城市建筑群影响下的实验室废气排放与扩散模拟  

Simulation of laboratory exhaust emission and diffusion under influence of urban buildings

作　　者：王晨龙[1] 王堃[1] 左朋莱[1] 高佳佳[1] 张晓曦[1] 童亚莉 韩悦 李冰洋[2] WANG Chenlong;WANG Kun;ZUO Penglai;GAO Jiajia;ZHANG Xiaoxi;TONG Yali;HAN Yue;LI Bingyang(Beijing Municipal Institute of Labor Protection,Beijing 100054,China;Office of Laboratory Management,Tsinghua University,Beijing 100084,China)

机构地区：[1]北京市劳动保护科学研究所,北京100054 [2]清华大学实验室管理处,北京100084

出　　处：《实验技术与管理》2021年第11期308-314,共7页Experimental Technology and Management

基　　金：北京市科学技术研究院北科萌芽计划(BGS201911)。

摘　　要：为了准确探究实验室废气在城市建筑群影响下的扩散情况,采用现场实测数据作为边界条件,对科研实验室废气的排放及扩散情况进行了CFD模拟。CFD模拟较高斯扩散模式更适用于城市建筑群下气体浓度计算,模拟结果展示了实验室废气在复杂城市建筑群中的浓度分布特征,以及在近地面层及楼宇表面的复杂扩散形态。模拟计算表明实验室废气的实测排放浓度没有超过北京市地方标准的排放限值,但污染物随空气扩散后至周边道路及建筑表面,落地后污染物的影响仍需引起相关部门重视,建议合理引导实验室用户安装尾部净化设施,降低周边居民的健康风险。In order to accurately explore the diffusion of laboratory wast gas under the influence of urban buildings,the field measured data is used as the boundary condition to carry out CFD simulation of the emission and diffusion of laboratory waste gas. The CFD simulation is more suitable for gas concentration calculation under the urban buildings than the Gaussian high-speed diffusion model. The simulation results show the concentration distribution characteristics of laboratory exhaust gas in the complex urban buildings, as well as the complex diffusion form near the ground floor and the building surface. Simulation calculation shows that the measured emission concentration of waste gas from laboratories is no more than the local standard emission limits in Beijing,but along with the air pollutants diffusion to the surface of surrounding roads and buildings, the influence of pollutants after landing still needs to be paid attention to by relevant departments. It is suggested to reasonably guide laboratory users to install tail purification facilities to reduce the health risks of surrounding residents.

关 键 词：计算流体力学 实验室废气 排放 扩散 

分 类 号：X823[环境科学与工程—环境工程]