RADIAÇÃO SOLAR NA REGIÃO DE MACEIÓ, ALAGOAS
DOI:
https://doi.org/10.59627/cbens.2008.1354Keywords:
Global solar radiation, diffuse solar radiationAbstract
The solar irradiance, in Maceió - Al (9 o 40' S, 30o 42' W, 65m asl), was characterized through the monitoring of the components global solar irradiance (Rg ), diffuse solar irradiance (R d), and irradiance in the top of the atmosphere (Ro ). The measures of the components global and diffuse solar irradiance, had been gotten through piranômetros KIPP & ZONEN, models CM5, being one coupled to shadow ring, on to a " Micrologger 21XL ", programmed to make a measure to each five seconds and to store average of five minutes. The irradiance in the top of the atmosphere (Ro), was calculated in function of the solar constant (So = 1367 W.m -2 ), of the ray vector of the terrestrial orbit, of the local latitude, the declination and hourly angle of the sun. The variation of global the solar irradiation (H g) daily, for days with sky clearly was of approximately 5.3 kWh m -2 in 07 June the 7.7 kWh m -2 in 05 of December. .The sky conditions par tially cloudy in relation the da ys clear attenuated in average the solar irradiation in 28%. The ratio Rg / R o had average of the maximums, in three days of comment with sky clear, of 75%.
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References
Duchon, C.E. O’Malley, M.S.1999. Estimating cloud type from pyranometer observations, Journal of Applied Meteorology, vol.38, pp.132–141.
GU, L., FUENTES, J. D., GARSTANG, M., SILVA, J. T., Heitz, R., Sigley, J., Shugar, H.H. 2001. Cloud modulation of surface solar irradiance at a pasture site in southern Brazil. Agricultural and Forest Meteorology, vol. 106, pp. 117–129.
Iqbal, M., 1983. An intruduction to solar radiation, New York: Academic Press.
Kondratyev, K. Y., 1966, Radiation in the atmosphere, London: Academic Press.
Melo, J.M.D, 1993. Desenvolvimento de um sistema para medir simultaneamente Radiações Global, Difusa e Direta, Tese de Doutorado, Faculdade de Ciências Agronômicas (UNESP), Botucatu.
Monteith, J. L., 1973. Principles of environmental plysics, London: Edward Arnold.
Pereira E.B., Abreu SL, Stuhlmann R. 1996. Survey of the incident solar radiation in Brazil by use of Meteosat Satellite data. Solar Energy, vol. 57, pp.125-132.
Pereira, E.B., Colle S. 1997. A energia que vem do Sol. Ciência Hoje, pp.22:24-35 (in Portuguese).
Oliveira, A.P., Escobedo, J.F., Machado, A.J., 2002. A new shadow-ring device for measuring diffuse solar radiation at the surface, Journal of Atmospheric and Oceanic Technology, vol.19, n. 5, pp. 698-708.
Oliveira, A.P., Machado, A.J., Escobedo, J.F., Soares, J., 2002. Diurnal evolution of solar radiation at the surface in the city of São Paulo: seasonal variation and modeling. Theor. Appl. Climatol. vol.71, pp.231-249
Rosenberg, N. J., Blad, B. L., Verma, S. B., 1983. Micr oclimate: the biological environment, 2.ed. New York: John Wiley.
SEGAL, M.; DAVIS, J. 1992. The impact of deep cumulus reflection on the ground-level global irradiance. Journal Applied Meteorology, vol.31, pp.217-222.
Souza, J.L., Nicácio, R.M., Moura, M.A.L. 2005. Global solar radiation measurements in Maceió, Brazil. Renewable Energy, vol.30, pp.1203-1220.
Tiba, 2001. solar radiation in the Brazilian Northeasth. Renowable Energy, vol.22, pp.565-576.
