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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Product Information

Steam Turbine SST-900

Description
Technical Data
Benefits
Design Concept
Package

The SST-900 is a single-casing steam turbine with up to 250 MW power output, normally providing direct drive of a 3,000 or 3,600 rpm generator. The SST-900 steam turbine series is designed and manufactured to meet the specific demands of power generation in non-reheat or in combination with HP module for reheat applications in:

Industrial plants
Combined cycle plants
Fossil fuel steam plants
Waste-to-energy plants
District heating plants
Power plants in the oil and gas industry

Technical Data
Power output	up to 250 MW
Inlet steam pressure (with reheat)	up to 165 bar / 2,395 psi
Inlet steam temperature (with reheat)	up to 585 °C / 1,085 °F
Reheat temperature	up tp 580 °C / 1,075 °F
Rotational speed	3,000 to 3,600 rpm, HP up to 13,200 rpm
Bleed	up to 7, up to 60 bar / 870 psi
Controlled extraction (single or double)	pressure: up to 55 bar (a) / 800 psi temperature: up to 480 °C / 895 °F
Exhaust steam conditions	back pressure: up to 16 bar (a) / 230 psi condensing: up to 0.6 bar (a) / 8.5 psi exhaust area: 1.7 - 11 m² - 118 sq. ft.
Exhaust area	1.7 - 11 m² - 118 sq. ft.

All data are approximate and project-related.

Compact plant layout
Wide application range
High reliability, availability and efficiency
Simple foundation, easy installation and maintenance
Short start-up time and quick load changes

Single-casing, horizontally split, direct-drive
Modular, flexible and proven design
Customized steam path
Thermoflexible design
Axial exhaust

The SST-900 turbine is built from a series of proven standard components, each of which contributes to high reliability and availability. Although the turbine components are selected from standardized building blocks, the steam path, extraction/admission location, size and inlet systems are customized to fit the specific requirements of each project.

The SST-900 can be equipped with a single valve or multi-valve inlet as well as with various types of extraction control arrangements. Volutes for even steam distribution to the first inlet stage or nozzle groups around a control stage protect the main turbine casing from very hot inlet steam. A single inlet volume provides optimal performance for combined-cycle sliding pressure operation.

Compactness and ease of installation

The 2-pole direct driven generator, used with the SST-900 steam turbine, is delivered completely assembled, ready to place on the foundation. The entire turbine also leaves our factory completely assembled, minimizing the time and manpower required for field erection work.