservoir area have been widely concerned.In this paper,taking a submerged subway maintenance warehouse with a cover as the research object,FLUENT software was used to simulate and analyze the air distribution and spatial distribution of pollutants in the reservoir area,and the influence of the heat source of the roof condenser and the height of the jet nozzle from the ground on the elimination effect of volatile organic gases(TVOC)was explored.The results show that when the roof condenser is switched from closed to open,the mean pollution concentration in the whole reservoir area decreases from 1.02 mg/m^(3)to 0.56 mg/m^(3),the total accumulation decreases 1 times,and the pollution exclusion rate in the near-surface working area increases obviously.When the jet nozzle at the side of the first-floor maintenance platform is reduced from 1.7m to 1.1m,the pollution gas concentration in the working area of the first-layer inspection station is reduced from 0.97mg/m^(3)to 0.71mg/m^(3),the total pollution accumulation in the reservoir area is reduced by 43%,and the cleanliness of each area is effectively improved.

关 键 词：下沉式地铁维修库 TVOC 气流组织 污染物 射流通风 

分 类 号：X820.3[环境科学与工程—环境工程]