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Encyclopedia > Small hydro
Micro hydro in North-West Vietnam
Micro hydro in North-West Vietnam

Small hydro is the application of hydroelectric power on a commercial scale serving a small community or medium sized industry. A generating capacity of up to 10 megawatts (MW) is becoming generally accepted as the upper limit of what can be termed small hydro, although this may be stretched to 25 MW and 30 MW in Canada and the USA. In contrast many hydroelectric projects are of enormous size, such as the generating plant at the Hoover Dam (2,074 megawatts) or the vast multiple projects of the Tennessee Valley Authority. Micro Hydroelectric generation in NW Vietnam village. ... Micro Hydroelectric generation in NW Vietnam village. ... Hydroelectric dam diagram The waters of Llyn Stwlan, the upper reservoir of the Ffestiniog Pumped-Storage Scheme in north Wales, can just be glimpsed on the right. ... The megawatt (symbol: MW) is a unit for measuring power corresponding to one million (106) watts. ... The Hoover Dam Hoover Dam (36° 0′ 56″ N 114° 44′ 16″ W) is a concrete gravity-arch dam in the Black Canyon of the Colorado River, on the border between Arizona and Nevada. ... President Franklin D. Roosevelt signs the TVA Act The Tennessee Valley Authority is a New Deal agency created to generate electric power and control floods in a seven-U.S.-state region around the Tennessee River Valley. ...


Hydroelectric power is the technology of generating electric power from the movement of water through rivers, streams, and tides. Water is fed via a channel to a turbine where it strikes the turbine blades and causes the shaft to rotate. To generate electricity the rotating shaft is connected to a generator which converts the motion of the shaft into electrical energy.


Small hydro is often developed using existing dams or through development of new dams whose primary purpose is river and lake water-level control, or irrigation. A small-scale hydroelectric facility requires a sizeable flow of water and a reasonable height of fall of water, called the head.


Small hydro can be further subdivided into mini hydro, usually defined as less than 1,000 kW, and micro hydro which is less than 100 kW. Micro hydro is usually the application of hydroelectric power sized for small communities, single families or small enterprise. Micro Hydro is the term used for Hydroelectric power installations that typically produce up to 100kW of energy. ...


List of small installations

Snoqualmie Falls. ...

External links


  Results from FactBites:
 
Small scale hydro - Low Carbon Buildings Programme (585 words)
Improvements in small turbine and generator technology mean that micro hydro schemes are an attractive means of producing electricity.
Hydro power requires the source to be relatively close to where the power will be used, or to a suitable grid connection.
Hydro systems can be connected to the main electricity grid or as a part of a stand-alone (off-grid) power system.
"RED", Oct. 1995 - Small Hydro Power in Africa (893 words)
The modular nature of small hydro technologies allow even the poorest countries of the region to begin a phased energy investment programme that does not strain their national financial resources or draw funds from other basic needs.
The disperse and modular nature of small hydro power potential is in many respects alien to the culture of conventional utilities which are more comfortable with the large-scale and centralised projects.
Small hydro technology dissemination initiatives can be a component of an existing integrated income-generating project or environment programme; rural industrial programme or health extension programme.
  More results at FactBites »

 

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