Enhanced geothermal systems: 10 Breakthrough Technologies 2024

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Geothermal heat, an abundant and carbon-­free energy source, offers an alternative to fossil fuels that doesn’t vary with the weather or time of day. However, conventional geothermal plants require specific geological conditions—in particular, permeable rocks with water sources.

Because of this, geothermal accounts for less than 1% of global renewables capacity. But an emerging technology could let us exploit even more of the heat beneath our feet. 

Enhanced geothermal systems have been in development since the 1970s. Recent advances show that they could dramatically increase production of renewable energy. Fervo Energy tested one such system last year in Nevada and proved its commercial viability. The company is building another project in Utah, with a goal of providing constant, clean power by 2026.

With enhanced geothermal, companies can access geothermal heat in new locations. Hydraulic fracturing techniques—widely used by the oil and gas industry—are now being used to crack open relatively solid rocks, at depths much greater than existing geothermal wells. Water is then injected into these rocks to generate steam, which subsequently drives turbines to produce electricity. 

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