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Numerical analyses of three-dimensional fixed reaction bed for thermochemical energy storage

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  • Ranjha, Qasim
  • Oztekin, Alparslan

Abstract

Numerical analyses are performed to study thermo-chemical energy storage in a three-dimensional reaction bed. This study is aimed at investigating heat and mass transfer characteristics of a rectangular shaped fixed reaction bed packed with Ca(OH)2/CaO powders. A reversible reaction with endothermic decomposition of Ca(OH)2 and exothermic hydration of CaO is used to achieve charging and discharging of the module respectively. Heat is transferred indirectly to and from the bed through side walls using a flat plate heat exchanger. A set of coupled nonlinear equations governing reaction kinetics, heat and mass transports is solved numerically using a finite element based software. Mathematical models and the numerical method employed are validated by comparing present simulation results against experimental results. Our results agree reasonably well with results of experimental measurements. It is noted that the heat and mass transport within the reaction bed is strongly three-dimensional in case of low bed porosity. The results of this study provide detailed insight to the heat storage and heat release processes occurring in fixed bed of fine Ca(OH)2/CaO particles. The study helps designing and optimizing high temperature thermo-chemical energy storage modules for power generation applications.

Suggested Citation

  • Ranjha, Qasim & Oztekin, Alparslan, 2017. "Numerical analyses of three-dimensional fixed reaction bed for thermochemical energy storage," Renewable Energy, Elsevier, vol. 111(C), pages 825-835.
    • Handle: RePEc:eee:renene:v:111:y:2017:i:c:p:825-835
    DOI: 10.1016/j.renene.2017.04.062
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    Cited by:

    1. Mukherjee, Ankit & Pujari, Ankush Shankar & Shinde, Shraddha Nitin & Kashyap, Uddip & Kumar, Lalit & Subramaniam, Chandramouli & Saha, Sandip K., 2022. "Performance assessment of open thermochemical energy storage system for seasonal space heating in highly humid environment," Renewable Energy, Elsevier, vol. 201(P1), pages 204-223.
    2. Jun Yan & Lei Jiang & Changying Zhao, 2023. "Numerical Simulation of the Ca(OH) 2 /CaO Thermochemical Heat Storage Process in an Internal Heating Fixed-Bed Reactor," Sustainability, MDPI, vol. 15(9), pages 1-14, April.
    3. Ye, H. & Tao, Y.B. & Wu, Z.H., 2022. "Performance improvement of packed bed thermochemical heat storage by enhancing heat transfer and vapor transmission," Applied Energy, Elsevier, vol. 326(C).
    4. Risthaus, Kai & Bürger, Inga & Linder, Marc & Schmidt, Matthias, 2020. "Numerical analysis of the hydration of calcium oxide in a fixed bed reactor based on lab-scale experiments," Applied Energy, Elsevier, vol. 261(C).
    5. Wang, Wei & Shuai, Yong & Yang, Jiangyu & Lougou, Bachirou Guene & Huang, Yudong, 2023. "Heat transfer and heat storage characteristics of calcium hydroxide/oxide based on shell-tube thermochemical energy storage device," Renewable Energy, Elsevier, vol. 218(C).
    6. Mikos-Nuszkiewicz, Natalia & Furmański, Piotr & Łapka, Piotr, 2023. "A mathematical model of charging and discharging processes in a thermochemical energy storage reactor using the hydrated potassium carbonate as a thermochemical material," Energy, Elsevier, vol. 263(PA).
    7. Wang, Mengyi & Chen, Li & He, Pu & Tao, Wen-Quan, 2019. "Numerical study and enhancement of Ca(OH)2/CaO dehydration process with porous channels embedded in reactors," Energy, Elsevier, vol. 181(C), pages 417-428.
    8. Wang, Mengyi & Chen, Li & Zhou, Yuhao & Tao, Wen-Quan, 2022. "Numerical simulation of the calcium hydroxide/calcium oxide system dehydration reaction in a shell-tube reactor," Applied Energy, Elsevier, vol. 312(C).
    9. Funayama, Shigehiko & Takasu, Hiroki & Kim, Seon Tae & Kato, Yukitaka, 2020. "Thermochemical storage performance of a packed bed of calcium hydroxide composite with a silicon-based ceramic honeycomb support," Energy, Elsevier, vol. 201(C).
    10. 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).
    11. Peng, Xinyue & Yao, Min & Root, Thatcher W. & Maravelias, Christos T., 2020. "Design and analysis of concentrating solar power plants with fixed-bed reactors for thermochemical energy storage," Applied Energy, Elsevier, vol. 262(C).

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