Adapting a Highspeed Train..
When operating a high-speed train in the winter, one thing certain to be encountered is snow. At such high travel velocities, snow can swirl up and accumulate in the cooling air channels of the individual cars. This buildup of snow can be so large that the outside air taken in to cool the cars is reduced or the intake duct completely blocked. As a consequence, there can be a rise in temperature in the cars and under the floors that must be alleviated. If the temperature under the floors gets too high, the result can be failure of traction system components such as the main air compressor, traction converter, traction converter cooler, exhaust air unit and cooling fan of the traction bogie (the chassis carrying the wheels), which can lead to shutdown of the train.
At Siemens AG in Germany, designers faced an extreme snow buildup challenge while engineering the Velaro RUS, a 10-car, 600-passenger train built in Germany for operation at speeds of up to 155 mph (250 km/h).
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