Simulation Research On Temperature Management Of Solar Photovoltaic Building Integration Photovoltaic Panel Based On Phase Change Heat Storage

Solar energy has the advantages of abundant reserves,wide distribution,cleanliness,and inexhaustible availability,and has great potential for development.Building integration of solar energy and photovoltaic is one of the effective ways of solar energy utilization,which can effectively solve the limitation of building concentration on the area of light,However,the efficiency of photovoltaic power generation is significantly affected by the temperature of photovoltaic cells.Temperature management of the solar building integrated photovoltaic power generation system can effectively improve the power generation efficiency of the solar building photovoltaic power generation system.This paper draws on the design concept of arranging different phase change materials in different flow sections of the tubular axial direction for temperature management,and fully considers the thermophysical properties of phase change materials and the integrated characteristics of solar photovoltaic buildings,and designs a double-layer phase change material package.Structure,and use numerical simulation methods for performance analysis and research.The paper constructs a solar building integrated photovoltaic panel temperature management model with a double-layer phase change heat storage material encapsulation structure,and builds a numerical analysis model on this basis.The layered structure is used as a fin inside the phase change material,and the aluminum sheet has high thermal conductivity.Rate improvement of the traditional single-layer structure phase change material internal thermal conductivity caused by the low thermal conductivity of the phase change temperature control system is not sensitive to temperature rise.The addition of fins in the layer enables heat to be transferred to the second layer along the aluminum packaging structure with high thermal conductivity,and enables heat to be transferred to the inside of the phase change material,enhancing the energy driving force of the natural convection of the phase change material in the melting process,Solve the problem that the second layer’s heat absorption capacity is not strong after the structure is stratified,and the melting process is slow.The results show that the layered encapsulation of the structure significantly improves the temperature control ability of the system under the same phase change volume.The double-layer structure has a maximum temperature control ability of 8%compared to the single-layer structure.The management time of the single-layer structure is 690s longer than that of the double-layer encapsulated 5-fin structure,and the management time is shortened by about 7%after layering.Under the same fin volume fraction,the increase in the number of fins can improve the synchronization of the melting of the two layers of phase change materials.The increase in the number of fins has an inverse relationship with the decrease rate of the actual output efficiency of the system.However,the increase of the fin fraction will lead to the decrease of the control ability of the system in the second half of the phase change material melting phase.The layering of phase change materials can significantly increase the actual output power of the system,up to 0.7%.