A hydraulic ram, or hydram, is a cyclic water pump powered by hydro power means it does not need any external energy source. The concept behind the ram idea is a “water hammer” shock wave. Water has weight, so a volume of water moving at a certain speed has momentum – it doesn’t want to stop immediately. If a car runs into a brick wall the result is crumpled metal. If a moving water flow in a pipe encounters a suddenly closed valve, a pressure “spike” or increase suddenly appears due to all the water being stopped abruptly (that’s what water hammer is – the pressure spike) .The hydraulic ram can be used in remote areas, where there is both a source of low-head hydro power and a need for pumping water to a destination higher in elevation than the source. In this situation, the ram is often useful, since it requires no outside source of power other than the kinetic energy of flowing water. It is extremely helpful in hilly terrains.
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