ARM Pyrgeometer Calibrations Update...(7a) EPLAB Re-cal for 10 PIRs for comparison with original...
Transcript of ARM Pyrgeometer Calibrations Update...(7a) EPLAB Re-cal for 10 PIRs for comparison with original...
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ARM Pyrgeometer Calibrations Update
Broadband Radiometric Measurements Group
Tom StoffelIbrahim RedaMark Kutchenreiter
29 March 2011
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NATIONAL RENEWABLE ENERGY LABORATORY
Solar Radiation Research Lab (SRRL)
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Construction ProjectScheduled Completion:
June 2011
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NATIONAL RENEWABLE ENERGY LABORATORY
Radiometer Infrastructure Upgrades
SIRS• New Mounting Fixtures• Upgraded Data Loggers• Replace Signal Cables/Connectors
Radiometer Calibration Facility• Replace Signal Cables/Connectors• Implement Pyrgeometer Calibrations Traceable to
World Infrared Standard Group (ECO-00781)
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NATIONAL RENEWABLE ENERGY LABORATORY
SIRS Upgrades
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Since ~1993 New A-Frame
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NATIONAL RENEWABLE ENERGY LABORATORY
SIRS Upgrades
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• Signal Cables• Power Cables• Conduits• Campbell Loggers CR-3000
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NATIONAL RENEWABLE ENERGY LABORATORY
RCF Upgrades
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• BORCAL (Shortwave)• BORCAL (Longwave = PYRG-CAL)
New Hardware & PROCESS
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Pyrgeometer Calibration ProcessWISGWorld Reference
NREL Reference
NREL Transfer Standards (+/- 2 W/m2 agreement with NOAA/GMD)
ARM/SGP Transfer Standards
ARM Field Pyrgeometers
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NATIONAL RENEWABLE ENERGY LABORATORY
Pyrgeometer Calibration Action Items
(6) Frequency: Two Year Cycle using outdoor method
(7a) EPLAB Re-cal for 10 PIRs for comparisonwith original results:Six (6) SIRS PIRs going to EPLAB as wespeak
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NATIONAL RENEWABLE ENERGY LABORATORY
Compare WISG with NREL Calibrations
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NATIONAL RENEWABLE ENERGY LABORATORY
Compare WISG with NREL Calibrations
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NATIONAL RENEWABLE ENERGY LABORATORY
Compare WISG with EPLAB Calibrations
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NATIONAL RENEWABLE ENERGY LABORATORY
Joe’s Validation of NREL Equation
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NATIONAL RENEWABLE ENERGY LABORATORY 13
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NATIONAL RENEWABLE ENERGY LABORATORY 14
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NATIONAL RENEWABLE ENERGY LABORATORY
Pyrgeometer Calibration Action Items
(7b) Compare PIRs with new (WISG) ARM calibrations with original EPLAB calibrations using 2-coefficient formula:
_Original Cal and case-dome coeff = 4.0_Original Cal and new case-dome coeff_New Cal and new case-dome coeff_New Cal and 3-Coeff formula_Compare above to see differences…
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ARM Pyrgeometer Calibrations UpdateSolar Radiation Research Lab (SRRL)Radiometer Infrastructure UpgradesSIRS UpgradesSIRS UpgradesRCF UpgradesPyrgeometer Calibration ProcessPyrgeometer Calibration Action ItemsCompare WISG with NREL CalibrationsCompare WISG with NREL CalibrationsCompare WISG with EPLAB CalibrationsJoe’s Validation of NREL EquationSlide Number 13Slide Number 14Pyrgeometer Calibration Action Items