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Power and hydrogen production from ammonia in a micro-thermophotovoltaic device integrated with a micro-reformer

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  • Um, Dong Hyun
  • Kim, Tae Young
  • Kwon, Oh Chae

Abstract

Power and hydrogen (H2) production by burning and reforming ammonia (NH3) in a micro-TPV (microscale-thermophotovoltaic) device integrated with a micro-reformer is studied experimentally. A heat-recirculating micro-emitter with the cyclone and helical adapters that enhance the residence time of fed fuel-air mixtures and uniform burning burns H2-added NH3-air mixtures. A micro-reformer that converts NH3 to H2 using ruthenium as a catalyst surrounds the micro-emitter as a heat source. The micro-reformer is surrounded by a chamber, the inner and outer walls of which have installations of gallium antimonide photovoltaic cells and cooling fins. For the micro-reformer-integrated micro-TPV device the maximum overall efficiency of 8.1% with electrical power of 4.5 W and the maximum NH3 conversion rate of 96.0% with the H2 production rate of 22.6 W (based on lower heating value) are obtained, indicating that the overall efficiency is remarkably enhanced compared with 2.0% when the micro-TPV device operates alone. This supports the potential of improving the overall efficiency of a micro-TPV device through integrating it with a micro-reformer. Also, the feasibility of using NH3 as a carbon-free fuel for both burning and reforming in practical micro power and H2 generation devices has been demonstrated.

Suggested Citation

  • Um, Dong Hyun & Kim, Tae Young & Kwon, Oh Chae, 2014. "Power and hydrogen production from ammonia in a micro-thermophotovoltaic device integrated with a micro-reformer," Energy, Elsevier, vol. 73(C), pages 531-542.
    • Handle: RePEc:eee:energy:v:73:y:2014:i:c:p:531-542
    DOI: 10.1016/j.energy.2014.06.053
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    References listed on IDEAS

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    1. Li, Yueh-Heng & Chen, Guan-Bang & Cheng, Tsarng-Sheng & Yeh, Yean-Ling & Chao, Yei-Chin, 2013. "Combustion characteristics of a small-scale combustor with a percolated platinum emitter tube for thermophotovoltaics," Energy, Elsevier, vol. 61(C), pages 150-157.
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    Cited by:

    1. Li, Jun & Huang, Hongyu & Kobayashi, Noriyuki & He, Zhaohong & Osaka, Yugo & Zeng, Tao, 2015. "Numerical study on effect of oxygen content in combustion air on ammonia combustion," Energy, Elsevier, vol. 93(P2), pages 2053-2068.
    2. Wu, H. & Kaviany, M. & Kwon, O.C., 2018. "Thermophotovoltaic power conversion using a superadiabatic radiant burner," Applied Energy, Elsevier, vol. 209(C), pages 392-399.
    3. Selvan, Krishna Veni & Mohamed Ali, Mohamed Sultan, 2016. "Micro-scale energy harvesting devices: Review of methodological performances in the last decade," Renewable and Sustainable Energy Reviews, Elsevier, vol. 54(C), pages 1035-1047.
    4. Khan, Mohammed Asad & Gadgil, Hrishikesh & Kumar, Sudarshan, 2019. "Influence of liquid properties on atomization characteristics of flow-blurring injector at ultra-low flow rates," Energy, Elsevier, vol. 171(C), pages 1-13.
    5. Li, Jun & Huang, Hongyu & Kobayashi, Noriyuki & Wang, Chenguang & Yuan, Haoran, 2017. "Numerical study on laminar burning velocity and ignition delay time of ammonia flame with hydrogen addition," Energy, Elsevier, vol. 126(C), pages 796-809.
    6. E, Jiaqiang & Luo, Bo & Han, Dandan & Chen, Jingwei & Liao, Gaoliang & Zhang, Feng & Ding, Jiangjun, 2022. "A comprehensive review on performance improvement of micro energy mechanical system: Heat transfer, micro combustion and energy conversion," Energy, Elsevier, vol. 239(PE).

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