Siemens - Model SGT5-9000HL (50 Hz) - Heavy-Duty Gas Turbine
From Power and Heat Generation - Gas Turbines -
Simple cycle output (ISO), 593 MW(e), Combined cycle efficiency: > 64%, Derived from proven H-class technology. The next generation of advanced air-cooled gas turbines. Our HL-class gas turbines are paving the way to the next level of efficiency and performance. Derived from proven H-class technology in an evolutionary development step, the next generation of advanced air-cooled gas turbines uses a series of new, but already tested technologies like super-efficient internal cooling features for blades or vanes and an advanced combustion system to increase firing temperature.
Highlights of the SGT5-9000HL
Fast start-up capability
The gas turbine is capable of world-class fast cold starts and hot re-starts due to the light and stiff rotor with internal cooling air passages and free thermal expansion of rotor and casing parts during transients. Hydraulic Clearance Optimization (HCO), an active clearance control, ensures robustness and low turbine degradation at start-up. GT ramp-up rate 85 MW/min.
Advanced combustion system for high efficiency (ACE)
The advanced can-annular combustion system with dual fuel capability allows for higher firing temperatures and more operational flexibility. 25 premix burners improve the fuel/oxygen mixing. The ACE combustion system allows for GT turn-down to 21% minimum environmental load.
Advanced coatings
All turbine blades and vanes are equipped with an innovative multi-layer thermal barrier coating. This leads to higher combined cycle efficiency due to less cooling air consumption and reduced operational costs due to higher blade robustness.
Minimized maintenance costs and outage times
The HL-class has been designed to minimize outage times. Rotor de-stacking can easily be done on site thanks to the Hirth-serrated disc assembly. All rotating compressor and turbine blades can be replaced without rotor lift or rotor de-stacking. Turbine blade 1 and turbine blade 4 are removable without cover lift. With 33kEBH service intervals the service concept is very competitive.
Easy plant integration
Due to proven and validated package and plant concepts the HL-class can easily be integrated in our power plants for simple cycle or combined cycle operation. This enables fast project execution. More than 50,0000 hours are saved on site due to modularized design and pre-engineered solutions.
Derived from proven H-class technology
The new HL-class is based on the reliable engine architecture of the SGT-8000H series with design features that have proved reliability in operation for years:
- Hydraulic Clearance Optimization (HCO)
- Single tie bolt with Hirth serration
- 4-stage air-cooled turbine
- Can-annular combustion system
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