Study Of The Effect Of The Subway Platform Screen Doors On The Load Of The Platform Air Conditioning System

Along with the speeding up of Chinese urbanization process, the city traffic has become more and more serious. With the high efficiency, fast, safety features, the rail transportation have been widely used, especially the subway has become an important means of transportation. However, the subway energy consumption take the most part energy consumption in the urban construction. The energy consumption of the environmental control system takes the most part of the subway energy consumption,second only to the traction energy consumption of the train. Therefore, how to accurately predict the subway energy consumption, achieve energy conservation and emissions reduction, has become the important subject in the construction of the subway.At present, with the platform screen door system, while in a certain extent have played an important role in energy conservation and emissions reduction, however, no specific data platform screen door system, the design parameters of the air conditioning system of subway. Therefore, it is great significance for studying of the effect of the subway platform screen doors on the load of the subway air conditioning system.In this paper, select a typical underground platform as the research object in Xi’an.In the train cycle, the size of the leakage air volume was numerical simulated.According to the simulation results, and combine the typical climate in summer in Xi’an,to calculate the influence of the platform screen door on air conditioning load and put up the load indicators. Through the method of numerical calculation, the basically conclusions are as follow:1. When the door is close, the value of the hot air is 0.3429m3, from the tunnel into the platform area through the door caused by the train station; the value of the cold air is26.21m3, from the platform area into the tunnel through the door caused by the train station; the value of the hot air is 0.26m3, from the tunnel into the platform area throughthe door caused by the train outbound; the value of the cold air is 14.82m3, from the platform area into the tunnel through the door caused by the train outbound; the value of the leakage air volume caused by two trains station or outbound, is 2 times caused by one train station or outbound, respectively; Whatever the train station or outbound, the leakage air volume is very small, this reflects the economy of the platform screen door in the subway;2. When the door is open, the leakage air volume is the largest part during the train operation process. Whether a train or two trains station at the same time, at the end of the train, the direction of the leakage air volume is from the tunnel into the platform,thus increase the cooling load of the air conditioning system in the platform area; at the head of the train, the direction of the leakage air volume is from the platform into the tunnel, thus lose the cooling load of the air conditioning system in the platform area;Contrast the whole train corresponding the platform screen door leakage air volume, the smallest part in the middle of the train;3. In the whole process of the platform screen door is open, the value of the hot air is 714.55m3, from the tunnel into the platform area through the door caused by one train station; the value of the cold air is 788.33m3, from the platform area into the tunnel through the door caused by one train station; the value of the hot air is 1441.5m3, from the tunnel into the platform area through the door caused by two trains station, is 2.02 times caused by one train station; the value of the cold air is 1844.5m3, from the platform area into the tunnel through the door caused by two trains station, is 2.34 times caused by one train station;4. In a driving cycle, when one train station, the average load caused by the platform screen doors in the initial stage of the operation, short-term operation and long-term operation were 219.11 k W, 307.68 k W, 425.78 k W, respectively; when two trains station, the average load caused by the platform screen doors in the initial stage of the operation, short-term operation and long-term operation were 523.02 k W, 701.62 k W,939.74 k W, respectively.