Types of geothermal power plants

Types of geothermal power plants

Power plants operating by dry steam method : It is the most widespread type, and it works by pumping hot steam directly from the hot water reserves located in the ground to the turbine, which rotates the electric generator connected to it and thus generates electrical energy. After the hot steam passes through and circulates to the turbine, the Steam is condensed and thus converted into water, which is returned to the underground via an injection well.

Fumigation power plants : These stations differ from dry steam stations in that instead of steam, hot water is pumped at high pressure directly to the evaporation tank located on the surface of the Earth. The temperature of the evaporation tank is low, as well as its pressure is low, and this decrease in heat and the difference in pressure causes the evaporation of hot water, steam is formed, which is directed towards the turbine to rotate and the electric generator rotates with it. After that, the Steam is cooled and condensed to become water, which is returned to the ground via an injection well.

Dual-circuit power plants : Dual-circuit power plants differ from the previous ones in that steam from underground water does not reach directly to the turbine, but hot water is pumped from underground to a heat exchanger where hot water passes through pipes in a different liquid with a low boiling point (below the boiling temperature of water). The second liquid is converted into steam by the heat of the water in the pipes, and it goes to the turbine, which rotates and the electric generator rotates with it. After that, the water returns to the underground by the injection well, while the steam that rotated the turbine is condensed and returns to the heat exchanger to be used again.

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