Hydroelectric Power Generation


How does Hydroelectric Power Generation work:

In hydroelectricity water potential energy works with gravitational forces. Power plants are generally built near attached waterfalls, where enough river or seasonal rain water reserved available and the kinetic energy is the greatest. To control the flow of water some time dams are required to build. When water released from the reservoir it flows down with heavy forces which rotate the turbine where generator is shafted with it generate electricity. After the water has passed through the turbine, it’s returned to the river. This power generating process is very much eco-friendly and harmless for environment compared to thermal power plant. Generating cost also the lowest in the typical power generating process.

History of Hydro Power:

Ancient people is learned to use hydro-power grinding flour and other tasks. Near about 1770 AD, French engineer Bernard de Belidor architected some technique to use hydro-power in horizontal and vertical-axis machines and since late 19th century hydro-power is  using widely in industrial purposes. In 1878, William George Armstrong developed hydroelectric power plant for very first time.

Now about 16 percent of global electricity is generating from hydro-power plant. Asia-pacific region are generating about 32 percent hydroelectricity and Three Gorges dam in China is the world largest hydroelectricity power plant so far.  China, Brazil, Paraguay, Venezuela are the largest hydro-power producer country.

Three Gorges Dam

Largest Hydroelectric Power Plant:

The Three Gorges Dam in China is the world largest hydroelectric power plant which completed in 2012, generating capacity 22,500 megawatts (MW), height about 594 feet (181 meters (m), length about 7,770 feet (2, 335 m), surface area of reservoir about 400 square miles (1,045 square kilometers) and extends upstream from the dam about 370 miles (600 kilometers).

To gather basic idea about hydroelectricity generation worldwide we can quote some world largest hydroelectric power plant with generating capacity:

Three Gorges Dam, China: 22,500 MW
Itaipu, Brazil & Paraguay: 14,000 MW
Guri, Venezuela: 10,200MW
Tucuruí, Brazil: 8,370 MW
Grand Coulee, United States of America: 6,809MW
Sayano-Shushenskaya, Russia: 6,400 MW
Longtan, China: 6,300 MW
Krasnoyarsk, Russia: 6,000 MW
Robert-Bourassa, Canada: 5,616 MW

Churchill Falls, Canada: 5,428 MW

Fig: Generation of  Hydroelectricity



Sources: Wikipedia/ http://water.usgs.gov/ http://www.power-technology.com/

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