Temperature Based Models for Determining Solar Radiation in the Savannah Region
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Abstract
Due to erratic power supply, effort towards the development of alternative energy system is increasing on a daily basis. The quantity of radiation is essential for efficient designing and selecting energy devices for agricultural, industrial, telecommunication and household uses. It requires knowledge of the actual solar radiation (SR) reaching the earth’s surface at the location of interest. In this study, temperature-based methods to determine SR in the savannah region using Abuja (9.050N, 7.490E). Nigeria as a case study was conducted. Hargreaves-Samani, Annandale and Samani models were analyzed and compared with ten years data on SR, and temperatures from 2001 to 2010 from Nigerian Meteorological Agency, NIMET Abuja. The solar declination δ, eccentricity correction factor of the earth’s orbit Eo, and day angle (0) were determined to estimate extraterrestrial SR on a horizontal surface. The models were tested in terms of the mean bias error (MBE), root mean square error (RMSE) and the percentage RMSE. The results revealed Hargreaves-Samani is the most fitted followed by Annandale while Samani model is not applicable due to proximity to large water bodies. The extraterrestrial and SR continuously decreases during summer due to absorption, scattering, reflection and transmission by clouds, ozone layer, water vapour, carbon dioxide, smog and other particles while their values increases drastically during winter in agreement with other research findings.
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Nwoke O. Okala, Uzoma C. Chigasa, Ibeto Cynthia, Okpara Chidimma, Nnaji Chibueze, Obi I. Onuoragbunam, Oparaku U. Ogbonna, (2011) Analysis and survey of The Application of Solar Dryers In Eastern Nigeria Int J Agric & Biol Eng Vol. 4 No.3 p 79
Chiemeka I. U (2008), Estimation of solar radiation at Uturu, Nigeria Intl Jnl of Physical Sciences V.3 (5), p 126-130
Hassan I. and M. Y. Onimisi (2013), Assessment of the Global Solar Energy Potential at Nigerian Defence Academy, Permanent Site Afaka Kaduna, Nigeria American Chemical Science Journal 3(3): 232-246
Ainah Priye Kenneth, Afa Tarilanyo John (2013) “Estimation of hourly solar radiation on an incline south facing surface in Port Harcourt city, Nigeria International Journal of Scientific & Engineering Research Volume 3, Issue 12, 1-4
Sanusi Y.K, Abisoye S.G and Abiodun, A.O (2013), Application of Artificial Neural Networks to Predict Daily Solar Radiation in Sokoto Intl Journal of Current Eng and Tech. 1-3
Yakubu D. and Medugu D. W., (2012), Relationship Between The Global Solar Radiation And The Sunshine Duration In Abuja, Nigeria, Ozean Journal of Applied Sciences 5(3), 1-5
Osueke C. O., P. Uzendu, I. D. Ogbonna (2013); Study and Evaluation of Solar Energy Variation in Nigeria, International Journal of Emerging Technology and Advanced Engineering Certified Journ, Volume 3, Issue 6, p 1-3
ICEED Nigeria (2006), Renewable Electricity Action Program, Federal Ministry of Power And Steel, Federal Republic of Nigeria, Garki II – Abuja, 1-5
Okoye A.C, Dioha I. J, Ezeonu F.C., Eboatu A.N. and Onuegbu T. U., (2011) Energy Crisis and Attendant Poverty and Environmental Problems: The Role Of Renewable Energy Nigeria Journal of Solar Energy, Vol. 22, 2011 pg.138-143
Ezekoye B. A., V. A. Ezekoye1, P. O. Ike, A C. Nwanya; (2011), Estimating Monthly Solar Radiation Of Nsukka Using Some Temperature Based Radiation Models Nigeria J of Solar Energy, Vol. 22, 2011 p 67-68
Osuji R.U, (2010) “Energy Systems and Designs” Lecture Materials, UNN, Nsukka, Nigeria (unpublished)
Malgwi, D. I and Ladan H. A, (2005) “Energy and Environmental Physics” Lecture Materials, University of Maiduguri, Nigeria (unpublished)
Adelabu, J.S.A, (2011) “Solar and Renewable Energy” Lecture Materials, Department of Physics, University of Abuja, Nigeria (unpublished)
Nigerian Meteorological Agency NIMET, (2012) Nig. Climate Review, Abuja 25-26
Hargreaves G.H, Samani Z. A., (1985) Reference Crop Evapo transpiration From Tem. Appl. Eng. Agric. 1, 96-99.
Igbal Muhammed (1983) An Introduction to solar radiation, Academic press New York, 1-84
Abdul-Malik Ismail, Idris Garba, Tijani B. N, (2009) Renewable Energy App. in Nig. Int’l J. of Eng. Sci. Vol 1(2) 1-10
Nwankwo S. N, Nnabuchi M. N and Ekpe J.E, (2012) Construction And Characterization of a Pyranometer Using Locally Available Materials For Global Solar Radiation Measurement Asian Transactions on Basic and Applied Sciences Vol. 02 Issue 04 Pp. 1-4
Ogunleye, I.O and Awogbemi, O. (2010), Constraints to the use of solar photovoltaic as a sustainable power source in Nigeria, American J. of Scientific and Industrial Research p.1-5.