Study On Tunnel Piston Wind In Shenzhen Metro Xiangmihu Island Station

Along with the cities'modernization, more and more cities all are drawing up the metro development or expanding and constructing the metro project. At the same time, the metro produces large quantity of heat raises the metro interior temperature the year by year, as a result the metro interior environment worsens gradually. The metro environment control system's operation energy consumption is an important part of the metro total energy consumption. Study on the metro thermal environment and analysis of the metro environment control system's operation situation have the vital significance to conserve energy.The metro environment control system is generally divided into the open type system, the close type system and the platform screens system. The merit of platform screens system is to reduce the hot load in the metro station, improve the environment on the station platform, minish the machinery room's area and depress the operation expense. Because the platform screens system's construction cost is very high, in the nation only then Shanghai, Shenzhen, Guangzhou and so on the minority city use the platform screens system. The tunnel piston wind is an important factor to the metro tunnel thermal environment.The site measure is one effective way to conduct the metro thermal environmental study. This topic takes the Shenzhen metro Xiangmihu island station's tunnel ventilation system as research object, through measuring the wind speed and temperature of the metro tunnel's representative cross-section to analyze tunnel piston wind's state of motion, contrast the wind speed and temperature's change tendency under different operating mode, thus provide the reference and suggestion for reasonably carrying on design, analyzing and evaluating performance, optimizing operation of the metro environment control system, and provide the essential foundation data and experiment verification for the further subway environmental simulation.