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Proprietary & Confidential © 2014 BrightSource Energy, Inc. All rights reserved.

Thermographic IR Flux Measurements in Concentrated Solar Power Fields

February 26, 2014

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Presentation Outline• Technology overview• Current projects• Flux measurements

with thermographic camera

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Brightsource Concentrated Solar Power Technologies

HELIOSTATS

OPTIMIZATION / CONTROL SOFTWARE

STORAGE

AIR-COOLED CONDENSER

AUXILIARY GAS-FIRED BOILER

TURBINE

SOLAR RECEIVER / BOILER

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Presentation Outline• Technology overview• Current projects• Flux measurements

with thermographic camera

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EOR-Enhanced Oil Recovery 4K HL 29MW Thermal

Operational for 2 years

Coalinga

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3 Solar Fields. 170K HL 392MW electrical Operational for 2 months

Ivanpah: World’s Largest Solar Thermal Project

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1 Solar Field. 50K HL 121MW electrical Operational within 2.5 years

Ashalim

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Presentation Outline• Technology overview• Current projects• Flux measurements

with thermographic camera

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Receiver Radiative Flux

Solar Spectrum radiation from Solar Field absorbed by receiver (high absorptivity)

Black Body radiation, radiated by receiver (high emissivity)

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Emissivity variations. Changing atmospheric conditions.

( humidity+ visibility) Camera in outdoor environment.

IR accuracies difficulties

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Thermodynamic model

R

TTQ BulkSkin

IR camera (ε, ambient T, wind)

Process data

Net Heat transfer rate

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Thermodynamic model

hRR

W

KmR PipesPa

1int

2

Heat Transfer Coefficient. fluid status dependent

Known material and geometryMeasured

offline in a lab

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Flux calculation process

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Measured Flux Expected Flux

Flux calculation results

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the IR camera has a constant view of all the boiler. Can detect process problems

Before drum circulation After drum circulation

Additional IR uses

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the IR cameras are a critical component in the operation of the Concentrated Solar Power Fields as

part of the Flux management of the Solar Field.

Conclusion

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brightsourceenergy.com

Thanks:• SBMS team-

Gilad Naor and Ido Segev

• EO team- Slava Pekarsky

• Process team-Dr. Joshua Golbert