A step towards the optimization of the indoor luminous environment by genetic algorithms

Mattoni, Benedetta; Gori, Paola; Bisegna, Fabio

doi:10.1177/1420326x15608229

Cited by 24 publications

(11 citation statements)

References 30 publications

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“…The calculations of the parameters characterizing the quality of luminous environment in interiors were made using the DIALux 4.13 software. It is a tool verified [32] and used in research on interior lighting [30,31,33,34]. The Statistica package [35] was applied to calculate the lighting power and to analyze the results.…”

Section: Methodsmentioning

confidence: 99%

Ceiling and Wall Illumination, Utilance, and Power in Interior Lighting

2020

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The common use of electric lighting in interiors has led to the need to search for user- and environmentally-friendly solutions. In this research, the impact of the luminaires and room parameters on the selected parameters of general lighting in interiors was assessed. To achieve the objective of this work, a computer simulation and statistical analysis of results were conducted. The illuminance uniformity on work plane, ceiling and wall relative illuminances, utilance, and normalized power density of lighting installations for 432 situations were analyzed in detail. The scenarios were varied in terms of room size, reflectance, lighting class, luminaire downward luminous intensity distribution, and layout. The lighting class was a factor having the highest impact on ceiling and wall illumination, utilance, and power. It was also shown that the impact of lighting class on ceiling illumination, utilance and power, was different in interiors of various sizes. The impact of reflectances and luminaire layouts on the analyzed parameters was significantly lower. The results also demonstrated that the use of different lighting classes gave the possibility of reducing the power of general lighting in interiors at a level of 30% on average. Based on the results, a classification of energy efficiency in general lighting in interiors was also proposed. Understanding the correlations between the lighting system used and the effects achieved is helpful in obtaining comfortable and efficient lighting solutions in interiors.

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Section: Methodsmentioning

confidence: 99%

Ceiling and Wall Illumination, Utilance, and Power in Interior Lighting

2020

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“…Achieving a comfortable visual environment calls for various requirements. However, in relation to the light shelves, we limited the requirements to three conditions, i.e., maintaining adequate indoor illumination, balancing indoor illumination, and solving the glare problem [ 32 , 33 , 34 , 35 , 36 ]. The details are as follows.…”

Section: Introductionmentioning

confidence: 99%

A Basic Study on the Performance Evaluation of a Movable Light Shelf with a Rolling Reflector That Can Change Reflectivity to Improve the Visual Environment

Lee

2020

IJERPH

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In recent years, the need for comfortable visual environments in indoor spaces has increased energy use in buildings. There have been diverse studies on using a light shelf to solve this problem. It is an effective system that allows external natural light deep into indoor spaces through reflection. However, prior studies have used light shelves with a fixed reflectivity, and there are few studies on improving the visual environment through light shelf control. Therefore, this study proposes a movable light shelf with a rolling reflector that can change the reflectivity. To achieve these objectives, we conducted a performance evaluation of the system’s ability to save energy and improve the visual environment. This study built a real scale testbed and conducted a performance evaluation by deriving values for lighting energy consumption, uniformity, and luminance contrast depending on the light shelf variables. We conclude that (1) the light shelf system achieved an energy savings of 13.6% and 5.7%, respectively, compared to a fixed type light shelf, whose reflectivity cannot be changed, and a traditional movable light shelf; (2) in terms of improving the visual environment, results suggest that the visual environment could be improved using a light shelf by deriving light shelf variables that disturb indoor uniformity; and (3) the results verified glare generation conditions by deriving luminance contrast caused by the variables of light shelf angle and its reflectivity.

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“…Daylight is an essential resource for building users and it has a psycho-physiological role, impacting health and wellbeing [1,2]. It is also an important resource in terms of energy and economic efficiency, since the availability of daylight allows to lower the use of artificial lighting, and consequently of energy [3].…”

Section: Introductionmentioning

confidence: 99%

Towards a More Sustainable City: The Role of the Daylight Factor in Evaluating the Energy Requirements of Buildings

Benedetta¹,

Fabio²,

Alessandro³

et al. 2018

IJSCER

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The Daylight factor is the reference parameter used in Energy Standard EN15193:2008 to assess daylight contribution in the energy performance of buildings. But its efficacy in putting in relation buildings energy performance, daylight availability and visual tasks is now a subject of discussion in literature. In fact, the daylight factor is a static indicator independent from building geometry and environmental parameters. From the energy point of view, it has still to be assessed if it can ensure when the switch of artificial light is needed, representing therefore the most disadvantageous outdoor illuminance conditions. The goal of this study is demonstrating if the daylight factor calculated in standard conditions (Overcast sky) is conservative respect to that calculated using the diffuse component of the horizontal illuminance under CIE (Commission Internationale de l'Éclairage) Clear sky. If so, Daylight factor (D) might be applied, possibly with suitable corrections, to estimate the energy requirements for lighting, keeping the results on the safe side. 

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A step towards the optimization of the indoor luminous environment by genetic algorithms

Cited by 24 publications

References 30 publications

Ceiling and Wall Illumination, Utilance, and Power in Interior Lighting

Ceiling and Wall Illumination, Utilance, and Power in Interior Lighting

A Basic Study on the Performance Evaluation of a Movable Light Shelf with a Rolling Reflector That Can Change Reflectivity to Improve the Visual Environment

Towards a More Sustainable City: The Role of the Daylight Factor in Evaluating the Energy Requirements of Buildings

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