Multivariable Empirical Equation for Estimating Global Solar Radiation of Sokoto, Nigeria

Muhammad Bello Abdullahi, Sharafa S. B.

Abstract


The global solar radiation is essential in the study, estimation and design of the economic viability of the systems which use solar energy. Correlations are commonly used to estimate average daily global solar radiation for regions where no actual measured values are available using more readily available meteorological, climatological, and geographical parameters. In this study, we proposed a model based on modified Angstron-Prescott model including multiple climatic parameters for the estimation of global solar radiation (GSR) in Sokoto region. Averaged data of sunshine, wind speed, relative humidity, maximum temperature and cloud cover for a period of five years (2006 -2010) was used to evaluate GSR of the study location. Result shows an excellent agreement between the measured and estimated values demonstrating good correlation coefficient(r=0.992165) and coefficient of determination (R2=0.984391).The values obtained from RMSE, MBE and MPE statistical indicators were all close to zero hence the model is recommended for estimating GSR in the study location.


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References


Angstrom, A. (1924). Solar and terrestrial radiation, Quarterly Journal of Royal Meteorological Society, 50: 121–12.

Augustine, C and Nnabuchi, M.N. (2009). Correlation Between sunshine Hours and Global Solar Radiation in Warri, Nigeria. Pacific Journal of Science and Technology, 10(2), 574-579.

Duffie, J. A. and Beckman, R.W. (1994). Solar Engineering of Thermal Processes, 2nd Ed., John Wiley, New York, pp. 40-41.

El- Sebaii, A and Trabea, A.(2005). Estimation of Global Solar Radiation on Horizontal Surface Over Egypt , Egypt . J. Solids, 28(1), 163-175.

Falayi, E. O., Rabiu, A. B. and Teliat R. O. (2011). Correlations to estimate monthly mean of daily diffuse solar radiation I some selected cities in Nigeria, Adv in Appl Sci Res; 2(4): 480-490

Kerr, A and Tabony, R. (2004). Comparison of sunshine Recorded by Campbell-Strokes and automatic sensors. Weather. Volume 59. Pp. 90-95.

Namrata, K., Sharma, S. P. and Sakseena S. B. L. (2012). Comparison of Estimated Daily Global Solar Radiation using Different Empirical Models, Int Journal of Sci and Adv Tech; 2(4): 132-137.

Ogolo, E.O. (2014). Estimation of global solar radiation in Nigeria using a modified Angstrom model and the trend analysis of the allied meteorological component, Indian Journal of Radio and Space Physics Vol 43 : 213-224.

Okundamiya, M. S. and A. N. Nzeako (2010). Empirical model for estimating global solar radiation on horizontal surfaces for selected cities in the six geopolitical zones in Nigeria,†Research Journal of Applied Science, Engineering and Technology, 2( 8): 805 – 812.

Swartman R. K. and O. Ogunlade (1967). Solar radiation estimates from common parameters, Solar Energy, 11:170-172.

Tijjani, B. I. (2011). Comparison between First and Second order Angstrom Type Models for Sunshine Hours of Katsina, Nigeria. Bayero Journal of Pure and Applied Sciences. 4(2): 24-27.

Ugwu, K. and Ugwanyi T.A(2011). Construction of Quadratic model using Modified Angstrom Coefficient to Estimate Global Solar Radiation. Solar Energy volume. 45. Pp.85-92.

Udounwa, A. E., Wansah, J. F. and Victor, G. I. (2013). Estimation of Monthly Average Daily Global Solar Radiation using Sunshine Hours at Uyo, Nig Journal of Solar Energy, , 24: 18-22.


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