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johana betancur

on 12 February 2013

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Transcript of Hydropower

Yessica Carvajal
Johana Betancur Escobar HYDROPOWER History ENERGY The hydropower comes from
the utilization of the movement
of water, thanks to the hydrologic cycle
that is in charge of take the water
across the planet; the motors of all this
processes are the gravity and the sun,
they give the sufficient energy to
make this possible. Inside a hydropower plant: FUTURE APPLICATIONS Hydroelectric plants have evolved continuously, initially had a wheel which took advantage of the power that was generated in the rivers to thereby move a wheel power generating energy. Three Gorges Dam Gates on the dam open and gravity pulls the water through the penstock, a pipeline that leads to the turbine. Water builds up pressure as it flows through this pipe. Intake The water strikes and turns the large blades of a turbine, which is attached to a generator above it by way of a shaft. Generators: As the turbine blades turn, so do a series of magnets inside the generator. Giant magnets rotate past copper coils, producing alternating current (AC) by moving electrons. Power lines: Out of every power plant come four wires: the three phases of power being produced simultaneously plus a neutral or ground common to all three. The hydropower is just one source of electricity; other sources include gas-turbine, solar, geothermal, and wind-powered systems. Dam: Most hydropower plants rely on a dam that holds back water, creating a large reservoir. Often, this reservoir is used as a recreational lake. Dam: Most hydropower plants rely on a dam that holds back water, creating a large reservoir. Often, this reservoir is used as a recreational lake. Outflow: Used water is carried through pipelines, called tailraces, and re-enters the river downstream. Transformer: The transformer inside the powerhouse takes the AC and converts it to higher-voltage current. Classification of dams According to its structure Depending on the material There are several ways to classify types of dam, depending on its structure or shape of the material with which it was built or application (uses), in each case should make a good study to select the most appropriate type of dam. Arch and Vault Gravity Arch Gravity Buttress DAMS Concrete Loose materials Use of dams and advantages of the Hydropower BIBLIOGRAPHY Picture take from ¨renewable energy technologies: cost analysis series¨








http://www.hydropower.com.cn/technologies.asp ENVIRONMENTAL
EFFECTS The first plant was built in 1880
in Britain, the hydropower initially produced by the breakthrough that had the electrical generator and water turbine. According to research it is said that this type of energy produces 16% of the world's electricity, countries that currently generate the largest amount of hydropower are China, Canada and the United States. The change of the ecosystems and the species that live on them specific ecosystem.
The stratification.
The supersaturation. In the decade of the 90 large hydropower producers were the United States and Canada. º
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