Estimation of Global Solar Radiation and Clearness Index in Coast of Gulf of Guinea, Nigeria

Document Type : Original Article

Authors

1 Department of Physics and Solar Energy, Faculty of Science, Bowen University, Iwo, Nigeria

2 Department of Computer Science and Information Technology, Bowen University, Iwo, Nigeria

Abstract

The concept of solar energy and its applications in present day would come to be one of the solutions to our Nigerian problem of instability and epileptic power supply. In this study, data for mean monthly sunshine hours  and global solar radiation  for Ikeja, Lagos state capital (6.580N, 3.320E) were obtained from Nigeria Metrological Agency (NiMeT), Oshodi Lagos, Nigeria and spanned 1996 to 2010. The data for global solar radiation were measured using a Gunn-Bellani radiometer. A linear regression correlation model was developed for Ikeja and other surrounding area in south-western part of Nigeria with similar meteorological conditions. The results of estimated global solar radiation ranged from 5.1 MJm-2 day-1 on average for August and 13.1 MJm-2 day-1 for March for Lagos. The Angstrom constants a and b of Angstrom-type correlation to estimate monthly average global solar radiation was estimated to be 0.25 and 0.63 respectively. The result for global solar radiation were then subjected to statistical tests [MBE, RMSE, MPE] and proved to be good estimates. The value of clearness index was also estimated to range from 0.31 to 0.59 showing Lagos as a partly clear sky city.

Keywords

References

1.     Salima, G. and Chavula, G.M., 2012, Determining Angstrom constants for estimating solar radiation in Malawi, International Journal of Geosciences, 3(2), pp. 391–397.
2.     Umoh, A.A., Akpan, A.O. and Jacob, B.B., 2013, Rainfall and relative humidity occurrence patterns in uyo metropolis, Akwa Ibom state, South-South Nigeria, IOSR Journal of Engineering, 3(8), pp.27-31.
3.     Innocent, A.J., Jacob, O.E., Chibuzo, G.C., James, I. and Odeh, D.O., 2015, Estimation of Global Solar Radiation in Gusau, Nigeria, International Journal of Research in Engineering & Technology, 3(2), pp.27-32.
4.     Musa, B., Zangina, U. and Aminu, M., 2012, Estimation of global solar radiation in Maiduguri, Nigeria using Angstrom model, ARPN Journal of Engineering and Applied Sciences, 7(12), pp.1623-1627.
5.     Ekpe, J.E. and Nnabuchi, M.N., 2012, Solar radiation in Onitsha: A correlation with average temperature, Scholarity Journals of Biotechnology, 1(5), pp.101-107.
6.     Yusuf, A., 2017, Characterization of sky conditions using clearness index and relative sunshine duration for Iseyin, Nigeria. International Journal of Physical Sciences Reseach, 1(1), pp.53–60.
7.     Ogunsanwo, F.O., Adepitan, J.O., Ozebo, V.C. and Ayanda, J.D., 2016, Empirical model for estimation of global radiation from sunshine duration of Ijebu-Ode, International Journal of Physical Sciences, 11(3), pp.32-39.
8.     Sanusi, Y. K. and Ojo, A. M. O., 2015, Evaluation of Clearness Index and Diffuse Ratio of Some Locations In South Western, Nigeriausing Solar Radiation Data, IOSR Journal of Applied Physics, 7(5), pp.45–51.
9.     Namrata, K., Sharma, S.P. and Saksena, S.B.L., 2012, Comparison of estimated daily global solar radiation using different empirical models, International Journal of Science and Advanced Technology, 2(4), pp.132-137.
10.   Muzathik, A.M., Nik, W.B.W., Ibrahim, M.Z., Samo, K.B., Sopian, K. and Alghoul, M.A., 2011, Daily Global Solar Radiation Estimate Based on Sunshine Hours, International journal of mechanical and materials engineering, 6(1), pp.75-80.
Iranica Journal of Energy & Environment
Volume 10, Issue 3
September 2019
Pages 211-215

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