Impacts of reflector positioning on horizontal bifacial photovoltaic module performance: an experimental case study

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dc.authorid0000-0002-2852-1807
dc.contributor.authorAksoz, Zafer Yavuz
dc.date.accessioned2026-04-04T18:55:36Z
dc.date.available2026-04-04T18:55:36Z
dc.date.issued2025
dc.departmentİstanbul Bilgi Üniversitesi
dc.description.abstractBifacial photovoltaic (bPV) technology, which converts solar irradiance from both the front and rear surfaces into electricity, represents a promising solution for enhancing solar energy conversion. While numerous studies have explored bPV performance under different environmental and geometric conditions, limited research has addressed the influence of horizontal reflector placement for horizontally mounted bPV modules, particularly under real-world conditions. This study fills that gap by experimentally evaluating the effect of five horizontal reflector configurations on the electrical performance of a bPV module. The experiments were carried out over three consecutive winter days on the rooftop of a university campus in Istanbul, T & uuml;rkiye. Performance metrics included power yield and electrical efficiency, along with ambient temperature, relative humidity, wind speed, and module surface temperature. Results demonstrated that reflector positioning significantly influences performance, with reflector positions 2 and 3 consistently delivering the highest power output and efficiency. Average relative increases in power yield were 9.61 %, 13.88 %, 14.71 %, 9.54 %, and 5.43 % for positions 1 through 5, respectively. Corresponding average electrical efficiencies for positions 0 through 5 were 22.91 % (no reflector), 25.14 %, 26.08 %, 26.31 %, 25.12 %, and 24.18 %. These findings suggest that proper reflector placement enhances irradiance availability on the rear side of the module, particularly at low solar elevation angles, leading to notable improvements in performance. The study provides valuable experimental data under realistic conditions and contributes to the design optimization of bifacial PV systems, supporting the advancement of renewable energy technologies aligned with Sustainable Development Goals.
dc.description.sponsorshipIstanbul Bilgi University through BILGI Scientific Research Project (BAP) fund [2024.01.010]
dc.description.sponsorshipThis research was funded by Istanbul Bilgi University through BILGI Scientific Research Project (BAP) fund with Grant Number of 2024.01.010.
dc.identifier.doi10.1016/j.seta.2025.104578
dc.identifier.doi10.1016/j.seta.2025.104578
dc.identifier.issn2213-1388
dc.identifier.issn2213-1396
dc.identifier.scopus2-s2.0-105016019492
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.seta.2025.104578
dc.identifier.urihttps://hdl.handle.net/11411/10476
dc.identifier.volume83
dc.identifier.wosWOS:001575034500001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofSustainable Energy Technologies and Assessments
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20260402
dc.snmzKA_Scopus_20260402
dc.subjectBifacial Photovoltaic
dc.subjectBpv
dc.subjectEnergy
dc.subjectReflector
dc.subjectRenewable Energy
dc.subjectSolar
dc.titleImpacts of reflector positioning on horizontal bifacial photovoltaic module performance: an experimental case study
dc.typeArticle

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