Research On The Integrated Photovoltaic And Thermal Combined System Of Concentrating And Heat Collecting

Among the many renewable energy sources currently used,solar energy is favored due to its advantages such as sufficient reserves,simple application form and clean use process.Among the utilization forms of solar energy,the technology of photovoltaic power generation and photothermal power generation is the most mature and widely used.Among them,in the working process of photovoltaic power generation cells,the excitation of electron-hole pairs only needs to be equivalent to the forbidden band value of photovoltaic cells.The energy released by photons,that is,the battery cannot fully convert and utilize solar energy.The heat generated during the thermalization process and the unusable low-energy photons limit the energy utilization rate.Therefore,the optimization of the utilization rate of photovoltaic cells is of great significance at present.In addition,some areas are not rich in solar energy resources.In order to reduce system costs,improve the economic performance of photovoltaic modules and the utilization rate of solar energy,solar energy can be concentrated at a high density through the application of concentrating devices,thereby increasing the output energy of photovoltaic cells.This paper takes photovoltaic cells and thermoelectric cells as the main body,and analyzes them through simulation and experiments.The main contents of the research are as follows.In this study,we analyzed the system design method of combining photovoltaic power generation and thermoelectric power generation.The designed system starts from the perspective of concentrating light and heat at the same time,allowing the thermoelectric battery to use the accumulated heat and convert it into electrical energy.The system will also be designed from the perspectives of economy,portability,and system energy utilization.First of all,this paper will conduct research and design from the perspective of layered concentrating,and design an integrated system model of concentrating and heat collection.The"photothermal separation and concentration"method is adopted to change the design method of the traditional photovoltaic thermoelectric coupling system,and the low-power concentrated photovoltaic system is combined with the photothermal thermoelectric system.The working principles of each part of the system are analyzed and introduced.Secondly,this paper will construct the mathematical model for calculating the power generation part of the system and the heat transfer balance model of the system.By building an ANSYS model,the temperature simulation analysis of each component of the heat collecting layer is carried out,and the system output is simulated and calculated according to the measured environmental data.The simulation result obtained is that the comprehensive output efficiency of the system can reach up to 27.01%.In addition,this study will use Trace Pro to conduct optical simulation analysis on the system’s concentrating photovoltaic and heat collection thermoelectric system models,and use the data obtained from the simulation to simulate and analyze the power generation of the system.This paper will record the radiation intensity of the surface of the photovoltaic cell and the central area of the copper plate in the system with an environmental radiation value of 600～1100W/m~2,and analyze the result data obtained from the simulation.Analyze the energy distribution on the surface of the photovoltaic cell and heat-collecting layer,and consider the temperature rise and power generation of the photovoltaic cell and heat-collecting layer under different irradiation values.When the ambient radiation is1100W/m~2,the photovoltaic part of the system The highest power generation capacity is 16413.3J,and the output power of a single thermoelectric battery is 0.29W.In the test part of this paper,Proe is used to carry out three-dimensional modeling of the designed test frame,and the physical frame used in the test is built according to the established model,and the test test is carried out in Harbin.The test results show that:the concentrating photovoltaic and heat collection thermoelectric combined power generation system meets the requirements of reliability and full utilization of solar energy.According to the measured experimental data,the highest output power of the photovoltaic power generation part and the thermoelectric power generation part in the system are 1.66W and 0.61W respectively,the power generation efficiency of the photovoltaic cell in the system can reach up to 19.89%,and the power generation efficiency of the thermoelectric cell can reach up to 6.47%%,the comprehensive power generation efficiency of the measured system can reach 26.01%.