Deep Geothermal — One Renewable Energy Source To Rule Them All?
, which varies from 1000º C to 3700º C. Blast a passageway to the mantle, shoot some water down the hole and bazanga! Instant, high pressure steam from a virtually inexhaustible source that could power all of humanity’s energy needs for millions of years. Are you excited yet?This new technology isn’t here yet, but it’s not as far away as you might think.
“That’s something [the DOE] is particularly interested in, because they want to address the challenges posed by material removal over those greater lengths — in other words, can we show we’re fully flushing out the rock vapors?” Houde explains. “We believe the 100-to-1 test also gives us the confidence to go out and mobilize a prototype gyrotron drilling rig in the field for the first field demonstrations.
The company plans to begin harvesting energy from pilot geothermal wells that reach rock temperatures at up to 500 C by 2026. From there, the team hopes to begin re-purposing coal and natural gas generating plants using its system. “We believe, if we can drill down to 20 kilometers, we can access these super-hot temperatures in greater than 90 percent of locations across the globe,” Houde says.
“At these high temperatures [we’re accessing], we’re producing steam very close to, if not exceeding, the temperature that today’s coal and gas fired power plants operate at,” Houde says. “So, we can go to existing power plants and say, ‘We can replace 95 to 100 percent of your coal use by developing a geothermal field and producing steam from the Earth, at the same temperature you’re burning coal to run your turbine, directly replacing carbon emissions.
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