燃烧室结构对微热光电系统能量转换的影响分析

针对微热光电系统,设计了4种结构的平行板燃烧室,在考虑辐射表面温度分布的不均匀性和空间辐射角系数的前提下,构建了系统能量转换模型并编制了相应的计算程序.通过计算得出不同结构的平行板燃烧室对系统能量转换的影响,重点分析了喷口形状、多孔介质、催化剂的使用等条件改变时辐射外壁面的温度分布、辐射能光谱分布、各子环节效率和系统整...

Analysis on Effect of Combustor Structure on Energy Transition in Micro-thermophotovoltaic System

Four different plane cell combustors were designed for the micro-thermophotovoltaic system,corresponding energy transition models were constructed and the calculation program was developed,considered the non-uniformity of wall temperature distribution and the radiation view factors.The effects of combustor structures on the energy transition were calculated and the wall temperature distribution,spectrum distribution of radiation energy,efficiency of each part and the electric power output were analyzed when the nozzle shape,porous media and catalyst surface were changed.The results show that the filling of porous media,using of expanding nozzle and catalyst surface can all increase the average wall temperature,change the temperature distribution especially the high temperature area position,thus,the spectrum radiation force and effective radiation energy are improved also.All energy transition aspects of the three systems using the improved combustor structures are better than the round nozzle one,and the system that uses the expanding nozzle and catalyst surface can increase the total efficiency by 56.6% for the same fuel,and its power density can reach to 0.87W/cm3.