NDLI: Calibration of Spectroradiometers for Outdoor Direct Solar Spectral Irradiance Measurements

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Calibration of Spectroradiometers for Outdoor Direct Solar Spectral Irradiance Measurements

Content Provider	Semantic Scholar
Author	Georghiou, George Elia Hadjipanayi, Maria Norton, Matthew Paraskeva, Panagiota
Copyright Year	2013
Abstract	Spectral measurements are an important aspect of environmental monitoring for photovoltaics, especially concentrator photovoltaics (CPV) that use multi-junction cells with spectrally dependent output. There are only a few reliable sources of spectrally resolved direct normal irradiance (DNI) data in the world since the measurement equipment is expensive and calibration is hard to maintain. Efforts have been made to produce a high quality data set of spectra with reduced measurement uncertainties. An evaluation of the uncertainty of both indoor and outdoor spectrum measurements and their origins is presented in the paper. A traceable measurement system was used to calibrate two sets of spectroradiometers and repeated measurements have been carried out to find the uncertainties of measurement repeatability, positional sensitivity and lamp stability. The two measurement systems were then used outdoors alongside broadband solar irradiance measurement devices, to determine the differences of the spectral measurements between the systems. Finally, a collimator was attached to one of the spectroradiometer systems and measurements were taken using both collimated and non-collimated systems to establish the impact of the collimator on spectral measurements.
Starting Page	3466
Ending Page	3471
Page Count	6
File Format	PDF HTM / HTML
DOI	10.4229/28thEUPVSEC2013-4AV.6.35
Alternate Webpage(s)	http://www.foss.ucy.ac.cy/projects/pvtune/28eupvsec.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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