GE, one of the world’s leaders in the design, development and application of steam turbine technology, introduces the 109D-14 Steam Turbine. It represents GE’s newest evolution of enhanced technology. Uniquely engineered for the FlexEfficiency* 50 Combined Cycle Power Plant, the
109D-14 Steam Turbine delivers a new level of performance and efficiency with enhanced operational flexibility and improved ease of maintenance.
A World-Class Standard of Efficiency and Flexibility
Integrated into the single-shaft FlexEfficiency 50 plant configuration, rated at 180MW, the advanced 109D-14 Steam Turbine is a three casing design featuring a high-pressure (HP) section, intermediate-pressure (IP) section and double flow, low-pressure (LP) section. This design configuration enables very effective management of clearances to deliver a high power density (HPD) solution and outstanding overall steam turbine efficiency greater than 40 percent.
The integrated clutch provides further enhanced operating flexibility in the FlexEfficiency 50 plant power train enabling ~85 percent load attainment in less than twenty minutes under hot start conditions.
Advances in turbine maintainability and detectability, such as bearings external to the LP hood, adjustable stationary nozzles with the rotor in place and improved turbine monitoring sensors, enable one of the most effective turbine maintenance and shortest outage durations possible.
On run-down, this integrated clutch enables earlier access to the gas turbine, with the steam turbine still on, turning gear for cool-down, thereby, reducing the gas turbine maintenance cycle by approximately two days.
109D-14 Steam Turbine Highlights
3-section advanced steam turbine architecture
- Improved clearance and sealing control
- High efficiency configuration
High Efficiency Advanced Technology (HEAT*) proven high performance steam-path
- Builds on proven technology in axial flow steam turbines
- Increases overall efficiency for higher output and lower back pressure
Drum rotor construction with blinglet nozzles compared to previous configurations
- Advanced leakage management
- Improved aerodynamics
- Enhanced overall steam turbine performance
Integrated self-synchronizing clutch in front standard
- Provides plant operational flexibility compared to previous configurations
Latest generation, proven 1,060mm and 850mm last stage buckets
- Advanced bucket aerodynamics and dovetail configuration
Common LP architecture for cooling tower and air-cooled condenser applications
- Single side exhaust LP
- Common plant shaft line, regardless of plant cooling configuration
- Enables standard plant arrangement for reduced overall foundation and plant construction costs compared to previous configurations
- Facilitates more efficient balance of plant maintenance compared to previous configurations