Berlin city transport operator BVG has awarded Liebherr-Transportation Systems a contract to equip one its Bombardier Flexity trams with an experimental occupancy-dependent fresh air control system.
Liebherr’s modelling has predicted that this could reduce the energy consumption of the tram’s air-conditioning system by up to 13%.
CO2 sensors are used to estimate the number of passengers on the tram, with the intake of fresh air automatically regulated to suit.