Correlation formulation for optimum tilt angle for maximizing the solar radiation on solar collector in the Western Himalayan region

Sharma, Ashutosh; Kallioğlu, Mehmet Ali; Awasthi, Anchal; Chauhan, Ranchan; Fekete, Gusztáv; Singh, Tej

doi:10.1016/j.csite.2021.101185

Cited by 32 publications

(15 citation statements)

References 38 publications

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“…Yadav et al 13 suggested a method to compute the OPT in the presence of houses shadow. Similar objectives could be found in 14 – 16 . Mansour et al 17 , a similar study to get the OTA for different cities in Saudi Arabia.…”

Section: Introductionsupporting

confidence: 77%

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

Abdelaal

El‐Fergany

2023

Sci Rep

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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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Section: Introductionsupporting

confidence: 77%

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

Abdelaal

El‐Fergany

2023

Sci Rep

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“…Reference [13] suggested a method to compute the OPT in the presence of houses shadow. Similar objectives could be found in [14][15][16]. In [17], a similar study to get the OTA for different cities in Saudi Arabia .In [18], Tiris and Tiris tried to compute the OTA of a collector system depending on the highest SR.…”

Section: Introductionmentioning

confidence: 92%

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

Abdelaal

El‐Fergany

2022

Preprint

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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 5o and 50o 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 28o by 7.77%. Also, it is found that the yearly fixed OTA (28o) is nearly equal to the latitude angle of Suez city which is 30o. 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 15o to the latitude angle while the second TA is obtained by subtracting 15o 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 25o and 30o TAs. The results of the experimental work agree with the theoretical results.

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“…The percentage gain of total solar radiation on a tilted surface compared to the horizontal surface is calculated by equation ( 28) [38]:…”

Section: Timementioning

confidence: 99%

Development of Optimal Tilt Angle Models of a Photovoltaic Module for Maximum Power Production: Ethiopia

Ashetehe

Gessesse

Shewarega

2022

International Journal of Photoenergy

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The power generated from the photovoltaic module is directly related to the magnitude of total incident solar radiation on the surface of the solar module. The total incident solar radiation depends on the location, tilt angle, and orientation of the solar module. In this paper, generic models were developed that determine the seasonal and annual optimal tilt angle of the Photovoltaic module at any location in Ethiopia without using meteorological data. Both isotropic and anisotropic diffuse solar radiation models were used to estimate monthly, seasonal, and annual optimal tilt angles. The monthly average daily global horizontal solar radiation for a total of 44 cities -32 for training and 12 for testing were obtained from the National Aeronautical and Space Administration database, and algorithms were developed and implemented using MATLAB and R programming software to obtain optimum tilt angle and regression models. The study showed that the developed model accurately estimates the optimal tilt angle with the minimum statistical validation errors. It is also found that 5.11% to 6.275% (isotropic) and 5.72% to 6.346% (anisotropic models) solar radiation energy is lost when using the yearly average fixed optimal tilt angle as compared with the monthly optimal tilt angle. The result of this study was also validated by comparing it with the previously published works, PVGIS and PVWatt online software. The graphical abstract is included in the supplementary file.

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Correlation formulation for optimum tilt angle for maximizing the solar radiation on solar collector in the Western Himalayan region

Cited by 32 publications

References 38 publications

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

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

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

Development of Optimal Tilt Angle Models of a Photovoltaic Module for Maximum Power Production: Ethiopia

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