摘要
本文对上海某隧道CO和NO2排放量和需风量进行了计算,并采用三维数值模拟的方法对隧道峒口集中排放废气的扩散进行了分析。计算结果表明隧道内稀释NO2的风量要大于CO,且峒口排放的废气中NO2对周围环境的影响要大于CO。因此在隧道通风设计中应重视NO2的影响。环境风对峒口污染物扩散影响很大,横向风会导致隧道背风侧很大范围区域内污染物浓度超标。
The emissions and air demands of CO and NO2 for a road tunnel in Shanghai were calculated, and the dispersion of CO and NO2 from tunnel portal using a numerical simulation method was studied. The results indicate that the air demand for diluting NO2 is greater than that for CO, and the environmental effect of NO2 is greater than CO. So it shows necessity to consider NO2 in tunnel ventilation design. Environment wind has a great influence for dispersion of pollutants from tunnel portal. Transversal wind will result in large range excesses of pollutant concentration.
出处
《建筑热能通风空调》
2013年第6期27-30,共4页
Building Energy & Environment
关键词
城市隧道
峒口
二氧化氮
扩散
tunnel, portal, nitrogen dioxide, dispersion
