Combined Cycle Power Plants
General Information
- Description
- Benefits
As in simple cycle applications the gas turbine is the main drive for power generation. To improve overall efficiency, exhaust heat from the gas turbine is used to produce steam for the generation of additional electricity by a steam turbine.
Reference Power Plants for Combined Cycle Application
Our Siemens combined cycle (SCC®) reference power plants (RPP) provide flexibility for easy selection of options to meet specific site and customer needs. This, together with a pre-designed balance of plant, results in short project lead times. It provides an optimum balance between capital cost, plant performance, and operational and maintenance considerations. Pre-engineered modular options have been developed to further address individual needs, as well as life-cycle cost enhancements.
- High efficiency
- Superior reliability and availability
- Low life-cycle costs
- Optimized profitability
- Rapid implementation
- Environmental compatibility
Our Portfolio (6)
Power Plant SCC5-4000F 1S
- Description
- Benefits
- References
Our SCC5-4000F 1S reference power plant (RPP) is available in two main variants. These are characterized by the implementation of two different Siemens steam turbines:
- The SST5-3000 – a single-flow axial exhaust low-pressure steam turbine providing best economic benefits at medium to high condenser backpressure.
- The SST5-5000 – a two-flow low-pressure steam turbine with enlarged exhaust cross section, which makes it the choice for low condenser backpressure.
Main Components
The SCC5-4000F 1S RPP is designed around advanced, proven and reliable Siemens equipment, including:
- a Siemens gas turbine (SGT ® ): SGT5-4000F
- a Siemens steam turbine (SST ® ): SST5-3000 or SST5-5000
- a Siemens hydrogen-cooled generator (SGen ® ): SGen5-2000H
- a Siemens power plant automation system (SPPA ® ): SPPA-T3000
- a cooling tower or an air-cooled condenser
The gas turbine, steam turbine and generator are arranged on a single shaft. A synchronous self-shifting (SSS) clutch is installed between the generator and steam turbine. This provides high operating flexibility and reliability.
Performance Figures and Boundary Conditions
| SST5-3000 | SST5-5000 | |
|---|---|---|
| Efficiency: | 58.4% | 58.9% |
| Capacity: | 424 MW | 434 MW |
| Design point: | 15°C | 10°C |
| Cooling: | Cooling tower | Once-through cooling |
The combination of world-class gas and steam turbine and generator technologies with trendsetting power plant system integration results in a highly efficient plant that provides reliable low-cost electricity. The base design of the SCC5-4000F 1S reference plant provides an optimum balance between capital cost, plant performance, and operational and maintenance considerations. Pre-engineered modular options have been developed to further address individual needs. Plant exhaust emissions are minimized by the proven Siemens dry low-NO x hybrid burner ring (HBR) combustion system.
SCC5-4000F 1S (SST5-3000)
