![]() On the basis of the methods above, the performance of various kinds of materials for solar screens has been investigated, including metal mesh grids, perforated metal screens, and wooden screens. At present, concerns regarding the overall daylight quality of the indoor environment in a room with different shading devices have been increasing, and the research methods have been expanded to a wider range of simulations, regarding daylight, visual comfort, and energy demand, by using climate-based computer-aided dynamic simulation tools. Conventional research on the performance evaluation of shading devices has primarily focused on standard solar transmission (e.g., solar heat gain coefficient) and visible daylight transmittance. ![]() Moreover, much research has been conducted on using solar screens more effectively by adjusting their application methods on the basis of the facade orientation and shading periods. Numerous studies have been conducted on improving the shading performance of solar screens by optimizing their geometrical dimensions, perforation percentages, and textures. As one of the most commonly used external shading devices, a solar screen can efficiently scatter and redirect daylight. Regarding the operable and geometrical property, current solar shading systems consist of the fixed solar shading screen, fixed overhang, grating, operable solar shading screen, Venetian blinds, shutters, and roller blinds. Many studies have demonstrated that external shading presents a better solar shading performance than internal and intermediate shading. ![]() On the basis of spatial positions, solar shading devices can be divided into three categories, namely, external intermediate and intermediate shading systems. Specifically, solar shading systems contribute significantly to controlling glare, regulating solar radiation, homogenizing illuminance levels, and protecting privacy. Using solar shading systems for natural cooling and daylighting control is an extensively researched topic in the area of energy-efficient building design. Optimized building skins can significantly reduce energy consumption for space heating, cooling, and electric lighting. This study illustrated the superiority of the nonuniform woven solar shading screens, which supports a wider application of solar shading screens made of other materials with similar structures and reflectance values. Furthermore, this study proposed two optimal configurations: a screen woven of square sticks and battens with a distance of 10 mm between them, and a screen woven of round sticks and battens with a distance of 8 mm between them. Regarding the structural strength, the screen with a size smaller than or equal to 1 × 1 m withstood a wind load of 12 m/s. Moreover, the screen effectively reduced the negative impact of glare to a level below “imperceptible” and enabled a relatively clear view through the window and shading. The results showed that the nonuniform woven solar shading screen reduced up to 80.3% of the solar radiation gain in a room during summer months while ensuring a relatively even distribution of useful daylight during the year. Then, a series of daylighting simulations were conducted to optimize the configuration of the screen. An on-site experiment and ANSYS simulation were carried out to investigate the basic solar optical performance and structural strength of the proposed screen, respectively. The sustainable material, namely, bamboo, was used as the demonstration material for the screen. This study investigated the potential of using a nonuniform woven panel with nonuniform strips-thick sticks and thin battens-as an external solar shading screen that addressed daylighting, shading, and mechanical performance factors.
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