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Ormat Technologies Inc., the U.S. Department of Energy and GeothermEx have produced an additional 1.7 MW from an Enhanced Geothermal System (EGS) project inside an existing well field in the U.S. This is the first EGS project to be connected to the power grid.

Using innovative subsurface technologies, research and development teams stimulated an existing sub-commercial injection well resulting in a 38% increase in power output from brine at Ormat's Desert Peak 2 geothermal power plant in the Brady complex in Churchill County, Nev.

By expanding existing hydrothermal fractures deep within the Earth's crust, EGS technology enhances the permeability of under-performing wells, making it possible to extract additional heat from a reservoir's rocks and inject geothermal fluid at higher flow rates. Ormat says.

"This research and development project was conducted under a stringent induced seismicity protocol developed by LBNL and the Department of Energy," says Lucien Bronicki, founder and chief technology officer for Ormat. "We achieved an increased injection rate up to 1,600 gallons per minute without consuming or discharging water at the surface and using only existing geothermal brine returned to the original aquifer."

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