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Energies
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Energy Consumption and Visual Comfort Optimization for Lighting Systems
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Energy Consumption and Visual Comfort Optimization for Lighting Systems

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "G: Energy and Buildings".

Deadline for manuscript submissions: closed (10 August 2022) | Viewed by 12016

Special Issue Editor

Dr. Tullio De Rubeis

E-Mail Website
Guest Editor
Department of Industrial and Information Engineering and Economics (DIIIE), University of L’Aquila, Piazzale Pontieri 1, Monteluco di Roio, I 67100 L’Aquila, Italy
Interests: building physics; energy efficiency; lighting systems; dynamic simulations; lighting control systems; heat transfer; renewable energy
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In recent years, the need to reduce energy consumption together with the maximization of visual comfort has led to considerable advances in lighting systems performance. However, the energy consumption of lighting systems still accounts for around 20% of overall electricity consumption. Therefore, further efforts are needed to improve the energy performance of lighting systems, ensuring the highest visual comfort sensation.

This Special Issue on "Sustainable Buildings and Energy Performance" will collect scientific articles dealing with innovative research for lighting systems, taking into account different levels of knowledge. This Special Issue welcomes high-quality papers on the following topics:

  • Daylight harvesting;
  • Discomfort glare;
  • Glazing system;
  • Lighting control systems;
  • Lighting experimental campaigns;
  • Lighting simulations;
  • Smart solutions;
  • Visual comfort.

Dr. Tullio De Rubeis
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Case study
  • Daylight
  • Energy performance
  • Energy efficiency
  • Experimental campaign
  • Lighting system
  • Lighting simulation
  • Visual comfort

Published Papers (3 papers)

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Research

23 pages, 4025 KiB  
Article
Effect of Color Temperature and Illuminance on Psychology, Physiology, and Productivity: An Experimental Study
by Ruijun Chen, Meng-Chun Tsai and Yaw-Shyan Tsay
Energies 2022, 15(12), 4477; https://doi.org/10.3390/en15124477 - 20 Jun 2022
Cited by 14 | Viewed by 6098
Abstract
In this study, we investigated the impact of the lighting environment on psychological perception, physiology, and productivity and then designed lighting control strategies based on the experimental results. The research was conducted in a smart lighting laboratory, and 67 subjects were tested in [...] Read more.
In this study, we investigated the impact of the lighting environment on psychological perception, physiology, and productivity and then designed lighting control strategies based on the experimental results. The research was conducted in a smart lighting laboratory, and 67 subjects were tested in different illuminances and correlated color temperatures (CCTs). During the experiment, the physiological data of subjects were continuously recorded, while the psychology and productivity results were evaluated by questionnaires and working tests, respectively. The experimental results found that both illuminance and CCT could significantly influence the feeling of comfort and relaxation of the subjects. Warm CCT and higher illuminance (3000 K–590 lux) made subjects feel more comfortable. Productivity reached its maximum value with illuminance above 500 lux and equivalent melanopic lux (EML) higher than 150. The brain-wave and heart-rate changes did not have a close relationship with either illuminance or CCT, but the heart rate slightly increased in the adjustable lighting mode. Regardless of the initial value setting, the subjects preferred intermediate CCT (4200 K) and bright illumination (500 lux) after self-adjustment. Finally, we proposed three comprehensive lighting control strategies based on psychology, productivity, circadian rhythm, and energy-saving. Full article
(This article belongs to the Special Issue Energy Consumption and Visual Comfort Optimization for Lighting Systems)
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26 pages, 17854 KiB  
Article
Efficient Shading Device as an Important Part of Daylightophil Architecture; a Designerly Framework of High-Performance Architecture for an Office Building in Tehran
by Hassan Bazazzadeh, Barbara Świt-Jankowska, Nasim Fazeli, Adam Nadolny, Behnaz Safar ali najar, Seyedeh sara Hashemi safaei and Mohammadjavad Mahdavinejad
Energies 2021, 14(24), 8272; https://doi.org/10.3390/en14248272 - 8 Dec 2021
Cited by 6 | Viewed by 2961
Abstract
(1) Background: considering multiple, and somehow conflicting, design objectives can potentially make achieving a high-performance design a complex task to perform. For instance, shading devices can dramatically affect the building performance in various ways, such as energy consumption and daylight. This paper introduces [...] Read more.
(1) Background: considering multiple, and somehow conflicting, design objectives can potentially make achieving a high-performance design a complex task to perform. For instance, shading devices can dramatically affect the building performance in various ways, such as energy consumption and daylight. This paper introduces a novel procedure for designing shading devices as an integral part of daylightophil architecture for office buildings by considering daylight and energy performance as objectives to be optimal. (2) Methods: to address the topic, a three-step research method was used. Firstly, three different window shades (fixed and dynamic) were modeled, one of which was inspired by traditional Iranian structures, as the main options for evaluation. Secondly, each option was evaluated for energy performance and daylight-related variables in critical days throughout the year in terms of climatic conditions and daylight situations (equinoxes and solstices including 20 March, 21 June, 22 September, and 21 December). Finally, to achieve a reliable result, apart from the results of the comparison of three options, all possible options for fixed and dynamic shades were analyzed through a multi-objective optimization to compare fixed and dynamic options and to find the optimal condition for dynamic options at different times of the day. (3) Results: through different stages of analysis, the findings suggest that, firstly, dynamic shading devices are more efficient than fixed shading devices in terms of energy efficiency, occupants’ visual comfort, and efficient use of daylight (roughly 10%). Moreover, through analyzing dynamic shading devices in different seasons and different times of the year, the optimal form of this shading device was determined. The results indicate that considering proper shading devices can have a significant improvement on achieving high-performance architecture in office buildings. This implies good potential for daylightophil architecture, but would require further studies to be confirmed as a principle for designing office buildings. Full article
(This article belongs to the Special Issue Energy Consumption and Visual Comfort Optimization for Lighting Systems)
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23 pages, 9118 KiB  
Article
Dynamic Autonomous Identification and Intelligent Lighting of Moving Objects with Discomfort Glare Limitation
by Sebastian Słomiński and Magdalena Sobaszek
Energies 2021, 14(21), 7243; https://doi.org/10.3390/en14217243 - 3 Nov 2021
Cited by 1 | Viewed by 1852
Abstract
The importance of reducing discomfort glare during the dynamic development of high luminance LEDs is growing fast. Smart control systems also offer great opportunities to reduce electricity consumption for lighting purposes. Currently, dynamic “intelligent” lighting systems are a rapidly developing field. These systems, [...] Read more.
The importance of reducing discomfort glare during the dynamic development of high luminance LEDs is growing fast. Smart control systems also offer great opportunities to reduce electricity consumption for lighting purposes. Currently, dynamic “intelligent” lighting systems are a rapidly developing field. These systems, consisting of cameras and lighting units, such as moving heads or multimedia projectors, are powerful tools that provide a lot of opportunities. The aim of this research is to demonstrate the possibilities of using the projection light in dynamic lighting systems that enable the reduction of discomfort glare and the light pollution phenomenon. The proposed system allows darkening or reducing the luminance of some sensitive zones, such as the eyes or the head, in real-time. This paper explores the development of the markerless object tracking system. The precise identification of the position and geometry of objects and the human figure is used for dynamic lighting and mapping with any graphic content. Time measurements for downloading the depth maps, as well as for identifying the human body’s position and pose, have been performed. The analyses of the image transformation times have been carried out in relation to the resolution of the images displayed by the projector. The total computation time related to object detection and image display translates directly into the precision of fitting the projection image to a moving object and has been shown. Full article
(This article belongs to the Special Issue Energy Consumption and Visual Comfort Optimization for Lighting Systems)
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