Study On One Tunnel Piston Tube In PSD System

With the development of modern urban and the rapid growth of population and economy, the world's major cities require subway system developing with a faster pace. Meanwhile, the heat generated from subway is increasing and the environment control system is needed to discharge a large amouut of waste heat, therefore, the energy consumption of environmental control system takes a big amount in subway total energy consumption. Subway platform screen doors system has the advantage of reducing the heat load of subway station, improving the waiting environment of station platforms, and decreasing the plant room area and the operation costs of metro environmental control system. With the upgrading of the cities' whole function, PSD has been used in increasing number of world's subways, not only in the southern city where have long summer, but also in northern city with shorter air conditioning period platform screen doors is also gradually used.Subway air shaft and ventilation pavilion occupy too much floor space of metro subway, which is seldom to used especially in urban centers; the tunnel piston wind has important influence on subway tunnel thermal environment, so the piston air shaft set in the PSD system is essential. Therefore, to study subway thermal environment, to study number of piston air shaft and air pavilion, and to analysis operation of environmental control systems are meaningful to conserve metro space and to save energy.By simulation single piston wind shaft was proved to be the best solution in metro system with PSD in northern city, which was applied in Jingbin light railway and No.2 and No.3 Line of Tianjin Metro to save initial invest and space.On-site measure is an effective way for the subway thermal environment study. The dissertation takes the ventilation system of the island station of Shenzhen Convention and Exhibition Centre No.1 Line as studying object, to analysis the motion features of piston wind tunnel through on-site measurement of wind speed and temperature of the selected subway tunnel test section,and compare wind speed and temperature trends under the two conditions which are opening all the piston air shaft and opening the single-piston air shaft. So as to provide a reference for the reasonable application of the Northern Survey Platform Screen Doors system design, analysis and evaluation of operation, optimization of operation and management..