Question

How can geothermal energy be harnessed to produce electricity?

Answer 1

Hey friend, here is your ans..
Geothermal energy is produced by the heat of Earth's molten interior. This energy is harnessed to generate electricity when water is injected deep underground and returns as steam (or hot water, which is later converted to steam) to drive a turbine on an electric power generator.
Moderate- to low-temperature geothermal resources are also used to heat buildings directly and to provide space heating through district heating systems in which heat is distributed to residences and commercial buildings from a central source.
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Answer 2

The hot steam flowing out of geothermal deposits is used to heat geothermal water that turns the turbines that in turn, spin a generator to produce electricity. This method is the oldest type of power plant, first used in Lardarello, Italy, in 1904. ... The steam is then used to turn the turbines producing electricity.