Ocena večspektralnih simulacijskih orodij za vrednotenje nevizualnega svetlobnega okolja

Potočnik, Jaka (author), Košir, Mitja (author)

Svetlobo, predvsem dnevno svetlobo smo z napredki v znanosti preteklih desetletij prepoznali kot usklajevalec vsakodnevnega biološkega ritma – cirkadianega ritma ljudi s 24-urnim solarnim ritmom. Vrsta fotoreceptorja, zadolžena za nevizualno zaznavo, je bolj občutljiva za modri del svetlobe kakor sistem vidne zaznave in zato za oceno učinkov svetlobe na nevizualni sistem zahteva sposobnost vrednotenja okolja tudi z vidika spektralne sestave svetlobe. Namen te študije je bil na podlagi opravljenega eksperimenta ocene notranjega okolja pomanjšane pisarne, postavljene na strehi Fakultete za gradbeništvo in geodezijo Univerze v Ljubljani, preveriti, ali so obstoječa orodja večspektralnega vrednotenja notranjega okolja dovolj točna za vrednotenje nevizualnega svetlobnega okolja. Simulacije ovrednotimo z vidika točnosti in hitrosti pri jasnem nebu in severni orientaciji analiziranega prostora. Točnost simulacij ovrednotimo na podlagi korena povprečnega kvadrata napake (RMSE) relativne spektralne porazdelitve svetlobe (RSPD) in relativne napake v relativni melanopski učinkovitosti (RMU). Analiza pokaže nizke RMSE orodij ALFA in Lark, ko obravnavamo RSPD dnevne svetlobe, merjene na horizontalni ravnini zunaj. Kadar točnost vrednotimo z vidika navideznega uporabnika prostora, ALFA vestno simulira svetlobno okolje z največjo RMSE = 0,08 in največjo napako v RMU = 2,8 %. Lark se izkaže za manj natančnega z največjo RMSE = 0,18 in največjo napako v RMU = 16,2 %. Dodatno se izkaže, da je orodje ALFA časovno mnogo učinkovitejše z več kot 20-krat krajšimi simulacijskimi časi v primerjavi z Larkom.

• Language: Slovenian
• Keywords: dnevna svetloba, nevizualni učinki svetlobe, spektralne simulacije, pisarna
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2022
• Number of pages: Str. 111-125
• Numbering: Letn. 71
• PID: 20.500.12556/RUL-137058
• UDC: 628.9.021:72.054
• ISSN on article: 0017-2774
• COBISS.SI-ID: 106424835
• Publication date in RUL: 31.05.2022

Record is a part of a journal

• Title: Gradbeni vestnik. glasilo Zveze društev gradbenih inženirjev in tehnikov Slovenije
• Shortened title: Gradb. vestn.
• Publisher: Zveza društev gradbenih inženirjev in tehnikov Slovenije
• ISSN: 0017-2774
• COBISS.SI-ID: 859140

Secondary language

• Language: English
• Title: Assessment of multispectral simulation tools for the evaluation of the circadian luminous environment

Abstract

Light, especially daylight, has been recognized by advances in science over the past decades as the main coordinator of the daily biological rhythm of people with a 24-hour solar rhythm. The photoreceptor responsible for the non-visual perception is more sensitive to the blue component of light than the visual perception system. Therefore, it is necessary to evaluate the indoor environment in terms of the spectral composition of light to assess the effects of light on the non-visual system. The purpose of this study was to verify whether the existing tools for multispectral evaluation of the indoor environment are accurate enough to evaluate the non-visual luminous environment. The reliability of the studied tools was tested under clear sky conditions on a north oriented scale model of an office the luminous environment of which was determined experimentally. Experimental results were compared to the simulations evaluated in terms of accuracy and speed. The accuracy of the simulations was evaluated based on the root mean square error (RMSE) of the relative spectral distribution of light (RSPD) and the relative error of the relative melanopic efficiency (RME). The analysis shows that low RMSE of ALFA and Lark tools were achieved when considering RSPD measured outside on the horizontal plane. When evaluating accuracy from the perspective of a hypothetical office user, ALFA adequately simulated the lighting environment with a maximum RMSE = 0.08 and a maximum error in RME = 2.8 %. Lark proves to be less accurate with a maximum RMSE = 0.18 and a maximum error in RME = 16.2 %. Additionally, the ALFA tool proves to be much more time-efficient with more than 20 times shorter simulation runs compared to Lark.

• Keywords: daylight, non-visual effects of light, spectral simulations, office

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0158
• Name: Gradbene konstrukcije in gradbena fizika