Journal articles: 'Daylight linked control systems'

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Bellia, Laura, Francesca Fragliasso, and Gennaro Riccio. "Daylight fluctuations effect on the functioning of different daylight-linked control systems." Building and Environment 135 (May 2018): 162–93. http://dx.doi.org/10.1016/j.buildenv.2018.03.008.

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Escuyer, S., and M. Fontoynont. "Lighting controls: a field study of office workers’ reactions." Lighting Research & Technology 33, no. 2 (June 2001): 77–94. http://dx.doi.org/10.1177/136578280103300202.

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This paper reports a qualitative study of the acceptability of lighting control systems by 41 French office workers, in three sites with dimmable lighting, respectively with manual, semi-manual, and automatic control. The analysis of the results aimed to determine the characteristics of an ideal lighting control system. It appeared that the occupants found automatic continuous daylight-linked systems discreet, but they needed to be able to override them. The complexity of the remote control has led occupants to under-exploit it. Many occupants chose lower artificial light levels when daylight was bright, in order to benefit more from daylight. Automatic dimming with manual choice of illuminance level, optional task lighting, and user friendly control, may be the key elements of an ideal lighting control system.

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Bonomolo, M., M. Beccali, V. Lo Brano, and G. Zizzo. "A set of indices to assess the real performance of daylight-linked control systems." Energy and Buildings 149 (August 2017): 235–45. http://dx.doi.org/10.1016/j.enbuild.2017.05.065.

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Bellia, Laura, and Francesca Fragliasso. "Evaluating performance of daylight-linked building controls during preliminary design." Automation in Construction 93 (September 2018): 293–314. http://dx.doi.org/10.1016/j.autcon.2018.05.026.

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Bellia, Laura, and Francesca Fragliasso. "Automated daylight-linked control systems performance with illuminance sensors for side-lit offices in the Mediterranean area." Automation in Construction 100 (April 2019): 145–62. http://dx.doi.org/10.1016/j.autcon.2018.12.027.

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Atif, Morad R., and Anca D. Galasiu. "Energy performance of daylight-linked automatic lighting control systems in large atrium spaces: report on two field-monitored case studies." Energy and Buildings 35, no. 5 (June 2003): 441–61. http://dx.doi.org/10.1016/s0378-7788(02)00142-1.

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Li, Danny H. W., Emmanuel I. Aghimien, and Khalid Alshaibani. "An Analysis of Real-Time Measured Solar Radiation and Daylight and Its Energy Implications for Semi-Transparent Building-Integrated Photovoltaic Façades." Buildings 13, no. 2 (January 31, 2023): 386. http://dx.doi.org/10.3390/buildings13020386.

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For analyzing cooling loads, day-lighting, and building-integrated photovoltaic (BIPV) systems, solar radiation and daylight illuminance data are required. However, these data are sparse. Furthermore, studies have shown that the energy potential of building-integrated photovoltaic (BIPV) systems for the entire building skin (BS) and unconventional orientations, such as east, west, and north need further exploration. Thus, this study presents findings from measured solar data and an energy analysis of semi-transparent BIPV. Firstly, solar radiation and daylight data measured from June 2019 to May 2020 in Hong Kong are presented. The analyzed solar-radiation data were used to determine the solar-energy potential of BIPV for BS and the four principal building orientations (i.e., N, E, S and W). With a simple analytical approach, the solar data’s building-energy implications for semi-transparent BIPV were assessed. The findings showed that the annual average horizontal global-, diffuse-, and direct-irradiance values were 291.8, 164.3, and 127.5 W/m2/day, respectively. Similarly, 120, 72, and 107 klux were obtained as the peak global, diffuse, and direct illuminance, respectively. Furthermore, the results show the potential of using BIPV on the entire BS in Hong Kong. It was also observed that a semi-transparent BIPV façade integrated with daylight-linked lighting controls could offer significant energy savings in electric lighting and cooling while also producing energy. In particular, BIPV façades with a large window-to-wall ratio (WWR) of 80% can provide an overall energy benefit of up to 7126 kWh.

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Cesari, Silvia, Paolo Valdiserri, Maddalena Coccagna, and Sante Mazzacane. "The Energy Saving Potential of Wide Windows in Hospital Patient Rooms, Optimizing the Type of Glazing and Lighting Control Strategy under Different Climatic Conditions." Energies 13, no. 8 (April 24, 2020): 2116. http://dx.doi.org/10.3390/en13082116.

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If not properly designed, the adoption of large windows can sometimes have a negative impact on building energy demand. For this reason, aggravated by the outdated building envelope of the healthcare building stock, large fenestration systems are usually avoided in hospitals, especially in old structures. However, with appropriate glazing specifications, the adoption of wider openings can result into significant energy savings, lower costs and strong positive effects on patients and staff well-being. The present study investigates how different window sizes and types of glazing affect heating, cooling and lighting energy demand in a hospital patient room. The objective is to evaluate the energy savings that may be obtained when installing larger windows and to identify the glazing properties allowing one to reach the maximum energy reductions. Simulations were carried out using nine diverse glazing systems, already available on the market, and their energy performance was evaluated in relation to two different window areas: a common size opening, characterized by a 25% Window-to-Wall Ratio (WWR), and a floor to ceiling window, with 77% WWR. The analysis was conducted taking into consideration four different orientations in four Italian cities, supposing two artificial lighting control strategies. The results highlighted how the adoption of wider windows with appropriate glazings and a daylight-linked dimming lighting control strategy may lower the primary energy demand up to 17%.

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Beccali, M., M. Bonomolo, G. Ciulla, and V. Lo Brano. "Assessment of indoor illuminance and study on best photosensors' position for design and commissioning of Daylight Linked Control systems. A new method based on artificial neural networks." Energy 154 (July 2018): 466–76. http://dx.doi.org/10.1016/j.energy.2018.04.106.

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Renno, Carlo, Alessandro Perone, Diana D’Agostino, and Francesco Minichiello. "Performance Evaluation of a Linear CPV/T System in Different Working Conditions." Energies 16, no. 5 (February 22, 2023): 2115. http://dx.doi.org/10.3390/en16052115.

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The performance of Concentrating Photovoltaic and Thermal (CPV/T) systems is also linked to climatic conditions. In this paper, the main purpose is to determine the energy and economic performance of a line-focus CPV/T system used for a residential user, considering three cities with different weather conditions: Amsterdam (The Netherlands), Marrakech (Morocco), and Salerno (Italy). A modular configuration of a CPV/T system, with a concentration factor equal to 90 and module of 60 Triple-Junction (TJ) cells, is considered. The electrical power is linked to the values of TJ cell temperature and concentrated radiation by an experimental model. Electric production is highly influenced by the TJ cell temperature values. Hence, Marrakech presents lower power generation in summer than Amsterdam, 126 W, and 134 W respectively; in winter season the trend is reversed. However, the electric production in Marrakech will be higher because presents a higher number of daylight hours than other cities considered. The CPV/T system electrical and thermal producibility is evaluated for each city and for typical winter and summer sunny days, together with the modules number able to obtain the investment profitability.

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Warren, Kathryn, Julie Milovanovic, and Kyoung Hee Kim. "Effect of a Microalgae Facade on Design Behaviors: A Pilot Study with Architecture Students." Buildings 13, no. 3 (February 25, 2023): 611. http://dx.doi.org/10.3390/buildings13030611.

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The influence of nature on occupant well-being and performance has been proved in office, hospital, and educational settings. There is evidence that plants and green colors affect creative and psychological responses. The microalgae facade in the study integrated spirulina, blue-green microalgae, which were cultivated using natural daylight and room air. While a good body of research explores nature’s impact on people, research on microalgae systems has not been linked to creative performance. This pilot study, therefore, focused on how the microalgae facade influences occupant mood and creativity. Forty architecture students were randomly assigned to the control and experimental rooms. The control group was surveyed in a room with a traditional window, whereas the experimental group was surveyed in a room with a biochromic window. Research design for the two conditions remained the same under IEQ-controlled environments except for the inclusion of the microalgae facade. Forty architecture students completed two creativity tasks—alternative use test (AUT) and remote association test (RAT)—and brainstorming for sustainable design in control and experimental settings. Our preliminary findings indicate that the microalgae facade did not affect divergent ideas and convergent thinking during tasks, but participants in the microalgae façade developed more design solutions that included greenery than students in the control space. This research is a preliminary investigation into the human impact of a microalgae façade and represents a new focus for scientific research. More work is needed to better grasp to what extent implementing a microalgae façade will impact human behavior in space.

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Thompson, James, Matthew Baldock, and Tori Lindsay. "Motorcycle crashes resulting in hospital admissions in South Australia: Crash characteristics and injury patterns." Journal of Road Safety 31, no. 1 (February 1, 2020): 10–19. http://dx.doi.org/10.33492/jrs-d-19-00245.

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Motorcycle riders have a high risk of serious injury if they crash. To assist with identification of countermeasures, the present study examined records from the Royal Adelaide Hospital (RAH) in South Australia for 763 motorcyclists (including scooter riders) admitted between January 2008 and November 2010 and between April 2014 and December 2016. Records were linked with police-reported crash data and results of forensic blood tests for alcohol and drugs. When compared with 1617 car drivers admitted to the RAH over the same periods, motorcyclists were younger, were more commonly male, more likely to hold a learner permit, less likely to hold a provisional licence, less likely to be over the legal alcohol limit and less likely to be at-fault in multiple vehicle crashes. Their crashes were more likely to be single vehicle crashes (specifically roll over, left road – out of control and hit object/animal/pedestrian on road crashes) and were more common on weekends, during the afternoon, on sloping roads, on curved roads, on roads with speed limits of 50 and 80 km/h, during daylight hours, in dry weather and on dry roads. They had a higher severity of injury than car drivers, spent longer in hospital, and were more likely to sustain injuries to multiple body regions. Linear regression showed that older age, higher blood alcohol concentration and higher speed limit increased injury severity for motorcyclists. Based on present findings, motorcycling safety can be improved through countermeasures related to Graduated Licensing Systems, infrastructure, motorcycle technology and protective clothing.

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Picot, B., S. Moersidik, C. Casellas, and J. Bontoux. "Using Diurnal Variations in a High Rate Algal Pond for Management Pattern." Water Science and Technology 28, no. 10 (November 1, 1993): 169–75. http://dx.doi.org/10.2166/wst.1993.0227.

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The high rate algal pond (HRAP) is an efficient low cost wastewater system. It is well adapted to small communities with high summer loads. Many studies have been carried out on HRAP in order to adapt them to the seasonal variations of climate but very few have been devoted to the diurnal behavior of the system which could be an important design parameter. The work for this investigation was carried out at the ‘Centre de Lagunage de Recherche Pluridisciplinaire‘ in Mèze, France, community located on the Mediterranean The results show that all variables, except COD, do have diurnal variations. During daylight, photosynthetic activity is at its peak between 13:00 GMT and 15:00 GMT with oxygen saturation rates of 350 %, high pH's (pH>9) and low total alkalinity. The highest removal rates of NH4-N and PO4-P are 94 % and 89 % respectively. During the night, photosynthesis stops and the dissolved oxygen concentrations drop to very low levels or even to zero. pH decreases (8.6) and total alkalinity increases as a consequence of the intense respiration of the algae and other organisms of the system.The various efficiencies decrease. Nutrient removal is linked to the variations of solar radiation and temperature which are considered as the main characteristics controlling algal activity. Algae contribute to the elimination of nutrients through two mechanisms: biological uptake and pH increase causing a volatilization of NH3 and a chemical precipitation of calcium phosphates. The decrease of the performances of a HRAP during the night is caused on the one hand by the interruption of photosynthesis combined with respiration, causing a decrease in pH and, on the other hand, to the continued inflow of sewage in the pond. The knowledge of the diurnal behavior of HRAP leads to a new concept of pond management. When HRAP pond effluent was withheld according to photosynthetic activity, this resulted in a more efficient removal of nutrients. Automatic systems tied to time or pH could control the release of effluent and easily implement such a management.

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Bellia, Laura, and Francesca Fragliasso. "New parameters to evaluate the capability of a daylight-linked control system in complementing daylight." Building and Environment 123 (October 2017): 223–42. http://dx.doi.org/10.1016/j.buildenv.2017.07.001.

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Shen, Hui, and Athanasios Tzempelikos. "Daylight-linked synchronized shading operation using simplified model-based control." Energy and Buildings 145 (June 2017): 200–212. http://dx.doi.org/10.1016/j.enbuild.2017.04.021.

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Erdem, Erkan. "Eğitim Kurumu Binalarında Akıllı Aydınlatma Kontrol Sistemleriyle Gün Işığını Yönlendiren Sistemlerin İncelenmesi." Journal of Social Research and Behavioral Sciences 8, no. 16 (June 20, 2022): 1–19. http://dx.doi.org/10.52096/jsrbs.8.16.1.

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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

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Odiyur Vathanam, Gnana Swathika, Karthikeyan Kalyanasundaram, Rajvikram Madurai Elavarasan, Shabir Hussain Khahro, Umashankar Subramaniam, Rishi Pugazhendhi, Mehana Ramesh, and Rishi Murugesan Gopalakrishnan. "A Review on Effective Use of Daylight Harvesting Using Intelligent Lighting Control Systems for Sustainable Office Buildings in India." Sustainability 13, no. 9 (April 29, 2021): 4973. http://dx.doi.org/10.3390/su13094973.

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Lighting is a fundamental requirement of our daily life. A lot of research and development is carried out in the field of daylight harvesting, which is the need of the hour. One of the most desirable attributes of daylight harvesting is that daylight is available universally and it is a very clean and cost-efficient form of energy. By using the various methods of daylight harvesting, it is possible to attain the global Sustainable Development Goals. Daylight harvesting in the most fundamental sense is the lighting strategy control of the artificial light in an interior space where daylight is also present so that the required illumination level is achieved. This way, a lot of energy can be saved. Recently, in addition to energy efficiency, other factors such as cost-efficiency, user requirements such as uniform illuminance, and different levels of illuminance at different points are being considered. To simulate the actual daylight contribution for an office building in urban Chennai, India before construction, ECO TECH software is used by providing the inputs such as building orientation, and reflectance’s values of the ceiling, wall, and floor to analyze the overall percentage of daylight penetration available versus the percentage prescribed in the Indian Green Building Council to obtain the credit points. Thus, the impact of architectural design on daylight harvesting and daylight predictive technology has experimented with office building in Chennai, India. This article will give an insight into the current trends in daylight harvesting technology and intends to provide a deeper understanding and spark a research interest in this widely potential field.

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Güvenç, Mahmut, Selma Selvi, and Orhan Özdemir. "Okul Binalarının Aydınlatılmasında Günışığını Taşıyan Sistemlerin İncelenmesi." International Journal of Social Sciences 6, no. 27 (December 25, 2022): 230–49. http://dx.doi.org/10.52096/usbd.6.27.17.

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This study aims to examine the performance levels of the methods that maximize the effective use of daylight by using intelligent lighting control systems in schools. As is known, in general, daylight is an indispensable element of the ecological cycle as a natural light source. The concept of daylight with people and structures within the framework of the study and the relationship of these formal functions, with an emphasis on the effective use of intelligent lighting control systems in schools and the use of light to enhance the performance of the methods by raising a clearer grasp and use in the field to add to the evolving system of methods and principles were elaborated. In this formal integrity, the benefits and requirements of these system functions have been emphasized by approaching the issue from the point of view of the system that carries daylight in schools with these intelligent lighting control systems. Key Words: School, Daylight, Lighting, Carrier Systems

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Zhang, Daoyuan, Xiaohua Xia, and Xianming Ye. "WITHDRAWN: Distributed illumination control of lighting systems with daylight." IFAC-PapersOnLine 50, no. 2 (December 2017): 237–38. http://dx.doi.org/10.1016/j.ifacol.2017.12.046.

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Erdem, Erkan. "Eğitim Kurumu Binalarında Akıllı Aydınlatma Kontrol Sistemleriyle Gün Işığını Taşıyan Sistemlerin İncelenmesi." International Journal of Social Sciences 6, no. 25 (June 19, 2022): 75–95. http://dx.doi.org/10.52096/usbd.6.25.5.

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In this study, intelligent lighting control systems and daylight-carrying systems within the framework of methods that maximize daylight in educational institution buildings were examined. The purpose of these functions, known as intelligent lighting control systems, is to ensure the construction of sustainable educational institution buildings in the process that continues from the construction stage of educational institution buildings to the conduct of daily educational work. The main issues of attention in the buildings of this educational institution are intelligent lighting, high technology, daylight saving as much as possible, insulation and energy efficiency. In this way, intelligent lighting systems aim to minimize the installation load and usage times of energy-consuming systems of educational institution buildings and maximize the use of daylight without compromising the comfort conditions required by active users of buildings. Key Words: Heliostatic System, Lighting Guide, Lighting Tube, Fiber Optic

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AKSOY TIRMIKÇI, Ceyda, and Cenk YAVUZ. "Energy Saving and Life Cycle Analysis of a Daylight-Linked Control System." Sakarya University Journal of Computer and Information Sciences 3, no. 3 (December 30, 2020): 183–87. http://dx.doi.org/10.35377/saucis.03.03.773517.

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Yang, In-Ho, and Eun-Ji Nam. "Economic analysis of the daylight-linked lighting control system in office buildings." Solar Energy 84, no. 8 (August 2010): 1513–25. http://dx.doi.org/10.1016/j.solener.2010.05.014.

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Güvenç, Mahmut, Selma Selvi, and Orhan Özdemir. "Okul Binalarının Aydınlatılmasında Günışığını Yönlendiren Sistemlerin İncelenmesi." Journal of Social Research and Behavioral Sciences 8, no. 17 (December 25, 2022): 345–62. http://dx.doi.org/10.52096/jsrbs.8.17.20.

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The main purpose of this study is to investigate the effects of effective use of sunlight on building forms by using existing developable techniques in parallel with the methods that can be renewed, resorting to control systems related to smart lighting in schools, and to examine the performance of the methods that maximize the competent use of the sun's rays in this regard in terms of system conditions that direct the sun's rays. Using daylight effectively by using intelligent lighting control systems in schools is a common area related to many strategies, especially energy conservation. The efficient use of daylight in schools ensures the efficient use of energy at the same time. The effective use of daylight in schools depends on the effective use of economical and natural lighting systems in parallel with the developing technology. This situation also appears as a mechanism that develops in direct proportion to the rate of progress of increasing technologies related to systems that direct sunlight. Key Words: School, Daylight, Lighting, Router Systems

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Futagami, Takuya, Toru Yano, Chingchun Huang, and Takaaki Enohara. "Experimental evaluation for daylight‐linked gradation lighting control using image‐based motion sensors." IEEJ Transactions on Electrical and Electronic Engineering 15, no. 5 (May 2020): 723–32. http://dx.doi.org/10.1002/tee.23108.

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Moeck, Martin, and Steven E. Selkowitz. "A computer-based daylight systems design tool." Automation in Construction 5, no. 3 (September 1996): 193–209. http://dx.doi.org/10.1016/0926-5805(96)00151-3.

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Kalyanam, Raghuram, and Sabine Hoffmann. "A Reinforcement Learning-Based Approach to Automate the Electrochromic Glass and to Enhance the Visual Comfort." Applied Sciences 11, no. 15 (July 28, 2021): 6949. http://dx.doi.org/10.3390/app11156949.

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Daylight is important for the well-being of humans. Therefore, many office buildings use large windows and glass facades to let more daylight into office spaces. However, this increases the chance of glare in office spaces, which results in visual discomfort. Shading systems in buildings can prevent glare but are not effectively adapted to changing sky conditions and sun position, thus losing valuable daylight. Moreover, many shading systems are also aesthetically unappealing. Electrochromic (EC) glass in this regard might be a better alternative, due to its light transmission properties that can be altered when a voltage is applied. EC glass facilitates zoning and also supports control of each zone separately. This allows the right amount of daylight at any time of the day. However, an effective control strategy is still required to efficiently control EC glass. Reinforcement learning (RL) is a promising control strategy that can learn from rewards and penalties and use this feedback to adapt to user inputs. We trained a Deep Q learning (DQN) agent on a set of weather data and visual comfort data, where the agent tries to adapt to the occupant’s feedback while observing the sun position and radiation at given intervals. The trained DQN agent can avoid bright daylight and glare scenarios in 97% of the cases and increases the amount of useful daylight up to 90%, thus significantly reducing the need for artificial lighting.

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Parise, Giuseppe, and Luigi Martirano. "Combined Electric Light and Daylight Systems Ecodesign." IEEE Transactions on Industry Applications 49, no. 3 (May 2013): 1062–70. http://dx.doi.org/10.1109/tia.2013.2253534.

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Seyedolhosseini, Atefesadat, Mehdi Modarressi, Nasser Masoumi, and Noushin Karimian. "Efficient photodetector placement for daylight-responsive smart indoor lighting control systems." Journal of Building Engineering 42 (October 2021): 103013. http://dx.doi.org/10.1016/j.jobe.2021.103013.

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Villalba, A., JM Monteoliva, R. Rodríguez, and A. Pattini. "A dynamic performance analysis of passive sunlight control strategies in a neonatal intensive care unit." Lighting Research & Technology 50, no. 2 (June 29, 2016): 191–204. http://dx.doi.org/10.1177/1477153516656225.

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Neonatal intensive care units are a special lighting design challenge. Although natural light is highly desirable, it should be carefully planned to maximise benefits and minimise the problems associated with uncontrolled sunlight. This paper discusses the performance of different passive sunlight control strategies in a neonatal intensive care unit at the Dr. Humberto Notti Children's Hospital in Mendoza, Argentina, analysing their annual daylight behaviour through dynamic daylight simulations. The aim of this work is to optimise the use of daylight in neonatal intensive care units, considering the special lighting conditions required. Results show that, in this case study, the adequate implementation of solar control systems and the appropriate layout of the space for different uses according to surrounding building design and the characteristics of the local luminous climate can increase the useful daylight illuminance by up to 13%, while avoiding the incidence of direct sunlight at all times.

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Nguyen Thi Khanh Phuong and Aleksey K. Solovyev. "Assessment of building daylight systems considering sunscreens under real conditions of the sky." Vestnik MGSU, no. 2 (February 2020): 180–200. http://dx.doi.org/10.22227/1997-0935.2020.2.180-200.

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Introduction. Lighting engineering is a complex scientific field which requires the generalization of knowledge in visual comfort evaluation, design and architectural solutions as well as in other areas including the humanities. Global ecological problems and the drive for Sustainable Development require achieving maximum energy efficiency from architectural designers. The tasks of designing daylight systems under real sky conditions cannot be solved without considering the problems of insolation and sunscreens. Russian and foreign standards cover long-put questions about the need to improve the daylight calculation method considering additional light reflected from adjacent surfaces under the clear and partially cloudy skies. The objective of the study is analysis and improvement of the daylight system calculation method considering sunscreens under intermediate sky conditions. Materials and methods. The methods of searching and selecting relevant literature in international abstract databases with well-developed tools for thematic search as well as analytical methods are described. Results. A method for calculating daylight system considering sunscreens under the intermediate sky conditions is suggested. The analysis of the obtained formulae confirmed the proposed theory: under the influence of direct sunlight, reflection from adjacent surfaces significantly increases the daylight level in a room. Conclusions. Assessment of daylight in a room under the intermediate sky conditions should take into account a reflection of the direct sunlight. Correcting the problem under conditions of the CIE overcast sky model in the calculation is associated with the availability of a light climate database. This approach makes it possible to formulate the criteria for a dynamic daylight assessment. Combination of an artificial lighting system with an automatic control mode guarantees the requirements of indoor illuminance and energy saving.

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Bag, Moutusi, Saswati Mazumdar, and Kalyan Kumar Ray. "A Cost-Effective Illuminance Sensor for DaylightHarvesting Lighting Control Systems." Light & Engineering, no. 04-2020 (August 2020): 103–10. http://dx.doi.org/10.33383/2019-012.

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A cost-effective two-wire industrial standard illuminance sensor (4–20) mA has been proposed. It can be used for daylight harvesting control of indoor illuminance and other applications. The basic sensor used is a cadmium sulphide (CdS) light dependent resistor, whose relative spectral characteristic almost corresponds to the human eye. The method of sensor calibration has been presented and static and dynamic performance characteristics of the sensor have been experimentally determined.

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Doulos, Lambros T., Aris Tsangrassoulis, Evangelos-Nikolaos Madias, Spyros Niavis, Antonios Kontadakis, Panagiotis A. Kontaxis, Vassiliki T. Kontargyri, et al. "Examining the Impact of Daylighting and the Corresponding Lighting Controls to the Users of Office Buildings." Energies 13, no. 15 (August 4, 2020): 4024. http://dx.doi.org/10.3390/en13154024.

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Daylight utilization significantly contributes to energy savings in office buildings. However, daylight integration requires careful design so as to include variations in daylight availability and maintain a balance between factors such as lighting quality and heat gain or loss. Designers with proper planning can not only improve the visual environment and create higher-quality spaces, but simultaneously minimize energy costs for buildings. The utilization of photosensors can exploit the benefits of daylighting by dimming the lighting system, so that no excessive luminous flux is produced, thus leading to energy savings as well as visual contentment. However, the human factor is crucial for the proper function of a lighting control system. Without its acceptance from the users, energy savings can be minimized or even negligible. The objective of this paper is to present a post-occupancy evaluation regarding occupant satisfaction and acceptance in relation to daylighting in offices equipped with automated daylight controls. In addition, the response of the users was compared with lighting measurements that were performed during the post-occupancy evaluation. Three case studies of office buildings with installed daylight-harvesting systems were examined. The age of the occupants was a crucial factor concerning their satisfaction in relation to the lighting levels. Aged users were more comfortable with lighting levels over 500lx, while young users were satisfied with 300lx. The impact of different control algorithms was outlined, with the integral reset algorithm performing poorly. The acceptance of the users for the closed loop systems maintained the expected energy savings of the daylight harvesting technique. Most of the occupants preferred to use daylight as a light source combined with artificial light but having the control to either override or switch it on and off at will. The results shown that a post-occupancy survey along with lighting measurements are significant for making an office environment a humancentric one.

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Yoon, Younju, Jin Woo Moon, and Sooyoung Kim. "Analysis of Prediction Accuracy for Photosensor Signals of Daylight Dimming Control Systems." Journal of The Korean Society of Living Environmental System 22, no. 2 (April 30, 2015): 254. http://dx.doi.org/10.21086/ksles.2015.04.22.2.254.

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Pandharipande, Ashish, and David Caicedo. "Daylight integrated illumination control of LED systems based on enhanced presence sensing." Energy and Buildings 43, no. 4 (April 2011): 944–50. http://dx.doi.org/10.1016/j.enbuild.2010.12.018.

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Kim, In-Tae, Yu-Sin Kim, Meeryoung Cho, Hyeonggon Nam, Anseop Choi, and Taeyon Hwang. "High-Performance Accuracy of Daylight-Responsive Dimming Systems with Illuminance by Distant Luminaires for Energy-Saving Buildings." Energies 12, no. 4 (February 22, 2019): 731. http://dx.doi.org/10.3390/en12040731.

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In a conventional daylight-responsive dimming system (DRDS), all the luminaires are turned off during the calibration process except for the luminaire under consideration in order to sense only the workplane illuminance of that luminaire. However, the workplane illuminance of the luminaire is influenced by other luminaires. Therefore, the final workplane illuminance of the actual operated system is higher than the target workplane illuminance, reducing the energy-saving efficiency of the DRDS. Herein, to improve the conventional DRDS, an advanced commissioning prediction method of daylight illuminance, and a dimming control algorithm considering the influences by distant luminaires are proposed. To evaluate the accuracy of the proposed prediction method of daylight illuminance, the daylight illuminance on the workplane and the photo sensor values of six points were measured in a full-scale mockup for 27 consecutive days from 22 June to 18 July 2018. As a result of root-mean-square error (RMSE) analysis of daylight illuminance and the photo sensor values, the RMSE (64.86) of P3 located in the middle of the room was the highest, and the RMSE value (17.60) of P5 located near the window was the lowest. In addition, the power consumption of the luminaires, and the target illuminance accuracy of the proposed DRDS were measured and analyzed for 32 consecutive days from 19 July to 19 August 2018 in a full-scale mockup. The average target illuminance accuracy was 96.9% (SD 2.2%), the average lighting energy-savings ratio was 78.4%, and the daylight illuminance prediction accuracy was 95.5% (SD 3.4%).

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Taşer, Aybüke, and Tuğçe Kazanasmaz. "The Role of Light Shelf and Window Size on Daylight Performance of an Architecture Studio." International Journal of Digital Innovation in the Built Environment 11, no. 3 (June 17, 2022): 1–14. http://dx.doi.org/10.4018/ijdibe.306253.

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Daylight affects our health and comfort. Recently, occupants face thermal and visual comfort problems due to the lack of solar control elements and improper design decisions of glazed surfaces. Recent studies show that solar control systems and window-based variables are some of the most significant variables which influence daylight performance. This study aims to test various combinations of window sizes and light shelf scenarios for a uniform distribution of daylight and visual comfort of occupants in two architecture studios in the İzmir Institute of Technology (IZTECH) Campus. In scenarios; window size and location, exterior and interior light shelves’ height, incline angle, and materials are tested. It is concluded that variables significantly improved the uniform distribution of daylight of both studios and sun patch areas of the south/east-oriented studio. Also, the artificial light requirement of the south/west-oriented studio is improved by 29.36% and 31.75% for the 21st of June and December respectively.

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Yahiaoui, A. "Modelling and hybrid control of building lighting systems." Lighting Research & Technology 50, no. 8 (July 23, 2017): 1225–48. http://dx.doi.org/10.1177/1477153517712781.

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The development of an accurate control system for shading devices, essentially motorised Venetian blinds, relies on the rational use of daylight in buildings. This study proposes a control strategy for building lighting components, both daylighting and artificial lighting, to automatically adjust the light level in an office building as required and to block direct sunlight from entering the office, when necessary. The proposed control strategy is based on a hybrid statecharts model mainly consisting of a supervisory control system that chooses appropriate control actions for a current sky condition depending on the sky ratio and clearness index. These control actions are implemented to automatically adjust the blind height and slat angle, and turn on the artificial lighting only when needed. Real experiments in a test-cell demonstrate the effectiveness and flexibility of the proposed control strategy.

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Ali Ahmed Salem Bahdad and Sharifah Fairuz Syed Fadzil. "Design Optimization for Light-Shelves with Regard to Daylighting Performance Improvements in The Tropics." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 100, no. 3 (December 31, 2022): 35–50. http://dx.doi.org/10.37934/arfmts.100.3.3550.

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Different daylight device systems and control strategies can be employed in different parts of a window system to perform different functions, particularly for fully glazed façades. A light-shelves with parametric control in both portions of the system were proposed in this study as an innovative daylighting device to improve daylighting distribution and glare probability. The aim of this article was to present a simulation study to investigate the influence of light shelves on daylighting performance improvements in buildings located in tropical climates. Multi-objective optimization method was proposed by classifying the results based on sky conditions. The metrics of Useful Daylight Illuminance and Daylight Glare Probability were used to evaluate the daylight performance and glare to compare the final solutions of the blight shelf parameters of the light shelf. The study concludes that daylight improvements by optimal solutions of light shelves can provide the best range of optimal daylighting for visual comfort in office spaces in the tropics. The idea of a light shelf system with parametric control in both portions (inner and outer) provides the most optimal options for achieving balanced daylighting levels in both the front and back of the room. This resulted in a glare-free environment with undetectable glare indices, and acceptable daylight is accomplished, as well as a high percentage coverage within UDI300-2000 lux between 63% and 73.8% at midday and no less than 55% during working hours.

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Kaminska, Aniela, and Andrzej Ożadowicz. "Lighting Control Including Daylight and Energy Efficiency Improvements Analysis." Energies 11, no. 8 (August 19, 2018): 2166. http://dx.doi.org/10.3390/en11082166.

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Energy used for lighting is one of the major components of total energy consumption in buildings. Nowadays, buildings have a great potential to reduce their energy consumption, but to achieve this purpose additional efforts are indispensable. In this study, the need for energy savings evaluation before the implementation of lighting control algorithms for a specified building is highlighted. Therefore, experimental tests have been carried out in a university building with laboratories and other rooms, equipped with KNX building automation system. A dimmable control strategy has been investigated, dependent on daylight illuminance. Moreover, a relationship between external and internal daylight illuminance levels has been evaluated as well. Based on the experimental results, the authors proposed a method for the rough estimation of electrical energy savings. Since, according to the EN 15232 standard, Building Automation and Control Systems (BACS) play an important role in buildings’ energy efficiency improvements, the BACS efficiency factors from this standard have been used to verify the experimental results presented in the paper. The potential to reduce energy consumption from lighting in non-residential buildings by 28% for offices and 24% for educational buildings has been confirmed, but its dependence on specific building parameters has been discussed as well.

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Moon, Jin Woo, Yong-Kyu Baik, and Sooyoung Kim. "Operation guidelines for daylight dimming control systems in an office with lightshelf configurations." Building and Environment 180 (August 2020): 106968. http://dx.doi.org/10.1016/j.buildenv.2020.106968.

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Rayaz, S., and S. Rubab. "Review of Advanced Daylighting Systems." Materials Science Forum 760 (July 2013): 79–84. http://dx.doi.org/10.4028/www.scientific.net/msf.760.79.

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Daylight is the most underutilized resource in modern buildings. Artificial light can be dispensed away in institutional buildings such as offices, banks, schools etc. having only daytime occupancy by proper architectural design of fenestrations The design of a day lighting space is both an art and a science. The biggest challenge facing the lighting designer is to admit only as much light as necessary and distribute it evenly throughout the space without introducing glare or heat. In hot / warm climates, it has become common practice in windows spaces to specify blinds and glazing with high shading coefficients to control glare and minimize heat gain. However, this practice reduces the effectiveness of lighting systems that dim automatically. Improved systems are needed to capture natural daylight and distribute it uniformly throughout a space while controlling heat gain and glare. One such system is the light shelf. Light shelves shade the space from direct sunlight and reflect this sunlight onto the ceiling for a deeper and more uniform distribution. Reflective blinds offer good control of glare and solar protection. Innovative day lighting systems are designed to redirect sunlight or sky light to areas where it is needed with excessive luminance and glare. These systems use optical devices that initiate reflections, refractions, and / or use total internal reflection of sunlight and sky light. Advanced day lighting systems can be designed to actively track the sun or passively control the direct sunlight and sky light. In this paper, we review the state of the art of several advanced day lighting systems which are designed to maximize the energy-saving potential of day lighting, while improving comfort and visual performance at an “affordable” cost.

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Lin, Ching Hai, Hsin Chuan Kuo, and Chao Tsung Lee. "An Intelligent Garbage Can Decision-Making Model Evolution Algorithm on Optimal Design of Fuzzy Controller of Intelligent Lighting Systems." Applied Mechanics and Materials 284-287 (January 2013): 2215–19. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.2215.

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In this paper, an intelligent garbage can model-based differential evolution algorithm (IGCMDE) is proposed to simulate human social organization by its population system, based on the differential evolution algorithms (DEs) and the logical framework of the garbage can decision model with group meeting. When faced with issues such as unclear goals and technologies, participators turnover, etc., representatives of all participating parties will communicate, argue, compromise and adapt with each other, in order to find a solution to the problems. Group meetings are conducted to choose the best solution in a more objective, reasonable and efficient way. At last, we used IGCMDE to optimize the fuzzy controller with fuzzy logic control theory. We present a method for daylight blending control with two novel contributions: 1) smart luminance sensing; 2) daylight luminance control. The proposed method was implemented as an intelligent lighting system in a parking tower environment. The result demonstrated that IGCMDE possesses an excellent search performance and the intelligent lighting system showed significant energy savings.

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Nikolaou, G. I., and A. K. Meresi. "Shading and daylighting strategies in classrooms: a comparative study in the four climate zones in Greece using Daylight Factor values." IOP Conference Series: Earth and Environmental Science 899, no. 1 (November 1, 2021): 012036. http://dx.doi.org/10.1088/1755-1315/899/1/012036.

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Abstract The present work focuses to the efficient use of daylight in school buildings, which has been proved that is able to create a pleasant atmosphere, increase student productivity and comfort and also contribute to energy savings if combined with a daylight-responsive control system. The architectural-bioclimatic design contributes to the creation of technical solutions that provide daylight in existing classrooms, taking into account the climatic conditions and the needs of users. The purpose is to investigate the most prevalent shading and light redirection systems in a typical Greek classroom, in every climatic zone of Greece and come up with the most efficient ones. Research takes into consideration the distribution of daylight on working level and the total heating energy consumption throughout the school year, ensuring conditions of visual comfort. After evaluating and comparing the data, the outcome of this research demonstrates the most efficient shading system for each climatic zone, in order to achieve visual comfort and energy savings.

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Noshin, Sadaf, Humaira Kanwal, and Abrar Ahmad. "A Comparative Study on Daylight Performance Assessment of Light Shelves Based on Inclination." Mehran University Research Journal of Engineering and Technology 39, no. 4 (October 1, 2020): 800–805. http://dx.doi.org/10.22581/muet1982.2004.12.

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Energy consumption of lighting can be reduced by using different daylight control strategies. The rise in environmental distresses requires the necessity of natural light control systems. Light shelf is considered as excellent lighting control scheme that provides great lighting production and inexpensive prospect via entering the daylight inside the space. The aims of this study shows that the daylight efficiency and visual productivity are affected by the design parameters of light shelf such as its angle, location and height. In this research, Autodesk Ecotect 2011 is used for the daylight simulation of summer solstice and winter solstice days under overcast sky conditions on a nominated theoretical study space of an institutional building. Daylight simulation is carried out to evaluate the illuminance requirement within the selected space and analysis is also executed on the model with selected categories of light shelves including different positions, heights and angles. The acquired data is then exported on Radiance software intended for complete day-light investigation. The results of this research shows that external light shelf at a height of 7' and an angle of 20˚ is the most appropriate choice in prevailing the glare and it also enhanced the illuminance level to11.5% in 21st June and 10.6% in 21st December as compared to without light shelves. Furthermore, the shaded range is decreased by the rise in the angle of Light shelf which has a tendency to increase the inside average lighting. Hence, significant consideration should be given to the height and position of light shelves, since it has a superior effect on light shelf performance.

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Şimşek, Gökhan, and Rasim Giray. "Akıllı Aydınlatma Kontrol Sistemleriyle Gün Işığını Yönlendiren Sistemlerin İncelenmesi." Journal of Social Research and Behavioral Sciences 8, no. 16 (October 13, 2022): 728–46. http://dx.doi.org/10.52096/jsrbs.8.16.50.

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The aim of this studys inteligent lighthing system control renewable methods in the framework of continuous use in this direction and to investigate the effect of daylight on the structure of the effective methods which maximize the of dayslight is to examin the performances system of directings the lights of days. Usinge dayslight efectively buy takings advantag of inteligent lighthing system control is a commons are relatet to manys strategi, especialy energys conservations. Eficients the use of dayslight ensure the efficients use of energys at the sametime. Efective the use of dayslight depend on efective the use of economical and natural lighting systems in parallel with the developing technology. This situation also appears as a mechanism that develops in direct proportion to the rate of progress of increasing technologies related to systems that direct daylight. Key Words: Dayslight, Lighthing Smart, System Routers

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Bunjongjit, Sulee, Santipont Ananwattanaporn, Atthapol Ngaopitakkul, Chaiyan Jettanasen, and Theerasak Patcharoen. "Design and Application of Daylight-Based Lighting Controller on LED Luminaire." Applied Sciences 10, no. 10 (May 15, 2020): 3415. http://dx.doi.org/10.3390/app10103415.

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This paper proposes a control circuit for Light Emitting Diode (LED) luminaire based on the amount of daylight. This system uses both natural daylight and artificial light from a luminaire to reach the desired illuminance on a working plane. The control circuit operates by receiving an illuminance value from a light sensor and comparing it with a set value in the microcontroller before limiting the light intensity of LED by sending a control Pulse Width Modulation (PWM) signal to the LED driver. In the experimental setup, the controller and a physical model of a working space were built in order to field test the LED daylight control circuit. Electrical characteristics such as voltage, current, and power were measured with a power meter. Illumination characteristics in terms of illuminance on a working plane were determined using a lux meter. The results from actual field tests revealed that this LED control circuit was able to reduce the power consumption of the lighting system while keeping the illuminance on the working plane at the standard value. Both simulation results and the actual experiment of the control circuit proved that it could be used to improve the energy efficiency of both newly installed and retrofitted lighting systems.

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Petkovic, Milica, Dragana Bajovic, Dejan Vukobratovic, Juraj Machaj, Peter Brida, Graeme McCutcheon, Lina Stankovic, and Vladimir Stankovic. "Smart Dimmable LED Lighting Systems †." Sensors 22, no. 21 (November 5, 2022): 8523. http://dx.doi.org/10.3390/s22218523.

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This paper proposes energy-efficient solutions for the smart light-emitting diode (LED) lighting system, which provides minimal energy consumption while simultaneously satisfying illuminance requirements of the users in a typical office space. In addition to artificial light from dimmable LED lamps, natural daylight coming from external sources, such as windows, is considered as a source of illumination in an indoor environment. In order to reduce total energy consumption, the smart LED system has the possibility to dim LED lamps, resulting in reduced LED output power. Additionally, various LED lamps’ functionality, such as semi-angle of the half illuminance and LED tilting, are introduced as an additional parameter to be optimized to achieve greater energy saving of the designed system. In order to properly exploit external lighting, the idea to reduce overall daylight intensity at a users’ location is realized by the option to dim the windows with a shading factor. Based on the users’ requirements for a minimal and desired level of illumination, the proposed optimization problems can be solved by implementing different optimization algorithms. The obtained solutions are able to give instructions to a smart LED system to manage and control system parameters (LEDs dimming levels, semi-angles of the half illuminance, orientation of LEDs, the shading factor) in order to design total illumination, which ensures minimal energy consumption and users’ satisfaction related to illuminance requirements.

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Kondratieva, N. P., R. I. Korepanov, I. R. Ilyasov, R. G. Bolshin, M. G. Krasnolutskaya, Ye N. Somova, and M. G. Markova. "The Efficiency of Automated Control Microprocessor Systems for LED Irradiation Installations." Agricultural Machinery and Technologies 12, no. 3 (July 26, 2018): 32–37. http://dx.doi.org/10.22314/2073-7599-2018-12-3-32-37.

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Crop productivity is significantly affected by the dose of optical radiation. In particular, southern crops do not have enough time to ripen in a temperate climate because of decreased daylight duration. In conditions of protected soil due to low irradiance and a short daylight duration in autumn-winter months, the cultivation of fully developed plants is possible only with the use of artificial radiation sources. The use of LED phytoinstallations with the help of microprocessorbased automatic control systems allows obtaining the required dose of optical radiation.(Purpose of research)To substantiate, as exemplified by meristematic grape plants, the effectiveness of LED phytoinstallations and their impact on the increase in the leaf surface area; to develop multicolored LED phytoinstallations; to offer new technical solutions to improve the efficiency of the microprocessor system of automatic control of LED phytoinstallations.(Materials and methods)the authors have carried out experiments with meristematic grape plants of RF48 variety (in vitro) at the stages of their rooting and adaptation. The following equipment has been used: LED phytoirradiator with a changing spectrum using a microprocessor control system, “blinking” led phytoirradiator, multicolored phytoiradiator with the addition of UV LEDs. The authors have developed on the basis of microcontroller Arduino uno a microprocessor dispensing system of the spectral components of the areas of the photosynthetically active radiation to automatically control the operation of LEDbased phytoinstallations.(Results and discussion)it has been shown that a LED irradiator with a changing spectral composition, as compared to a luminescent irradiator, at the stage of rooting of grape microsprouts contributes to a significant increase in the leaf surface area of microplants at 100 percent rooting of sprouts. The blinking phytoirradiator and the UVLED phytoirradiator, as compared to the fluorescent ones, contributed to an insignificant increase in leaf area of plants at the adaptation stage of grape microplants.(Conclusions)The authors have confirmed the need to further improve the efficiency of the microprocessorbased automatic control system of LED irradiation installations.

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Bunjongjit, Sulee, and Atthapol Ngaopitakkul. "Feasibility Study and Impact of Daylight on Illumination Control for Energy-Saving Lighting Systems." Sustainability 10, no. 11 (November 7, 2018): 4075. http://dx.doi.org/10.3390/su10114075.

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The main goal of energy conservation should be reducing the consumption of energy resources. Due to energy and environmental concerns in recent years, to reduce energy consumption in a lighting system, which has been one of the prime targets of energy saving, daylighting has been investigated and has become one of the energy-efficiency techniques widely applied in buildings. This paper presents an analysis of T5 fluorescent luminaire lighting control using daylight in a building. The study is conducted in two parts; simulation of a lecture room using the daylighting function of the DIALux program is performed to estimate the effect of daylighting on a task area (workplane). Another part is an experimental setup to evaluate the performance of a lighting control unit that is installed for a T5 fluorescent luminaire with a dimmable electronic ballast. The efficiency of the lighting control in term of illumination on the task area and energy consumption are also evaluated and compared with the standard case. The simulation results show that daylighting increases illuminance on a task area, especially on the window side, so the lighting system can significantly reduce its power consumption compared with a standard case (without lighting control). The experimental result shows that upon installing the lighting control with daylighting, both the average illuminance and the energy consumption in each time period are decreased compared with in the standard case. Lighting control with daylighting tries to set the average illuminance on a task area to less than 500 lux, corresponding to the amount of daylight passing through window shutters. The obtained results are useful for the design of a T5 fluorescent luminaire with lighting control using daylighting in a building lighting system for energy efficiency and reducing energy consumption, including the average illuminance on the task area, according to a relevant standard.

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Qahtan, Abdultawab Mohammed, Diaeldin A. Ebrahim, and Hussein M. Ahmed. "Energy-Saving Potential of Daylighting in the Atria of Colleges in Najran University, Saudi Arabia." International Journal of Built Environment and Sustainability 7, no. 1 (December 31, 2019): 47–55. http://dx.doi.org/10.11113/ijbes.v7.n1.421.

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Daylighting is recognised as an effective strategy for enhancing visual comfort and reducing energy used for electric lighting. Najran University, Saudi Arabia, has 15 colleges for males and 10 colleges for females. Each college has several atria and courtyards for introducing daylighting into the hearts of college buildings. However, the electrical lights used in the colleges atria and linked corridors keep on all the daytime. This study is an attempt to investigate the daylight illuminance level and energy-saving potential on the atria and linked corridors when it incorporates a time-scheduling lighting control system. The field measurements were performed in the College of Applied Medical Sciences. The results indicate that daylight illuminance in the atrium spaces are abundant with an average illumination level on the atrium floor varying from 300 lux to 3 600 lux, depending on the time of the day. In the clear sky climate of Najran city throughout the year, the time-scheduling control system is effective and found to contribute to approximately 43 855.2 kWh of annual energy savings in electrical-lighting consumption in the present case study scenario. The total annual energy savings from all 25 colleges at Najran University is 1 096 380 kWh/year, which results in a cost saving of approximately 93,512.86 USD. There would be additional substantial savings from other atria and courtyards in all of the college buildings throughout the campus

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Journal articles on the topic 'Daylight linked control systems'

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