Research On Tracking Solar-thermal-electricity Conversion System Based On Fresnel Lens

As the global energy crisis continues to intensify,all countries are committed to the development of clean energy.Among them,solar energy has received widespread attention because of its abundant reserves and wide distribution.Therefore,solar power generation technology has become a hot research topic in the field of new energy.In view of the instability of the overall structure of the current solar power generation system,Poor energy storage and other problems,this paper studies the Solar-thermalelectricity conversion system based on Fresnel lens,and the attitude adjustment platform based on the 3-RPS parallel mechanism adjusts the concentrator collector Position and attitude,the solar energy with low energy flow density is continuously converted into high thermal energy for convergence,and transmitted to the Stirling generator through the heat conduction system to make it generate electricity.This paper focuses on the theory of concentrating heat collection,3-RPS parallel sun tracking Research on the control strategy of the attitude adjustment platform and the system Solar-thermal-electricity conversion experiment.In order to improve the effect of concentrating and heat-collecting,this paper,based on the Fresnel lens,a matrix multi-point focusing combination method is used to study the system’s solar and heat collection.According to the performance index of Stirling generator,the concentrating and heat-collecting device is designed and analyzed by Trace Pro simulation.The four-focus matrix concentrator is determined as the solar energy collection device of the system to improve the system’s concentrating and heat-collecting effect,and at the same time,simulate changing the incident angle of sunlight to explore the impact on the performance of the concentrator;The attitude adjustment platform based on the 3-RPS parallel mechanism is used to track the sun.The coordinate transformation algorithm is used to inversely solve the position and attitude of the attitude adjustment platform.At the same time,the velocity Jacobian matrix is established,and the relationship between velocity and acceleration is deduced,and the Monte Carlo method is used to draw out of work space;In ADAMS,the kinematics verification and dynamic analysis of the attitude adjustment platform model are carried out.a single-motion branched-chain semi-closed-loop kinematics control strategy is proposed according to the system control accuracy requirements,and the control mathematical model of a single servo electric cylinder system is built.Based on ADAMS Co-simulation analysis with Simulink verifies that the control strategy enables the attitude control platform to have high tracking accuracy in the control and tracking of the pitch and azimuth axes;Build an experimental platform for the Solar-thermalelectricity conversion system for research.By adjusting the pose parameters of the moving platform of the attitude adjustment platform,the concentrating heat power generation experiment is carried out.The parameters such as the tracking effect of the attitude adjustment platform,the performance of the concentrating heat and the generating power of the Stirling generator are analyzed.The experimental test shows that the generating power of this power generation system can reach 133 W.