Word: cappetti
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...swath of central Tuscany is not bathing in nostalgia. It continues to produce 10% of the world's geothermal power - about 4.8 billion kW-h per year - while one-quarter of the entire Tuscan region's electricity comes from local steam energy production, feeding around a million households. Guido Cappetti, who heads the geothermal division for Enel, Italy's giant energy provider, puts it plainly: "Larderello is like a permanently unexploded volcano." The natural - and unique - abundance of hot liquids at relatively shallow depths provides a steady and frighteningly powerful torrent of steam to the surface. This steam, which hits...
...geothermal. Experts for many years have been working in Soultz-sous-Forêts, France on something called Hot-Dry Rock. This process aims to simulate natural geothermal wells by strategically fracturing parts of hot subterranean rock formations to form artificial basins where water can be injected. Says Cappetti: "This is the dream. Then there would be no limit." Experiments over the past two years have extended drilling to a depth of 5,000 meters, but a system for converting the manufactured steam into electricity at an economically feasible rate is considered at least a decade away. In the meantime...
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