This paper concentrates on the issues of daylight optimization in an office building using external shading fins/panels. Vertical shading elements are seen as an important tool of daylight management in buildings, especially when the façade is fully glazed. This enables guiding daylight deep into the room, simultaneously reducing the impact of direct solar radiation.

The presented analysis illustrates the impact of the different spacing of vertical fins on the user’s visual comfort. The analyzed case studies feature different numbers of panels on a south-facing façade located on the 51 deg. latitude in Wrocław, Poland. The daylight calculations were done using De Luminae software (the DL-Light platform) with SketchUp. The analysis of the useful daylight illuminance (UDI) is combined with a caflculation of the maximum drag force acting on the panels installed outside. The research has been conducted taking into account various wind directions. The results show that it is possible to indicate the optimal number of installed vertical fins in order to help increase visual comfort and minimize drag force.

本文着重于使用外部遮阳鳍片/面板的办公大楼中的日光优化问题。垂直阴影元素被视为建筑物中日光管理的重要工具，尤其是在立面完全玻璃化时。这样可以将日光引导到房间深处，同时减少直接太阳辐射的影响。

提出的分析说明了垂直鳍片间距不同对用户视觉舒适度的影响。分析的案例研究在位于51度的朝南立面上具有不同数量的面板。波兰弗罗茨瓦夫的纬度。日光计算是使用带有SketchUp的De Luminae软件（DL-Light平台）完成的。对有用的日照度（UDI）的分析与对安装在外部面板上的最大拉力的计算相结合。进行了考虑各种风向的研究。结果表明，可以指示安装的垂直鳍片的最佳数量，以帮助增加视觉舒适度并将阻力最小化。