ANISOTROPIC CORRECTION MODEL FOR THE DIFFUSE SOLAR IRRADIANCE MEASURED BY THE MELO-ESCOBEDO SHADOWRING METHOD
DOI:
https://doi.org/10.59627/cbens.2007.1298Keywords:
Shadowring, Diffuse solar irradiance, Correction factors, AnisotropyAbstract
the present paper deals with anisotropic corrections factors proposed as a function of the clearness index in order to correct the diffuse solar irradiance measured with the Melo-Escobedo Shadowring Measuring Method (ME). The global irradiance was measured by an Eppley-PSP pyra- nometer; direct normal irradiance by an Eppley-NIP pyrheliometer fitted to a ST-3 sun tracking de- vice and the diffuse irradiance by an Eppley-PSP pyranometer fitted to a ME shadowring. The vali- dations were performed by the MBE and RMSE statistical indicators.
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References
Battles, F. J., olmo, F. J., Alados-Arboledas, L. 1995. On shadowband correction methods for dif- fuse irradiance measurements. Solar Energy, v.54, n.2, pp.105-114.
Drummond, A. J. 1956. On the measurements of sky radiation. Archiv. fur Meteorologie. Geo- physik Bioklimatologie, v.7, pp.413-436.
Iqbal, M. An introduction to solar radiation. Nova Iorque, Academic Press, 1983. 390p.
Kasten, F., Dehne, K., Brettschneider, W. 1983. Improvement of measurement of diffuse solar ra- diation. Solar radiation data, série F, n.2, pp.221-225, D. Redel, Dordrecht.
Lebaron, B. A., Michalsky, J. J., Perez, R. 1990. A simple procedure for correcting shadowband data for all sky conditions. Solar Energy, v.44, n.5, pp.249-256.
Liu, B. Y. H. E Jordan, R. C. 1960. The interrelationship and characteristic distribution of direct, diffuse and total solar radiation. Solar Energy, v.3, n.4, pp.1-19.
Melo, J. M. D., Escobedo, J. F. Medida da radiação solar difusa. In: ENERGÍAS LÍMPIAS EN PROGRESO, VII CONGRESSO IBÉRICO DE ENERGIA SOLAR, Vigo, Espanha. Anais INTERNATIONAL SOLAR ENERGY SOCIETY, v. 1, 1994.
Oliveira, A. P., Escobedo, J. F., Machado, A. J. 2002. A new shadow-ring device for measuring dif- fuse solar radiation at surface. Journal of Atmospheric and Oceanic Technology, Boston, v. 19, pp. 698-708.
Pollard, D. G. E Langevine, L. P. 1988. An anisotropic correction for diffuse irradiance measure- ments in Guyana. In: Proceeding of the 1988 Annual Meeting, M. J. Coleman (Ed.), pp. 238- 243, ASES Cambridge.
Robinson, H., Stoch, L. 1964. Sky radiation and measurements and corrections. Journal of Applied Meteorology, v.3, pp.179-181.
Stanhill, G. 1985. Observations of shadering correction factors for diffuse sky radiation measure- ments at the Dead Sea.Quarterly Journal of the Royal Meteorological Society, v.111, pp.1125- 30.
Stone, R. J. 1993. Improved statistical procedure for the evaluation of solar radiation estimation models. Solar Energy, v.51, n.4, pp.289-291.
