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Thermochemical reduction modeling in a high-temperature moving-bed reactor for energy storage: 1D model

Author

Listed:
  • Huang, Wei
  • Korba, David
  • Randhir, Kelvin
  • Petrasch, Joerg
  • Klausner, James
  • AuYeung, Nick
  • Li, Like

Abstract

The design of robust and efficient high-temperature thermochemical reactors and determination of operating conditions are critical steps toward enabling high-efficiency long-duration solar energy storage. This work presents a computational model for the thermal reduction of a metal oxide material (Mg-Mn-O) up to 1450 °C and the coupled complex transport phenomena in a novel tubular thermal reactor design that features the capability for a high extent-of-reduction (high energy storage density) and inherent heat recuperation. A one-dimensional model coupling counter-current gas–solid flow, two-phase heat transfer, thermochemical redox reactions, and species transport in a moving-bed reactor is developed. Simplified versions of the model are validated with published results in the literature for packed beds with both inert and reactive particles; the fully coupled model is also validated with experimental measurements of a moving-bed reactor in terms of local temperatures and oxygen release at the exit. Detailed comparisons on the effects of different boundary conditions in the reaction zone (prescribed wall temperature vs. heat flux conditions) and formulations based on a simple uniform flow assumption vs. plug flow using Ergun equation for gas flow are investigated. The results are compared with experimental measurements, and for all cases, the energy flow components in the reactor system and the thermal to chemical conversion efficiency and overall system efficiency are computed. The predicted high thermal-to-chemical efficiency ∼95% and system efficiency ∼30% agree with experimental measurements.

Suggested Citation

  • Huang, Wei & Korba, David & Randhir, Kelvin & Petrasch, Joerg & Klausner, James & AuYeung, Nick & Li, Like, 2022. "Thermochemical reduction modeling in a high-temperature moving-bed reactor for energy storage: 1D model," Applied Energy, Elsevier, vol. 306(PB).
    • Handle: RePEc:eee:appene:v:306:y:2022:i:pb:s0306261921013106
    DOI: 10.1016/j.apenergy.2021.118009
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    References listed on IDEAS

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    1. Nicole Carina Preisner & Inga Bürger & Michael Wokon & Marc Linder, 2020. "Numerical Investigations of a Counter-Current Moving Bed Reactor for Thermochemical Energy Storage at High Temperatures," Energies, MDPI, vol. 13(3), pages 1-22, February.
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    Cited by:

    1. Luo, Ji-Wang & Chen, Li & Wang, MengYi & Xia, Yang & Tao, WenQuan, 2022. "Particle-scale study of coupled physicochemical processes in Ca(OH)2 dehydration using the lattice Boltzmann method," Energy, Elsevier, vol. 250(C).
    2. Gan, Di & Zhu, Peiwang & Xu, Haoran & Xie, Xiangyu & Chai, Fengyuan & Gong, Jueyuan & Li, Jiasong & Xiao, Gang, 2023. "Experimental and simulation study of Mn–Fe particles in a controllable-flow particle solar receiver for high-temperature thermochemical energy storage," Energy, Elsevier, vol. 282(C).
    3. Korba, David & Huang, Wei & Randhir, Kelvin & Petrasch, Joerg & Klausner, James & AuYeung, Nick & Li, Like, 2022. "A continuum model for heat and mass transfer in moving-bed reactors for thermochemical energy storage," Applied Energy, Elsevier, vol. 313(C).

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