Geothermal power plant in Cornwall
To pump water underground, and get back steam, which will rotate a turbine to generate energy: British scientists have proven the consistency of this concept. A geothermal circulating power plant begins operation in Cornwall. Engineers are calling this technology a pretty big step towards fossil fuel-free energy.
The planet itself heats the water
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Hazel Farndale, Geologist:
“This is a historic moment: we got the first steam out of the ground and showed it to the world. This whole week has been historic. Getting steam from the depths of the earth is a concept that is not the easiest to understand, but we have proven that it is possible.”
Luke Hanrahan, Euronews:
“Today, the deepest wells in the UK are located here: they go deep into the earth for more than five kilometers, through radioactive granite, which generates heat. Soon they will be able to receive electricity here.”
Water is pumped to a depth of many kilometers; there it heats up to a temperature of 180 degrees; but because of the tremendous pressure, it turns into steam only on the surface.
Hazel Farndale, Geologist:
“We've come to a natural fracture area. There can be huge volumes of fluid circulating, and that fluid can be brought up through the borehole. As the pressure drops closer to the surface, the fluid turns into steam – and we use it to turn the turbine.”
Energy in such a cycle is spent only on the circulation of water – in and out of the fault; heating of the coolant is produced by the bowels of the planet. The authors of the project suggest that in the UK alone, similar power plants can be built with a total electrical capacity of 200 gigawatts.
