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Estimation of optimal tilt angles for photovoltaic panels in Egypt with experimental verifications

The principal target of this work is to compute the optimal tilt angle (OTA) for Photovoltaic (PV) panels. To perform this task, comprehensive simulations are done starting from altering the tilt angle (TA) daily, to use one fixed TA for all the year. The mathematical models for extra-terrestrial ra...

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Autores principales: Abdelaal, Ashraf K., El-Fergany, Attia
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9968325/
https://www.ncbi.nlm.nih.gov/pubmed/36841921
http://dx.doi.org/10.1038/s41598-023-30375-8
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author Abdelaal, Ashraf K.
El-Fergany, Attia
author_facet Abdelaal, Ashraf K.
El-Fergany, Attia
author_sort Abdelaal, Ashraf K.
collection PubMed
description The principal target of this work is to compute the optimal tilt angle (OTA) for Photovoltaic (PV) panels. To perform this task, comprehensive simulations are done starting from altering the tilt angle (TA) daily, to use one fixed TA for all the year. The mathematical models for extra-terrestrial radiation (ETR) of both horizontal and inclined surfaces are presented firstly. At a later stage, the optimization formulation for the maximizing the solar radiation (SR) is adapted, and then the daily, monthly, seasonally, half-yearly and optimal fixed TAs are obtained. Although, the daily OTA produces the maximum SR, it is costly and impractical. It is found that altering the TA twice a year at optimal values that are computed as 5° and 50° for Suez city, gives the best results that are very near to the daily altering of the OTA. The difference between the two methods is 1.56% which is very small. Also, the two OTAs has SR better than that of the fixed OTA which is 28° by 7.77%. Also, it is found that the yearly fixed OTA (28°) is nearly equal to the latitude angle of Suez city which is 30°. The two OTAs method of this paper is different from the commonly used method that suggests two TAs. The first TA is used for winter months which is obtained by adding 15° to the latitude angle while the second TA is obtained by subtracting 15° from the latitude angle for the summer months. This commonly used method produces lesser SR than the two OTAs method of this paper. The theoretical work has been proved by an experimental work on two PV systems constructed at 25° and 30° TAs. The results of the experimental work agree with the theoretical results.
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spelling pubmed-99683252023-02-27 Estimation of optimal tilt angles for photovoltaic panels in Egypt with experimental verifications Abdelaal, Ashraf K. El-Fergany, Attia Sci Rep Article The principal target of this work is to compute the optimal tilt angle (OTA) for Photovoltaic (PV) panels. To perform this task, comprehensive simulations are done starting from altering the tilt angle (TA) daily, to use one fixed TA for all the year. The mathematical models for extra-terrestrial radiation (ETR) of both horizontal and inclined surfaces are presented firstly. At a later stage, the optimization formulation for the maximizing the solar radiation (SR) is adapted, and then the daily, monthly, seasonally, half-yearly and optimal fixed TAs are obtained. Although, the daily OTA produces the maximum SR, it is costly and impractical. It is found that altering the TA twice a year at optimal values that are computed as 5° and 50° for Suez city, gives the best results that are very near to the daily altering of the OTA. The difference between the two methods is 1.56% which is very small. Also, the two OTAs has SR better than that of the fixed OTA which is 28° by 7.77%. Also, it is found that the yearly fixed OTA (28°) is nearly equal to the latitude angle of Suez city which is 30°. The two OTAs method of this paper is different from the commonly used method that suggests two TAs. The first TA is used for winter months which is obtained by adding 15° to the latitude angle while the second TA is obtained by subtracting 15° from the latitude angle for the summer months. This commonly used method produces lesser SR than the two OTAs method of this paper. The theoretical work has been proved by an experimental work on two PV systems constructed at 25° and 30° TAs. The results of the experimental work agree with the theoretical results. Nature Publishing Group UK 2023-02-25 /pmc/articles/PMC9968325/ /pubmed/36841921 http://dx.doi.org/10.1038/s41598-023-30375-8 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Abdelaal, Ashraf K.
El-Fergany, Attia
Estimation of optimal tilt angles for photovoltaic panels in Egypt with experimental verifications
title Estimation of optimal tilt angles for photovoltaic panels in Egypt with experimental verifications
title_full Estimation of optimal tilt angles for photovoltaic panels in Egypt with experimental verifications
title_fullStr Estimation of optimal tilt angles for photovoltaic panels in Egypt with experimental verifications
title_full_unstemmed Estimation of optimal tilt angles for photovoltaic panels in Egypt with experimental verifications
title_short Estimation of optimal tilt angles for photovoltaic panels in Egypt with experimental verifications
title_sort estimation of optimal tilt angles for photovoltaic panels in egypt with experimental verifications
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9968325/
https://www.ncbi.nlm.nih.gov/pubmed/36841921
http://dx.doi.org/10.1038/s41598-023-30375-8
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