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A national network of high speed trains can be powered by a combination of renewable energy sources including wind, solar, geothermal, and ocean/tidal energy.America's dependency on oil is the most severe in the world, and inevitably pulls us into costly resource wars.
Convection heat transfer coefficient which is a function of speed of the railway vehicle is applied to surfaces of the brake disc to simulate cooling during and after braking. The relationship between heat transfer coefficient and train speed on different surfaces is plotted in Fig.