SOLARInnovations @Schott - contributionsto a competitive Parabolic TroughtechnologyLuis Alberto Solá PañosSCHOTT Solar SLE...
SOLARThe Challenge: Cost reduction © Copyright 2011 SCHOTT Solar CSP GmbH, All Rights Reserved
SOLARThe Task for SCHOTT Solar:   •     Economies of scale and cost cutting in production   •     Increasing the efficienc...
SOLAREconomies of Scale - SCHOTT Solar Production SitesMore than 600.000 Receivers already delivered to power plants aroun...
SOLARTowards higher Operating Temperatures                   Today : HTF: Synthetic Oil with limited operating temperture ...
SOLARIs Molten Salt a good HTF for Parabolic Troughs?                 g                          gUnder Investigation in i...
SOLARIncreasing the Operating TemperatureWhat is the upper temperature limit for the absorber?Answer important for operati...
SOLARTest result for 590 °C test temperature                               p                                       acceler...
SOLARSolutions for the Hydrogen ProblemProblem:      Thermo oil decomposes during operation,      hydrogen is generated.  ...
SOLAR Noble Gas Capsule    • located in the glass annulus of the receiver         opposite to the mirror side    • to be o...
SOLAR   Noble gas Capsule – How it works         g     p   capsule activation (2) can save more than 4000 W per receiver (...
SOLAR   Shield Reflectors   designed to enhance receiver efficiency                                                       ...
SOLARReflector Shields to Increase Aperture Area© Copyright 2011 SCHOTT Solar CSP GmbH, All Rights Reserved
SOLAR                     Shield Reflector benefits                                     h/L 0,3         h/L 0,8           ...
SOLARPTR 70 New DesignSCHOTT PTR®70 Receiver –Improved performance  Absorber  Ab b coating stable up t               ti   ...
SOLAR                            Gracias por su atención!!© Copyright 2011 SCHOTT Solar CSP GmbH, All Rights Reserved
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Luis Alberto Solá Paños - El papel de la química en el desarrollo de la energía solar termoeléctrica

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El papel de la química en el desarrollo de la energía solar termoeléctrica

By Luis Alberto Solá Paños. Schott Solar SL

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Luis Alberto Solá Paños - El papel de la química en el desarrollo de la energía solar termoeléctrica

  1. 1. SOLARInnovations @Schott - contributionsto a competitive Parabolic TroughtechnologyLuis Alberto Solá PañosSCHOTT Solar SLEL PAPEL DE LA QUÍMICA EN EL DESARROLLO DE LA ENERGÍA SOLAR TERMOELÉCTRICAEXPOQUIMIA, Barcelona, Nov. 18, 2011
  2. 2. SOLARThe Challenge: Cost reduction © Copyright 2011 SCHOTT Solar CSP GmbH, All Rights Reserved
  3. 3. SOLARThe Task for SCHOTT Solar: • Economies of scale and cost cutting in production • Increasing the efficiency of the receiver component: - improved coatings for higher optical efficiency - increased aperture p - larger component - higher operating temperature for new heat transfer fluids • Increasing reliability© Copyright 2011 SCHOTT Solar CSP GmbH, All Rights Reserved
  4. 4. SOLAREconomies of Scale - SCHOTT Solar Production SitesMore than 600.000 Receivers already delivered to power plants around the globe Mainz (Germany) Headquarter Mitterteich Production i P d ti since August 2006 A t Capacity: 200 MW p.a. Pilot line for new products Seville (Spain) Albuquerque (USA) Production since March 2008 Production since April 2009 Capacity: 400 MW p.a. Capacity: 400 MW p.a. standardized production and release processes across all sites best-practice and know-how transfer © Copyright 2011 SCHOTT Solar CSP GmbH, All Rights Reserved
  5. 5. SOLARTowards higher Operating Temperatures Today : HTF: Synthetic Oil with limited operating temperture (400°C) Average annual efficiency 12-13% New heat transfer fluids to increase operating temperature p g p and hence increase efficiency and reduce cooling load Direct steam generation: Molten salt Improved Synthetic Oil • temperatures > 500°C • temperatures > 500°C • temperatures > 400°C • efficiency >15% • efficiency >15% • efficiency >13% • cheaper HTF • Storage • less hydrogen Solar Only: New salts required to Limited efficiency gain - with storage more ex- g - reduce freezing risk g pensive than oil = safe operation and Cost: open - without storage not - to reduce parasitic competitive against PV losses → Potential niche market for hybrid solutions Cost: open© Copyright 2011 SCHOTT Solar CSP GmbH, All Rights Reserved
  6. 6. SOLARIs Molten Salt a good HTF for Parabolic Troughs? g gUnder Investigation in indoor and outdoor test facilities: corrosion bending of absorber tubes Cooling curve freeze and thaw tests with single and multiple receivers Test of drainage scenarios and recovery from freeze event qualification of absorber coatings for operating tempetatures up to 550°C Phase change © Copyright 2011 SCHOTT Solar CSP GmbH, All Rights Reserved
  7. 7. SOLARIncreasing the Operating TemperatureWhat is the upper temperature limit for the absorber?Answer important for operation and accelerated ageing test Minimum Ageing ageing time [h] temperature [°C] 1050 510 643 525 295 550 93 590 16 660 6 700 2 750 Limit (?) Calculated acceleration factors as a function of For a simulated 25 year lifetime and activation ageing test temperature for different activation energy of 170 kJ/mol calculated minimum ageing energies (operative temperature 400 °C) testing time (operating temperature 400 °C) © Copyright 2011 SCHOTT Solar CSP GmbH, All Rights Reserved
  8. 8. SOLARTest result for 590 °C test temperature p accelerated aging @ 590°C for operative temperature of 400°C Emittance@400°C 10 97,5 Absorptance 9 97,0 Absorptanc [%] Emitt 8 ce tance [%] 96,5 7 96,0 96 0 A 6 25 years 25 years 25 years lifetime 95,5 lifetime lifetime 500°C will be 400°C 450°C reached at 4850h 5 0 500 1000 1500 2000 2500 3000 3500 4800 Overall aging time [h] © Copyright 2011 SCHOTT Solar CSP GmbH, All Rights Reserved
  9. 9. SOLARSolutions for the Hydrogen ProblemProblem: Thermo oil decomposes during operation, hydrogen is generated. Hydogen permeation through steel absorber tube Getter secures vacuum After saturation of Getter heat losses are increasing rapidly Glass vacuum H2 Getter Steel tube oil© Copyright 2011 SCHOTT Solar CSP GmbH, All Rights Reserved
  10. 10. SOLAR Noble Gas Capsule • located in the glass annulus of the receiver opposite to the mirror side • to be opened non-invasive by a laser device • unique solution for the ´hot tube phenomenon phenomenon´ Enhancing the live time: - Th h ld glass t Threshold l temperature i di t indi- cates increased thermal losses - release of noble gas by opening the capsule with a single laser pulse - thermal losses will be immediately reduced © SCHOTT Solar CSP GmbH© Copyright 2011 SCHOTT Solar CSP GmbH, All Rights Reserved
  11. 11. SOLAR Noble gas Capsule – How it works g p capsule activation (2) can save more than 4000 W per receiver (1) initial end of getter Hydrogen filling Capsule state t t capacity it the th vacuum activation ti ti 5.7x 5 7x 5.7x H2 H2 1 2Xenon X relative relative capsule heatheat activation lossloss 1.3x 1 3x 1x 1.3x Xe/H 2 1x Xe/H2 PTR70® PTR70® (vacuum) (vacuum) initial time time state 20-25 several following years weeks years© Copyright 2011 SCHOTT Solar CSP GmbH, All Rights Reserved
  12. 12. SOLAR Shield Reflectors designed to enhance receiver efficiency REFLECTOR SHIELDS: - Cover and insulate space between receivers - Reflector to use radiation hitting the shielded area - gains depend on incident angle of irradiation Illustration of different incidence angles© Copyright 2011 SCHOTT Solar CSP GmbH, All Rights Reserved
  13. 13. SOLARReflector Shields to Increase Aperture Area© Copyright 2011 SCHOTT Solar CSP GmbH, All Rights Reserved
  14. 14. SOLAR Shield Reflector benefits h/L 0,3 h/L 0,8 h/L 1 h/L 0,3 h/L 0,8 h/L 1 h/L 0,3 h/L 0,8 h/L 1 3,0 3,0 3,0 3,0 3,0 3,0 2,0 2,0 2,0 Seasonal  relative gain in % n % n % 1,0 1,0 1,0relative gain in relative gain in 0,0 0,0 0,0 influence at  fl ‐1,0 Almeria shown  ‐1,0 ‐1,0 December 21st March / Sep. 21st June 21st by reference days ‐2,0 ‐2,0 ‐2,0-3,0 ‐3,0 -3,0 ‐3,0 -3,0 ‐3,0 4 6 8 10 12 14 16 18 20 22 4 6 8 10 12 14 16 18 20 22 4 6 8 10 12 14 16 18 20 22 4 22 4 22 4 22 time in h time in h time in h Annual yield calculation of  shield performance  considering incident angles  depending on latitudes  without local DNI effects.  (reflectance: 80%)  (reflectance: 80%) Slide 14 of 5 Slides © Copyright 2011 SCHOTT Solar CSP GmbH, All Rights Reserved
  15. 15. SOLARPTR 70 New DesignSCHOTT PTR®70 Receiver –Improved performance Absorber Ab b coating stable up t ti t bl to operating temperatures of 450°C Absorptance ≥ 95,5% Emittance E i ≤ 9 5% @400°C 9,5% Transmittance ≥ 96,5% Thermal losses < 250 W/m (400°C) Aperture length: > 96,7% @ working temperature (300 - 400°C) © Copyright 2011 SCHOTT Solar CSP GmbH, All Rights Reserved
  16. 16. SOLAR Gracias por su atención!!© Copyright 2011 SCHOTT Solar CSP GmbH, All Rights Reserved

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