Light & Engineering 32 (4) 2024

Volume 32
Date of publication 08/15/2024
Pages 22–31

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Efficient Calculation of Annual Daylighting Performance Metrics Using the Klems Grid L&E, Vol.32, No.4, 2024

Articles authors:

Alexey G. Voloboy, Sergey V. Ershov, Eugene Yu. Denisov, Vladimir A. Galaktionov

Alexey G. Voloboy, Doctor of Physical and Mathematical Sciences. In 1988, he graduated from the Faculty of Mechanics and Mathematics of Moscow State University named after M.V. Lomonosov. He defended his Ph. D. thesis at the Keldysh Institute of Applied Mathematics RAS in 2005, doctoral dissertation was defended in 2012. At present, he is the leading researcher at the Department of Computer Graphics and Computational Optics at the KIAM RAS. Area of his scientific interests: computer graphics, computational optics, ray tracing, lighting simulation. He is the author of more than 200 articles

Sergey V. Ershov, Ph. D. of Phys. – Math. Sciences. He graduated from the Faculty of Physics of Moscow State University named after M.V. Lomonosov in 1988. He defended his Ph. D. thesis at the Keldysh Institute of Applied Mathematics RAS in 1991. Currently, he is the senior researcher in Department of Computer Graphics and Computational Optics at the KIAM RAS. Area of his scientific interests: computer graphics, computational optics, numerical methods of math. physics, Monte Carlo methods, ray tracing, diffraction problems. He is the author of more than 100 articles on this subject

Eugene Yu. Denisov, He graduated from the Faculty of Computational Mathematics and Cybernetics of Moscow State University named after M.V. Lomonosov in 1995. Currently, he is the researcher in Department of Computer Graphics and Computational Optics at the KIAM RAS. Area of his scientific interests: computer graphics, ray tracing, lighting simulation, automation of program testing. He is the author of 24 articles on this topic

Vladimir A. Galaktionov, Doctor of Physical and Mathematical Sciences, Professor. He graduated from the Faculty of Management and Applied Mathematics of the Moscow Institute of Physics and Technology in 1975. He defended his Ph. D. thesis at the Keldysh Institute of Applied Mathematics RAS in 1982 and doctoral dissertation in 2006. At present, he is the chief researcher of the Department of Computer Graphics and Computational Optics at the KIAM RAS. Areas of his scientific interest: computer graphics, computational optics, computational linguistics, scientific visualization. He is the author of more than 250 articles

Abstract:

Natural lighting (daylight) plays a decisive role in energy saving and building maintenance. An important aspect is the comfort of the premises. Modern building design requires computer analysis of indoor illumination in accordance with the green building certification program, the main indicators of which are spatial daylight autonomy (sDA) and annual sunlight exposure (ASE). Calculation of these metrics requires thousands of simulations of global illumination for various time moments throughout the year. Well-known methods of lighting simulation are not effective here. We propose an original approach that uses precomputed data and its fast interpolation on a Klems grid to iteratively simulate the lighting distribution. The method was compared with classical stochastic ray tracing and existing solutions based on the radiosity method. The efficiency of calculations has increased significantly (and sometimes orders of magnitude) while maintaining high accuracy of the results. The ability to calculate metrics in tens of minutes on a regular computer, provided by our method, allows an architectural design to be continuously checked for compliance with the green buildings program.

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Keywords

DOI: https://doi.org/10.33383/2024-016

Article in RUS:
Svetotekhnika # 3, 2024, pp. 12–18

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