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Rear-side spectral correction for accurate bifacial photovoltaic modelling.
Thesis (MEng)--Stellenbosch University, 2024.
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| Format: | Thesis |
| Language: | en_ZA en_ZA |
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Stellenbosch : Stellenbosch University
2024
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| _version_ | 1867613867004133376 |
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| access_status_str | Open Access |
| author | Rabadia, Mayur Manji |
| author2 | Rix, Arnold J.
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| author_browse | Rabadia, Mayur Manji Rix, Arnold J. |
| author_facet | Rix, Arnold J.
Rabadia, Mayur Manji |
| author_sort | Rabadia, Mayur Manji |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MEng)--Stellenbosch University, 2024. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/130453 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA en_ZA |
| last_indexed | 2026-06-10T12:42:57.574Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/130453 Rear-side spectral correction for accurate bifacial photovoltaic modelling. Rabadia, Mayur Manji Rix, Arnold J. Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. Photovoltaic power generation Spectral irradiance Photocurrent UCTD Thesis (MEng)--Stellenbosch University, 2024. ENGLISH ABSTRACT: Bifacial photovoltaic (PV) technology has a bright future in the African continent, especially in South Africa. Due to the rear side power generation capability, the technology is expected to reach a global bifacial PV market share of 70% by 2030. However, there is an insufficient amount of research conducted to accurately model the rear side of a bifacial PV module, especially to analyze the effect reflected light has on the rear side. This research focuses on accurately modelling the rear side, by observing the effects of the reflected light spectrum. The reflected light spectrum is analyzed to propose two new factors (irradiance albedo modifier and spectral response modifier) that enhance rear side power prediction. These factors are then used with an existing and well-established analytical model to model the rear side. In order to deduce these factors, current-voltage (I-V) curves for the rear side facing up and rear side facing down, as well as the Sun’s spectrum and the reflected spectrum of two different surfaces are measured. The experiments are carried out on white gravel and grass surfaces, due to the vast difference in the reflected spectrum from these surfaces. The five parameters of a single diode model for the rear side facing up are then extracted and used to model the rear side facing own. The results show that the photocurrent, Iph, is the most influenced parameter with varying reflected spectrums. The proposed factors are then compared to the other existing methods constant albedo, plane-of-array albedo and measured rear irradiance) used to model the rear side. The results indicate that the irradiance albedo modifier improves rear side modelling by 2.7% and 64.94%, while spectral response modifier improves rear side modelling by 61.7% and 87.4% on white gravel and grass surfaces, respectively. These results contribute significantly to a new and accurate way of modelling the rear side of a bifacial PV module with experimental verification. This research work aims to address the existing gap in the field of bifacial PV technology and provide a foundation for future work related to this area of research. AFRIKAANSE OPSOMMING: Tweevlak fotovolta¨ıese (PV) tegnologie het ’n blink toekoms in die Afrika-kontinent, veral in Suid-Afrika. As gevolg van die kragopwekkingsvermo¨e aan die agterkant, word daar verwag dat die tegnologie teen 2030 reeds 70% van die wˆereldwye PV-markaandeel sal opmaak. Daar is egter ’n onvoldoende hoeveelheid navorsing gedoen om die agterkant van ’n tweevlak PV-module akkuraat te modelleer, veral om die effek wat gereflekteerde lig op die agterkant het, te ontleed. Hierdie navorsing fokus op die akkurate modellering van die agterkant deur die effekte van die geweerkaatste ligspektrum waar te neem. Die gereflekteerde ligspektrum word ontleed om twee nuwe faktore voor te stel (bestralingsalbedo-wysiger en spektrale reaksie-wysiger) wat die kragvoorspelling van die agterkant verbeter. Hierdie faktore word dan saam met ’n bestaande en goed gevestigde analitiese model gebruik om die agterkant te modelleer. Om hierdie faktore af te lei, word stroom teenoor spanning (I-V)-krommes gemeet vir die agterkant wat na bo wys en die agterkant wat na onder wys, asook die Son se spektrum en die gereflekteerde spektrum van twee verskillende oppervlaktes. Die eksperimente word op wit gruis- en grasoppervlaktes uitgevoer, as gevolg van die groot verskil in die gereflekteerde spektrum van hierdie oppervlaktes. Die vyf parameters van ’n enkele diodemodel vir die agterkant wat na bo wys, word dan onttrek en gebruik om die agterkant na onder te modelleer. Die resultate toon dat die fotostroom, Iph, die meeste be¨ınvloedd word deur die verskillende gereflekteerde spektrums. Die voorgestelde faktore word dan vergelyk met die ander bestaande metodes (konstante albedo, vlak-van-skikking albedo en gemete agterbestraling) wat gebruik word om die agterkant te modelleer. Die resultate dui aan dat die bestraling albedo wysiger agterkant modellering met 2.7% en 64.94% verbeter, terwyl spektrale reaksie wysiger agterkant modellering verbeter met 61.7% en 87.4% op wit gruis en gras oppervlaktes, onderskeidelik. Hierdie resultate dra aansienlik by tot ’n nuwe en akkurate manier om die agterkant van ’n tweevlak-PV module te modelleer, met eksperimentele verifikasie. Hierdie navorsingswerk het ten doel om die bestaande gaping in die veld van bifasiale FV-tegnologie aan te spreek en om ’n grondslag te bied vir toekomstige werk wat met hierdie navorsingsarea verband hou. Masters 2024-02-28T08:02:11Z 2024-04-26T18:09:44Z 2024-02-28T08:02:11Z 2024-04-26T18:09:44Z 2024-03 Thesis https://scholar.sun.ac.za/handle/10019.1/130453 en_ZA en_ZA Stellenbosch University xvii, 117 pages : illustrations. application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Photovoltaic power generation Spectral irradiance Photocurrent UCTD Rabadia, Mayur Manji Rear-side spectral correction for accurate bifacial photovoltaic modelling. |
| title | Rear-side spectral correction for accurate bifacial photovoltaic modelling. |
| title_full | Rear-side spectral correction for accurate bifacial photovoltaic modelling. |
| title_fullStr | Rear-side spectral correction for accurate bifacial photovoltaic modelling. |
| title_full_unstemmed | Rear-side spectral correction for accurate bifacial photovoltaic modelling. |
| title_short | Rear-side spectral correction for accurate bifacial photovoltaic modelling. |
| title_sort | rear side spectral correction for accurate bifacial photovoltaic modelling |
| topic | Photovoltaic power generation Spectral irradiance Photocurrent UCTD |
| url | https://scholar.sun.ac.za/handle/10019.1/130453 |
| work_keys_str_mv | AT rabadiamayurmanji rearsidespectralcorrectionforaccuratebifacialphotovoltaicmodelling |