The Combined Cycle power plant is a combination of a fuel- fired turbine with a Heat Recovery Steam Generator (HRSG) and a steam powered turbine. Depending on the power requirements at the time, the combined cycle plant may operate only the fired turbine and divert the exhaust. However, this is a substantial loss of efficiency. Large fired turbines (Simple Cycle) are in the low 30% efficiency range, while combined cycle plants can exceed 60% efficiency. The combined-cycle unit combines the Rankine (steam turbine) and Brayton (gas turbine) thermodynamic cycles by using heat recovery boilers to capture the energy in the gas turbine exhaust gases for steam production to supply a steam turbine. Process steam can also be provided for industrial purposes. In the first cycle, fuel is burned and the resulting combustion gases power two turbine-generators to produce electricity. Hot exhaust normally lost during this process is captured and routed through the two heat-recovery steam generators (HRSG). These units boil water to create steam, which spins an additional turbine-generator and produces more electricity. Finally, the steam is discharged into a condenser, which returns the steam to its liquid state for recycling.