动车组司机室挥发性有机物污染水平研究

Pollution of Volatile Organic Compounds in EMU Cab

结合材料与部件袋式法测试和计算流体动力学(CFD)方法,对动车组整车司机室5种高危挥发性有机物(VOCs)进行数值预测,并对司机室挥发性有机物在开启新风后呼吸界面浓度的变化进行数值仿真,其研究结果表明:可以利用材料和零部件袋式法的测试结果预测司机室的VOCs浓度并评估其对司机的健康安全影响,且通过CFD模拟通风装置开启后,随新风逐渐向整个司机室扩散,经净化空气的混合稀释作用,总挥发性有机物(TVOC)在3 h后由9.020 mg/m^(3)降低至0.039 mg/m^(3),符合行业标准限值要求,其余目标污染物浓度水平在3 h后降至0.004 mg/m^(3)以下。

Based on material and component bag method test and computational fluid dynamics(CFD)method,five high-risk volatile organic compounds(VOCs)in EMU's cab were numerically predicted,and the change of VOCs concentration in the breathing interface of the cab after fresh air is introduced was numerically simulated.The results show that the test results of the material and component bag method can be used to predict VOCs concentration in the cab and evaluate its impact on the health and safety of drivers.After the drafting apparatus is started by CFD simulation,the VOCs gradually diffuse to the whole cab together with the fresh air.3hrs later,TVOC is reduced from 9.020 mg/m^(3) to 0.039 mg/m^(3) through the mixed dilution of purified air,which meets the requirements of the industry standard.The concentration levels of other target pollutants lowered to less than 0.004 mg/m^(3) after 3h.