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One of the first metano gas station as fuel for automobiles in Fornovo di Taro Italy 1936, Manlio Magini’s book, I’ Italia e il petrolio tra storia e cronologia.
Fig 1. GTDS US Dept Energy.
2. Flash steam plants (GTFS). which pull deep, high-pressure hot water into lower-pressure tanks and use the resulting flashed steam to drive turbines
Fig2. GTFS US Dept Energy
3. Binary cycle plant (GTBC). Which pass moderately hot geothermal water by a secondary fluid with a much lower boiling point than water. This causes the secondary fluid to flash to vapor, which then drives the turbines.
Fig3. GTBC US Dept Energy