Most combined-cycle power plants have duct burners to combust turbine exhaust gases

Most combined-cycle power plants in the United States have duct burners that help them make additional use of combustion turbine exhaust gases. Combined-cycle power plants are the most prevalent technology used to generate electricity in the United States, and of the 278 gigawatts (GW) of combined-cycle power plants, about 75% (208 GW) have duct burners located between the combustion and steam turbine components.