闭式地铁系统内部CO2浓度模拟研究
Simulation of CO2 concentration in a underground railway during close mode operation
摘要：
以地铁车站、区间隧道和地铁车厢内的典型污染物CO2为研究对象，采用理论分析、模拟计算和现场测试等方法，对闭式地铁系统内部的空气品质进行了研究。基于污染物浓度的基本模型，分析了地铁内部的通风情况，建立了地铁内部CO2浓度的计算模型。选取一条闭式运行的地铁线路，对其内部CO2浓度进行了模拟计算，并将模拟结果与实测结果进行了对比分析。结果表明，模拟结果与实测结果基本一致。该方法可用于分析设计阶段闭式地铁系统内部的CO2浓度变化情况，从而指导闭式地铁环控系统的设计。
Abstract：
Selecting the CO2 concentration as an indicator of the air quality in underground railway stations, interval tunnels and carriages, studies the indoor air quality of closed underground railway systems. Based on the basic model of contamination concentration, analyses the ventilation conditions of underground railway stations, tunnels and carriages, and establishes a calculation model of CO2 concentration. Selects a typical underground railway line for simulation of the CO2 concentration changes, and verifies the calculation result by comparing with the field test result. The comparison shows that the simulation result is consistent with the field test result. The calculation method can be used to analyses the CO2 concentration in underground railway at the design stage, thereby helping designers to determine a reasonable scheme and operation mode of the environmental control system of a underground railway.
Keywords:undergroundrailway,closemodeoperationsystem,airquality,CO2concentration,simulationmethod