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Long term HelioClim-3 global, beam and diffuse irradiance validation

Publication Genève, 2016
Abstract Satellite derived solar radiation is nowadays a good alternative to ground measurements for renewable energy applications. It has the advantage to provide data with a good accuracy, the best time and space granularity, in term of real time series and average year such as TMY. This report presents results of a long term validation in the European and Mediteranean regions of the irradiance evaluated by the HelioClim-3 scheme in hourly, daily and monthly values, and seven average products on an annual basis. The performance is also put forward with the natural interannual variability. The main results are: - the accuracy of the derived hourly global irradiance reaches 20% (standard deviation) with no bias, and 46% for the beam component with a 6% to 9% mean bias, - the main improvement from version 4 to version 5 comes from the use of a new clear syk model with sub-daily aerosol data as input, - some systematic patterns are pointed out, depending on the sky type, the site latitude, the aerosol optical depth and the ground snow cover, - the overall annual uncertainty of the HelioClim-3 scheme is situated within one interannual variability standard deviation for the global component, and within two standard deviations for the beam irradiation, - the overall performance for the beam component is slightly worse for version 5, but the frequency distributions are improved, particularly for high irradiance values.
Keywords Solar radiationSatellite modelModel validationHelioclim-3
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Research groups Systèmes énergétiques
ISE Pôle Sciences
ISE Energie
(ISO format)
INEICHEN, Pierre. Long term HelioClim-3 global, beam and diffuse irradiance validation. 2016 https://archive-ouverte.unige.ch/unige:81915

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Deposited on : 2016-03-16

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