201 / 2022-02-14 21:28:14

Design of Solar Concentrating Shutter Module Based on Light Distribution

solar concentrating shutter,optical characteristics,module design,hierarchical utilization,experimental study

（3）能源与可持续绿色发展 > 8. 可持续设计研究

ABSTRACT: Building integrated concentrating technology is a new and efficient form of solar energy utilization, which can realize the hierarchical utilization of sunlight. Based on the linear Fresnel lens, a spotlight shutter module suitable for building integration was designed in this study. Direct light was concentrated for energy production, and diffuse light was used for daylighting by the shutter. In order to better balance the structural form, energy efficiency and light penetration of the shutter, the optical characteristics of the lens and the receiving surface at different distances and deviation angles were studied through the solar dynamic tracking experiment under real conditions. The results showed that the concentrated efficiency of Fresnel lens was 77.1% under the condition of vertical incidence. When the spacing in the range of 41mm-58mm, light concentrated efficiency was above 53.4% with the receiver width 10mm. Optical efficiency in 5mm region was the most sensitive to the deviation angle. The allowable deviation angle of 50mm was larger than 55mm. The efficiency in a 10mm width was above 47% when the deviation angle was less than 4° and the spacing was 50mm. Through the study of optical characteristics under different incident conditions, it was finally determined that the optimum spacing was 50mm, width of the receiver was 10mm and the allowable deviation was 4°.

KEYWORDS: solar concentrating shutter, optical characteristics, module design, hierarchical utilization, experimental study