An anonymous reader quotes a report from Motherboard: A company that plans to drill deeper into Earth than ever before, creating holes that would extend a record-shattering 12 miles under our planet's surface, has raised a total of $63 million since its launch in 2020. Most recently, Quaise Energy, a startup that aims to revolutionize the geothermal energy market, secured $40 million in series A funding in February, reports Axios. The goal of these super-deep holes is to access a limitless amount of renewable energy from the heat deep inside Earth.
"This funding round brings us closer to providing clean, renewable baseload energy," said Carlos Araque, CEO and co-founder of Quaise Energy, according to BusinessWire. "Our technology allows us to access energy anywhere in the world, at a scale far greater than wind and solar, enabling future generations to thrive in a world powered with abundant clean energy." Geothermal energy has a low profile compared to other renewable energy sources such as solar, wind, and hydro, but Quaise believes it is "at the core of an energy-independent world," according to the company's website. This form of energy is among the oldest power sources harnessed by humans, but it only accounts for about 0.4 percent of net energy production in the United States, which is the world's biggest geothermal producer.
Quaise, which is a spinoff from the Massachusetts Institute of Technology (MIT), intends to pioneer this technology using vacuum tubes known as gyrotrons that shoot millimeter-wave light beams, powered by electrons in a strong magnetic field. Using these devices, the company plans to burn almost twice as far into Earth as the deepest holes ever made, such as Russia's Kola Superdeep Borehole or Qatar's Al Shaheen oil well, both of which extend for about 7.5 miles. Gyrotrons are powerful enough to heat plasma in nuclear fusion experiments, making them an ideal tool to probe unprecedented depths of some 12 miles, where subterranean rocks roil at temperatures of about 500C (930F). Water pumped into this searing environment would instantly vaporize as steam that could be efficiently converted to electricity. Araque and his team at Quaise plan to funnel their seed money into prototype technologies within the next few years. By 2028, the company aspires to retrofit coal-fueled power plants into geothermal energy hotspots, reports ScienceAlert. The process of drilling out these super-deep holes would take a few months, but once the setup is complete, they could provide limitless energy to a region for up to a century, according to Araque.
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