Metro is a form of rail transportation that refers to a mode of rapid, high-capacity urban rail transportation using electric traction that has evolved along the lines of surface rail systems. Subways may be converted to at-grade or elevated segments outside of city centers in order to fit the built environment and to take into account construction and operating costs. Metro is a high-density, high-capacity urban rail transit system that encompasses a variety of underground and aboveground rights-of-way in urban areas.
The subway is a very convenient and fast announcement of transportation facilities to ease the pressure of road traffic, but for an underground project, the headache and difficult to deal with the problem is how to solve the moisture, moisture and mold and other problems.
In the subway construction period, the tunnel project of the alleyway humidity is too high, condensation formation of wall dew droplets, resulting in the inability to construct or affect the schedule of the problem. Subway tunnels are poorly ventilated due to the special underground space environment and stratigraphic structure, and water seepage and leakage in some places of the tunnel wall. Using the ventilation method to send the air outside the project into the project, absorbing the water inside the project and then discharging it to the ground, which is a good way, but the subway project is underground, it is difficult to ventilate, so this method is more difficult to realize.
Subway traffic, resulting in the subway tunnel humidity is particularly large, much larger than the national humidity level 2 standard RH value. With the progress of science and technology, the station's electronic equipment is also more and more, and the subway platform in the underground more humid, long-term will affect the normal use of electronic equipment, there are security risks.
Comprehensive above the humidity problem, the use of industrial dehumidifiers is still very necessary, and the purchase of the following two points of concern:
1, during the subway project, dehumidifier placement should be based on the occasion to see the construction site is not the best placement of dehumidifiers. In the subway project, the dehumidifier can be customized into a pipe dehumidifier, so that with the subway exhaust circulation system, can use reasonable space does not occupy the underground ground space.
2, the subway platform is the subway underground the highest rate of use of the public activities, personnel frequent, the location of the space is open. The use of industrial dehumidifiers, and general warehouses, workshops and other places to use dehumidifier environmental conditions are not the same. If only to meet the public riding the subway when the environment required, the ambient air humidity in 65% RH can be. If the subway project dehumidifier used with the subway stations along the electrical control room, it is best to stabilize at 45% to 50% between the ambient humidity is also most of the electrical equipment on the control of ambient humidity needs. Metro electrical control room can usually do a good job of sealing measures, so the model is generally cabinet-based, dehumidifier requires stable performance.
