UVC lamp
Indoor air quality in railway vehicles
Besides the legal requirements about particle retention and limits of CO2 concentration, the fact that more and more people use rail transport calls for new systems to assure better indoor air quality.
Merak has launched a project analysing the factors that influence the air quality inside the railway vehicle, in order to study their sources and find technical solutions that allow removing the most health damaging pollutants from the air.
After evaluating existing technologies, Merak has applied UV technology in order to improve the inside air, a system which has already been used in several projects.
At present, Merak is tackling the best possible technical solutions for the different types of railway vehicle, by analyzing the impact in cost, comfort, and indoor air quality improvement.
Pressure variations (external and internal) at 200km/h with pressure wave protection system
Pressure wave protection system
The passage of a train through a tunnel at high speed generates pressure waves that can cause aural discomfort to passengers.
Merak offers a solution for detection of these pressure waves and for making sure that they don't bother passengers:
Modern high speed trains are equipped with a system that will detect the variation of outside pressure. When triggered, the protection system closes fast acting valves which are installed in the fresh air and exhaust air openings of the car and thus seal the vehicle. This way the inside pressure follows the outside pressure with a certain delay, which avoids the aural discomfort.
Both systems have been implemented in numerous high-speed applications.
Pressure wave protection valves in fresh air grill and exhaust unit
