Different Ways to Make Electricity

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Electricity generation is a two-step process that involves producing kinetic energy (using a turbine) and converting that kinetic energy into electricity. Kinetic energy is produced when an object is in motion. It is directly proportional to the speed of the moving body – the faster it moves, greater will be the resulting kinetic energy. Electricity is produced when kinetic energy turns copper coils (or wire) within the turbine.

Steam

  • A steam power plant (or generator) produces electricity by burning fuels, including biomass, coal or petroleum. Steam generated from the process is fed into a turbine. The copper armature (wire) in the generator turns with the rotation of the turbine, producing an electric current. An example of a steam power plant is the Big Bend Power Station located in Tampa, Florida.

Water

  • Electricity that is generated from water is called hydroelectricity. Falling water rotate the blades of a hydroelectric turbine, which in turn moves the copper armature inside the electric generator to produce electricity. An example of a hydroelectric power plant is the Great Hoover Dam (located near Las Vegas, U.S.). It has a total of 19 turbines that produce enough electricity to serve more than 1.3 million people annually.

Wind

  • A wind power plant rotates the blades of a turbine, which move the copper armature (that lies within the generator) to generate electricity. Windmills have been utilized in the past to rotate the wheels of attached mills. Modern windmills turn mechanical energy (generated from movement) into electrical energy. An example of a wind-powered electricity plant is the 107 Mega Watt (MW) wind farm located near Lake Benton, Minnesota.

Solar Power

  • Photovoltaic cells utilize the energy of the sunlight to produce electricity. Direct current (DC) is generated from stationary solar panels (which are made up of photovoltaic cells) and is commonly used for local applications, including running small-scale irrigation pumps or to charge battery-powered devices. Commercial scale solar power plants are steadily gaining popularity with the increase in the price of fossil fuels. They function by trapping solar energy through large reflectors. The trapped energy is then directed onto receivers that use various technologies to generate electricity by powering gas or steam turbines. The Nellis Power Plant is the largest solar power plant in North America. It is located in the Nellis Air Force Base in Clark County, Nevada, near Las Vegas. The plant is made up of more than 70,000 photovoltaic solar panels and its maximum electrical capacity is estimated at 13 mega watts of alternating current (13 MW AC).

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  • Photo Credit dam image by michael langley from Fotolia.com
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