Solar Radiation Estimation under Clear Sky Conditions for Brasov Area (Romania) - Linke Turbidity Factor
Journal Title: RECENT - Year 2012, Vol 13, Issue 35
Abstract
The determination of solar radiation is important for solar renewable systems design. The solar radiation is dependent on several factors such as, latitude and altitude location, season, day, time, content of dust, water vapour and aerosols in the atmosphere. In addition, mounting of solar energy systems in urban areas requires the determination of solar radiation, because in urban areas there is a more significant attenuation of solar radiation due to atmospheric pollution. However, the development of some methods to estimate the solar radiation assumes the knowledge of some climatological parameters (the optical air mass, Rayleigh optical depth, Linke turbidity factor, etc.). Among all these parameters, one of the most important is represented by the atmospheric turbidity, due to the relationship existing between aerosols and attenuation of solar radiation reaching the Earth’s surface. In this context, this paper proposes a study of the Linke turbidity factor, for Braşov urban area, with the purpose of more accurate solar radiation estimation. In addition, this study recommends the use of some correction coefficients for the direct and diffuse radiations; these coefficients are empirically determined and they depend on the specific geographical and climatic conditions of the considered site.
Authors and Affiliations
Elena EFTIMIE
Keywords
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