In a Fossil Fuel Fired thermal or steam turbine system, fuel is burned in the boiler furnace to turn the water in the boiler into hot steam. The superheated, high pressure steam is then piped to rotate the steam turbine at fixed revolution speed, thus spinning the generator which is connected directly to the turbine shaft. In this way, electricity is produced and adjusted for further transmission.
After driving the turbine, the exhaust steam from the low pressure turbine is passed into the condenser where hot steam is condensed into water to be reused in the boiler.
Fossil Fuel Fired Thermal power plants are outstanding because of their high efficiency and capacity and long service life. Besides, they can burn various kinds of fuel, such as natural gas, oil and lignite. Since they are too time consuming in revving up, thermal facilities usually run continuously all day long to provide base load for the system