چكيده به لاتين
Electric lighting is the greatest consumer of electricity in commercial buildings and a main source for generation of greenhouse gases. Sunlight is an important source for reducing power consumption. Recently different systems for delivery of sunlight into the building are designed. Rather than using solar panels, which collect solar energy as electricity, store that electric¬ity, and use it to power lights throughout a building, hybrid solar lighting instead transmits the solar energy directly into the structure using opti¬cal fibers. By bypassing this intermediary step, hybrid solar lighting has a much higher efficiency. In this research, four systems are examined: a system with spherical secondary mirror, with parabolic secondary mirror, with no secondary mirror, and with Fresnel lens. Sunlight is captured, guided, and distributed through the concentrator and optical fibers, respectively. It was found through simulation that the first approach gains a high intensity and uniform distribution, the second approach has low intensity and non-uniform distribution and the third with fourth approach obtains very high intensity and non-uniform distribution. Overall, in terms of price and efficiency, the systems with no secondary mirror and Fresnel lens have more advantages. We decided to product Solar Lighting System with Fresnel lens and parabolic mirror. Fresnel lens system demonstrated higher efficiency than parabolic mirror system. The obtained efficiencies for Fresnel lens system with flowing water and the same system with pyrex glass were 37 percent 16 percent respectively.
Keywords: Concentrator, Daylighting, Optical Fiber, Parabolic Mirror, TracePro Software
