Influence of train state on operation condition of underground railway station track exhaust systems

Investigates the influence of train state on underground railway station track exhaust systems of three types of underground railway stations in Guangzhou, through continuously monitoring the train state of station section tunnel and the exhaust wind speed and temperature of rail bottom and top. The results show that the static pressure varies with the changing of train state within station section tunnel, the static pressure with positive value enhances the exhaust performance of fan, in contrast, a negative value has adverse effect. The decompression effect of tunnel connected island-type platform station and side platform station is benefit to weaken the influence of train state on track exhaust system. Track exhaust system has a positive effect on the heat release of upper condenser, which will be more obvious with the longer stop time of train. The heat release effect of rail bottom is not obvious in the three types of underground railway stations.