Spectral Effects in Albedo and Rearside Irradiance Measurment for Bifacial Performance Estimation: Preprint

Conference · Tue Aug 04 00:00:00 EDT 2020

OSTI ID:1669528

Gostein, Michael; Marion, Bill; Stueve, Bill

Albedo data are essential for accurate prediction of bifacial PV module performance. However, spectral response mismatch between PV modules and irradiance sensors used in albedometers can limit the accuracy of performance predictions. In order to provide quantitative assessment of this effect, we investigate via simulation the differences in spectrally responsive albedo measured with thermopile pyranometers and crystallinesilicon PV reference cells in comparison to a representative crystalline-silicon bifacial PV module for nine different representative ground surface materials. Calculations are performed using simulated solar spectra together with catalogued spectral reflectivity data distributed with the SMARTS simulation software. For the specific materials considered, the results show that albedo measurement using thermopile pyranometers could over or under-estimate the ground-reflected radiation usable by a bifacial PV module by up to 10%, versus only approximately 4% total range of variation for a PV reference cell.

• Research Organization: National Renewable Energy Laboratory (NREL), Golden, CO (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S)
• DOE Contract Number: AC36-08GO28308
• OSTI ID: 1669528
• Report Number(s): NREL/CP-5K00-75927; MainId:6127; UUID:344bc7d5-d73e-ea11-9c2f-ac162d87dfe5; MainAdminID:15205
• Conference Information: Presented at the 47th IEEE Photovoltaic Specialists Conference (PVSC 47), 15 June - 21 August 2020; 79287
• Country of Publication: United States
• Language: English

Related Subjects

Albedo
bifacial
mismatch
pyranometer
reference cell
SOLAR ENERGY