Study of transmissive solar concentrating system for glass curtain wall

A new type of transmissive concentrating system for glass curtain wall is designed, and optical software is used to simulate the concentrating characteristics of the system at different incident angles. Performance of concentrating system is analyzed about the influence of different wall thicknesses and different structures. Simulation results show that: receiving rate is higher and transmittance is lower when the incident angle is smaller; and CPC structure is better than others in daylighting control of building. According to the simulation results, the experimental samples were made and tested in a typical sunny weather. The experimental results and simulation results are matched well. The minimum transmittance of system is 28.2% at noon and it can exceed 55% before 09:40 AM or after 15:40 PM. The results show that the glass curtain wall system based on the new transmissive concentrating system can realize the light control function well, also can further utilize the energy and have good application prospect. © 2020, Editorial Board of Acta Energiae Solaris Sinica. All right reserved.