Most power plants use steam
to generate electricity. Many power plants still use fossil fuels to boil water
The steam rotates a
turbine which activates a generator in order to produce electricity.
Geothermal power plants,
however, use steam produced from reservoirs of hot water found a couple of
miles or more below the Earth's surface.
There are three types of
geothermal power plants: dry steam, flash steam, and binary
Dry steam power plants
draw from underground resources of steam. The steam is piped directly from
underground wells to the power plant, where it is directed into a
turbine/generator unit to generate electricity.