Quantifying energy savings in daylight responsive systems: The role of dimming electronic ballasts

Doulos, Lambros T.; Tsangrassoulis, Aris; Topalis, Frangiskos V.

doi:10.1016/j.enbuild.2007.01.019

Cited by 132 publications

(57 citation statements)

References 18 publications

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“…In [34], they demonstrated that evaluating energy costs with different software can determine results that diverge up to 15%. On the one hand differences in results depend on the definition of indoor daylight availability, but on the other hand they depend on the control systems' modeling that neglect important factors as the specific characteristics of photosensors, luminaires, or ballasts [20][21][22][23].…”

Section: Discussionmentioning

confidence: 99%

“…Above the already mentioned studies about software validations, researchers analyzed different aspects connected to simulations: calculation affecting factors as sky model or weather data file [16][17][18], the correct modeling of complex materials or fenestration systems [6,14], the uncertainty of users' behavior [19], and the daylightlinked control modeling [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Daylight Availability for Energy Savings

Bellia

Fragliasso

Pedace

2015

Journal of Daylighting

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Dynamic daylight simulations are very useful instruments in daylighting design process. They allow an in depth analysis of indoor daylight availability levels and define if they are adequate to perform a particular visual task. Their results can be used to design shading devices or lighting control systems and compare different technical solutions. The use of these simulations is likely to spread in the common design practice since some regulations and green building rating systems suggest their use. This paper presents dynamic daylight simulation results related to an open-plan office, performed with Autodesk 3ds Max Design ® , which is a calculation software validated by recent researches. It is not used in academic context but it is very widespread between technicians for photorenderings production purposes. The goal of this research is to demonstrate the functionality of this software also in dynamic daylight simulations field and propose an analysis' methodology to use it.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of Daylight Availability for Energy Savings

Bellia

Fragliasso

Pedace

2015

Journal of Daylighting

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“…Una de las maneras más eficientes de reducir el consumo de luz eléctrica es a través del uso de la luz natural llamada luz del día (Bodart et al, 2008). El empleo de la iluminación natural vinculado con controles de iluminación artificial ha revelado, en estudios de campo, ahorros energéticos de entre un 30 y un 60 % (Li y Lam, 2001;Li et al, 2006;Kurian et al, 2008;Doulos et al, 2008).…”

Section: Introductionunclassified

Amabilidad visual: sistemas de sombreado

2016

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Este é um artigo de acesso aberto, licenciado por Creative Commons Atribuição 4.0 Internacional (CC BY 4.0), sendo permitidas reprodução, adaptação e distribuição desde que o autor e a fonte originais sejam creditados.1 CONICET Mendoza -Centro Científico Tecnológico. Av. Ruiz Leal, 5500, Mendoza, Argentina. RESUMEN -La iluminación afecta el comportamiento de las personas y su impresión de los espacios, sin embargo muy poco se ha estudiado respecto de la amabilidad visual de un espacio protegido por sistemas de sombreado (Ruck et al., 2000). El presente trabajo analiza tres aspectos vinculados a este concepto -color, visión exterior y apariencia-en espacios interiores con aventanamientos protegidos por filtros de control solar y cortinas textiles interiores. Su justificación está planteada ante la hipótesis de que la correcta implementación de sistemas de sombreado (filtros de control solar, venecianas, louvers, cortinas) debe incorporar, al actual análisis de usabilidad visual (visibilidad y confort visual), el estudio de la amabilidad visual. Los resultados obtenidos revelan la necesidad de implementar estrategias de sombreado, desde la perspectiva de la amabilidad visual, respetando los principios bioclimáticos de orientación y adecuación a las condiciones climáticas regionales, a través de estudios dinámicos del factor de iluminación.Palabras clave: iluminación natural, sistemas de sombreado, amabilidad visual, apariencia, temperatura de color correlacionada, visión al exterior.ABSTRACT -Lighting affects people's behavior and their impression of the environment, yet very little has been studied regarding the visual amenity of indoor spaces protected by shading systems (Ruck et al., 2000). The present study analyzes three aspects related to this concept -color, outside view, appearance -in indoor spaces with windows shaded with solar films and curtains. Its purpose is justified by the hypothesis that the correct implementation of shading systems (solar control films, venetian blinds, louvers, curtains) should add the study of visual amenity to the current usability analysis (visibility and visual comfort). From the standpoint of visual amenity, the results show the need to implement shading strategies according to bioclimatic principles of façade orientation and adaptation to regional climate conditions, through daylight dynamic studies.

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“…Lighting control systems can reduce energy use from electricity by 20% or even up to 60% in certain conditions [6][7][8]. A side benefit to proper daylighting are the reduced costs for cooling, as the amount of heat generated by the lighting system is also reduced [9].…”

Section: Introductionmentioning

confidence: 99%

A Review of Light Shelf Designs for Daylit Environments

et al. 2017

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Light shelves have been discussed in numerous studies as suitable solutions for controlling daylight in side-lit spaces. It is a system that can be easily modified, offering a range of design solutions. It can be easily mounted on the exterior and/or the interior of a vertical opening, it can come in various shapes from static flat forms to curved reflective surfaces, or it can even be actively controlled. A light shelf can offer shading and at the same time can redirect a significant part of the incoming light flux towards the ceiling improving daylight uniformity. Due to the aforesaid functions, light shelves are among the most popular system design solutions when it comes to daylight exploitation. The purpose of this paper is twofold. Firstly, to present the main research findings in relation to light shelves as daylighting systems and secondly to analyze the results, trying to establish a common basis for some efficient and practical design rules. The present paper is a review of the research realized in the last three decades concerning these systems together with their associated implications in a building's daylight performance as well as in its energy balance in a few cases. In addition, the critical review of their design principles is included, which makes the presented information useful for design teams trying to select the optimal available system for any specific project.

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Quantifying energy savings in daylight responsive systems: The role of dimming electronic ballasts

Cited by 132 publications

References 18 publications

Evaluation of Daylight Availability for Energy Savings

Evaluation of Daylight Availability for Energy Savings

Amabilidad visual: sistemas de sombreado

A Review of Light Shelf Designs for Daylit Environments

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