View types and luminance effects on discomfort glare assessment from windows

Shin, Ju Young; Yun, Geun Young; Kim, Jeong Tai

doi:10.1016/j.enbuild.2011.10.036

Cited by 68 publications

(35 citation statements)

References 18 publications

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“…Wienold and Christoffersen [20] proposed 2 000, 4 000 and 6 000 nit as thresholds for 'acceptable', 'just uncomfortable' and 'intolerable glare' respectively. Similarly, Shin, Yun [100] proposes 3 200, 5 600 and 10 000 nit respectively for the same three categories. Even greater values were proposed in [101].…”

Section: Luminancementioning

confidence: 99%

A review of indices for assessing visual comfort with a view to their use in optimization processes to support building integrated design

Carlucci

Causone

Rosa

et al. 2015

Renewable and Sustainable Energy Reviews

334

156

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In the last decades, several studies aimed at assessing some specified aspects of visual comfort characterizing the relationship between the human needs and the light environment, such as an available amount of light, light uniformity, light quality in rendering colors, and predicting the risk of glare for space occupants. For each of them, a (still growing) number of indices and metrics have been proposed in literature and standards. In the present work, they are described, categorized according to common features, and finally discussed. As in the case of long-term thermal comfort indices, such visual comfort indices and their summation over a specified calculation period might be used for driving optimization processes to support a more conscious integrated design of buildings. To that purpose, the choice among the available visual comfort indices needs to be informed by an analysis of their features and implications. We present recommendations for use, and suggest areas where improvement is needed for their use in optimization processes to support buildings' design.

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Section: Luminancementioning

confidence: 99%

A review of indices for assessing visual comfort with a view to their use in optimization processes to support building integrated design

Carlucci

Causone

Rosa

et al. 2015

Renewable and Sustainable Energy Reviews

334

156

View full text Add to dashboard Cite

show abstract

“…This is the value given in the experiments of Shin et al 16 , where on average people perceive the glare from simulated windows as "acceptable", i.e. scored as 2.5 out of 4.5 on their discomfort glare scale.…”

Section: Sensitivity Analysismentioning

confidence: 99%

“…11,12 Investigation of psychological effects of virtual windows is still an ongoing process. Some user perception studies on view and light (quality) aspects of virtual windows have been reported by, e.g., Tuaycharoen and Tregenza 13 which focused on discomfort glare from screen projected images, IJsselsteijn et al 14 , who focused on depth perception cues from screen projected images; de Vries et al 15 , who focused on non-visual effects of "emulated windows" without an image; and Shin et al 16 , who focused on subjective discomfort glare evaluation from a backlit, transparent printed image.…”

Section: Introductionmentioning

confidence: 99%

Simulation of virtual natural lighting solutions with a simplified view

Mangkuto

Aries

Loenen

et al. 2013

Lighting Research & Technology

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Daylight is limited in time and space. In situations where daylight is insufficiently available, Virtual Natural Lighting Solutions (VNLS), which are systems that artificially provide lighting and view comparable to those of real windows and skylights, can be promising. VNLS can turn currently unused floor space into space with daylight qualities. The space-gaining potential of VNLS in buildings can be predicted using computational building performance simulation. This paper describes the approach of modelling VNLS with a simplified view, using the Radiance tool to evaluate the lighting performance in a reference office. The VNLS is modelled as arrays of small light sources resembling the sky, the horizon, and the ground. The simulation results show that VNLS with wide beam angles generally offer a better uniformity and a larger percentage of sufficiently lit workplane area, compared to those obtained with real windows under overcast sky conditions, while the discomfort glare remains comparable to that received from real windows.Mangkuto, R.A., Aries, M.B.C., van Loenen, E.J., Hensen, J.L.M. 2013. "Simulation of virtual natural lighting solutions with a simplified view", Lighting Research and Technology. In press.

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“…Hopkinson emphasizes that high correlation between the predictions and the actual discomfort experienced should not be expected since discomfort glare has several side effects. Pleasant view has, for instance, been found to be an important side effect which makes the observer extend his/hers tolerance for discomfort [6,14,15,21,22]. Several researchers have proposed improvements of the formula for DGI over the years in order to obtain better correspondence with experimentally derived data or better mathematical formulation [15,21,23,24].…”

Section: Daylight Glare Measuresmentioning

confidence: 99%

Verification of simple illuminance based measures for indication of discomfort glare from windows

Karlsen

Heiselberg

Bryn

et al. 2015

Building and Environment

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a b s t r a c tModern office buildings are often designed with highly glazed facades, with an intention of being sufficiently day lit. However, extensive daylight supply has its backside, as glare might be a considerable concern. From a building design perspective it is important to be able to make reasonable predictions of discomfort glare from windows already in the early design stage when decisions regarding the façade are taken. This study focus on verifying if simple illuminance based measures like vertical illuminance at eye level or horizontal illuminance at the desk are correlated with the perceived glare reported by 44 test subjects in a repeated measure design occupant survey and if the reported glare corresponds with the predictions from the simple Daylight Glare Probability (DGPs) model. Large individual variations were seen in the occupants' assessment of glare in the present study. Yet, the results confirm that there is a statistically significant correlation between both vertical eye illuminance and horizontal illuminance at the desk and the occupants' perception of glare in a perimeter zone office environment, which is promising evidence towards utilizing such simple measures for indication of discomfort glare in early building design. Further, the observed response indicate that the participants in the present study were more tolerant to low illuminance levels and more sensitive to high illuminance levels than the DGPs model would predict. More and larger studies are needed to confirm or enfeeble this latter finding.

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View types and luminance effects on discomfort glare assessment from windows

Cited by 68 publications

References 18 publications

A review of indices for assessing visual comfort with a view to their use in optimization processes to support building integrated design

A review of indices for assessing visual comfort with a view to their use in optimization processes to support building integrated design

Simulation of virtual natural lighting solutions with a simplified view

Verification of simple illuminance based measures for indication of discomfort glare from windows

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