Correlations for Estimation of Solar Radiation on Horizontal Surfaces
Publication: Journal of Energy Engineering
Volume 134, Issue 4
Abstract
In this study, variation of the solar radiation over horizontal surfaces for clear-sky atmospheres was predicted and compared with measurements carried out in Erzurum, Turkey (latitude: 39.55, longitude: 41.16, and altitude: ). Hottel’s clear-sky model was used in calculations of solar radiation on horizontal surfaces for clear-sky atmospheres. The results show that the model calculations are reasonably consistent with the measured data. It is recommended that Hottel’s clear-sky model can be used for solar radiation calculations in Erzurum. Also, correlation equations giving monthly averages of clear-sky and global solar radiation on horizontal surfaces have been developed. In order to indicate the performance of the correlation equations, the relative percentage error, correlation coefficient, mean percentage error, mean bias error, and root-mean-square-error methods were used.
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Acknowledgments
The writer thanks the Turkish State Meteorological Service for providing Erzurum meteorological data and the Atatürk University Research Fund for providing support for the solarimeter and its equipment.
References
Abdul Aziz, G. M. (1990). “Estimation of hourly clear-sky solar radiation for P. D. R. Yemen.” Sol. Wind Technol., 7(2/3), 255–260.
Akinoglu, B. G., and Ecevit, A. (1990). “Construction of a quadratic model using modified Angstrom coefficients to estimate global solar radiation.” Sol. Energy, 45, 85–92.
Angström, A. (1924). “Solar and terrestrial radiation.” Q. J. R. Meteorol. Soc., 50, 121–125.
Duffie, J. A., and Beckman, W. A. (1991). Solar engineering of thermal processes, Wiley, New York.
Ertekin, C., and Yaldiz, O. (2000). “Comparison of some existing models for estimating global solar radiation for Antalya (Turkey).” Energy Convers. Manage., 41, 311–330.
Hottel, H. C. (1976). “A simple model for estimating the transmittance of direct solar radiation through clear atmosphere.” Sol. Energy, 18, 129–134.
Howell, J. R., Bannerot, R. B., and Vliet, G. C. (1982). Solar-thermal energy systems analysis and design, McGraw-Hill, New York.
Kaygusuz, K. (1999). “The comparison of measured and calculated solar radiations in Trabzon, Turkey.” Energy Sources, 21, 347–353.
Klein, S. A. (1977). “Calculation of monthly average insolation on titled surfaces.” Sol. Energy, 19, 325–329.
Liu, B. Y. H., and Jordan, R. C. (1960). “The interrelationship and characteristic distribution of direct, diffuse and total solar radiation.” Sol. Energy, 4(3), 1–19.
Ma, C. C. Y., and Iqbal, M. (1984). “Statistical comparison of models for estimating solar radiation on inclined surfaces.” Sol. Energy, 31, 313–317.
Tasdemiroglu, E. (1988). “Solar energy utilization: Technical and economic aspects.” Middle East Technical University, Ankara, Turkey.
Tiris, M., Tiris, C., and Ture, I. E. (1996). “Correlations of monthly average daily global, diffuse, and beam radiations with hours of bright sunshine in Gebze, Turkey.” Energy Convers. Manage., 37(9), 1417–1421.
Togrul, I. T., Togrul, H., and Evin, D. (2000). “Estimation of global solar radiation under clear sky radiation in Turkey.” Renewable Energy, 21, 271–287.
Ulgen, K., and Hepbasli, A. (2003). “Comparison of the diffuse fraction of daily and monthly global radiation for Izmir, Turkey.” Energy Sources, 25, 637–649.
Information & Authors
Information
Published In
Journal of Energy Engineering
Volume 134 • Issue 4 • December 2008
Pages: 130 - 134
Copyright
© 2008 ASCE.
History
Received: Apr 16, 2007
Accepted: Aug 27, 2008
Published online: Dec 1, 2008
Published in print: Dec 2008
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