Model and Validation of Single-Axis Tracking With Bifacial PV

Single-axis tracking is a cost-effective deployment strategy for large-scale ground-mount photovoltaic systems in regions with high direct-normal irradiance. Bifacial modules in 1-axis-tracking systems boost energy yield by 4%-15% depending on module type and ground albedo, with a global average of...

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Vydáno v:IEEE journal of photovoltaics Ročník 9; číslo 3; s. 715 - 721
Hlavní autoři: Pelaez, Silvana Ayala, Deline, Chris, Greenberg, Peter, Stein, Joshua S., Kostuk, Raymond K.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Piscataway IEEE 01.05.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:
Albedo
Algorithms
Bifacial photovoltaic (PV) module
Brightening
Computational modeling
Computer simulation
configuration factor (CF)
Data models
Geometry
Irradiance
Lighting
Modules
Photovoltaic cells
Photovoltaic systems
ray tracing
Renewable energy sources
single-axis tracking
Solar cells
System effectiveness
Tracking systems
Tubes
Oregon
United States > US
ISSN:2156-3381, 2156-3403
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Shrnutí:Single-axis tracking is a cost-effective deployment strategy for large-scale ground-mount photovoltaic systems in regions with high direct-normal irradiance. Bifacial modules in 1-axis-tracking systems boost energy yield by 4%-15% depending on module type and ground albedo, with a global average of 9%. This benefit is in addition to the 15%-25% energy gain already afforded by single-axis tracking relative to fixed-tilt deployments. Here, we compare model results against field performance data for two side-by-side bifacial/monofacial tracked systems - one in Albuquerque, NM, USA, and one in eastern Oregon. The Albuquerque system shows monthly rear irradiance gain of 10%-14.9%, and the Oregon bifacial system has an average performance ratio 9.4% higher than the monofacial system. Both results match bifacial irradiance model results within uncertainty. Simulations show that smart tracking algorithms can offer more than 1% improvement on annual energy yield by adjusting tilt angle under cloudy conditions. Finally, ray-tracing simulations investigated edge brightening, suggesting a 15%-25% increase in rear irradiance at the ends of tracker rows, but up to 20% loss from center-mounted torque tubes, creating multiple shadows.
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ISSN:2156-3381
2156-3403
DOI:10.1109/JPHOTOV.2019.2892872