Combined cycle cogeneration plant of 80 MW, with two 32.2 MW gas turbines (at 15ºC and on-site conditions) and one steam backpressure turbine (16.3 MW maximum output). Associated with each gas turbine, two HRSG with natural gas after burner were installed. They produced steam at two pressure levels (on average process demand and for each generator): 49.26 t/h at 82.6 bar(a), 510ºC and 8.88 t/h at 4.8 bar(a) with a gas consumption in the after burner of 8.55 MW.