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Calibration methods for rotating shadowbankd irradiometers and evaluation of calibration duration

Jessen, Wilko and Wilbert, Stefan and Nouri, Bijan and Geuder, Norbert and Fritz, H. (2015) Calibration methods for rotating shadowbankd irradiometers and evaluation of calibration duration. Atmospheric Measurement Techniques Discussions (AMTD), 8, pp. 10249-10282. Copernicus Publications. doi: 10.5194/amtd-8-10249-2015. ISSN 1867-8610.

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Official URL: http://www.atmos-meas-tech-discuss.net/8/10249/2015/


Resource assessment for Concentrated Solar Power (CSP) needs accurate Direct Normal Irradiance (DNI) measurements. An option for such measurement campaigns are Rotating Shadowband Irradiometers (RSIs) with a thorough calibration. Calibration of RSIs and Si-sensors in general is complex because of the inhomogeneous spectral response of such sensors and incorporates the use of several correction functions. A calibration for a given atmospheric condition and air mass might not work well for a different condition. This paper covers procedures and requirements for two calibration methods for the calibration of Rotating Shadowband Irradiometers. The necessary duration of acquisition of test measurements is examined in regard to the site specific conditions at Plataforma Solar de Almeria (PSA) in Spain. Data sets of several long-term calibration periods from PSA are used to evaluate the deviation of results from calibrations with varying duration from the long-term result. The findings show that seasonal changes of environmental conditions are causing small but noticeable fluctuation of calibration results. Certain periods (i.e. November to January and April to May) show a higher likelihood of particularly adverse calibration results. These effects can partially be compensated by increasing the inclusions of measurements from outside these periods.

Item URL in elib:https://elib.dlr.de/98526/
Document Type:Article
Title:Calibration methods for rotating shadowbankd irradiometers and evaluation of calibration duration
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Wilbert, Stefanstefan.wilbert (at) dlr.deUNSPECIFIED
Fritz, H.Hochschule für Technik StuttgartUNSPECIFIED
Date:6 October 2015
Journal or Publication Title:Atmospheric Measurement Techniques Discussions (AMTD)
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:No
DOI :10.5194/amtd-8-10249-2015
Page Range:pp. 10249-10282
Publisher:Copernicus Publications
Keywords:direct normal irradiance, rotating shadowband irradiometer,
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Concentrating Solar Systems (old)
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Qualification (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research > Qualifizierung
Deposited By: Kruschinski, Anja
Deposited On:04 Nov 2015 14:30
Last Modified:20 Jun 2021 15:46

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