Solar light collection from buildings fa?ades

7th International Congress of Engineering Physics

物理学;工业技术

García Cadena, C.^1 ; Sánchez-Pérez, C.^1 ; Tovar Rosas, M.^1

Centro de Ciencias Aplicadas y Desarrollo Tecnológico, Universidad Nacional Autónoma de México, Ciudad Universitaria, Apartado Postal 70-186, México, Distrito Federal

04510, Mexico^1

关键词: Acceptance angle;    Diffuse surfaces;    Equivalent system;    Interior lighting;    Reflective surfaces;    Specular reflecting;    Specular surface;    Sun tracking systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/582/1/012034/pdf
DOI  :  10.1088/1742-6596/582/1/012034

学科分类：工业工程学

来源: IOP

【 摘 要 】

We present an analysis of the light collection from the building's fagade for interior lighting using diffuse reflective surfaces. The use of diffuse surfaces may increase the acceptance angle of such systems, in order to collect more sunlight coming from different directions according to the objects surrounding the building fafade for longer periods of the day without the use of sun tracking systems. We discuss a numerical analysis and experimental results comparing light collection with the proposed system with respect to an equivalent system using specular reflecting surfaces. Results show that the collection is around 50 lx with a system of dimensions 10 cm × 15 cm and is of about of 55% higher than the collection achieved by a system of specular surfaces.