An Evaluation of Useful Daylight Illuminance in an Office Room with a Light Shelf and Translucent Ceiling at 51° N

The present study investigates the issue of computer-aided daylight evaluation in an office room with a light shelf and dropped translucent ceiling. In this type of room, daylight is admitted from two sources: (<i>i</i>) a standard window in the wall and (<i>ii</i>) via a lig...

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Autor principal:	Marcin Brzezicki
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	daylight simulation light shelf translucent ceiling radiance Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/fc717d2e2a764f2ba483e80a3ac967ac
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spelling	oai:doaj.org-article:fc717d2e2a764f2ba483e80a3ac967ac2021-11-25T16:59:24ZAn Evaluation of Useful Daylight Illuminance in an Office Room with a Light Shelf and Translucent Ceiling at 51° N10.3390/buildings111104942075-5309https://doaj.org/article/fc717d2e2a764f2ba483e80a3ac967ac2021-10-01T00:00:00Zhttps://www.mdpi.com/2075-5309/11/11/494https://doaj.org/toc/2075-5309The present study investigates the issue of computer-aided daylight evaluation in an office room with a light shelf and dropped translucent ceiling. In this type of room, daylight is admitted from two sources: (<i>i</i>) a standard window in the wall and (<i>ii</i>) via a light shelf and clerestory window, which illuminate the plenum located above the working space. The light from the plenum is transmitted through the translucent ceiling into the office room. The present study is based on data obtained through a computer-aided daylight simulation by DeLuminæ (DL-Light, ver. 11.0.9, and DL-Instant, ver. 6.1.4) software using the Radiance engine and real weather data for Wroclaw, Poland, at 51st lat. N. An office room of 12 × 6 m with different shading and daylight distribution scenarios was simulated (Variants 1–5). Next, the useful daylight illuminance (UDI (%)) for the range of 300–3000 lx and daylight glare probability (DGP) were calculated. To further optimize the daylighting scenarios, an adaptive shading system was simulated, which was activated when the illuminance value dropped below 300 lx. In the final variant, Variant 6, mean UDI<sub>300–3000</sub> values were recorded to be above 80% for 95% of the area of the work plane. This allows the conclusion that a light shelf and translucent ceiling guide daylight deep into the room, improving uniformity and reducing glare when the standard window is covered by an adaptive shading system.Marcin BrzezickiMDPI AGarticledaylight simulationlight shelftranslucent ceilingradianceBuilding constructionTH1-9745ENBuildings, Vol 11, Iss 494, p 494 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	daylight simulation light shelf translucent ceiling radiance Building construction TH1-9745
spellingShingle	daylight simulation light shelf translucent ceiling radiance Building construction TH1-9745 Marcin Brzezicki An Evaluation of Useful Daylight Illuminance in an Office Room with a Light Shelf and Translucent Ceiling at 51° N
description	The present study investigates the issue of computer-aided daylight evaluation in an office room with a light shelf and dropped translucent ceiling. In this type of room, daylight is admitted from two sources: (<i>i</i>) a standard window in the wall and (<i>ii</i>) via a light shelf and clerestory window, which illuminate the plenum located above the working space. The light from the plenum is transmitted through the translucent ceiling into the office room. The present study is based on data obtained through a computer-aided daylight simulation by DeLuminæ (DL-Light, ver. 11.0.9, and DL-Instant, ver. 6.1.4) software using the Radiance engine and real weather data for Wroclaw, Poland, at 51st lat. N. An office room of 12 × 6 m with different shading and daylight distribution scenarios was simulated (Variants 1–5). Next, the useful daylight illuminance (UDI (%)) for the range of 300–3000 lx and daylight glare probability (DGP) were calculated. To further optimize the daylighting scenarios, an adaptive shading system was simulated, which was activated when the illuminance value dropped below 300 lx. In the final variant, Variant 6, mean UDI<sub>300–3000</sub> values were recorded to be above 80% for 95% of the area of the work plane. This allows the conclusion that a light shelf and translucent ceiling guide daylight deep into the room, improving uniformity and reducing glare when the standard window is covered by an adaptive shading system.
format	article
author	Marcin Brzezicki
author_facet	Marcin Brzezicki
author_sort	Marcin Brzezicki
title	An Evaluation of Useful Daylight Illuminance in an Office Room with a Light Shelf and Translucent Ceiling at 51° N
title_short	An Evaluation of Useful Daylight Illuminance in an Office Room with a Light Shelf and Translucent Ceiling at 51° N
title_full	An Evaluation of Useful Daylight Illuminance in an Office Room with a Light Shelf and Translucent Ceiling at 51° N
title_fullStr	An Evaluation of Useful Daylight Illuminance in an Office Room with a Light Shelf and Translucent Ceiling at 51° N
title_full_unstemmed	An Evaluation of Useful Daylight Illuminance in an Office Room with a Light Shelf and Translucent Ceiling at 51° N
title_sort	evaluation of useful daylight illuminance in an office room with a light shelf and translucent ceiling at 51° n
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/fc717d2e2a764f2ba483e80a3ac967ac
work_keys_str_mv	AT marcinbrzezicki anevaluationofusefuldaylightilluminanceinanofficeroomwithalightshelfandtranslucentceilingat51n AT marcinbrzezicki evaluationofusefuldaylightilluminanceinanofficeroomwithalightshelfandtranslucentceilingat51n
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An Evaluation of Useful Daylight Illuminance in an Office Room with a Light Shelf and Translucent Ceiling at 51° N

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