TIDAL POWER. See TIDAL ENERGY.

TOE. A ton of oil equivalent. The energy released when 1 ton of crude oil is burned. 1 toe = 7.4 barrels of crude oil in primary energy. 1 barrel of oil = 158.9 litres. 1 toe = 1.438 tce. The International Energy Agency expresses its energy balance sheets in toe. Electricity converted into toe is: 1 MWh = 0.086 toe.

TURBINE. In hydroelectric power plants, the turbine transforms water movement into electricity. In wind power installations, the wind turbines or wind generators transform kinetic wind energy into mechanical energy and then into electrical energy.