Sun -Shape and -Irradiance Profile Measurements at ESTI
There is a long-running trend to increase the concentration ratio at which CPV modules can nominally work, in order to reduce PV cell size and hence product costs. Increasing CPV module concentration ratio, however, imposes more stringent requirements on the acceptance angle of concentrating optics, on tracking accuracy and on the knowledge of the solar angular energy distribution. To address this latter issue a new research activity on solar energy angular distribution has started at the European Solar Test Installation (ESTI). The paper describes the set-up for sunshape measurements consisting of a high definition, high dynamic range CCD camera and its optics, together with the analysis of main error/uncertainty sources and the system characterization procedure. Preliminary results on sun -shape and -irradiance profile measurements at different direct/diffused irradiance ratios are discussed also in view of inferring a mathematical predictive model.
GAMBARDELLA Attilio;
GALLEANO Roberto;
HULD Thomas;
2012-08-07
American Institute of Physics
JRC61742
978-0-7354-0979-8,
0094-243X,
https://publications.jrc.ec.europa.eu/repository/handle/JRC61742,
10.1063/1.3658325,
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