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Thermal performance of micro-combustors with baffles for thermophotovoltaic system

机译:带有挡板的微型燃烧器在热光电系统中的热性能

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This paper presents a hydrogen-fueled micro-combustion system for thermophotovoltaic application. The thermal performances of the micro-combustor with and without baffles have been investigated numerically and experimentally. Dimensionless height λ and distance δ are defined to determine the optimal height and location of the baffles. The highest combustion efficiency is achieved when δ and λ are 0.3 and 0.9, respectively. The blowout limit is extended for the combustors with baffles. Besides, the heat from exhaust gas is recycled to preheat the fresh H_2-air mixture, thereby increasing the mean wall temperature. A high H_2-air mass flow rate will increase the fresh gas temperature but lead to low heat recovery rate.
机译:本文提出了一种用于热光伏应用的氢燃料微燃烧系统。数值和实验研究了带挡板和不带挡板的微型燃烧器的热性能。定义无量纲高度λ和距离δ,以确定挡板的最佳高度和位置。当δ和λ分别为0.3和0.9时,可获得最高的燃烧效率。带挡板的燃烧器的井喷极限得以扩展。此外,来自废气的热量被再循环以预热新鲜的H_2-空气混合物,从而提高了平均壁温。高H_2-空气质量流量将增加新鲜气体温度,但导致低的热回收率。

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