1 proprietary & confidential © 2014 brightsource energy, inc. all rights reserved. proprietary...
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1Proprietary & Confidential © 2014 BrightSource Energy, Inc. All rights reserved.
Proprietary & Confidential © 2014 BrightSource Energy, Inc. All rights reserved.
Thermographic IR Flux Measurements in Concentrated Solar Power Fields
February 26, 2014
2Proprietary & Confidential © 2014 BrightSource Energy, Inc. All rights reserved.
Presentation Outline• Technology overview• Current projects• Flux measurements
with thermographic camera
3Proprietary & Confidential © 2014 BrightSource Energy, Inc. All rights reserved.
Brightsource Concentrated Solar Power Technologies
HELIOSTATS
OPTIMIZATION / CONTROL SOFTWARE
STORAGE
AIR-COOLED CONDENSER
AUXILIARY GAS-FIRED BOILER
TURBINE
SOLAR RECEIVER / BOILER
4Proprietary & Confidential © 2014 BrightSource Energy, Inc. All rights reserved.
Presentation Outline• Technology overview• Current projects• Flux measurements
with thermographic camera
5Proprietary & Confidential © 2014 BrightSource Energy, Inc. All rights reserved.
EOR-Enhanced Oil Recovery 4K HL 29MW Thermal
Operational for 2 years
Coalinga
6Proprietary & Confidential © 2014 BrightSource Energy, Inc. All rights reserved.
3 Solar Fields. 170K HL 392MW electrical Operational for 2 months
Ivanpah: World’s Largest Solar Thermal Project
7Proprietary & Confidential © 2014 BrightSource Energy, Inc. All rights reserved.
1 Solar Field. 50K HL 121MW electrical Operational within 2.5 years
Ashalim
8Proprietary & Confidential © 2014 BrightSource Energy, Inc. All rights reserved.
Presentation Outline• Technology overview• Current projects• Flux measurements
with thermographic camera
9Proprietary & Confidential © 2014 BrightSource Energy, Inc. All rights reserved.
Receiver Radiative Flux
Solar Spectrum radiation from Solar Field absorbed by receiver (high absorptivity)
Black Body radiation, radiated by receiver (high emissivity)
10Proprietary & Confidential © 2014 BrightSource Energy, Inc. All rights reserved.
Emissivity variations. Changing atmospheric conditions.
( humidity+ visibility) Camera in outdoor environment.
IR accuracies difficulties
11Proprietary & Confidential © 2014 BrightSource Energy, Inc. All rights reserved.
Thermodynamic model
R
TTQ BulkSkin
IR camera (ε, ambient T, wind)
Process data
Net Heat transfer rate
12Proprietary & Confidential © 2014 BrightSource Energy, Inc. All rights reserved.
Thermodynamic model
hRR
W
KmR PipesPa
1int
2
Heat Transfer Coefficient. fluid status dependent
Known material and geometryMeasured
offline in a lab
13Proprietary & Confidential © 2014 BrightSource Energy, Inc. All rights reserved.
Flux calculation process
14Proprietary & Confidential © 2014 BrightSource Energy, Inc. All rights reserved.
Measured Flux Expected Flux
Flux calculation results
15Proprietary & Confidential © 2014 BrightSource Energy, Inc. All rights reserved.
the IR camera has a constant view of all the boiler. Can detect process problems
Before drum circulation After drum circulation
Additional IR uses
16Proprietary & Confidential © 2014 BrightSource Energy, Inc. All rights reserved.
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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