Numerical study on combustion and energy efficiency characteristics of thermophotovoltaic-thermoelectric two-stage utilization system filled with porous media

Yunfei Yan, Yu Wei, Dandan Wang, Jingxiang You, Ziqiang He and Chenghua Zhang

Energy, 2024, vol. 308, issue C

Abstract: Addressing the issues of low energy conversion efficiency and unstable combustion at the micro-scale resulting from significant energy loss in micro-energy systems, this paper proposes a two-stage utilization system integrating thermo-photovoltaic-thermoelectric technology filled with porous media. The research explored the impact of the placement, thickness, and porosity of porous media on both combustion and energy efficiency within a two-stage utilization system. Performance evaluation indexes such as temperature distribution, pressure drop loss, output power, and efficiency revealed the combustion characteristics of porous media at the micro-scale. The results indicate that the mean outer wall temperature of MTPV increases by 174.3 K as the porous media transitioned from a partially filled to a fully filled state. After comprehensive consideration of various factors, the optimal layout parameter for porous media is determined to be a two-stage uniform filling of porous media (SS304 with a porosity of 0.86 and a thickness of 14 mm). Consequently, the two-stage combustion system achieves an output power of 14.88 W and an energy conversion efficiency of 7.33 %.

Keywords: Micro combustion; MTPV; MTEG; Energy output; Porous media combustion (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:308:y:2024:i:c:s0360544224026835

DOI: 10.1016/j.energy.2024.132909

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