The Design And Performance Analysis Of Optical Test System For Sun Simulator

The Sun simulator is the signifacant part in the technology research of solar thermal power generation. It can simulate the light feature in different regions and different seasons in a very short time, obviously satisfying the specific requirements of the experimental study of solar irradiation. Sun simulator can be applied in not only offering the imitated sun environment for testing, but also studying test performance in many fields, such as heating system, heat transfer system and miniature solar thermal power generation system et al. It can provide data guidance for practical, slash cost, improves the success rate.At the same time it can also be used to test the performance of heat storage material of various test and high temperature and ultra high temperature stability test of various kinds of material, thus it is a kind of wide application of laboratory equipment.Optical system which directly decides a series of performance parameters of the sun simulator such as the complexities, the overall performance application domain and so on is both the core component of the sun simulator and important part of the sun simulator design. The design of the optical system mainly includes the selection of light source, the design of snoot, the building of support structure, the establishment of mobile mechanism and the design of light frame et al. Each part of the design will directly affect the overall performance of the optical system.The ideal spot getting from sun simulator should be energy concentrated, illumination uniform and stable spot whose area is usually small. Simulator equipment is a complicated synthesis system and its overall size is usually very big, as well as the components are various. As a result, many error factors will impact on the performance of light spot. However, there are three deviations directly affacting spot among numerous error components. One is angular deviation generated from single light source system and this deviation will have small impacts on the shape of the light spot, as well as change the position of spot. The deviation is mainly caused by accuracy of the parts machining and assembling error, thus the deviation is very difficult to get compensation once the whole assembly get finished. Other two are contact ratio deviation and inclined angle deviation which are respectively generated by light source and snoot. The two deviations can get compensation by not only enhancing machining accuracy during design, but also adjusting mechanis on the scene. Adopting the combination of theoretical calculation and software simulation, this paper respectively analyzes the specific influence generated from the three deviations on spot, summarizes the change law of light spot and proposes compensation scheme, thus obviously provides guidance on the optical system design and on-site adjustment for the sun simulator.