Large Eddy Simulation of Cooling Air Flow in Deep Underground Subway Station Without Screen Door

초록

Large eddy simulation is applied to investigate the temperature distribution and cooling air currents in the deep underground subway station under the condition of operating of air conditioning without screen door. Shin-gum-ho station (The line #5, Depth:46m) has been selected as a simulation model. The ventilation mode is ordinary state. The cool air of 47,316m3/h is supplied and the returned air of 33,980m3/h is exhausted in the lobby and the cool air of 33,968m3/h is supplied and the returned air of 76,190m3/h is exhausted in the platform. The temperature of cool supplied air in the diffusers is 10℃. The numbers of ventilation diffuser are 94 and 222 in the lobby and in the platform, respectively. Total of 7.5 million grids are generated for this simulation. In order to enhance the efficiency of calculation, parallel processing by MPI is employed.