Title :
Measuring solar spectral and angle-of-incidence effects on photovoltaic modules and solar irradiance sensors
Author :
King, David L. ; Kratochvil, Jay A. ; Boyson, William E.
Author_Institution :
Sandia Nat. Labs., Albuquerque, NM, USA
fDate :
29 Sep-3 Oct 1997
Abstract :
Historically, two time-of-day dependent factors have complicated the characterization of photovoltaic module and array performance; namely, changes in the solar spectrum over the day and optical effects in the module that vary with the solar angle-of-incidence. This paper describes straightforward methods for directly measuring the effects of these two factors. Measured results for commercial modules, as well as for typical solar irradiance sensors (pyranometers) are provided. The empirical relationships obtained from the measurements can be used to improve the methods used for system design, verification of performance after installation, and diagnostic monitoring of performance during operation
Keywords :
atmospheric measuring apparatus; optical variables measurement; solar cell arrays; sunlight; PV array performance; angle-of-incidence effect; diagnostic performance monitoring; diffuse irradiance component; direct irradiance component; optical effects; performance verification; photovoltaic module performance; photovoltaic modules; pyranometers; solar angle-of-incidence; solar irradiance sensors; solar spectral effect measurement; solar spectrum changes; system design; time-of-day dependent factors; Circuit testing; Laboratories; Monitoring; Optical arrays; Optical sensors; Photovoltaic systems; Sensor arrays; Sensor phenomena and characterization; Solar power generation; Sun;
Conference_Titel :
Photovoltaic Specialists Conference, 1997., Conference Record of the Twenty-Sixth IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
0-7803-3767-0
DOI :
10.1109/PVSC.1997.654283
