交通隧道CO动态浓度控制指标研究

合理的交通隧道通风控制浓度目标限值,不仅能够为司乘人员提供健康良好的行车环境,而且能够节约大量的电能。本文从纵向通风方式的污染物浓度分布趋势入手,分析了车辆通过隧道时人体受到污染物的暴露当量的表达式。进而研究了CO与人体的相互作用机理,应用初始条件得到了CFK方程的解析解及数值解。将3%作为人体血液中COHb浓度的最大允许值,并且综合考虑污染物浓度c和通过时间t两个指标,提出了一种基于动态浓度控制方式的污染物负载指标表达式。通过实例计算对所提出的控制指标进行验证,结果显示,本文提出的方法能够适应交通流不断变化的特点,对通风控制更具有合理性和可靠性。

Research on CO Dynamic Concentration Control Indicator in Traffic Tunnel

The target limit of reasonable traffic tunnel ventilation’s controlled concentration, not only provide a health driving environment for the driver and passenger, but also can save a lot of electricity. This paper starts from the distribution trends of pollutant concentration in the model of longitudinal ventilation, the pollutant exposure equivalent expression around the human body is analyzed, when vehicles pass through a tunnel. And then the mechanism of the interaction between CO and the human body is also analyzed. The analytical solution and numerical solution of the CFK equation are obtained by using the initial conditions. Using 3% as the maximum allowable value of COHb concentration in human blood, and two indicators which are pollutant concentration c and passing time t are comprehensively considered, and this paper proposes a pollutant load index expression based on the control method of dynamic concentration. The proposed control indicator is verified through calculation of example, as an obvious result, the method presented here is able to accommodate the characteristics of traffic flow changing, and is more rationality and reliability for ventilation control.