Performance Investigation Of Dish Solar Concentrator With Two Reflection Mirror

Energy is the material basis of mankind and social development. The rapid development of human society is also accompanied by high energy consumption. As the main type of energy consumption, fossil fuel is facing shortage of resources, environmental pollution etc. Therefore, it is the inevitable choice for many countries to sustainable development by exploit renewable clean energy.Solar energy as a renewable clean energy attracts more and more attention in the field of energy and environment of many countries. As one of the technologies of solar energy usage, CSP (Concentrated Solar Power) has the splendid prospect in future. Concentrator, a device of concentrating irradiation, plays an important role in efficiency of CSP.Based on the review of CSP and solar concentrator, the thesis discusses the performance of dish solar concentrator with two reflection mirror.We propose two surfaces which is used to concentrate reflected light of dish by optical properties of conic. Location and equation of the two surfaces are calculated by mathematics theory. Relation of first mirror and surfaces is calculated also. We can find that if the aperture of dish is constant, the area of dish is increase more than that of rim angle is less90°. Combined with the simulation of optical software and the location of dish and rotated hyperboloid, we find that the bigger aperture of second mirror, the smaller of focal, and the bigger of shading ratio. Considered the two impacts, we select an best surface and compute the density of focal flux.Based on the idea of beam splitting and the phenomenon that photovoltaic cells are selective to absorb solar energy, the thesis discusses the feasibility of the CPV/CSP system. It is show that the flux received by photovoltaic cell is perfect for High Concentration Photovoltaic. The solar collector can be used for media temperature thermal power generation at the same time.