Structural Design And Thermal Analysis Based On Solar Simulator Photothermal Conversion System

As an important form of solar energy utilization,solar thermal chemical technology can store solar energy resources and achieve the possibility of solar energy utilization across the region and time.The solar simulator and the high temperature thermochemical reactor are the key equipment for the research of solar thermal chemistry.It is of great significance to design the instrument structure to study the reaction mechanism and control the reaction process.The research contents of this paper include the design of solar simulator with high irradiance uniformity and the structural design of high temperature thermochemical reactor.The design work of the solar simulator is based on the requirements of thermochemical technology.The standard ellipsoid condensing unit model is obtained by calculating the structural parameters and optical properties.The influence of different structural parameters on the optical properties of the ellipsoid condenser unit is analyzed.Based on the nonuniformity of the irradiator,the improved design of the standard ellipsoid mirror surface is obtained,and the condensing element model with uniform output energy is obtained.The high power solar simulation is carried out with the condensing unit as the basic component Design work,the simulator uses a seven-disc hexagonal arrangement of the way,access to high irradiance and high radiation uniformity of the energy output.Based on the solar simulator,a high temperature thermochemical reactor was designed.The model of photothermal transformation of the solar simulator and the reactor was established.The energy distribution of the wall of the reaction chamber and the heat transport characteristics of the reactor were calculated and analyzed.Aiming at the analysis results,the structural model of the reactor was further improved.The cone-shaped reaction chamber model was proposed.The energy distribution and heat transport characteristics of the wall were calculated by the photothermal transformation model.The results show that the improved reactor The structure can achieve higher cavity temperature and better aerodynamic characteristics.The research work of this paper aims to create the conditions for the experimental study of solar thermal chemistry technology,laying a foundation for the research andprocess control of the subsequent thermochemical reaction.