The Research On Combustion And Radiation Performance Of MTPV System

The micro thermophotovoltaic (MTPV) system is one kind of micro powergeneration devices, which use Photovoltaic Cells (PV cells) to convert photonradiation energy of the micro combustor into electrical energy. Due to its advantagesincluding large fuel resources, high energy density, good stability, and no movableparts, the MTPV system has broad application prospects. Among the MTPV system,the micro combustor is the core component, which combustion and radiationperformance have direct influences on the output energy efficiency of thesystem.Therefore, according to the condition of conversion efficiency of the PV cells,strengthening the internal combustion intensity selection and raising material radiationintensity of the micro-burner have great importance to improve the output efficiency ofthe MTPV system.In this paper the combustion and radiation experiments of the micro-burner wereinvestigated with different structural micro-burners and variable porosity. As theexperimental results show, properly choosing the micro-burner structures and internalporosity distribution can improve the combustion processes of the micro-burner, andoptimize the wall temperature distribution, which consequently would achieve the goalof improving energy utilization efficiency. And those would provide theoreticalsupports to the final design and exploitation of the micro-burner.The radiation performance of the micro-burner is determined by the nature of thematerial, the spectral radiation analysis and comparison of four kinds of material of themicro combustor were investigated in this paper. As the experimental results show, theSiC material has the highest radiation performance, while the Al2O3material will bemore suitable for this research project.The exhaust analysis was introduced to the experimental research work of theMTPV systems. Through the exhaust collection and analysis of the micro-burner under different working conditions, the analysis method of internal combustionprocess in the micro-burner has been enriched, which consequently would providereference basis for micro burner’s economic combustion.The grey system theory provides an effective analysis method for the study ofthe MTPV system. This article focuses on the research of the grey prediction andanalysis of factors correlation which includes the micro combustor structure, thevariable porosity, the fuel flow and the mixture ratio of gas fuels, and those studieshave achieved good results, which consequently would point out the direction forfuture research of the MTPV system.