Modelling ‘non-visual’ effects of daylighting in a residential environment

Andersen, Marilyne; Gochenour, Sharon J.; Lockley, Steven W.

doi:10.1016/j.buildenv.2013.08.018

Cited by 53 publications

(47 citation statements)

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“…To the contrary, higher levels of light exposure stimulate physical activity and longer sleep duration [11]. The significance of light as an essential element of healthy living has been emphasized by the recent discovery of a specialized photoreceptor in the eye responsible for synchronizing our internal circadian pacemaker [12], thus highlighting the importance of basing housing design upon the amount of daylight available for maintaining synchronization of the human circadian system [13]. Furthermore, numerous studies have shown the significance of utilizing daylight in buildings for saving energy [14,15], identifying daylighting as a crucial element in architectural design and a useful strategy for energy-efficient building designs.…”

Section: Introductionmentioning

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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Section: Introductionmentioning

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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“…In addition, the recent progress in research and development of smart lighting systems based on an human centric approach [14] as well as Internet of Things (IOT) has further confirmed their energy-saving potential in lighting [15,16]. Nonetheless, it has been revealed in studies that the daylight, as an ubiquitous cost-economical light source, cannot be fully substituted by the current technology of artificial light, not only due to its unique spectral power distribution [17] but also because of its non-visual effects on occupants' physiology, behaviour and circadian rhythms [18][19][20], which indirectly influence human's health [21,22] and performance [23]. Within developed economies, such as in Europe and North America, people spend 90% of their time on activities and environments relying on artificial lighting [24,25].…”

Section: Introductionmentioning

confidence: 99%

Design and validation of a compact embedded photometric device for real-time daylighting computing in office buildings

Kämpf

Scartezzini

2019

Building and Environment

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Studies have shown that the exposure to daylight can have substantial visual/non-visual benefits for building occupants. To optimise daylighting provision while maintaining a comfortable visual environment, daylighting control systems have been investigated by architectural design and academic research for a number of years. However, real-time regulation of daylighting in buildings requires transient daylighting simulation with high accuracy and, daylighting simulation, as performed to date, is significantly impacted by the employed sky luminance distribution models which only crudely reproduce the real sky characteristics due to oversimplification and limited luminance sampling inputs. In this paper, an embedded photometric device is proposed to combine high dynamic range (HDR) imaging based highresolution sky luminance monitoring with quasi real-time on-board daylighting computing, composed of a low-cost image sensor and a field programmable gate array (FPGA) microprocessor. A deliberate calibration procedure of the whole imaging system, regarding its spectral response (spectral correction error f'1 = 8.89%), vignetting effect and signal response, was formulated and validated experimentally. The device was made to measure a wide luminance range (150 dB) including that of the direct solar disk, sky vault, and landscape simultaneously. Finally, experiments during predominant clear and overcast sky conditions were conducted respectively to assess its performance in daylighting simulation, both qualitatively and quantitatively. The experimental results demonstrated its quality in solar tracking as well as its capability to reduce daylighting simulation error to 1 7 ∼ 1 3 of that of a common practice using the conventional Perez all-weather sky model for workplane illuminance calculation in office buildings.

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“…The photoreceptor is known as intrinsically photosensitive retinal ganglion cells (ipRGC) [4]. The circadian response on light conditions is complex and depends on exposure timing, duration, intensity and spectral power distribution (SPD) of the light source [5]. Circadian rhythms exist, with different characteristics, in animals as well as in plants.…”

Section: Introductionmentioning

confidence: 99%