Look up an image:
Explore by theme astronomie

production of electricity from geothermal energy click to hear : production of electricity from geothermal energy

Hot water contained in the ground near a volcano, geyser or thermal source is piped to the surface by drilling to extract steam and produce electricity.
production of electricity from geothermal energy image
achat d'image achat d'image

See production of electricity from geothermal energy in : french | spanish
generator production well geothermal field confined aquifer lower confining bed magma chamber upper confining bed separator turbine injection well steam water water-steam mix high-tension electricity transmission voltage increase cooling tower condenser

generator click to hear : generator

Turbine-powered rotating machine that converts mechanical energy into electric energy to direct it toward a transmission network.

production well click to hear : production well

Borehole dug into the ground to allow the hot water contained in the aquifer to be pumped to produce electricity.

geothermal field click to hear : geothermal field

Area of Earth’s crust where a pocket of hot confined water is close enough to the surface to be exploited.

confined aquifer click to hear : confined aquifer

Layer of porous sedimentary rock between two impermeable layers where water accumulates at a temperature between 150°C and 400°C.

lower confining bed click to hear : lower confining bed

Layer of impermeable rock that transmits heat from the magma chamber to the aquifer.

magma chamber click to hear : magma chamber

Pocket of magma (molten rock emerging from Earth’s crust) that constitutes a heat source; it transmits its thermal energy to water.

upper confining bed click to hear : upper confining bed

Layer of impermeable rock that covers the confined aquifer.

separator click to hear : separator

Device that separates water from steam, which it recovers to operate the turbine; the water is reinjected into the aquifer.

turbine click to hear : turbine

Steam-powered machine whose wheel transmits mechanical energy to the generator and causes it to rotate.

injection well click to hear : injection well

Borehole that is drilled into the ground to return water to the aquifer, where it is reheated after its heat has been extracted.

steam click to hear : steam

Gaseous state of water; steam pressure operates the turbine.

water click to hear : water

Liquid made up of hydrogen and oxygen that becomes steam at 100°C; the water transfers Earth’s internal heat.

water-steam mix click to hear : water-steam mix

Hot water extracted from the aquifer; as it rises to the surface, it is partially turned into steam.

high-tension electricity transmission click to hear : high-tension electricity transmission

Using high-voltage lines to transmit electricity over long distances reduces the strength of the current and, as a result, energy losses.

voltage increase click to hear : voltage increase

At the outlet end of the power plant, the transformer increases the voltage; this reduces energy losses during transmission over long distances.

cooling tower click to hear : cooling tower

Device that cools the condenser’s hot water on contact with the air; some of the water evaporates and the rest is reinjected into the condenser and the aquifer.

condenser click to hear : condenser

Circuit that cools the steam from the turbine and condenses it into water.