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uniting nemains uncertain But drilling a well can cost $250,00Q-and prove fruitless. If the water is too salty, the high mineral content means its steam can damage turbines even though corrosion-resistant materials are used and the brine and steam are separated in a centrifuge.
A successful well must deliver steam at a constant pressure and temperature for decades. SQme geothermal wells have shown slowly dropping pressures and cooler temperatures within eight years.
The proposed recycling method would not depend on underground water supplies for steam. And hot, dry rock is accessible in more locations than natural steam.
Italy pioneered geothermal power in 1904, and generators at Larderello are still in operation. The Geysers plant has been furnishing electricity since 1960; Japan and the Soviet Union started operating geothermal plants in 1965.
Geothermal heat does more I than drive generators. Homes in Iceland have been warmed by natural steam for more than 40 years. Thermal wells in New Zealand provide steam to make pulp at a paper mill, heat greehheuses on farms, kiln-dry lumber, mold plastics, aul.Sieainiiea,n_,cirsA
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