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Application
Published in Benny Raphael, Construction and Building Automation, 2023
Energy savings and visual comfort are the main parameters that could be used to quantify the benefits of daylighting features. Energy savings result from reduced power consumption of artificial lights when daylight is available. Energy savings are computed like this: Calculate the annual energy consumption when the lights are on all the time at full power, that is, without using any daylighting features.Calculate the annual energy consumption assuming that the lights are dimmed or switched off when adequate daylight is availableThe difference between the calculations gives the energy savings through the use of daylighting feature
Daylighting
Published in Michael Stiller, Quality Lighting for High Performance Buildings, 2020
Daylighting is the practice of placing windows or other openings in relation to reflective interior surfaces in a building so that, during the day, natural light provides effective interior illumination. Particular attention should be given to incorporating daylighting techniques when designing a building where the aim is to create a healthy, productive, visually comfortable, and inviting environment while simultaneously reducing energy use. There are many clear advantages to incorporating daylight into interior spaces. One of the most obvious is that the more we use natural daylight, the less we will need to rely on electric lighting, and the more we can reduce energy use and minimize our carbon footprint. But daylighting brings advantages beyond satisfying our need to live and work in a more environmentally sustainable way. The psychological and physiological benefits of daylighting have been the subject of many studies, including some that examine the positive activation of the human circadian system by daylight, and others that concentrate on a presumed innate tendency to want a connection with the outside (natural) world. Though the scientific jury may still be out as to the specific reasons why, it is nonetheless widely accepted that having access to natural light is desirable, and that it can contribute to, and enhance, human health and wellbeing. [12]
Advances in daylighting and artificial lighting
Published in J. Carmeliet, H. Hens, G. Vermeir, Research in Building Physics, 2020
Through a better distribution of daylight in spaces, daylighting systems and components integrated into building envelopes can substantially reduce the energy consumption by substituting artificial light with daylight. A large variety of novel daylighting systems and components have consequently been developed over the last 10 years as a way to foster the use of daylighting technology in non-residential buildings (Littlefair 1990, Miloni et al. 1997). Different approaches were used for that purpose, based on the principal physical phenomena altering light propagation, including scattering and diffusion (aerogels, Dengler & Wittwer 1994, capillary structures, Okalux 1996), specular reflection (reflective lamellae, Köster 1989), total internal reflection (light redirecting window, Federmann 1996, sun-directing glass, Müller 1996), optical refraction (prismatic panels, Siemens 1996, prismatic films Withehead et al. 1982) and optical diffraction (holographic optical elements, Müller 1994).
Design optimization of daylighting for kindergarten in different light climate zones in China
Published in Journal of Asian Architecture and Building Engineering, 2023
Faxing Zhu, Yizhe Xu, Yanlong Jiang
Daylighting is an important element in the building lighting environment and is often used as the objective of building design optimization. Compared with artificial lighting, daylighting has significant advantages in terms of health, comfort and energy savings but also has problems, such as glare (Samiou, Doulos, and Zerefos 2022). Therefore, the rational and efficient use of daylighting has always been one of the key points in building optimization (Fakhari, Fayaz, and Asadi 2021). Different types of buildings have different requirements for daylighting quality, and educational buildings pay special attention to daylighting because daylighting importantly affects the growth and development of students (Alkhatatbeh and Asadi 2021). Especially for children (4–6 years old) (Stankovic et al. 2015), daylighting not only affects their visual development but also directly affects a series of biological functions. Proper daylighting helps reduce the myopia rate of children and promote the healthy development of their visual perception system (Tsikra and Andreou 2017; Kurdi et al. 2022).
The study on the current illumination inside the double sided illuminating clinics by computer imitation
Published in Journal of Industrial and Production Engineering, 2023
Daylighting is directing natural light from the exterior of a building to achieve the purpose of illumination. Daylight is beneficial to the health and comfort of patients, as well as medical diagnosis. Ninety-two percent of the patients suggest that sunlight in the wards makes them feel comfortable, 70% of the medical staff suggest sunlight is helpful for increasing work productivity, and 78% of the medical staff suggest that sunlight has the effect of hastening recovery and shortening the time of hospitalization [6]. Human behavioral patterns are easily influenced by lighting [7,8,]. Nonvisual effects from lighting include when the human eye catches light stimulating visual systems in the brain, as well as areas that control physiological hormones influencing the body’s hormone cycles [9,10,]. Benke and Benke pointed out that daylighting had very positive effects on the health, behaviors, awakening, and sleep quality of the human body [11]; therefore, medical practices should focus on providing natural sunlight and fresh air for patients [12]. Natural daylighting can improve the performance of nursing staff, reducing mistakes, and increasing task satisfaction, as well as improving patients’ recovery [13].
Evaluating the visual comfort of Orosi windows in hot and semi-arid climates through climate-based daylight metrics: a quantitative study
Published in Journal of Asian Architecture and Building Engineering, 2022
Ali Omidi, Navid Golchin, Seyed Ehsan Masoud
Daylighting is one of the most important design strategies in architecture, which effectively facilitates the use of daylight that is transmitted into space through the openings. Daylighting affords more visual comfort in interior and less consumption of energy in the building (Apian-Bennewitz et al. 1998). The act of controlling and distributing the natural light, by ignoring or accepting it, is provided by the daylight systems (Baker and Steemers 2002). Estimations show that the optimization of daylight systems, improving the natural light distribution, results in saving at least 9% of consumed energy, mechanical and electrical, by buildings (Urbana Gutierrez et al. 2019). Accordingly, as one of the leading parts of the optimum natural light distribution, daylight systems on façades are strategically important. Transmitting daylight into building needs carefully considered factors on its façade such as window parameters (Mardaljevic, Heschong, and Lee 2009; Rockcastle and Andersen 2014). Vertical windows, the most common (Ander 2003), are a subset of the main category of daylight systems called side-lightings. They are the most-used components in every kind of buildings to provide daylight. Unguarded windows create two situations: Leading excessive daylight into buildings that cause glare in an over-lit space and lack of sufficient daylight in some areas that cause more use of artificial lighting. Visual comfort cannot take place in this so-called situation; therefore, using a proper daylight system would bring a desirable uniformity, based on natural light, to interior spaces.