AAC&U
Summary
In Utah and Nevada, two-mile-deep enhanced geothermal systems have produced electricity. In the eastern U.S., the rocks are about three times less hot at similar depth, which is not economically practical for power generation, but is ideal for heating buildings directly. Cornell University recently drilled a two-mile-deep borehole to assess the feasibility of EGS for direct heat production, but many challenges to deploying this type of system still exist.
The economic potential for direct heat-generating enhanced geothermal systems is on the order of 320 gigawatt-thermal units in the United States, enough to heat about 45 million households. Clean, renewable heat is beneath our feet. The challenge now is to build the infrastructure.
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