基于清洁能源车辆调查的太岳山隧道通风方案优化

Optimization of Ventilation Scheme for Taiyueshan Tunnel Based on Survey of Clean Energy Fuelled Vehicles

以山西黎霍高速太岳山隧道为例,调查了路段交通流中天然气重卡的比例。根据天然气发动机排放特性,给出了需风量处理方法。通过修正计算需风量,太岳山隧道的远期控制需风量下降了31.8%。通过对比风量修正前的2种通风方案,“二斜井一竖井+静电除尘”和“三斜井+静电除尘”,以及修正后的2种通风方案,“三斜井”和“两斜井+静电除尘”,推荐“三斜井”方案。引入静电除尘装置可增加通风分段长度,但工程造价较高。优化后的“三斜井”通风方案相较于原方案可节约工程造价约3000万元。对于大型货车比例高的特长公路隧道,在需风量计算时有必要考虑清洁能源车辆对污染物排放的影响,以避免通风系统规模过大。

Taking the Taiyueshan tunnel of Shanxi Lihuo expressway as an example,the proportion of natural gas fuelled heavy trucks is investigated and estimated.According emission characteristics of natural gas engine,the treatment method of the air demand is proposed.By correction of the calculated air demand,the long-term control air demand of the Taiyueshan tunnel is reduced by 31.8%.By comparing two ventilation schemes before the air demand correction(“two inclined shafts+one vertical shaft+one electrostatic precipitator”and“three inclined shafts+one electrostatic precipitator”)with two ventilation schemes after correction(“three inclined shafts”and“two inclined shafts+one electrostatic precipitator”),the“three inclined shafts”scheme is recommended.The electrostatic precipitator can increase the length of the ventilation section,but the engineering cost is high.Compared with the original schemes,the optimized ventilation scheme of“three inclined shafts”can save about 30 million Yuan in project cost.For the super long highway tunnel with a high proportion of large trucks,it is necessary to consider the influence of natural gas engine vehicles in calculating air demand to avoid the excessive scale of ventilation systems.