Rafael B. de Oliveira
Faculdade de Tecnologia Senai Porto Alegre, LEEQEE, Porto Alegre, Brazil
Fausto B. Líbano
Faculdade de Tecnologia Senai Porto Alegre, LEEQEE, Porto Alegre, Brazil
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http://dx.doi.org/10.3384/ecp11057883Published in: World Renewable Energy Congress - Sweden; 8-13 May; 2011; Linköping; Sweden
Linköping Electronic Conference Proceedings 57:18, p. 883-890
Published: 2011-11-03
ISBN: 978-91-7393-070-3
ISSN: 1650-3686 (print), 1650-3740 (online)
This paper presents an algorithm developed in C language that aims to help roadway illumination designers to create an illumination system that meets the standard’s limits with minimum electrical energy consuming. As a secondary function; the program allows the user to get approximate luminance and illuminance values for a specific system without field measuring. The algorithm was created to fit into a hardware prototype based in ARM7TDMI architecture; with no need for complicated and heavy software running in PC machines. The main system variables regarded by the optimization function are pole height (H) and pole spacing (S); putting the luminaries as far from each other as possible; in order to use the minimum power per km. Through calculation of the system’s luminance; the algorithm starts with S and H in their maximum values; decreasing every loop; subtracting the results from the standard limit (NBR5101-Brazil; CIE 118; EN 13201 or other standard loaded into the program) seeking for zero. Once the zero is found; the H and S values are put on a LCD or USB port; as algorithm results.
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