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

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 1

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 2

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Solar Augmented Steam Cycle – EPRI Study Solar Heat Steam 540 C Exchanger 100 bar Air and Water Vapor 395 C Steam G Turbine Heat Recovery Storage Air (optional) Steam Condenser Generator 295 C 600 C Parabolic trough field G Electricity to the grid Gas Turbine(s) Solar Island Combined Cycle Island 6