ESTIMATION OF HOURLY GLOBAL SOLAR RADIATION IN EGYPT USING MATHEMATICAL MODEL | ||
| Misr Journal of Agricultural Engineering | ||
| Article 62, Volume 27, Issue 4, October 2010, Pages 2033-2047 PDF (734.63 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/mjae.2010.105401 | ||
| Author | ||
| Ahmed Tawfik Hussein Taha | ||
| Agricultural Engineering Department, Faculty of Agriculture, Minoufiya University, Shebin El-Kom, Egypt | ||
| Abstract | ||
| The main purpose of this paper is to develop a computer mathematical model which produces estimates of hourly average total solar radiation flux incident on the earth's surface under climate conditions of Delta, Egypt. Predictors for solar radiation have been developed because there is often a lack of representative solar radiation data in most countries. Cloudiness, atmospheric transmissivity, latitude and orientation of the Earth relative to the Sun, time of day, slope and aspect of the surface determine the spatial and temporal distribution of irradiance incident on a surface. Measured data were collected from the Solar-Meteorological stations of Agricultural Engineering Department at El-menoufiya University, El-Mansoura university and Belbees, in order to evaluate the present model. A comparison study between measured and predicted data has been carried out based on the main bias error and correlation coefficient. It can be concluded that the present model can be used to estimate the hourly average total solar radiation for El-menoufiya, El-Mansoura, and Belbees with an excellent agreement | ||
| Keywords | ||
| Global radiation models; Solar radiation; Mathematical Model | ||
| References | ||
|
Chegaar, M. and A. Chibani, ( 2001). Global solar radiation estimation in Algeria. Energy Conversion and Management 42, 967–973.
Decarli, F., C. Groppi, R. Festa, and C. F. Ratto, (1986). Procedure to obtain global radiation maps from sunshine duration at isolated station in a region with complex orography . Solar Energy ,37 (2):91-108.
Dorvlo, A. S. S. , J. A. Jervase and A. Al-Lawati (2002). Solar radiation estimation using artificial neural networks. Appl Energy;71:307–19
Duffle, J.A. and W.R. Beckman, (2006). Solar engineering for thermal processes. 3rd ed., John Wiley and Sons. Inc., New York. NY.
Elminir, H. k., A.E Ghitas, F. El-Hussainy, F. Hamid, M.M. Beheary, and K.M. Abdel-Moneim, (2006). Optimum solar flat-plate collector slope:Case study for Helwan. Egypt Energy Conversion and Management,47 :624–637
El-Sebaii, A. A. and A. A. Trabea,( 2003). Estimation of horizontal diffuse solar radiation in Egypt. Energy Conversion and Management; 44, 2471–2482.
El-Sebaii, A. A. and A. A. Trabea,( 2005). Estimating global solar radiation on horizontal surfaces over Egypt. Egyptian Journal of Solids; 28, 163–175.
El-Metwally, M.(2005). Sunshine and global solar radiation estimation at different sites in Egypt. Journal of Atmospheric and Solar-Terrestrial Physics; 67 :1331–1342.
Gopinathan, K. K.( 1992). Estimation of hourly global and diffuse solar radiation from hourly sunshine duration. Solar Energy; 48(1):3.
Gopinathan, K.K., (1988). A general formula for computing the coefficients of the correlation connecting global solar radiation to sunshine duration. Solar Energy, 41, 499–502.
Halouani, N., C.T. Nguyen and D. Vo-Ngoc, (1993). Calculation of monthly average global solar radiation on horizontal surfaces using daily hours of bright sunshine. Solar Energy, 50, 247–258.
Heindl, W. and H.A. Koch, (1976). Die Berchnung von Sonneneinstrahlungsintensitäten für wärmetechnische Untersuchungen im Bauwesen. Gesundheits -Ingenieur, 97 H.12,301-314.
Hottel,H. C. ( 1976) . A simple model for eastimating the transmittance of direct solar radiaton through clear atmospheres. Solar Energy .18(2):129-134.
Ibrahim, S. M. A.( 1985). Predicted and measured global solar radiation in Egypt. Solar Energy;35(2):185-8.
Jacovides, C.P., F.S. Tymvios, V.D. Assimakopoulos, and N.A. Kaltsounides, (2006).Comparative study of various correlations in estimating hourly diffuse fraction of global solar radiation. Renewable Energy ,31, 2492–2504.
Liu, B. H. Y. and R. C. Jordan, (1963). The long-term Average Performance of Flat-plate Solar Energy Collectors. Solar energy, 7,53
Palm, W. J. (1999). Matlab for engineering applications. WCB, McGraw-Hill.
Parker, B.F. (1991). Energy in World Agriculture, Solar energy in Agriculture. Elsevier Science Publishers, New York, 1-66.
Sen, Z. (2008). Solar Energy Fundamentals and Modeling Techniques, atmosphere, environment, climate change and renewable. Springer-Verlag London Limited.
Tadros, M. T. Y.(2000). Uses of sunshine duration to estimate the
global solar radiation over eight meteorological stations in Egypt . Renewable Energy, 21 : 231-246.
Trabea, A.A. and M. A. Mosalam Shaltout, (2000). Correlation of global solar radiation with meteorological parameters over Egypt. Renewable Energy, (21) :297-308. | ||
|
Statistics Article View: 192 PDF Download: 710 |
||
