Empirical Model for Estimating Global Solar Radiation on Horizontal Surfaces for Selected Cities in the Six Geopolitical Zones in Nigeria

Okundamiya, Michael S.; Nzeako, A. N.

doi:10.1155/2011/356405

Cited by 34 publications

(32 citation statements)

References 17 publications

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“…The applicability of Equation (6) was tested by a comparison with the simple temperature-based model previously proposed (Okundamiya and Nzeako 2010). Results showed that Equation (6) compares more favorably with observed data for considered locations in Nigeria (Okundamiya 2014).…”

Section: Okundamiya Modelmentioning

confidence: 98%

“…In the absence of sunshine data, cloud-based models can be a useful alternative but are sensible to human biasing (Supit and Van Kappel 1998;Badescu 1999). The temperature-based models can be a convenient way if calibrated for a particular location (Hargreaves and Samani 1982;Allen 1997;Chen et al 2004;Okundamiya and Nzeako 2010;Almorox, Hontoria, and Benito 2011). The hybrid-parameter-based model is reported to predict the solar radiation on a horizontal surface with a high degree of accuracy (Supit and Van Kappel 1998;Menges, Ertekin, and Sonmete, 2006), but most of their input parameters are not readily available at most locations of interest (Besharat, Dehghan, and Faghih 2013).…”

Section: Studied Modelsmentioning

confidence: 99%

“…Okundamiya and Nzeako (2010) suggested a simple method based on air temperature for estimating the global solar radiation on a horizontal surface for the six geopolitical zones in Nigeria. Results showed that the accuracy of estimates from proposed model could improve if additional meteorological parameters are included in the proposed model.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of various global solar radiation models for Nigeria

Okundamiya

Emagbetere

Ogujor

2015

International Journal of Green Energy

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This study assessed the performance of six solar radiation models. The objective was to determine the most accurate model for estimating global solar radiation on a horizontal surface in Nigeria. Twenty-two years meteorological data sets collected from the Nigerian Meteorological agency and the National Aeronautics and Space Administration for the three regions, covering the entire climatic zones in Nigeria were utilized for calibrating and validating the selected models for Nigeria. The accuracy and applicability of various models were determined for three locations (Abuja, Benin City, and Sokoto), which spread across Nigeria using seven viable statistical indices. This study found that the estimation results of considered models are statistically significant at the 95% confidence level, but their accuracy varies from one location to another. However, the multivariable regression relationship deduced in terms of sunshine ratio, air temperature ratio, maximum air temperature, and cloudiness performs better than other relationships. The multivariable relationship has the least root mean square error and mean absolute bias error, not exceeding 1.0854 and 0.8160 MJ m −2 day −1 , respectively, and monthly relative percentage error in the range of ± 12% for the study areas.

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Section: Okundamiya Modelmentioning

confidence: 98%

Section: Studied Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluation of various global solar radiation models for Nigeria

Okundamiya

Emagbetere

Ogujor

2015

International Journal of Green Energy

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“…For the place of Babylon city and these constants has a no unit. When we take the climatic inductions on the incidence solar radiation (degree of temperature and the relative of humidity), we will get the following equations [7], [8], [9]: …”

Section: The Effect Of Change In Temperature and Relativity Of Moistnmentioning

confidence: 99%

The effect of the climate's elements on the sun radiation in Babylon for 2013

Ibrahem¹,

Mohammed²

2015

IJBAS

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In this study special equations had used for calculation the quantity of the solar radiation which incident perpendicular on the Babylon city, the benefit of this study is exploitation the solar energy by solar cell to get the electricity. The data of the weather from the meteorological station in College of Education for pure sciences contains the information of the Monthly average of the Solar Radiation with absence atmosphere , the Monthly Average of the theoretical solar radiance and Relative Air Mass from 1/ January / 2013 to 31/ August / 2013. The results of this study explains the effects of the climate's elements (degree of temperature and the relative of humidity), on the solar Radiation. In this study I will discover that we can transform the solar radiation in the Babylon city to the electricity by using the solar cells.

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“…In the absence of these data, one has to rely on available methods of estimation as well as developing new ones. The availability of such data will encourage possible analysis of application and efficient utilization of solar energy in order to control GHC emissions [ [16], [23], [1], [10]]. …”

Section: Introductionmentioning

confidence: 99%