Steam turbine SST-5000

for power generation

A steam turbine with short start-up times and variable start-up modes to ensure grid stability Siemens Energy Steam Turbines of the SST-5000 series are operated in combined cycle power plants (CCPP) and in steam power plants (SPP). The SST-5000 steam turbine combined with a gas turbine, is able to achieve a net plant efficiency of more than 64 percent in combined cycle applications. •Efficiency: CCPP – 61.5% (CCPP) SPP – 43% for subcritical variant, 45% for supercritical variant •Frequency 50 or 60 Hz •Main steam conditions: CCPP – Inlet pressure up to 177 bar / up to 2,567 psi Inlet temperature up to 600 °C / up to 1,112 ° F SPP – Inlet pressure up to 260 bar / up to 3,770 psi Inlet temperature up to 600 °C / up to 1,112 ° F •Reheat steam conditions: CCPP: 600 °C / 1,112 °F SPP: 610°C / 1,130°C •Last stage blade length: 50 Hz – 66 cm to 142 cm / 26 inches to 56 inches 60 Hz – 66 cm to 95 cm / 26 inches to 38 inches