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Experimental and numerical investigation of a micro-thermophotovoltaic system with different backward-facing steps and wall thicknesses

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  • Peng, Qingguo
  • Jiaqiang, E
  • Yang, W.M.
  • Xu, Hongpeng
  • Chen, Jingwei
  • Zhang, Feng
  • Meng, Tian
  • Qiu, Runzhi

Abstract

The combustion characteristics and thermal performance of a premixed H2/air combustion in the micro-combustor with a backward-facing step is studied through experimental tests and numerical simulations. The effects of step length and wall thickness on the flame stability and thermal performance of the micro-combustor are presented and compared. The results show that the outer wall temperature can be improved by the reduction of wall thickness and modified through the relocation of the high temperature zone. With the decrease of the step length, the flame location is reduced in the combustion chamber, while the same location of peak temperature is obtained in the combustors with varied wall thicknesses. The efficiency of the micro thermophotovoltaic (micro-TPV) system with GaSb and InGaAsSb PV cells are calculated and compared. The micro-TPV system with GaInAsSb PV cells and the micro-combustor with step length 5 mm and outer diameter 3.6 mm produced the highest energy output and efficiency.

Suggested Citation

  • Peng, Qingguo & Jiaqiang, E & Yang, W.M. & Xu, Hongpeng & Chen, Jingwei & Zhang, Feng & Meng, Tian & Qiu, Runzhi, 2019. "Experimental and numerical investigation of a micro-thermophotovoltaic system with different backward-facing steps and wall thicknesses," Energy, Elsevier, vol. 173(C), pages 540-547.
    • Handle: RePEc:eee:energy:v:173:y:2019:i:c:p:540-547
    DOI: 10.1016/j.energy.2019.02.093
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    5. Peng, Qingguo & Wu, Yifeng & E, Jiaqiang & Yang, Wenming & Xu, Hongpeng & Li, Zhenwei, 2019. "Combustion characteristics and thermal performance of premixed hydrogen-air in a two-rearward-step micro tube," Applied Energy, Elsevier, vol. 242(C), pages 424-438.
    6. Peng, Qingguo & Shi, Zhiwei & Xie, Bo & Huang, Zhixin & Tang, Shihao & Li, Xianhua & Huang, Haisong & E, Jiaqiang, 2023. "Optimisation of a micro-thermophotovoltaic with porous media inserted burner for electrical power improvement," Renewable Energy, Elsevier, vol. 215(C).
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    9. Sun, Bowen & Kang, Xin & Wang, Yu, 2020. "Numerical investigations on the methane-oxygen diffusion flame-street phenomena in a microchannel: Effects of wall temperatures, inflow rates and global equivalence ratios on flame behaviors and combu," Energy, Elsevier, vol. 207(C).
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    12. Xie, Bo & Peng, Qingguo & E, Jiaqiang & Tu, Yaojie & Wei, Jia & Tang, Shihao & Song, Yangyang & Fu, Guang, 2022. "Effects of CO addition and multi-factors optimization on hydrogen/air combustion characteristics and thermal performance based on grey relational analysis," Energy, Elsevier, vol. 255(C).
    13. Luo, Bo & E, Jiaqiang & Chen, Jingwei & Zhang, Feng & Ding, Jiangjun, 2024. "Effect of NH3/H2/O2 premixed combustion on energy conversion enhancement and NOx emission reduction of the segmented nozzle micro-combustor in thermophotovoltaic system," Renewable Energy, Elsevier, vol. 228(C).
    14. Fontana, Éliton & Battiston, Lucas & Oliveira, Rosivaldo G.A. & Capeletto, Claudia A. & Luz, Luiz F.L., 2022. "Beyond the combustion chamber: Heat transfer and its impact on micro-thermophotovoltaic systems performance," Energy, Elsevier, vol. 239(PC).
    15. Li, Linhong & Yang, Guangyao & Fan, Aiwu, 2021. "Non-premixed combustion characteristics and thermal performance of a catalytic combustor for micro-thermophotovoltaic systems," Energy, Elsevier, vol. 214(C).
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    18. Tan, Yan & E, Jiaqiang & Chen, Jingwei & Liao, Gaoliang & Zhang, Feng & Li, Jintao, 2022. "Investigation on combustion characteristics and thermal performance of a three rearward-step structure micro combustor fueled by premixed hydrogen/air," Renewable Energy, Elsevier, vol. 186(C), pages 486-504.

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