EE 237: Solar Energy Conversion Week 8: Thin film technologies OPV ...

EE 237: Solar Energy Conversion Week 8:

Thin film technologies OPV Dye-sensitized Solar Thermal May 22nd 2013 tanford University

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Resources for thin film • Handbook of photovoltaics • http://bit.ly/XPtTQg • CdTe: Chapter 14 • CIGS: Chapter 13 • a-Si: Chapter 12 • OPV: Chapter 16 • Handouts on class website • HO7 # Materials for thin film PV • HO9 # Thin film silicon • HO10 # Terawatt challenge for thin film PV

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Solar Thermal Quiz: When does the peak load occur?

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Quiz: When does the peak load occur?

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Quiz: When does the peak demand?

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History of Solar Thermal

http://en.wikipedia.org/wiki/Frank_Shuman tanford University

Frank Shuman, 1914

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History of Solar Thermal

http://en.wikipedia.org/wiki/Frank_Shuman tanford University

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CSP systems

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CSP systems Trough

Tower

Disc

Quiz: which has the highest efficiency ? tanford University

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CSP systems

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Energy Conversion

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Receptor

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Receptor

Quiz: would it appear black / white ? tanford University

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Receptor

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Trough (SEGS, 1980’s CA)

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Trough (SEGS, 1980’s CA)

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Through, Nevada Solar One

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Linear Fresnel

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Power Tower

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Brightsource Energy Power Tower, NV

• High Temp. – 550 C • Air Cooled Power Block • Construction started late 2010 • First 130 MW Plant to start operation in late 2012 – early 2013

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Quiz: considerations for tower design

• Height • Plant size • Heliostat Angle tanford University

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eSolar Power Tower • Pre-fabricated, massproduced components (200,000 per 46-MW plant) •Low profile installation (requiring much less steel and no ground penetration) •Software control of mirror calibration and tracking •Semi-automated cleaning

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eSolar Power Tower

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Dish: 25kW Stirling Systems • 1.5 MW SES Maricopa Dish Stirling Power • 60 Dishes • 87 m2 collector • Peak system efficiency 31.25% • There is no simple way to integrate thermal storage into a dish system.

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Steam Storage

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Salt Storage Andasol 1 (Spain 2009)

• Nominal Capacity: 44.9 MW • Capital Inv: 300 million € • 549,380 m2 of trough TwoTank MS TES • 7 full-load hours of storage Capacity: 880 MWh • 2 Storage Tanks: 13 m X 38 m 28,500 tons of salt • Flow Rate: 948 kg/s • Cold Tank Temp: 292°C • Hot Tank Temp: 384°C

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Salt Storage

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Salt Storage

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Summary of CSP systems

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Best places for CSP

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Government Credit for CSP

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