… in the ICE 3 class 403 train use ambient air for cooling. Source: Deutsche Bahn AG Rail vehicles include local and long-distance trains, suburban fast trains, … of two years. Air conditioning systems based on air-cycle technology show advantages over usual air conditioning systems with fluorinated refrigerants in terms of … for trains – Field data measurement and analysis on the ICE 3 air-cycle system Tags air-conditioning system CO2 air conditioner rail transport … Rail vehicles …