Analysis On The Performance Of Collector Of Dish Concentrator System And Design On Testing Equipments

In the solar power generation system, the solar dish system has many advantages, when compared with trough solar system and solar power tower system, such as a high thermoelectric conversion efficiency and thermal efficiency, and independence. Therefore it is a thermal power generation device with better feasibility and efficiency.In this article, the study mainly focused on the collector of the solar dish system, a series of design, calculation and analysis work on the collector have been carried out.The rotating parabolic concentrator and heat absorber have been designed, including the design of concentrator and the heat absorber’s collection and size design. The performance parameters of the heat absorbers with different opening diameters have been calculated and the performance of the heat absorbers has been analyzed.Through design of the heat absorber, found that the type selection of heat absorber had a certain influence on the collector performance, because the different selection of heat absorber had different concentration ratio, so the collector temperature can be achieved were also different. Secondly, through the study of the heat absorber opening diameter on the collector performance, we found that appropriated to reduce the opening diameter of the heat absorber can improve the performance of collector, when theAcav/Aa=8,the reflection heat loss was minimum, the dish collector can achieved the best performance.The thermal performance on the test collector has been calculated and analyzed, and the heat losses and thermal efficiency of the collector have been calculated. The proportion of the heat loss and the influencing factors of heat loss and thermal efficiency have been analyzed.Through this research, the factors which influence the performance of the collector have been demonstrated clearly, including factors that impact the heat loss and efficiency. In order to complete the optimization of the collector better, the resolutions of reducing the heat loss and improving the thermal efficiency have been proposed.Through calculation, in this study the average efficiency of heat absorber of the experimental collectors reached above90%collector efficiency reached above50%, working performance of this system is stable and the heat performance is good.