Abstract
Solar radiation data for seven SURFRAD stations for the period 1996-2018 show an increase in irradiance under clear skies over time, with an interannual variability of the increase. A popular implementation of a clear sky model provided modeled irradiances for comparison with the SURFRAD data under conditions screened for clear skies. The use of the clear sky model, which did not consider year-to-year variances in atmospheric turbidity, was found problematic for resolving small changes in irradiance important for determining PV system degradation over three or five years, but less problematic for a period of ten years.
| Original language | American English |
|---|---|
| Number of pages | 7 |
| State | Published - 2020 |
| Event | 47th IEEE Photovoltaic Specialists Conference (PVSC 47) - Duration: 15 Jun 2020 → 21 Aug 2020 |
Conference
| Conference | 47th IEEE Photovoltaic Specialists Conference (PVSC 47) |
|---|---|
| Period | 15/06/20 → 21/08/20 |
Bibliographical note
See NREL/CP-5K00-79547 for paper as published in proceedingsNLR Publication Number
- NREL/CP-5K00-75923
Keywords
- aerosols
- clear-sky
- data
- irradiance
- models
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