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  2. Micro hydro - Wikipedia

    en.wikipedia.org/wiki/Micro_hydro

    Overshot water wheel maximum efficiency (hydraulic efficiency) is 85%. [12] [13] Undershot water wheels can operate with very low head, but also have efficiencies below 30%. [14] Gravitation water vortex power plant : part of the river flow at a weir or natural water fall is diverted into a round basin with a central bottom exit that creates a ...

  3. Low-head hydro power - Wikipedia

    en.wikipedia.org/wiki/Low-head_hydro_power

    Cross-flow turbine: Also known as Banki-Mitchell or Ossberger turbines, these devices are used for a large range of hydraulic heads (from 2 to 100 meters) and flow rates (from 0.03 to 20 m 3 /s), but are more efficient for low heads and low power outputs. They are considered "impulse" turbines, since they get energy from water by reducing its ...

  4. Residential water use in the U.S. and Canada - Wikipedia

    en.wikipedia.org/wiki/Residential_water_use_in...

    In an average home, showering is the second largest water use after toilets. The average shower uses 15.8 gallons (59.7 liters) and lasts for 7.7 minutes at average flow rate of 2.1 gallons per minute (gpm) (7.9 liters per minute). [1] On average, in a household of average size (2.65 persons) 12.4 showers are taken each week.

  5. Pico hydro - Wikipedia

    en.wikipedia.org/wiki/Pico_hydro

    A pico hydro system made by the Sustainable Vision project from Baylor University [1]. Pico hydro is a term used for hydroelectric power generation of under 5 kW. These generators have proven to be useful in small, remote communities that require only a small amount of electricity – for example, to power one or two fluorescent light bulbs and a TV or radio in 50 or so homes. [2]

  6. Water turbine - Wikipedia

    en.wikipedia.org/wiki/Water_turbine

    The construction of a Ganz water Turbo Generator in Budapest in 1886. Water wheels have been used for hundreds of years for industrial power. Their main shortcoming is size, which limits the flow rate and head that can be harnessed. The migration from water wheels to modern turbines took about one hundred years.

  7. Francis turbine - Wikipedia

    en.wikipedia.org/wiki/Francis_turbine

    Francis type units cover a head range from 40 to 600 m (130 to 2,000 ft), and their connected generator output power varies from just a few kilowatts up to 1000 MW. Large Francis turbines are individually designed for each site to operate with the given water flow and water head at the highest possible efficiency, typically over 90% (to 99% [6]).

  8. Screw turbine - Wikipedia

    en.wikipedia.org/wiki/Screw_turbine

    The volume of water that enters an Archimedes screw turbine depends on the inlet water depth and the screw's rotation speed. To estimates the total flow rate passing through an Archimedes screw turbine for different rotation speeds (ω) and inlet water levels the following equation could be used:

  9. Forced circulation boiler - Wikipedia

    en.wikipedia.org/wiki/Forced_circulation_boiler

    The secondary pump takes the feed water going to the boiler and raises the pressure of the water going in. In a natural circulation boilers, the circulation of water is dependent on the differential pressures caused by the change of density in the water as it is heated. That is to say that as the water is heated and starts turning to steam, the ...

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