Illuminance Level in the Urban Fabric and in the Room

Iversen, Anne; Nielsen, Toke Rammer; Svendsen, Svend

doi:10.1177/1420326x11409460

Cited by 14 publications

(10 citation statements)

References 11 publications

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“…The obstructions of urban surroundings suppress the direct solar component during some or all hours of the day. 20 The shading effect from nearby buildings can be significant and reflected components can be the main sources of interior lighting 2,21,22 if they are not shaded. 15 This should be especially taken into account with dense construction as the presence of obstructions has repercussions on the availability of daylight and causes increased energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Climate-based daylighting analysis for the effects of location, orientation and obstruction

Munoz

Esquivias

Moreno

et al. 2013

Lighting Research & Technology

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During the first stages of building design, issues such as local climate, surrounding buildings and orientation are determining factors. The impact of these boundary conditions on daylight illuminances in an open-plan office space is studied in terms of daylight factor, daylight autonomy and useful daylight illuminances. Climate conditions in the location determine the characteristics of the daylight source, such as the ratio between diffuse lighting and global lighting. However, surrounding buildings and elements which may block daylight in the space hold more weight than the orientation of glazed faç ades, but are not always taken into consideration in daylighting studies.

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Section: Introductionmentioning

confidence: 99%

Climate-based daylighting analysis for the effects of location, orientation and obstruction

Munoz

Esquivias

Moreno

et al. 2013

Lighting Research & Technology

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“…Vertical daylight factor (VDF) has been explored as a criterion for the evaluation of natural lighting potential of buildings by comparing the VDF calculation method to other simulation techniques [31]. A study of an urban canyon [32], in which the relationship between the exterior illuminance levels on the facade surface and the interior illuminance levels on the working plane was examined via daylight factor (DF) and VDF [33] demonstrated that VDF would decrease with smaller street widths and higher opposing buildings. Furthermore, it is evident that increased facade reflectance of the opposing building would result in slightly higher VDF levels and could result in more rays bouncing off from that building and more of the light penetrating deeper into the room in question.…”

Section: Introductionmentioning

confidence: 99%

“…Parts of the method have been used in previous studies. Specifically, the method of linking VDF on the facade to DF in the room has been employed before by Iversen et al for the investigation of urban canyons [33], while the urban geometric model of nine buildings, with the central one being analyzed, has been used in a study about solar accessibility by Lobaccaro et al [28].…”

mentioning

confidence: 99%

Daylight Provision Requirements According to EN 17037 as a Restriction for Sustainable Urban Planning of Residential Developments

Šprah

Košir

2019

Sustainability

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The attempt at a more sustainable land use by increasing urban density may have a negative effect on the daylighting of residential buildings. In densely built areas, obstructions generated by the surrounding buildings can substantially reduce the available amount of daylight, causing poorly daylit spaces and a less healthy indoor environment with higher electricity consumption as a consequence of artificial lighting. European standard EN 17037, Daylight in Buildings, was established in 2018 to ensure appropriately daylit spaces. In this paper, a three-step methodology was developed to investigate the relationship between certain urban planning parameters and the daylighting of a typical room defined by specific (Slovenian) legislative restrictions about its geometry and minimum required window to floor area ratio, in order to establish the maximum densities of residential developments still fulfilling the minimum requirements for daylight provision defined by EN 17037. The results show that a relatively low urban density is required to fulfil the stipulations for minimum daylight provision for the deepest permissible room according to the Slovenian legislation. The impact of the development floor area ratio on the daylighting potential of buildings was identified as significant, followed by the site coverage, development layout, and building typology. Furthermore, the developed methodological approach clearly demonstrates a substantial potential for application in urban planning, with indoor daylight environmental conditions being linked to the planning of residential developments in the earliest stages of the project.

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“…Architects should have a particular consideration of the environment, especially energy use in buildings in design process [2,3]. More than 50% of the electricity energy is consumed in commercial buildings.…”

Section: Introductionmentioning

confidence: 99%

Investigating Daylight Quality Using Self-Shading Strategy in Energy Commission Building in Malaysia

Nikpour

Kandar

Mosavi

2012

Indoor and Built Environment

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There are a lot of office buildings without strategies for daylight utilization. Different strategies are suggested for better use of daylight. Self-shading strategy has been suggested to eliminate direct solar radiation to minimise energy use for cooling in offices but, the amount of daylight penetrating into the building can be reduced. In this research, the effectiveness of selfshading strategy on daylight is investigated through experimental method. Daylight parameters are measured in two individual office rooms in Energy Commission Building as a model of self-shading buildings. The objective is to investigate daylight quality in individual office room based on different criteria such as work plane illuminance, relative daylight ratio, surface luminance have been compared with recommended values.Finding of this research demonstrates that by employing self-shading strategy, the amount of daylight that enters the space could reduce but by applying other strategies like light shelves and venetian blinds, with self-shading strategy, acceptable performance in terms of daylight quality can be achieved. These strategies can be employed for future design of office buildings to reduce energy consumption for lighting as well as to comply with the goal of sustainable architecture.

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Illuminance Level in the Urban Fabric and in the Room

Cited by 14 publications

References 11 publications

Climate-based daylighting analysis for the effects of location, orientation and obstruction

Climate-based daylighting analysis for the effects of location, orientation and obstruction

Daylight Provision Requirements According to EN 17037 as a Restriction for Sustainable Urban Planning of Residential Developments

Investigating Daylight Quality Using Self-Shading Strategy in Energy Commission Building in Malaysia

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