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Daylighting is one of the sustainable methods of controlling the flow of natural light into the interior surfaces of the building. Over past years of research daylighting are analyzed through simulation tools due to consistent and precise predictions. The aim of the research is to evaluate the daylight availability in an industrial building under a...
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... Figure 2, the industrial building is modelled in the software and rendered for the daylighting simulation. For the effectiveness, the compartments are filled with different tools, machines and equipment's mentioned (in Table 1) as grey for finding the proper daylighting in working building respectively. ...Similar publications
Energy crisis become the major obstacle of development for last few decades in Bangladesh. This small developing country is not even near to fulfill the electricity consumption of its large population, rather people are not often interested to optimize the use of electricity. Optimum use of artificial lighting is important as well as increase use o...
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... Numerous investigations have verified the proper functioning of this computational tool [26,27], confirming its precision by implementing the CIE (Commission International de l'Eclairage) test cases [28]. At present, several studies focused on daylighting employ this simulation program [29][30][31][32]. ...
In recent years, with the frequently discussed concept of sustainability, designers have been increasingly demanded to improve spatial comfort conditions. The growing emphasis on energy efficiency in design has led designers to consider these issues at earlier stages of the design process. Daylight, seen as a clean, uninterrupted energy source and a cost-effective alternative to artificial lighting, also ensures visual comfort for individuals due to its good color rendering. Despite all these well-known benefits, design criteria have not been established to reduce the energy consumption rate caused by artificial lighting while taking into account the factors affecting daylight, an important input. This study presents an investigation aimed at achieving energy savings in lighting by using the ideal window concept and other parameters to optimally benefit from daylight. The study has been applied under cloudy sky and deep room conditions, which represent the worst-case scenarios. As an alternative to time-consuming mathematical calculations, the Velux Daylight Visualizer lighting simulation program was used to create three-dimensional designs for horizontal, vertical, square, and roof windows separately, and the effects of these windows on the daylight factor were analyzed. The impact of different furniture colors in the interior space was also examined. Following the investigations, it was observed that roof windows produced more daylight compared to others. However, since roof windows cannot be used in multi-story buildings, a comparison was made between horizontal, vertical, and square windows, and it was concluded that horizontal windows placed close to the upper wall were more efficient than the others. In addition, it was observed that lighter-colored furniture, among the light and dark furniture, produced more daylight compared to the other.
... It passed all of the CIE 171:2006 natural lighting test situations. Although the software has been validated by precedent studies [34,35], it is validated again via computer simulation versus field measurement comparison to establish its accuracy in simulating for the tropical Malaysian climate. ...
This paper proposes that the light intensities of adjacent interior spaces should be concurrently evaluated to reduce the risk of glare when evacuees transition between spaces to reach the final exit. The prevention of glare during daytime evacuation has the potential to smoothen the evacuation process from a building. As all legislative, regulatory, and assessment tool recommendations currently used in Malaysia measure illuminance (in lux), this paper similarly evaluates illuminance instead of luminance for ease of initial adoption in the country. Illuminance recommendations in MS1525:2019, LEED, DOSH Guidelines, UBBL, GBI, GreenRE, Melaka Green Seal, and MyCREST were compared to determine the contrast ratio. The illuminance contrast is greatest at the final exit points, such as from parking structures, lobbies, and staircases, which are benchmarked against the Malaysian sky illuminance that can reach 100,000 lux. A contrast ratio as high as 2000:1 may occur if Malaysian offices were designed to only achieve the minimum illuminance requirements. Of the three assessed final exit spaces, naturally-lit fire escape staircases were selected for modelled simulation of illuminance performance using VELUX Daylight Visualiser 2. The findings ascertained that most typical staircase layouts are able to exceed the minimum illuminance requirements at noon, when the sun is potentially the most intense, although the contrast ratio may still reach 1480:1. While the contrast between intermediate spaces are acceptable, those between the final exit transitions and the outdoors are high, suggesting a risk of glare. Further studies are required to determine strategies to facilitate visual adaptation for Malaysians, such as the identification of an ideal acceptable illuminance contrast ratio, temporal adaptation period, or distance-based parameters.
... Efforts to reduce building energy consumption require a strategy that can help achieve this, starting from an active strategy to a passive strategy. Utilization of natural lighting is a sustainable method for controlling the flow of natural light [18][19][20], placing courtyards in building designs [21], using energy-efficient ventilation [22], applying horizontal grids and overhangs [23] building wall materials that can control thermals [24][25][26], the use of window glass materials [27]. Another strategy is in the form of solar power plants [28][29][30]. ...
... Top lighting systems represent an optimum source of natural light for building interiors. These systems provide abundant illuminance levels from small openings, and thereby, reducing artificial lighting and minimizing glazing areas [2]. Top lighting provides daylight from above and can generally provide the most uniform illumination throughout a space. ...
... Top lighting reduces the likelihood of glare and allows for a more even distribution of daylight within the space. Combinations of side lighting with top lighting can also be successful in providing uniform illumination levels [2,3]. ...
... In previous studies, daylighting has been analyzed via simulation tools owing to consistent and precise predictions. Hence, by improving the design of buildings for efficient daylighting, the annual energy cost of investing in artificial lighting and for industrial operation in a certain period can be restricted [2,3]. ...
The indoor climate of industrial buildings is a function of production technology and requirements for the creation of an optimal artificial material environment. Currently, we consider daylight not only as a source of illumination, but also as an aesthetic element of a building or a way of reducing energy consumption. Light in a closed space allows a person to obtain basic visual information (perception) and perform visual tasks. Top lighting schemes can provide increasingly more useful illumination from smaller apertures than side lighting when they capture and diffuse sunlight. Sunlight is roughly 10 times brighter than light from the sky or clouds. A combined lighting system (top lighting and side lighting) ensures a better light distribution in industrial buildings. In this study, we present a comparison of daylight factors for different types of skylights. Specifically, a saddle skylight in the hall and three other types of skylights were created and simulated. In all the cases, the models of skylights were prepared and simulated using RADIANCE. Additionally, a comparison of simulation results obtained with RADIANCE was conducted to quantify the lighting climate. Overall, saddle roof was considered as the best choice for daylight in an industrial hall.
... It is determined on the basis of reflectivity and illuminance of surfaces. Therefore, in order to increase the adaptation levels and visual comfort of users, it is more appropriate if the areas in the rooms are as bright as possible [43][44][45][46]. ...
The main goal of this paper is to evaluate the effect of color changes on the interior surfaces of a selected hall on the level of daylight, represented by the DF factor. A single-story hall was chosen as the reference building, in which daylight falls through the side windows and a skylight at roof level. Measurement of the level of daylight in the real state of the building (in situ) was carried out. The measurement took place when the external boundary conditions of the measurement were met (external state of the sky). A survey was conducted among users, in which they considered the visual perception of the environment and what colors would be suitable for the walls, ceiling, and floor in the working environment of the hall. The evaluation of the respondents who considered the color of the floor was interesting, and several agreed that the floor should be brown. After debugging the model for the simulation based on the actual state of the measurement, simulation calculations were performed with selected surface colors in the interior of the hall. Computational simulations were performed for changing calculation boundary conditions. Daylight Factors (DF) (%) were evaluated, namely minimum, maximum, and average DF values for 15 selected simulations. The calculations were performed in the RADIANCE simulation program. Simulations included the change in the surface color of the simulated wall and the current ceiling surface color, the color of the simulated ceiling surface and the current wall surface color, and the color of the simulated wall and ceiling
at the same time. The floor color did not change during the evaluation; it was considered brown. Based on the evaluation of AHP, evaluations of the significance and comparability of colored areas were performed. The value of the average DF was chosen as the most important, the less significant minimum DF value was chosen, and the maximum DF value was considered in the last place. The results show that white, gray, green, or yellow walls, white ceiling, and brown floor were rated as the most suitable for the interior surfaces in the considered hall.
... estimation is measured perpendicular to the window position [21]. In Fig.2, SC point ( ) which is located at a distance perpendicular to the window with size × on the axis , where is the height of the window at points ( ) and is the width of the window at the point ( ) ...
Natural lighting is an important factor that affects the comfort of building users. Natural lighting in a room requires a window area of at least 1/6 of the floor area. This study was conducted to obtain the distribution of Daylight Factor (DF) as a natural lighting factor during the day in the room, based on the shift in the position of the window on the wall. The distribution of lighting entering the depth of the room through window openings is a tool to compare the best window position in the spread of illumination with DF calculations based on Sky Component (SC). Shifting the window position will be analyzed by Standard Deviation (S) and Mean (μ) based on the DF distribution. Optimizations of the DF distribution on the window position shifts if it has the largest DF mean value and the smallest DF variant value. The results of the study in a simple room showed that the optimal DF distribution was at the window position in the middle and the mean value was 2.59%. The relationship of shifting window position and DF distribution can be useful for architects to determine the function of a room in architectural design.
... With the further improvement of China's building energy efficiency standards, the energysaving design of windows will become more and more important [16]. As an important part of building envelope, windows take on lighting and ventilation to meet the requirements of indoor environment [17]. How to do a good job in the huge and arduous task of building energy conservation on the premise of ensuring economic development and environmental protection is a serious challenge we will face [18]. ...
The indoor light environment of the building has an extremely important influence on its own use function, and there are many factors that affect the indoor light environment of the building, such as the surrounding environment of the building, the interior decoration of the building, and the design of the window. The window is used as the building envelope. An important part of the structure is responsible for lighting and ventilation to meet the requirements of the indoor environment. It exists as a lighting device for the building. The lighting performance of the windows not only meets people's requirements for living comfort, but also consumes energy in the building. It will have a very important impact. A variety of window shapes start from different functional needs. The comprehensive use of these window shapes by traditional buildings together creates its unique thermodynamic function. This article analyzes cold regions based on the analysis method of thermodynamic functions. Solar heat gain from traditional building windows.
