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Combined Cycles
CFE CCC San Lorenzo
CFE Chihuahua II
Power Generation
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SCC6-5000F Application Overview
Siemens Combined Cycle Applications
Siemens has more than three decades of experience in
combined cycle plant design. Our first combined cycle
experience came in the early 1960s with the installation of
the West Texas Utilities plant using a W301, a 30 MW gas
turbine. The second generation of combined cycle plants
were the PACE (Power at Combined Efficiencies) plants
introduced in the early 1970s. The PACE plants used an
earlier W501 model, the W501B, as their prime mover and
were pre-engineered, standardized combined cycle plants.
The Siemens Combined Cycle (SCC) SCC6-5000F plant
design (as shown in Figure 1) is built on the strong
knowledge base derived from these previous design efforts.
With 1x1 (~293 MW), 2x1 (~591 MW) and 3x1 (~885 MW)
configurations, the SCC6-5000F family of combined cycle
plants is sized to meet the various base and cyclic load
requirements of utilities, independent power producers
(IPPs) and merchant plan operators. The development of
these designs allows for cost-effective plants that require
minimal project specific engineering.
Power Generation
Copyright © Siemens AG 2010. All rights reserved.
SCC6-5000F General Description
Combined cycle plants can be made up of
various combinations of gas turbines HRSGs
and steam turbines. The scope of supply can
be a SGT6-PAC 5000F package, SCC6-PAC
5000F power island or SCC6-5000F turnkey
plant.
A typical 2x1 combined cycle power plant
consists of two SGT6-5000F gas turbines
each with a dedicated HRSG that supplies
steam to a shared steam turbine. The gas
turbines will primarily burn natural gas with
optional provisions to burns liquid fuel as a
backup. Each gas turbine will be coupled
with a three-pressure reheat HRSG, which
will generate steam to operate the steam
turbine. Generators attached to the two gas
turbines and the steam turbine will supply
electrical power to the grid.
Power Generation
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Major Equipment
A typical 2x1 turnkey combined cycle plant
consists of the following major equipment:
ƒTwo SGT6-5000F gas turbines with air-cooled
generators
ƒTwo three-pressure level reheat HRSGs with
stacks (fired as an option)
ƒOne multi-cylinder reheat condensing steam
turbine with air-cooled generator
ƒOne water-cooled condenser using a forceddraft cooling tower
ƒOne integrated plant distribution control system
ƒBalance of plant (BOP) equipment consisting of
pumps, transformers, power electrics, etc.
ƒHV switchyard.
Power Generation
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SCC6-5000F 1x1 Combined Cycle
Plant General Arrangement Drawing
Power Generation
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SCC6-5000F 2x1 Combined Cycle
Plant General Arrangement Drawing
Power Generation
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SCC6-5000F Turnkey Combined
Cycle Plant Performance
Power Generation
Copyright © Siemens AG 2010. All rights reserved.
SCC6-5000F Combined Cycle
Performance
Power Generation
Copyright © Siemens AG 2010. All rights reserved.
Cogeneration Plants
Power Generation
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Gas Turbine in Cogeneration
12% Losses
Introduction to Siemens Industrial
Turbine
Cogeneration Principles
Cogeneration Solutions
Cogeneration Benefits
Market Conditions in Mexico
Case Study
100% Fuel
Power Generation
Summary
Copyright © Siemens AG 2010. All rights reserved.
Typical Industries Suitable for
Cogeneration
Cogeneration solutions for:
Industries
Power Producers
• Introduction to Siemens Industrial Turbine
• Utilities
•Chemicals and Petrochemicals
•IPPs
•Pulp & paper
•Municipal CHP
•Food & beverage
•Sugar
•Automotive
•Metalworking
•Mining
•Cement
•Wood Procession
•Textiles
Power Generation
Copyright © Siemens AG 2010. All rights reserved.
Typical Industrial Cogeneration
Plant
SIEMENS SGT-300 gas turbine with Heat Recovery Steam Generator, producing power and process steam
for a Paper Mill.
¾Electric Output 7.9 MW
¾Process Steam 22t/h
Power Generation
Copyright © Siemens AG 2010. All rights reserved.
Cogeneration Benefits
Reduced Energy Cost
Higher fuel utilization and efficiencies gives energy savings
Improved Electric Reliability
Less instantaneous and prolonged outages plus better power quality
Improved Enviromental Quality
Lower “green house gases” and NOx emissions.
Power Generation
Copyright © Siemens AG 2010. All rights reserved.
Summary Industrial Cogeneration
• Some industries focus on reliable power supply only by installing peaking units, which is only a partial
solution, missing the cogeneration benefit.
• Process energy intensive industries are upgrading their energy plants with cogeneration solutions to
benefit from higher fuel utilization factor.
• Beside demand for high reliability, price of electricity and natural gas are justifying investment in
industrial cogeneration solutions.
• Participating in CO
emissions trading will future more improve the economical benefits with
cogeneration and decrease industries energy cost.
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Power Generation
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THANKS FOR YOUR ATTENTION
Power Generation
Copyright © Siemens AG 2010. All rights reserved.