Louvre is a common type of shading devices and has been increasingly used in office buildings. Meanwhile, some reflective types of louvre have been used to provide shade and to redirect daylight deep into buildings interior simultaneously. Furthermore, daylighting systems have been recently engaged with automation control to improve their performance and increase their accuracy. Accordingly, automation of a louvre can optimise daylighting performance, maximising visual comfort, and lighting energy saving. In order to maximise the benefits of daylight, these shading devices should be controlled efficiently using advanced control methods. On the other hand, one of the significant application in daylighting systems is the prismatic panel, which was used in several buildings to improve daylighting due to its easy installation, which also based on redirecting the light into the interior of the buildings, besides its reflective and refractive characteristic. This article presents a feasibility study on the combination of two advanced daylighting designs, i.e., prismatic panel and automated louvre, aiming to achieve simultaneous shading and redirecting daylight for better daylight distribution. In the proposed design, the louvre is comprised of prismatic slats, i.e., prismatic panel as slat. The prismatic louvre is implemented virtually based on an algorithmic system using parametric software Grasshopper, in order to control the automation process parametrically as a first step, and then the daylighting performance is simulated using Radiance as a plug-in to Grasshopper. The optical characteristics of the prismatic slats in an automated louvre is investigated. A comparison has been made in simulation between a prismatic panel and the automated louvres with reflective slats and prismatic slats, respectively, to evaluate their daylighting performance in a south-orientated virtual room in New Cairo. The simulation results are given for the conditions of clear sky on the 21st of June, 21st of September, and 21st of December. © 2020 The Author(s). Published by solarlits.com. This is an open access article under the CC BY license (https://creativecommons.org/licenses/by/4.0/).

中文翻译：

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使用自动棱镜百叶窗改善日光分布

天窗是一种常见的遮光设备，已越来越多地用于办公楼中。同时，一些反射型百叶窗已被用于提供阴影并同时将日光重新定向到建筑物内部。此外，日光照明系统最近已与自动化控制结合使用，以改善其性能并提高其准确性。因此，百叶窗的自动化可以优化采光性能，最大化视觉舒适度，并节省照明能源。为了最大程度地利用日光，应使用高级控制方法对这些遮光设备进行有效控制。另一方面，棱镜板在日光系统中的重要应用之一是棱柱形面板，由于其易于安装，该面板在数个建筑物中用于改善日光，除了反射和折射特性外，还基于将光线重定向到建筑物内部。本文介绍了结合两种先进的采光设计（即棱形面板和自动百叶窗）的可行性研究，旨在实现同时遮蔽和重定向日光以更好地分配日光。在提出的设计中，百叶窗由棱形板条组成，即棱形板作为板条。棱镜百叶窗实际上是基于使用参数软件Grasshopper的算法系统来实现的，第一步是参数化地控制自动化过程，然后使用Radiance作为Grasshopper的插件来模拟采光性能。研究了自动百叶窗中棱形板条的光学特性。在棱镜面板和分别带有反射板和棱镜板的自动百叶窗之间的仿真中进行了比较，以评估它们在新开罗朝南的虚拟房间中的采光性能。给出了6月21日，9月21日和12月21日晴空条件下的仿真结果。©2020作者。由solarlits.com发布。这是CC BY许可（https://creativecommons.org/licenses/by/4.0/）下的开放获取文章。和12月21日。©2020作者。由solarlits.com发布。这是CC BY许可（https://creativecommons.org/licenses/by/4.0/）下的开放获取文章。和12月21日。©2020作者。由solarlits.com发布。这是CC BY许可（https://creativecommons.org/licenses/by/4.0/）下的开放获取文章。