Axel Heinemann: 1 revision

2014-12-15T08:43:57Z

1 revision

Franz Schreier at 16:33, 14 December 2014

2014-12-14T16:33:20Z

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{{Powering Agriculture Technology Database
|PAT quality check=Yes
|PAT Name=Water Wheels
|PAT Picture=Water Wheels.jpg
|PAT Type RE=Renewable Energy
|PAT Description=A water wheel is a machine for converting the energy of free-flowing or falling water into useful forms of power, often in a watermill. A water wheel consists of a large wooden or metal wheel, with a number of blades or buckets arranged on the outside rim forming the driving surface. Most commonly, the wheel is mounted vertically on a horizontal axle, but the tub or Norse wheel is mounted horizontally on a vertical shaft. Vertical wheels can transmit power either through the axle or via a ring gear and typically drive belts or gears; horizontal wheels usually directly drive their load.
Water wheels were still in commercial use well into the 20th century, but they are no longer in common use. Prior uses of water wheels include milling flour in gristmills and grinding wood into pulp for papermaking, but other uses include hammering wrought iron, machining, ore crushing and pounding fiber for use in the manufacture of cloth.
Some water wheels are fed by water from a mill pond, which is formed when a flowing stream is dammed. A channel for the water flowing to or from a water wheel is called a mill race (also spelled millrace) or simply a ""race"", and is customarily divided into sections. The race bringing water from the mill pond to the water wheel is a headrace; the one carrying water after it has left the wheel is commonly referred to as a tailrace.
John Smeaton's scientific investigation of the water wheel led to significant increases in efficiency in the mid to late 18th century and supplying much needed power for the Industrial Revolution.
Water wheels began being displaced by the smaller, less expensive and more efficient turbine developed by Benoît Fourneyron, beginning with his first model in 1827. Turbines are capable of handling high heads, or elevations, that exceed the capability of practical sized waterwheels.
The main difficulty of water wheels is their dependence on flowing water, which limits where they can be located. Modern hydroelectric dams can be viewed as the descendants of the water wheel as they too take advantage of the movement of water downhill. They use a turbine instead of a wheel though.

Source: http://en.wikipedia.org/wiki/Water_wheel
|PAT Technology Application Hydro=Hydro
|PAT Value Other=All value chain steps with electrical power demand
|PAT Actions Other=All value chain activities with electrical power demand
|PAT Commodity Other=All commodity groups with electrical power demand
|PAT Dev Region Worldwide=N/A
|PAT Dev Region South Asia=
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|PAT Dev Region Not Available=Region of development cannot be named
|PAT Dep Region Worldwide=None
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|PAT Dep Region Not Available=
|PAT Dep Pot Region Worldwide=None
|PAT Dep Pot Region South Asia=
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|PAT Dep Pot Region Africa=
|PAT Dep Pot Country Africa=
|PAT Dep Pot Region East Asia=
|PAT Dep Pot Country East Asia=
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|PAT Dep Pot Region Not Available=
|PAT Manufacturers=http://waterwheelfactory.com/
|PAT Links=http://www.waterwheelfactory.com/hp-table.htm

http://permaculturewest.org.au/ipc6/ch08/shannon/index.html

http://www.youtube.com/watch?v=fNLc5r3R8sc

http://www.top-alternative-energy-sources.com/water-wheel.html

|PAT Category=Hydro Power
|PAT Pumping=
|PAT Lighting=
|PAT Heating=
|PAT Cooling=
|PAT Wind=
|PAT Biomass=
|PAT Biofuel=
|PAT Biogas=
|PAT Humans=
|PAT Animals=
|PAT Biochar=
|PAT Composte=
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}}

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Water Wheels (PA Technology) - Revision history

Axel Heinemann: 1 revision

Franz Schreier at 16:33, 14 December 2014