Download - Cu stp 09_parabolic dish
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SOLAR THERMAL POWER!GEEN 4830 – ECEN 5007!
Manuel A. Silva Pé[email protected]!
9. Parabolic Dish Technology!
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Parabolic dish systems
} Combine a paraboloidal concentrator (parabolic dish) with a Power Conversion Unit (PCU) directly attached to the concentrator
} Types of PCU } Gas Turbines } Direct Steam Generation } Stirling Engine
Advanco ('82-'85)"
MDAC ('83-'88) Boeing/SES (ʻ98-ʼ99)"
SBP/Almeria"('88-'99)"
Cummins"('89-'96)"
SBP/Solo"
SAIC/STM"
19/07/11 1 GEEN 4830 – ECEN 5007
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Parabolic Dish + Gas Turbine
19/07/11 GEEN 4830 – ECEN 5007 2
} Cummings 1996
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Parabolic dish - Direct Steam Generation
Dish collector field at Shenandoah, GA • Industrial process heat project. • 7 meters diameter, • aluminized film reflector Heat from the field was used in a textile plant for air conditioning and process heat.
19/07/11 3 GEEN 4830 – ECEN 5007
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Solar Village (Arabia Saudí)
19/07/11 4 GEEN 4830 – ECEN 5007
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Parabolic dish – Stirling engine experiences (source: Mancini et al. JSEE 2003)
19/07/11 5 GEEN 4830 – ECEN 5007
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Parabolic dish – Stirling engine
} High performance } High concentration ratio } High temperature } Modularity } No water consumption
• High capital costs – Stirling engine and concentrator
• High O+M costs – H2 refilling, engine maintenance
• Durability of the engine SBP/Solo-PSA"
10-kW EuroDish
19/07/11 6 GEEN 4830 – ECEN 5007
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Dish – Stirling systems. Main elements } Structure } Concentrator } Tracking system } PCU } Control
19/07/11 7 GEEN 4830 – ECEN 5007
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Structure
19/07/11 GEEN 4830 – ECEN 5007 8
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Structural optical surface
19/07/11 9 GEEN 4830 – ECEN 5007
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Space frame structures
19/07/11 10 GEEN 4830 – ECEN 5007
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Stretched membrane
19/07/11 11 GEEN 4830 – ECEN 5007
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Concentrator
19/07/11 GEEN 4830 – ECEN 5007 12
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Glass mirror-faceted
} Spherically curved mirrors } Individually alignable } Parabolic shaped structure
19/07/11 13 GEEN 4830 – ECEN 5007
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Full surface paraboloid } The entire surface forms a paraboloid } Usually made of a number of ‘petals’
19/07/11 14 GEEN 4830 – ECEN 5007
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Stretched membrane. Single facet } Membrane
} Preshaped (vacuum not enough) } Thin reflective plastic } Thin metal sheet + reflective surface
19/07/11 15 GEEN 4830 – ECEN 5007
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Stretched membrane - multifaceted } Avoid the need for preshaping } Difficult alignment
19/07/11 16 GEEN 4830 – ECEN 5007
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Mounting
Pedestal Carrousel
19/07/11 GEEN 4830 – ECEN 5007 17
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Tracking
19/07/11 GEEN 4830 – ECEN 5007 18
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Polar tracking
19/07/11 19 GEEN 4830 – ECEN 5007
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Elevation - azimuth tracking
19/07/11 20 GEEN 4830 – ECEN 5007
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Receiver } Absorbs concentrated solar energy and converts it to thermal
energy that heats the working fluid (gas) inside the engine. } External (low temp.) } Cavity (high temp.)
} Directly illuminated tubes } Reflux
19/07/11 21 GEEN 4830 – ECEN 5007
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Directly illuminated tubes receiver
19/07/11 22 GEEN 4830 – ECEN 5007
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Reflux receiver } Intermediate heat transfer fluid } Decouple receiver and engine
} Pool boiler. The absorber surface is always immersed in a liquid
19/07/11 23 GEEN 4830 – ECEN 5007
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Reflux receiver } Heat pipe. A wick draws the liquid metal from a small sump
19/07/11 24 GEEN 4830 – ECEN 5007
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Stirling Engine } The Stirling cycle
19/07/11 25 GEEN 4830 – ECEN 5007
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Stirling engines } Kinematic } Free piston
19/07/11 26 GEEN 4830 – ECEN 5007
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Cleanergy, 10 kW
19/07/11 GEEN 4830 – ECEN 5007 27
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Performance of Eurodish System
19/07/11 GEEN 4830 – ECEN 5007 28
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Performance of the Eurodish System
19/07/11 GEEN 4830 – ECEN 5007 29
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State of the art } Most efficient solar to electric technology (>30%). } Pre-commercial experiences
} Increase reliability } Reduce costs
} Three (four) main manufacturers / systems today } Tessera Suncatcher (SES) 25 kW } Cleanergy / SBP Eurodish 10 kW } Infinia Corp 3 kW } (Ripaso Energy) 25 kW
19/07/11 30 GEEN 4830 – ECEN 5007
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SES / Tessera Suncatcher http://www.tesserasolar.com/
19/07/11 31 GEEN 4830 – ECEN 5007
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SES / Tessera Solar, Maricopa 1.5 MW
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Infinia http://www.infiniacorp.com/
} 3 kW Free piston engine
19/07/11 33 GEEN 4830 – ECEN 5007
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Infinia
19/07/11 34 GEEN 4830 – ECEN 5007
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Eurodish sbp.de
} 10 kW kinematic Stirling engine (SOLO V161) } 8.5 m diameter concentrator
19/07/11 35 GEEN 4830 – ECEN 5007
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Projects (Tessera Solar / SES)
19/07/11 GEEN 4830 – ECEN 5007 36
} Imperial Valley (Solar 2) | Imperial County, California | San Diego Gas & Electric (SDG&E) 750MW | Total of 30,000 SunCatcher™ Power Systems.
} Calico (Solar 1) | San Bernardino County, California | Southern California Edison (SCE) 850MW | Total of 34,000 SunCatcher™ Power Systems. .
} Western Ranch Solar | West Texas | CPS Energy 27MW |Total of 1,080 SunCatcher™ Power Systems.
} Maricopa Solar | Maricopa County - Peoria, Arizona | Salt River Project (SRP) 1.5MW |Total of 60 SunCatcher™ Power Systems.
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Projects (Infinia)
19/07/11 GEEN 4830 – ECEN 5007 37
} Infinia } 100 kW demo plant, Vllarrobledo, Spain } 70 MW (2 projects) in Spain } SD G&E (demonstration projects)
} Cleanergy } SOLARDIS (5 units x 10 kW)
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19/07/11 GEEN 4830 – ECEN 5007 38
} Free piston engine. } http://www.infiniacorp.com/howitworks.html } http://www.youtube.com/watch?v=Fl8iNXsjsbI&feature=fvw
} Tessera /SES } http://www.youtube.com/watch?v=z-MJrJpW2M0
} Infinia } http://www.infiniacorp.com/powerdish.html
} Cleanergy
} Eurodish