Multi-criteria design techniques applied to the analysis of shading devices of buildings have arisen as useful tools for architects. Even though several techniques have been applied to shading devices with simple geometries, they usually require numerous simulations to suitably complete the analysis, making the optimization process time-consuming. Since shading devices should prevent damage to furnishings and materials, performance indicators may not be related exclusively to thermal comfort, energy consumption and daylight performance, but also to other important criteria, such as fading protection. To overcome these limitations, this study aims to present a multi-criteria method for the design of shading devices, including fading protection as an evaluation criterion, regardless of geometry complexity. The method is applied to perforated shading devices of a room office, considering as the design objectives the energy savings, daylight availability on the work plane and solar beam incidence on interior surfaces. As a novelty, a more practical approach is proposed based on two main steps: search process, for obtaining a set of non-dominated solutions, and physical programming method, in which the solutions are ranked according to the preferences of decision makers. Besides, the solar beam incidence on interior surfaces is evaluated by using a pixel counting based method, which was emerged as a powerful algorithm due its capacity to simulate any geometry with accuracy and low computational cost. The results have shown that the proposed method is an effective process in designing of the optimal shading devices to reduce energy consumption, and improve the daylight use and the fading protection, regardless of the geometry complexity.

应用于建筑遮阳设备分析的多准则设计技术已成为建筑师的有用工具。尽管已经将几种技术应用于具有简单几何形状的遮光设备，但是它们通常需要大量模拟才能适当地完成分析，从而使优化过程非常耗时。由于遮光设备应防止损坏家具和材料，因此性能指标可能不仅与热舒适性，能耗和日光性能有关，而且还与其他重要标准（例如褪色保护）有关。为了克服这些局限性，本研究旨在提出一种用于遮光设备设计的多准则方法，包括将褪色保护作为评估准则，而与几何形状的复杂性无关。将该方法应用于房间办公室的穿孔遮阳设备，将节能，工作平面上的日光利用率以及内表面的太阳光束入射作为设计目标。作为一种新颖性，基于两个主要步骤提出了一种更实用的方法：搜索过程（用于获得一组非支配的解决方案）和物理编程方法（根据决策者的偏好对解决方案进行排名）。此外，通过使用基于像素计数的方法来评估太阳光束在室内表面上的入射，该方法由于其能够精确且低计算成本地模拟任何几何形状而成为一种功能强大的算法。结果表明，该方法是设计最佳遮阳设备以降低能耗的有效过程，