A Comparison Study of the Performance of South/North Facing vs East/West-Facing Bifacial Modules under Shading Condition

Christopher Deline, Amir Asgharzadeh, Joshua Stein, Fatima Toor

Research output: Contribution to conferencePaperpeer-review

9 Scopus Citations

Abstract

Horizon obstructions can decrease the diffuse and direct light received by photovoltaic (PV) modules. In this paper, we compare the performances of the two bifacial PV system orientations: Optimally tilted facing south/north (BiS/N), and vertically installed facing east/west (BiE/W) under no-shading and shading conditions. We considered multiple locations with different latitudes and weather types and observed that without any horizon obstructions, BiS/N outperforms BiE/W for most locations. However, certain types of obstructions cause BiE/W to have higher energy yield than BiS/N. For sunnier and lower latitude locations such as Albuquerque, NM, a very large obstruction at south causes this result. On the other hand, for higher latitude locations (e.g. Anchorage, AK), much smaller obstructions at south is enough to have higher energy yield for BiE/W than BiS/N. Under certain shading conditions BiE/W produces up to 75 kWh/year more energy than BiS/N.

Original languageAmerican English
Pages1730-1734
Number of pages5
DOIs
StatePublished - 26 Nov 2018
Event7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - Waikoloa Village, United States
Duration: 10 Jun 201815 Jun 2018

Conference

Conference7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018
Country/TerritoryUnited States
CityWaikoloa Village
Period10/06/1815/06/18

Bibliographical note

Publisher Copyright:
© 2018 IEEE.

NREL Publication Number

  • NREL/CP-5K00-73678

Keywords

  • bifacial PV
  • photovoltaic systems
  • ray tracing
  • solar power generation

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