GLOBAL SOLAR IRRADIATION AVERAGE MONTHLY (Hgm) AND DAILY ATMOSPHERIC TRANSMITTANCE (Ktd) OF THE INTERIOR (SERTÃO) OF ALAGOAS – BRAZIL
DOI:
https://doi.org/10.59627/cbens.2012.1852Keywords:
Solar Irradiation, Alagoas Interior (Sertão), Daily Atmospheric TransmittanceAbstract
This paper compares the temporal evolution of the mean monthly values of global solar irradiation (Hgm) (MJm-2) and daily atmospheric transmittance (ktd) between 2008 to 2009 in Água Branca, Pão de Açúcar and Santana do Ipanema areas located in the interior of the state of Alagoas. The global solar irradiation data were measured by pyranometers installed in solarimetric stations located in three locations. The daily atmospheric transmittance (ktd) was obtained from the ratio between daily global solar irradiance (Rgd) (Wm-2) and daily global solar irradiance at the top of the atmosphere (R0d) (Wm-2). We considered five ktd intervals to define the cloud cover in the sky. It was found in the Água Branca’s region maximum global solar irradiation (Hgm = 26,05 MJm-2) in november and minimum (Hgm = 13,11 MJm-2) in the month of june in 2008. In the Pão de Açúcar’s region was observed for the year 2008 range from 9,92 MJm-2, derived from the difference between the maximum (Hgm = 25,61 MJm-2) observed in November and minimum (Hgm = 15,69 MJm-2) in May. The Santana do Ipanema’s showed average values higher than Água Branca Hgm and smaller than Pão de Açúcar. Were noted to higher frequencies (ktd) for partially cloudy days, followed by the conditions of clear days, partly cloudy tending to clean, tending to partly cloudy overcast and cloudy, in the three regions. These results demonstrate the potential of solar energy incident on the Interior (Sertão) of the State of Alagoas
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References
Climanálise 2009 - Boletim de Monitoramento e Análise Climática, Cachoeira Paulista, SP, Brasil, INPE/CPTEC, v.24, n. 2.
Duffie, J., Beckman, W. A., 2006. Solar Engineering of Thermal Processes, John Wiley & Sons.
Iqbal, M., 1983. An introduction to solar radiation, New York, Academic Press.
Liu, B. Y., Jordan, R. C., 1960. The Interrelationship and Characteristic Distribution of Direct, Diffuse and Total solar radiation, Solar Energy, v.4, n.3.
Nicácio, R. M., 2002. Radiação Solar Global e Difusa para a Região de Maceió – AL: medidas e modelos, Dissertação de Mestrado, Instituto de Ciências Atmosféricas, ICAT/UFAL, Maceió.
Ricieri, R. P., 1998. Modelos de Estimativas e Avaliação dos Métodos e Medidas de Radiação Solar Difusa, Tese Doutorado, Faculdade de Ciências Agronômicas, UNESP, campus Botucatu, São Paulo.
Souza, J. L., Nicácio, R. M., Bernardo, S. O., Cavalcanti, E. A. B., 2000. Irradiância Solar e Transmitância Atmosférica na Região de Maceió-AL, XI CBMET - XI Congresso Brasileiro de Meteorologia, Rio de Janeiro.
Souza, J. L.; Nicácio, R. M.; Moura, M. A. L., 2005. Global solar radiation measurements in Maceió, Brazil, Renewable Energy. v. 30, p. 1203 – 1220.
Thornthwaite, C. W., Mather, J. R., 1955. The water balance, Centerton, NJ: Drexel Institute of Technology – Laboratory of Climatology, 104p, (Publications in Climatology, v.8, n.1).
Whillier, A., 1953. Solar Energy Collection and Its Utilization for House Heating, Thesis, MIT, Cambridge.
Whillier, A., 1956. The determination of hourly values of total radiation from daily summations, Arch. Met. Geoph. Biokl. Serie B, v.7, p.197-209
