A railway vehicle includes a car body having a shell frame surrounding an internal area suitable for accommodating passengers, and a power generator connected to an external side of the car body and including an outlet for discharging out a liquid produced during generation of electricity. A hydraulic system is in fluid communication with the outlet and receives at least part of the liquid produced during generation of electricity. The hydraulic system includes a first end portion connected to the outlet, a second end portion, spaced apart from the first end portion, for draining out from the hydraulic system the received liquid, and a third intermediate portion which is interconnected between the first and second end portions and is placed, at least partially, in the internal area of the car body, which is adapted to be heated before receiving passengers.