CFD simulation on thermal environment in subway station tunnels

This research proposes a CFD simulation method for the temperature field in subway station tunnels, and the simulation method is verified by field measurements. The simulation can predict the inlet air temperature of the condensers during the train stop, and help to diagnose the shutdown risk of train air conditioners in advance. In addition, the air temperature distribution obtained from the simulation can provide a reference for improving the design of the heat exhaust system. The simulation results show that when the train is located in the subway station tunnel, the inlet air temperature of the condenser will be higher than that of the tunnel, and it will be affected by different factors such as the operation status of the heat exhaust fan and the number of passengers. When the air volume of the heat exhaust fan is 30 m3/s, the average inlet air temperature of the condenser under the fan-operating condition is 2.8 ℃ lower than that under the fan-off condition.