A steam turbine uses high-temperature and high-pressure steam to rotate shafts of electric generator.
Cogeneration is simultaneous production of electricity, by gas turbine which runs by combustion of fuel, and by steam turbine which uses the wasted heat from gas turbine.
It is a highly efficient power generation system. Cogeneration plants can reach efficiency ratings higher than 50%.
Environmental impacts can be further reduced by using LNG as fuel, because LNG emits no SOx nor dust when combusted.
A gas turbine, also referred to as "gas turbine engine," is a internal combustion engine fueled either with fuel oil or gas.
The combustion gas drives a turbine to generate electric power.
Due to the high output capacity, gas turbines are used to supply power during peak.