New methodology for adjusting rotating shadowband irradiometer measurement

Frank Vignola (1) , Josh Peterson (1) , Stefan Wilbert (2) , Philippe Blanc (3) , Norbert Geuder (4) , Christian Kern (5)

1 University of Oregon
2 DLR - German Aerospace Center
3 O.I.E. - Centre Observation, Impacts, Énergie
4 Centre for Applied Research of Sustainable Energy Technology - Stuttgart University of Applied Sciences
5 IRradiance Glass, Inc.

A new method is developed for correcting systematic errors found in rotating shadowband irradiometer measurements. Since the responsivity of photodiode-based pyranometers typically utilized for RST sensors is dependent upon the wavelength of the incident radiation and the spectral distribution of the incident radiation is different for the Direct Normal Trradiance and the Diffuse Horizontal Trradiance, spectral effects have to be considered. These cause the most problematic errors when applying currently available correction functions to RST measurements. Hence, direct normal and diffuse contributions are analyzed and modeled separately. An additional advantage of this methodology is that it provides a prescription for how to modify the adjustment algorithms to locations with different atmospheric characteristics from the location where the calibration and adjustment algorithms were developed. A summary of results and areas for future efforts are then discussed.

Domaines: Energétique

Frank Vignola, Josh Peterson, Stefan Wilbert, Philippe Blanc, Norbert Geuder, et al.. New methodology for adjusting rotating shadowband irradiometer measurement. AIP Conference Proceedings, 2017, SOLARPACES 2016: International Conference on Concentrating Solar Power and Chemical Energy Systems, 1850 (1), pp.140021. ⟨10.1063/1.4984529⟩. ⟨hal-01553426⟩