Siemens Steam Turbines
Flexible, reliable and robust
General Information
- Description
- Output Overview
Siemens offers a comprehensive range of steam turbines from 45 kW to 1,900 MW, with the flexibility to address the specific requirements of your particular application. With over a century of experience and continuous development in steam turbine technology, Siemens has stayed at the forefront of development and is a prime partner for your business.
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Steam Turbine SST-700 (up to 175 MW)
- Description
- Technical Data
- Benefits
- Design Concept
- Package
The SST-700 is a dual casing steam turbine with up to 175 MW power output. It is specially designed for power generation applications. In order to make the best use of large changes in volumetric flow from inlet to outlet, the SST-700 turbine steam expansion is divided into two different modules: one high-pressure turbine (HP) and one low-pressure turbine (LP).
| Power output | up to 175 MW |
| Inlet steam pressure | up to 165 bar / 2,395 psi |
| Inlet steam temperature | up to 585 °C / 1,085 °F |
| Rotational speed | 3,000 to 13,200 rpm |
| Reheat temperature | up to 415 °C / 780 °F |
| Bleed | up to 7, up to 120 bar / 1,740 psi |
| Controlled extraction | pressure: up to 40 bar (a) / 580 psi temperature: up to 415 °C / 780 °F |
| Exhaust steam conditions | back pressure: up to 40 bar (a) / 580 psi condensing: up to 0.6 bar (a) / 8.7 psi district heating: up to 3 bar (a) / 45 psi |
| Exhaust area | 1.7 - 11m² / 18.3 - 118 sq. ft. |
All data are approximate and project-related.
- Compact design
- Easy installation and maintenance
- Wide application range, including reheat applications
- High reliability, availability and efficiency
- Short start up-time
- Proven solution for solar thermal power plants
- Flexible, dual-casing design
- Modular: geared or direct drive HP and LP modules
- Customized steam path, in reheat or non-reheat cycle
- Axial/downward exhaust
In order to make the best use of changes in the volumetric flow from inlet to outlet, the SST-700 turbine is divided into two different modules: a high-pressure turbine (HP) and a low-pressure turbine (LP), operating at different speeds. The two modules are combined to provide the turbine configuration that is most suitable for a specific application. However, each module can also be utilized on its own, e.g. the high-pressure module can be used as a separate back-pressure unit.
Optimum performance is assured by choosing dimensions for each cylinder appropriate to volumetric flow and by using two different and optimized speeds for the HP and LP turbines. Internally controlled process steam extraction provides a constant extraction pressure over a broad range of steam flows, a feature that makes the SST-700 steam turbines both flexible and easy to operate. Bleed extractions are available and can be equipped with external pressure control valves.
With a symmetrical barrel type casing and small dimensions of the hot parts, resulting in low thermal and mechanical inertia, the SST-700 turbine can accept very short start-up times and rapid load changes.
Standard design arrangements for the SST-700 are:
Legend:
| 1. Generator | 5. Gland steam condenser |
| 2. HP turbine | 6. Lube oil unit |
| 3. LP turbine | 7. Hydraulic unit |
| 4. Condenser |
Dimensions:
Length (L) 22 m / 73 ft.*
Width (W)15 m / 50 ft.*
Height (H) 6 m / 20 ft.*
* including condenser
Download
Brochure: Steam Turbines - Product range up to 250 MW
Brochure: SST-700 Industrial Steam Turbines