A clear sky irradiation assessment using a modified Algerian solar atlas model in Adrar city

Marif, Yacine; Chiba, Younes; Belhadj, Mohammed Mustapha; Zerrouki, Moussa; Benhammou, M.

doi:10.1016/j.egyr.2017.09.002

Cited by 14 publications

(10 citation statements)

References 22 publications

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“…We can explain it by winds of the south sectors (Sirocco) during the summer season that characterize the Sahara of North Africa. This kind of winds brings particles of dust and sand with them, which increases the Angström coefficient [1,19,20,32,41].…”

Section: Resultsmentioning

confidence: 99%

“…We note that there is a temporal extremum of β (middle plot in Figure 8) while there is an extremum in both humidity and temperature at the same time (bottom plot in Figure 9). These seasonal variations are most likely related to the African monsoon [1,20,32,41,42]. ± 0.04 0.12 ± 0.05 0.15 ± 0.04 0.11 ± 0.03 September 0.14 ± 0.05 0.13 ± 0.04 0.11 ± 0.06 0.11 ± 0.06 0.12 ± 0.03 0.14 ± 0.04 October 0.12 ± 0.05 0.14 ± 0.04 0.09 ± 0.04 0.09 ± 0.04 0.14 ± 0.04 0.16 ± 0.08 November 0.12 ± 0.06 0.13 ± 0.05 0.02 ± 0.03 0.02 ± 0.02 0.14 ± 0.05 0.11 ± 0.04 December 0.11 ± 0.03 0.11 ± 0.05 0.03 ± 0.05 0.03 ± 0.03 0.12 ± 0.06 0.11 ± 0.05 Finally, we compared the Angström coefficient obtained with ESRA 2 model with the frequency of occurrence of aerosols over Tamanrasset observed from space.…”

Section: Resultsmentioning

confidence: 99%

“…This model is essentially produced for Algeria in the Algerian solar atlas [31][32][33]. The Linke turbidity used by the model is a combination of atmospheric turbidity due to water vapor absorption, molecular diffusion, and aerosol diffusion associated with some slight absorption [32,33]. This model is based on the theoretical approach of Perrin de Brichambaut and Vauge [34].…”

Section: The Capderou Modelmentioning

confidence: 99%

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Study of Atmospheric Turbidity in a Northern Tropical Region Using Models and Measurements of Global Solar Radiation

et al. 2021

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Radiative transfer in the Earth’s atmosphere under clear-sky conditions strongly depends on turbidity due to aerosols and hydrometeors. It is therefore important to know its temporal radiative properties for a given site when the objective is to optimize the solar energy that is collected there. Turbidity can be studied via measurements and models of the global solar radiation reaching the ground in cloudless conditions. These models generally depend on two parameters, namely the Angström turbidity coefficient and the Linke factor. This article aims to do a comparative study of five models of global solar radiation, all dependent on the Linke factor, based on real data. The measurements are provided by the Tamanrasset Meteorological Center (Algeria), which has a long series of global solar radiation data recorded between 2005 and 2011. Additional data from AERONET and MODIS onboard the TERRA satellite were also used to perform the comparison between the two estimated parameters and those obtained from AERONET. The study shows that the ESRA models are the most reliable among the five models for estimating the Linke factor with a correlation coefficient R of the data fits of 0.9995, a RMSE of 13.44 W/m2, a MBE of −0.64 W/m2 and a MAPE of 6.44%. The maximum and minimum statistical values were reached, respectively, in June and during the autumn months. The best correlation is also observed in the case of ESRA models between the Linke parameter and the joint optical thickness of aerosols and the total column-integrated water vapor. The Angström turbidity coefficient β, calculated from the Linke factor and MODIS data, has values less than 0.02 at 9% of the cases, and 76% present values ranging between 0.02 and 0.15 and 13% higher than 0.15. These β values are validated by AERONET measurements since a very good correlation (R≈0.87) is observed between the two datasets. The temporal variations of β also show a maximum in June. Satellite observations confirm more aerosols during the summer season, which are mostly related to the African monsoon.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: The Capderou Modelmentioning

confidence: 99%

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Study of Atmospheric Turbidity in a Northern Tropical Region Using Models and Measurements of Global Solar Radiation

et al. 2021

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“…where k is the real attenuation coefficient and k 0 is the attenuation coefficient in pure atmosphere. Kasten has defined this factor as [22]:…”

Section: Linke Turbidity Factormentioning

confidence: 99%

Comparative Study of Experimentally Measured and Calculated Solar Radiations for Two Sites in Algeria

et al. 2021

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This paper presents a comparison study between the measured solar radiations on site and the calculated solar radiation based on the most theoretical models presented in the literature up to date. Indeed, for such purposes, this paper focusses on the analysis of the data of the measured solar radiation collected on two sites in Algeria such as Tlemcen (34°52′58″ N 01°19′00″ W, elevation 842 m) and Senia (35°39′ N 0°38′ W, elevation: 77 m). In order to check the accuracy of the proposed model, the experimental collected data of the solar radiation obtained from the existing radiometric stations installed at the two locations under investigation, are compared with the estimated or predicted solar radiations obtained from the Capderou and R.Sun models, where four days under clear skies are selected from different seasons to achieve this comparison. Second, the daily averages of the experimental global solar irradiation are compared to those predicted by Mefti model for both the sites. Finally, a validation is carried out based on the obtained experimental monthly global irradiations and with those estimated by Coppolino and Sivkov models. A relative difference is used in this case to judge the reliability and the accuracy of each model for both sites.

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“…parameters. The first theoretical model was suggested by Capderou (1987), thereafter many researches (Gairaa, Benkaciali, & Guermoui, 2019;Marif, Chiba, Belhadj, Zerrouki, & Benhammou, 2018;Behar, Khellaf, & Mohammedi ,2015) were recorded about the assessment of theoretical models in Algeria. The previous models are limited by their complexity, independent models are relatively easy.…”

Section: Introductionmentioning

confidence: 99%

Simplified Independent Model for Predicting Global Solar Radiation

Marif¹,

Fekih²,

Rachedi³

2022

JSD

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In this investigation, five existing independent empirical models were calibrated and evaluated to calculate daily and monthly mean global solar radiation on a horizontal surface in Adrar city located in the south of Algeria, using meteorological data measured from 2013 to 2018. The measured data were divided into two periods; the first period (2015-2018) was used to calculate the empirical coefficients of the models, while the second period (2013-2014) was used to validate the correlations. Additionally, the best model (Al-Salaymeh model) was compared with five dependent empirical extreme air temperature models. In general, the results show that dependent models exhibited privileged performance than independent models. However, Al-Salaymeh regression independent model can contend with regression dependent models. Because of they use only the day number as a key input with smaller relative errors. It is found that daily statistical tests mean absolute bias error, root mean square error and coefficient of determination were equal to 2.0117 MJ/m², 2.4612 MJ/m² and 0.8014 respectively. The best independent empirical model was also compared with the modified Algerian solar atlas model to show their effectiveness. As a conclusion, the simple independent models can satisfactorily describe the horizontal global solar radiation for Adrar.

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A clear sky irradiation assessment using a modified Algerian solar atlas model in Adrar city

Cited by 14 publications

References 22 publications

Study of Atmospheric Turbidity in a Northern Tropical Region Using Models and Measurements of Global Solar Radiation

Study of Atmospheric Turbidity in a Northern Tropical Region Using Models and Measurements of Global Solar Radiation

Comparative Study of Experimentally Measured and Calculated Solar Radiations for Two Sites in Algeria

Simplified Independent Model for Predicting Global Solar Radiation

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