Improving daylight performance of light wells in residential buildings: Nourishing compact sustainable urban form

Freewan, Ahmed A.; Gharaibeh, Anne A.; Jamhawi, Monther

doi:10.1016/j.scs.2014.04.001

Cited by 23 publications

(15 citation statements)

References 16 publications

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“…In [17,18], they demonstrated that Radiance is highly agreed with real result as long as the sky condition well identified. Radiance has been validated by different researchers in different cases, and obtained results have been found to be in good agreement with experimental measurements [19][20][21][22]. Algorithm in [1] was used to model the LCP in Radiance.…”

Section: Radiancementioning

confidence: 78%

Maximizing the Performance of Laser Cut Panel by Interaction of Ceiling Geometries and Different Aspect Ratio

Freewan

2014

Journal of Daylighting

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The interaction between different ceiling geometries with laser cut panels (LCPs) is investigated using real experiments and computer simulations to maximize the daylight performance of the LCP. In addition, LCP with different aspect ratios (width to depth ratio) is studied using simulation with clear sky conditions in hot climate region. Two main performance parameters are investigated: illuminance level and distribution uniformity in a large space located in a sub-tropical climate region like Jordan. It was found that curved and chamfered ceilings increased the daylight level in the rear part of the studied room by 20% compared to a horizontal flat ceiling and reduce it by 30% in front part that improve the quality of daylight by improving the uniformity. LCP with high aspect ratio of 5:6 performed well in climate with clear sky and high solar angles than LCP with ratio of 4:6.

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Section: Radiancementioning

confidence: 78%

Maximizing the Performance of Laser Cut Panel by Interaction of Ceiling Geometries and Different Aspect Ratio

Freewan

2014

Journal of Daylighting

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“…However, the use and efficiency of the light well in providing daylight depends on its architecture: the narrower and longer it is, the less the illuminance it provides. Freewan, Gharaibeh, and Jamhawi (2014) also showed that the design of the lightwell opening could be a factor in the daylighting performance of the light well. Providing occupants with a light well window shows not just a lack of understanding of cultural needs, but also does not consider sustainability which is a major element in architecture (Edgar andLahham 2008, Goell 2007).…”

Section: Living Space Salah and Light Well Windowmentioning

confidence: 95%

Women's Satisfaction of Daylight in Contemporary Jeddah's Flats

Shatwan

2017

ENQ

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For inhabitants of residential buildings in Saudi Arabia, daylight levels are generally considered to be sufficient (Dahlan and Mohamed 2010). While there are a number of studies that analyse the light conditions as a general parameter for dwellers in cities (Boubekri 2008, Edwards and Torcellini 2002, Gou, Lau, and Qian 2013, Kim and Kim 2010), there seems to be a lack of attention to the specific case of women. In their lifetime, women spend considerable time inside homes. Moreover, the window is an architectural element that embodies a complex combination of religious, cultural, and environmental questions in Saudi Arabia. This study examines women satisfaction with daylight level in their living space in middle class residential flats in Jeddah. Twenty three women between the ages 20-50 who live in contemporary flats in Jeddah were interviewed in semi-structure interviews. This research examines women’s real use of daylight in their homes, by questioning the general understanding that daylight is provided at a sufficient level. This paper provides an insight into women’s satisfaction with regards to the daylight provided in their daily life by demonstrating qualitative evidence. Results strongly indicates that women are not satisfied with daylight due to many reasons according to window location and glass type. This research seeks to make significant contribution to the gap in knowledge regarding women and daylight in Saudi culture that requires high level of privacy.

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“…The best performance of the light well throughout the day is achieved when the sun is high in the sky and more light is being penetrated to the bottom of the light well [8]. Moreover, any means that lead and derived the daylight or sunlight inside the light well help to increase the occupants' satisfaction [7].…”

Section: Reviewmentioning

confidence: 99%

Daylight distribution patterns in light wells in residential buildings in Penang, Malaysia

Fadzil¹,

Al-Absi²

2016

WIT Transactions on Ecology and the Environment

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This paper focuses on the daylight distribution pattern in the light well in high rise residential buildings in Penang, Malaysia. Light well is a vertical void through all of the floors of a building which is designed to distribute daylight to adjacent spaces. The size of the light well is determined by the UBBL or the Malaysian Uniform Building By Laws (1984) clause no 40. The suitability of the clause is questioned when the original 8 storey residential buildings in the 1980s have risen up to 40 storeys after the year 2000. Eight case study buildings of varied heights and well sizes were carried out and natural illumination data were taken at well centres at each floor to be compared to the illumination outside. The percentage daylight factor (%DF) data were then calculated. The distinct pattern of daylight distribution from each case study was determined. The pattern of daylight factor values derived were found to be similar -very high illumination values at the top 3 floors; ample light for the next 4 to 5 floors while below those categories the light distribution were found to be quite low requiring artificial lighting almost 24 hours. However, this depends also on the A/H (area/height) index ratios and on the design of well -whether all enclosed, with supplementary side openings or others. Computer simulations using Ecotect were carried out to compare the simulated daylighting pattern of the well to field work. The daylighting pattern was found to be similar with advantages to the simulated graphical outputs. Suggestions as to how light well designs can be improved especially in buildings under the bright Malaysian skies were concluded.

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Improving daylight performance of light wells in residential buildings: Nourishing compact sustainable urban form

Cited by 23 publications

References 16 publications

Maximizing the Performance of Laser Cut Panel by Interaction of Ceiling Geometries and Different Aspect Ratio

Maximizing the Performance of Laser Cut Panel by Interaction of Ceiling Geometries and Different Aspect Ratio

Women's Satisfaction of Daylight in Contemporary Jeddah's Flats

Daylight distribution patterns in light wells in residential buildings in Penang, Malaysia

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