Comparison of the Cooling Efficiency of Screen-Door OPEN/CLOSE in Underground Subway Station

초록

The percentage of electricity consumption for air conditioner in the subway station is more than 65%. In this study, the temperature distribution in the lobby and platform of subway station with platform screen-door is investigated under the condition of operating of air conditioning. The effects of cooling efficiency according to the screen-door opening and closeness in the platform are compared with each other. Shin-gum-ho station(The line # 5, Depth: 46m) has been selected as a simulation model. The ventilation mode is ordinary state and 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 were generated for this simulation. In order to enhance the efficiency of calculation, parallel processing by MPI was employed and Large Eddy Simulation method was adopted.