Industrial Power
SST-111 Steam Turbine
Up to 12 MW
www.siemens.com/energy
SST-111 Steam Turbine
The SST-111 is a multi-stage steam turbine with an integrated gearbox and is designed for the output range from
3 to 12 MW. The gearbox, designed for multi-casing
design approach permits up to two controlled extractions
with operation in various steam supply systems, as well as
the possibility of including a reheat system to optimize
efficiency.
The SST-111 embodies both efficiency and availability.
The tried-and-true design concept of the SST-110 is characterized by a space-saving configuration, quick startup
and cost-effective operation combined with the fluid
mechanics design used in the Siemens multi-stage
turbines.
The machine’s robust construction and cantilever rotor
bearing result in fast start-up capability, enabling the
machine to start up and achieve maximum output within
seconds – even in cold condition.
Operation in the saturated steam regime enables utilization of extremely low residual steam flows, thereby generating power with minimal technical effort.
As with all pre-designed steam turbines, the SST-111 is
de­livered as a complete machine, including the generator,
control and monitoring equipment as well as the necessary auxiliary and supporting systems.
The SST-111 is suitable for use in decentralized power
supply applications. Examples of customers who could
benefit from it include municipal utilities and energy­
intensive industrial plants, which generate their own
power for production processes. Because of its flexible
machine design, the turbine is suitable for many applications, such as:
biomass power plants
waste and refuse incineration plants
small combined-cycle power plants (use of gas-turbine
waste heat)
utilization of waste heat in industry
combined heat and power
concentrated solar power plants
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Advantages of the SST-111
Unique cost-benefit ratio thanks to improved efficiency
– High efficiency / high power yield
–O
ptimum speed flexibility for high efficiency,
optimum efficiency in the part-load range
– Attractive price
Flexibility
– Compact design, simple installation, small footprint
– Reheat system, controlled extraction and injection
are possible
– Fast start-up capability, high availability, high
­efficiency at varying steam parameters (biomass)
– Simple adaptation to changed steam parameters
(repowering etc.)
Proven “low-risk” design
– Based on the same tried-and-true concept of
the SST-110
– Proven modular design parts and our own
gearboxes
– Quick service response times
– Single-contractor machines, one contact person
Technical Data
Output of up to 12 MW
Main steam pressure up to 131 bar(a)
Main steam temperature up to 530° C
Exhaust steam pressure: Condensation down
to 0.06 bar(a) maximum
Typical Dimensions
Length: approximately 8 m, including generator
Width: 4.0 m
Height: 4.0 m
Features
Fast start-up without preheating
Saturated steam operation
Condensing design
Package design
Oil supply system integrated into the
­baseframe
Nozzle-group control option available
Compact configuration
Pressure-controlled extraction and/or injection
High pressure/low pressure arrangement
ATEX design available as an option
Turbine Design
The turbine casings are bolted to the bearing housing
kinematically so as to maintain centricity and permit
­unrestrained thermal expansion. The vertical casing joint
facilitates access to the impeller. The admission valve
with combined control and stop-valve function is opened
or closed by a flanged-on, pneumatically-controlled
servomotor.
Gearbox
The integrated gearbox is manufactured in-house and is
tailored to the turbine design. The gearbox casing contains
the plain bearings that are supplied with pressurized lube
oil and the gear wheels. The ground gear teeth, together
with optimization of the contact pattern during installation, ensure smooth running behavior at low noise levels.
We are thus able to achieve short lead times and optimum
matching to both the turbine and the customer’s operating mode.
Oil System
The oil supply system is integrated into the baseframe
and consists of an electric oil pump for startup, a mechanically-driven main oil pump, a replaceable filter and an
air-cooled oil cooler.
Baseframe
The SST-111 steam turbine is delivered completely
­assembled as a pre-tested package unit. The turbine,
­gearbox and oil supply system are mounted on a
shared baseframe.
The compact, integrated configuration permits outputs
of up to 12 MW under limited spatial conditions.
Comprehensive Service
Siemens offers an extensive portfolio of service solutions
and products for the SST-111 to ensure efficient plant
operation. This service encompasses:
Installation and commissioning
Training of customer personnel
Assessment of the condition, maintenance, inspection
and overhaul
Modification, upgrading and optimization
Provision of spare parts
Condition diagnostics
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Published by and copyright © 2012:
Siemens AG
Energy Sector
Freyeslebenstrasse 1
91058 Erlangen, Germany
Siemens AG
Energy Sector
Oil & Gas Division
Wolfgang-Reuter-Platz
47053 Duisburg, Germany
Siemens Energy Inc.
10730 Telge Road
Houston, Texas 77095, USA
Siemens Turbomachinery Equipment GmbH
Heßheimer Str. 2
67227 Frankenthal (Pfalz)
For more information, contact our
Customer Support Center.
Phone: +45 49 21 14 00
Fax: +45 49 21 52 25
(Charges depending on provider)
E-mail: support.energy@Siemens.com
www.siemens.com/energy
Oil & Gas Division
Order No. E50001-G410-A118-X-4A00
Dispo 34806, c4bs 7479, bdk 120061, P WS 0512
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Trademarks mentioned in this document are the property of
Siemens AG, its affiliates, or their respective owners.
Subject to change without prior notice.
The information in this document contains general descriptions of
the technical options available, which may not apply in all cases.
The required technical options should therefore be specified in the
contract.