Combustion Advanced can annular combustion system Rotor Proven rotor design with internal cooling air passages for world-class fast (cold) start and hot restart capability Easy rotor de-stacking on site due to disc assembly with Hirth serration and central tie rod High cycling capability due to fully internally air-cooled turbine section Variable inlet guide vanes and three stages of fast acting variable-pitch guide vanes (VGV) for improved part load efficiency and high load transients 3D four stage turbine with advanced materials and thermal barrier coating All rotating compressor blades replaceable without rotor lift or rotor de-stacking Bearings Active clearance control with Hydraulic Clearance Optimization (HCO) for reduced degradation and clearance losses High combined cycle efficiency of 62% – reliable, flexible, and proven in commercial operation Flexibility siemens-energy.com/gasturbines Siemens Energy is a trademark licensed by Siemens AG. Shorter outages: All turbine vanes and blades replace ble ithout rotor lift; vane 1, blade 1 & 4  a w replaceable without cover lift High efficiency due to evolutionary 3