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  • #32787
    Profile photo of 74
    74
    Survivalist
    rnews

    A hydraulic ram, or hydram, is a cyclic water pump powered by hydropower. It takes in water at one “hydraulic head” (pressure) and flow rate, and outputs water at a higher hydraulic head and lower flow rate. The device uses the water hammer effect to develop pressure that allows a portion of the input water that powers the pump to be lifted to a point higher than where the water originally started. The hydraulic ram is sometimes used in remote areas, where there is both a source of low-head hydropower 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.

    Pump Performance:

    Some information suggests that typical ram pumps discharge approximately 7 gallons of water through the waste valve for every gallon pressurized and pumped.  The percentage of the drive water delivered actually varies based on the ram construction, vertical fall to pump, and elevation to the water outlet.  The percentage of the drive water pumped to the desired point may be approximately 22% when the vertical fall from the water source to the pump is half of the elevation lift from the ram to the water outlet.  It may be as low as 2% or less when the vertical fall from the water source to the pump is 4% of the elevation lift from the ram to the water outlet

    http://www.clemson.edu/irrig/equip/ram.htm

    #32813
    Profile photo of freedom
    freedom
    Survivalist
    rnews

    interesting read. Thanks 74

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