Global, diffuse and direct solar radiation at the surface in the city of Rio de Janeiro: Observational characterization and empirical modeling

The city of Rio de Janeiro and others 18 cities compose the Metropolitan Area of Rio de Janeiro. The main objective of this work is to characterize observationally the diurnal and seasonal evolution of the solar radiation components in the city of Rio de Janeiro. The measurements of global and diffu...

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Vydáno v:Renewable energy Ročník 91; s. 64 - 74
Hlavní autoři: Marques Filho, Edson P., Oliveira, Amauri P., Vita, Willian A., Mesquita, Francisco L.L., Codato, Georgia, Escobedo, João F., Cassol, Mariana, França, José Ricardo A.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Elsevier Ltd 01.06.2016
Témata:
Brazil
cities
Correlation
Diffuse solar fraction model
Estimates
Local climate conditions
Mathematical models
Metropolitan areas
microclimate
Renewable energy
Rio de Janeiro
solar energy
Solar radiation
Solar radiation components
spring
Summer
winter
Brazil, Rio de Janeiro
Brazil
Diffuse solar fraction model
Rio de Janeiro
Solar radiation components
Local climate conditions
ISSN:0960-1481, 1879-0682
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Shrnutí:The city of Rio de Janeiro and others 18 cities compose the Metropolitan Area of Rio de Janeiro. The main objective of this work is to characterize observationally the diurnal and seasonal evolution of the solar radiation components in the city of Rio de Janeiro. The measurements of global and diffuse solar radiation and standard meteorological variables at the surface have been carried out regularly at the Geoscience Institute of Federal University of Rio de Janeiro since October of 2011. The microclimatic conditions show that the period 2011–2014 was warmer during most of the year and drier in summer and spring in comparison with climate normal. All solar radiation components present a well defined diurnal cycle with maximum at noon. The estimates of global and direct solar radiation indicate a great potential available for solar energy at the surface, particularly in summer. The behavior of the clearness index and diffuse solar radiation fraction is similar in summer and winter. The Angstrom formula represents properly the estimate of the monthly average daily value of global solar radiation. The sigmoid logistic function is statistically more significant in comparison with others correlation models to represent the diffuse fraction as a function clearness index. •Observational characterization of the solar radiation components at surface.•Angstrom formula represents properly the monthly average of global solar radiation.•The sigmoid function is adequate to estimate the hourly diffuse fraction.
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ISSN:0960-1481
1879-0682
DOI:10.1016/j.renene.2016.01.040