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Empirical Modelling for Solar Ultraviolet Irradiance and Illuminance by Means of Solar Zenith Angles in Lashio, Myanmar

http://hdl.handle.net/20.500.12678/0000005141
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1c248c71-638a-4c78-9f58-fb6502a99310
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Empirical Empirical Modelling for Solar Ultraviolet Irradiance.pdf (344 Kb)
Publication type
Journal article
Upload type
Publication
Title
Title Empirical Modelling for Solar Ultraviolet Irradiance and Illuminance by Means of Solar Zenith Angles in Lashio, Myanmar
Language en
Publication date 2015-06-02
Authors
Kyaw Thiha
Swe Swe Thant
Description
In this paper, empirical models are developed with regression equations to predict the solar ultraviolet radiation (Iuv) based on measured sun position values for Lashio, in Northern Shan state, Myanmar. These measurements are taken daily in an equinox. The value of the mean bias error (MBE), mean square error (RMSE) and mean percentage error root (MPE) were determined for the equation.The values of the correlation coefficient (r) and coefficient of determination (R2) were also determined for each equation. The equation with the highest values of r, R2 and at least values of RMSE, MBE and MPE is given as Iuv = 22.49 e-0.0152 θz – 6.321 named as a natural exponent model where θz is solar zenith angle. The results obtained show a remarkable agreement between the measured and the predicted values using our proposed models. This paper also examines the relationship between solar ultraviolet irradiance and illuminance received on the ground surface for Lashio. The relationships between solar ultraviolet irradiance and illuminance were found to be a linear equation which was sufficient, i.e. no significant improvement was obtained using a quadratic equation.
Keywords
Regression coefficient, zenith angle, site specific models, Lashio
Journal articles
2
Journal of the Myanmar Academy of Arts and Science
261-271
XIII
403
190
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