Summary
Rigorous trigonometrical equations for calculating directly the sky components at any point due to a C.I.E. Standard Overcast Sky for both vertical and horizontal rectangular unglazed windows are derived and presented. The equations, when suitably combined, can also be used for any sloping window. The general method adopted can be used to derive similar equations for a sky with any intensity distribution, provided that intensity is a function of altitude alone and independent of azimuth orvice-versa.
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References
C.I.E. Proc., 1955,2.
Hopkinson, R. G., Longmore, J. and Murray Graham, A.Simplifled Daylight Tables, 1958, H.M.S.O., London.
Moon, P. and Spencer, D. E...Illuminating Engineering, 1942,37, 707–26.
Rivero, R. ..Illuminacion Natural, 1958, Translated from Spanish by R. G. Hopkinson, B.R.S., L.C. No. 860, 1959.
Waldram, P. J...A Measuring Diagram for Daylight Illumination, B.T. Batsford, Ltd., London, 1950.
Walsh, J. W. T...Architects Journal, 1959,129, 440–42.
Yamauti, Z. .. “Geometrical Calculation of Illumination,”Electrot. Lab. Tokyo Researches, 1924,148.
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Paper published with the permission of the Director, Central Building Research Institute, Roorkee.
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Seshadri, T.N. Equations of sky components with a “C.I.E. standard overcast sky”. Proc. Indian Acad. Sci. 51, 233–242 (1960). https://doi.org/10.1007/BF03045745
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DOI: https://doi.org/10.1007/BF03045745