Anidolic System Research Articles

Eğitim Kurumu Binalarında Akıllı Aydınlatma Kontrol Sistemleriyle Gün Işığını Yönlendiren Sistemlerin İncelenmesi

In this study, intelligent lighting control systems and daylight directing systems within the framework of methods that maximize daylight in educational institution buildings were examined. The effective use of innovative, advanced daylight and intelligent lighting systems that improve the use of daylight in its function in lighting has been explained. In this context, motods that maximize the effective use of daylight by using intelligent lighting control systems in sustainable educational institution buildings have been examined in parallel with innovative and entrepreneurial perspectives. In this way, this study is aimed to provide a better understanding of intelligent lighting systems and to be a source to help determine the basic concepts and design criteria related to the systems. Key Words: Anidolic System, Prismatic Panel, Laser Cutting Panel, Holographic Optics

A Combined Method for an Exhaustive Investigation of the Anidolic Ceiling Effect on Improving Indoor Office Daylight Quality: an Approach Based on HDR Photography and Subjective Evaluations

Lighting quality in office environments is a broad concept that must be taken into account in the design stage to deliver comfortable spaces to reduce workers' stress. Indeed, daylight should be sufficient to perform visual tasks while avoiding excessive brightness, high contrast, or intense sunlight reflections that can cause discomfort glare. This research aims to test the Anidolic Integrated Ceiling (AIC) performance in creating a visually comfortable space by reducing the probability of glare. A combined method was adopted for investigating the influence of the building orientation and the workers' view directions in the different moments of the day in the winter season. Data collection was performed in an experimental environment, i.e., a physical scale model of 1:4 under real sky conditions. Three variables were: (i) the viewer's positions (parallel and face to the window), (ii) the façade orientation, (iii) the time of the day (morning and afternoon). To investigate the correlation between the simulated environment and the subjective comfort, we collected the following data in parallel: illuminance level, Daylight Glare Probability Index (DGIP), Luminance Contrast Ratios (LCR) for assessing the daylighting environments, and people reactions to the lighting setting to evaluate the perceived discomfort glare. The findings indicate that the Anidolic system's performance differs according to the occupant's orientation and her\his visual direction. The performance of the north façade of the case study application in Biskra, Algeria, was the best one. Indeed, the AIC system allows a harmonious luminance distribution without creating discomfort glare. Glare assessment shows that glare is perceived imperceptible in the lateral view (less than 0.30) and varies between imperceptible and perceptible in the parallel view (LCR values between 1:1 and 1:29). The questionnaire results show that the subjects were more satisfied with the luminous atmosphere of the lateral view than the parallel view where people more likely perceived discomfort. The statistical analysis shows that participants' perceptions of contrast and sensitivity to glare have a strong relationship with DGIP and LCR (0.000) and no correlation with illuminance and LCR.

Assessment of daylight performance of Advanced Daylighting Strategies in Large University Classrooms; Case Study Classrooms at JUST

Daylight in buildings helps to reduce energy consumption, lower negative impacts on the environment, improve human performance and increase the productivity. The current research aimed at studying the effect of advanced daylight technologies, like; lightshelf, anidolic systems, translucent materials and lightshelf combined with external reflectors, on daylight performance and visual environment in university classrooms. The current research was conducted on a classroom located in the lecture halls complex at Jordan University of Science and Technology (JUST). These daylight technologies were assessed for indicators; illuminance level, uniformity and energy saving. The research used real time experiments and IES-VE, the advanced simulation tool, to study how different daylight technologies would improve daylight illuminance levels and uniformity distribution. The results insured that these technologies could provide a significant increase in the illuminance levels to match the standards in the area of low illuminance level, improve the uniformity distribution and lower rates of discomfort glare. Results also indicated that energy consumption reduced in the classrooms by an average of 40–50% of energy used for lighting. Lightshelf, anidolic systems and windows in rear parts to the glazed corridor performed better in term of increasing light level in the rear part by an average of more than 100%.

A Vision of Daylight Technologies for High-Rise Residential Building in Tropic

Sidelighting is still the primary lighting opening for most buildings in all part of the world. The technology allows only limited penetration of daylight that causes a high energy consumption for artificial lighting. Using a right daylight technology in high-rise residential building could saving more energy and have a good impact on productivity and occupant’s health. This paper discusses the daylighting technologies for high-rise residential buildings in tropical area with literature review method. Some factors such function of systems, location, ability to change and transparency/the view outside will be the factors that must consider in selecting daylight technologies for high-rise residential building in tropic. The diffuse light-guiding system is a practical daylight technologies for deep floor plan building in tropics. The studies shows that potential daylight technology is diffuse light-guiding system that composed from light shelf, fish sytem and anidolic system. The performance of light shelf influenced by direct sunlight. Its increasing iluminance near window area and causes uneven distribution of illumination in the room. Fish system shows better performance than ordinary blinds, however the result is from integration of fish system and external blinds at low internal illuminance. Application anidolic system in tropical area improving illuminance ratio by factor 3.3, reducing glare by 14%, under overcast sky could transfer daylight upto12.5 m and under intermediate sky up to 20 m. For future work, anidolic system expected to respond sky conditions and direct sunlight for improvement in tropical area.

Assessing the energy saving potential of anidolic system in the tropics

Employing the edge-ray principle, the anidolic system (AS) has been proven as a promising daylighting solution for various climates. However, studies on the thermal performance of an AS are still rare. Because of the dominant contribution of the space-cooling load to building energy consumption at the operational stage in hot climates, knowledge of the impact of AS application on the space-cooling load is important. This study assessed the energy-saving potential of AS in the tropics by measuring the daylight level and distribution, as well as the solar heat gain, based on Radiance and EnergyPlus simulations using weather files of two locations in the tropics—Yogyakarta and Singapore. Monitoring data of a full-scale, unoccupied test building was acquired to validate the Radiance simulations and EnergyPlus models. A comparison between the energy-saving potential for lighting and cooling of AS and conventional aperture models showed that the application of AS in the tropics benefits the daylighting performance (DF ≥ 3% and horizontal distribution 51–70%), but still produces higher solar heat gains (44–437% higher than those of clerestory only). Narrow anidolic collectors with medium angular spread (45°–52°) and maximum clerestory height equipped with internal shelves can be applied to produce lower solar heat gain or indoor air temperature (2%) with sufficient daylight levels (≥ 2%) and an increased in horizontal illuminance distribution (> 57%).

Using Tubular Daylighting Systems to Improve Illuminance Level in Double Loaded Corridors in Educational Buildings

Double loaded corridors in educational buildings generally experience a low daylight level, as they do not have enough direct contact with the outdoor environment. The task light level in those corridors is lower than that in reading or office spaces. Double loaded corridors normally depend on artificial light. On the other hand, double loaded corridors need to be lit all the day during the occupation period as one can not specify when different users could use it. This research explores the possibility of using tubular light systems in addition to some architectural solutions to provide double loaded corridors with the required daylight. The research used anidolic, light pipe and ceiling cavity systems in addition to high windows from side offices to improve daylighting in double loaded corridors. The experimental study, which has taken place at JUST, showed that anidolic systems could provide double loaded corridors with sufficient lighting levels. On the other hand, radiance simulations showed that anidolic and some other solution systems can provide corridors with sufficient daylight in lower floors, while light pipes can provide corridors with sufficient daylight in upper floors.

On-site performance of electrochromic glazings coupled to an anidolic daylighting system

This work takes benefit from two advanced building technologies through the integration of an anidolic daylighting system and an electro-chromic glazing in a building facade for achieving an optimal control of the daylight flux entering in an office room. Computer simulations of different systems configurations, based on ray-tracing techniques, were used to identify the optimal anidolic system design. Once installed in an experimental building the visual and thermal performance of the anidolic system coupled to an electrochromic glazing was assessed by way of on-site monitoring. These performances were compared to those offered by a conventional double glazing unit installed in an identical neighbouring room. An evaluation of users comfort was achieved by way of a survey involving 30 different subjects. Their visual performance during specific tasks performed on a VDT screen and/or on a sheet of paper was used to compare the lighting conditions. The main results of this detailed experimental study, showing the capability of such a combined daylighting system to control the daylight flux entering a working space, are presented in this paper.

Anidolic daylighting systems

Non-imaging optics, well known for its application to solar concentrators, was used to set up novel daylighting systems that aim at an efficient collection and redistribution of the diffuse component of daylight. These devices, called anidolic systems (an: without, eidolon: image), were designed, installed and monitored on experimental test modules under clear and overcast sky conditions. Three different anidolic systems with different specific objectives were considered (anidolic ceiling, integrated anidolic system, anidolic solar blinds). Installed on 6.55-m deep rooms, the first two showed a significant improvement of daylight factors monitored in overcast conditions in comparison to a reference facade (conventional double glazing): a substantial improvement of the daylighting autonomy can be expected as a consequence. Higher work plan illuminances were observed for the third system under clear sky conditions, demonstrating sunlighting control capabilities that improve visual comfort and overall performance. The present article gives a description of these anidolic systems, as well as an overview of their luminous performance, assessed experimentally within the framework of IEA Task 21.