Abstract
This paper deals with the comparative study on daylight availability on horizontal working plane of a simulated room under identified CIE (International Commission on Illumination) Standard skies prevailing in Roorkee, India for the three seasonal conditions, viz. equinox, summer, and winter solstices. Daylight coefficient method (DC) and finite element method (FEM) have been applied to develop computer programs in MATLAB environment for this simulation. Here daylight availability is predicted for a room with single-sided window of opening areas 20% of floor area and sill height 1 m from floor with eight cardinal window orientations. Analysis revealed that during summer the amount of daylight availability is maximum as the sun shines directly on the Northern Hemisphere during summer. Polar axis of earth is tilted 23.5° to the orbital plane. Differential and changing illumination pattern on earth for different seasons is due to combinations of rotation, revolution, and tilt of polar axis.
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Acknowledgements
The author wishes to acknowledge the support received from Dr. R. Kittler and Dr. Danny H. W. Li since they sent their publications which helped to complete this research. She also likes to thank Indian Society of Lighting Engineers [ISLE] and Mr. P. K. Bandyopadhyay, past President, ISLE for providing a copy of the report [12] published by Central Building Research Institute [CBRI] containing Indian Measured Daylight Database.
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Gupta, A., Mukherjee, S. (2020). Comparative Study on Simulation of Daylighting Under CIE Standard Skies for Different Seasons. In: Basu, T., Goswami, S., Sanyal, N. (eds) Advances in Control, Signal Processing and Energy Systems. Lecture Notes in Electrical Engineering, vol 591. Springer, Singapore. https://doi.org/10.1007/978-981-32-9346-5_15
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DOI: https://doi.org/10.1007/978-981-32-9346-5_15
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