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Saturday, 27 August 2011

Coal-Fired Power Plant

Coal-Fired Power Plant
Coal-fired units produce electricity by burning coal in a boiler to heat water to produce steam. The steam, at tremendous pressure, flows into a turbine, which spins a generator to produce electricity. The steam is cooled, condensed back into water, and returned to the boiler to start the process over.
For example, the coal-fired boilers at TVA’s Kingston Fossil Plant near Knoxville, Tennessee, heat water to about 1,000 degrees Fahrenheit (540 degrees Celsius) to create steam. The steam is piped to the turbines at pressures of more than 1,800 pounds per square inch (130 kilograms per square centimeter). The turbines are connected to the generators and spin them at 3600 revolutions per minute to make alternating current electricity at 20,000 volts. River water is pumped through tubes in a condenser to cool and condense the steam coming out of the turbines.
The Kingston plant generates about 10 billion kilowatt-hours a year, or enough electricity to supply 700,000 homes. To meet this demand, Kingston burns about 14,000 tons of coal a day, an amount that would fill 140 railroad cars.

1 comment:

Coal said...

The investment into alternative power generating technologies such as nuclear energy may need to be measured against the potential cost when things turn against you as unfortunately happened this year in Japan. The use of thermal coal (steam coal) that is mostly burnt for power generation may be valid for other countries who may not be able to allocate resources and funds to alternative and more greener sources of power. Coal newsletters and coal statistics show developing economies are more likely to increase their investment into & their use of thermal coal & metallurgical coal in coming years because of coal's affordability and ability to quickly meet increasing demands for electricity and steel.