Solar Augmented Steam Cycle EPRI Study Why Solar Integration with - - PowerPoint PPT Presentation

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Solar Augmented Steam Cycle – EPRI Study

• Why Solar Integration with Combined Cycle (CC) ??

– Many CC Plants designed with natural gas duct burning capability – Duct burners only employed during high energy price periods – Hence Steam Turbine capacity for duct burning sits idle much of the time. – Examples

• Dynegy Arlington Valley Duct Burner capacity ~ 80 Mw
• Dynegy Griffith Duct Burner capacity ~ 120 Mw

– Challenge

• Integrate solar produced steam with CC plant to use steam turbine capacity
• Avoids installation of new steam turbine system and generates renewable

energy

• Can provide firm power to customer using combination of solar and duct

burning

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Solar Augmented Steam Cycle – EPRI Study

• EPRI Study

– Produce Development Guideline Manual – Host Sites for analysis

• Griffith Energy Plant (Dynegy)
• Chuck Lenzie Plant (NV Energy)

– Generic & specific economic analysis

• IPP structure
• Utility structure

– Study Complete April/May 2009

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Solar Augmented Steam Cycle – EPRI Study

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Solar Augmented Steam Cycle – EPRI Study

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Solar Augmented Steam Cycle – EPRI Study

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Solar Island Combined Cycle Island

Condenser

G

Gas Turbine(s) Storage (optional) Steam Turbine

G

Heat Recovery Steam Generator Air Air and Water Vapor Electricity to the grid Parabolic trough field Steam 540 C 100 bar 395 C 295 C 600 C Solar Heat Exchanger

Solar Augmented Steam Cycle – EPRI Study