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How Do We Get Useful Energy From Hydroelectricity ?

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Introduction

How Do We Get Useful Energy From Hydroelectricity ? * Flowing water creates energy that can be captured and turned into electricity. * The most common type of hydroelectric power plant uses a dam on a river to store water in a reservoir. Water released from the reservoir flows through a turbine, spinning it, which in turn activates a generator to produce electricity. * Hydroelectric power doesn't necessarily require a large damn. Some hydroelectric just use a small canal to channel the river water through a turbine. * Another type of hydroelectric power plant- called a pumped storage plant- can even store power. The power is sent from a power grid into the electric generators. The generators then spin the turbines backward, which causes the turbines to pump water from a river or lower reservoir to an upper reservoir, where the power is stored. ...read more.

Middle

are all needed for coal-fired stations * Hydroelectric plants are generally less expensive to run than other generating plants Disadvantages of Hydroelectricity * The construction of hydroelectric plants is expensive * One cannot build hydroelectric plants just anywhere: they are site specific * Hydroelectric plants can have a negative effect on river flow and water supply * The construction of hydroelectric plants usually means that areas of land will be flooded. People and/or animals may lose their homes What Is Hydroelectricity Used For? * Electricity * Moving water is a responsible for lighting entire cities, even countries * Accounts for 15% of the world's (2% UK) electricity * Power plants convert kinetic energy in falling water to electricity * The energy in flowing water is from the sun, and constantly being renewed. ...read more.

Conclusion

devices that will produce electricity * According to NREL (National Renewable Energy Laboratory), the most common hydroelectric power source is currently designed to use a dam on a river to block and store the water in a reservoir. When the water is released, it flows through a turbine device, which produces enough wattage to activate a generator, and in turn produce electrical power * There are several other types of hydroelectric power plants, such as a "pumped storage plant," which even has the capabilities of retaining power and storing it for periods of time Factors Affecting Location of HEP plant * Amount of precipitation in an area * Not be suitable in south east England due to less precipitation therefore not very efficient * Suitable in the north due to more precipitation. * Geology of the area http://www.nrel.gov/clean_energy/hydroelectric_power.html http://www.energex.com.au/switched_on/project_info/electricity_production_other_advantages.html#HYDRO http://www.altenergy.org/2/renewables/hydroelectric http://www.iclei.org/efacts/hydroele.htm ...read more.

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