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System simulation and exergetic analysis of solid oxide fuel cell power generation system with cascade configuration

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  • Koo, Taehyung
  • Kim, Young Sang
  • Lee, Dongkeun
  • Yu, Sangseok
  • Lee, Young Duk

Abstract

A solid oxide fuel cell (SOFC) based power generation system with cascade configuration has been analyzed using the exergy-based analysis method. A cascade system has double SOFC stacks, where the unreacted fuel released from the primary SOFC stack is re-utilized in the secondary stack, generating additional power and maximizing fuel-use in the system. For comparison and evaluation, a simple SOFC system and an SOFC system with anode off-gas recirculation are also analyzed. In all the SOFC systems, efficiency increases with increasing fuel utilization. The simple and anode off-gas recirculation systems show 63.7% and 66.0% electrical efficiency at 85% and 90% fuel utilization, respectively. The cascade system shows 66.47% electrical efficiency at 90% fuel utilization, which is the highest electrical efficiency among the systems analyzed. Through the exergy analysis, the magnitude, location, and resources of the thermodynamic irreversibility within the SOFC systems are clearly identified, giving the quantified information why the cascade configuration has higher efficiency than the other configurations. The SOFC stack shows very high exergetic efficiency over 90%. In the cascade configuration, the released exergy from the primary SOFC stack can be exergetically-efficiently utilized in the secondary SOFC stack, contributing to a higher efficiency.

Suggested Citation

  • Koo, Taehyung & Kim, Young Sang & Lee, Dongkeun & Yu, Sangseok & Lee, Young Duk, 2021. "System simulation and exergetic analysis of solid oxide fuel cell power generation system with cascade configuration," Energy, Elsevier, vol. 214(C).
    • Handle: RePEc:eee:energy:v:214:y:2021:i:c:s0360544220321940
    DOI: 10.1016/j.energy.2020.119087
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    Cited by:

    1. Eun-Jung Choi & Sangseok Yu & Ji-Min Kim & Sang-Min Lee, 2021. "Model-Based System Performance Analysis of a Solid Oxide Fuel Cell System with Anode Off-Gas Recirculation," Energies, MDPI, vol. 14(12), pages 1-22, June.
    2. Wang, Heng & Zhao, Hongbin & Du, Huicheng & Zhao, Zefeng & Zhang, Taiheng, 2022. "Thermodynamic performance study of a new diesel-fueled CLHG/SOFC/STIG cogeneration system with CO2 recovery," Energy, Elsevier, vol. 246(C).
    3. Jin, Xinfang & Ku, Anthony & Ohara, Brandon & Huang, Kevin & Singh, Surinder, 2021. "Performance analysis of a 550MWe solid oxide fuel cell and air turbine hybrid system powered by coal-derived syngas," Energy, Elsevier, vol. 222(C).
    4. Fathy, Ahmed & Rezk, Hegazy, 2022. "Political optimizer based approach for estimating SOFC optimal parameters for static and dynamic models," Energy, Elsevier, vol. 238(PC).
    5. Pongratz, Gernot & Subotić, Vanja & Hochenauer, Christoph & Scharler, Robert & Anca-Couce, Andrés, 2022. "Solid oxide fuel cell operation with biomass gasification product gases: Performance- and carbon deposition risk evaluation via a CFD modelling approach," Energy, Elsevier, vol. 244(PB).
    6. Mohammad shafie, Mohammad & Ali rajabipour, & Mehrpooya, Mehdi, 2022. "Investigation of an electrochemical conversion of carbon dioxide to ethanol and solid oxide fuel cell, gas turbine hybrid process," Renewable Energy, Elsevier, vol. 184(C), pages 1112-1129.
    7. Wang, Jiangjiang & Cui, Zhiheng & Yao, Wenqi & Huo, Shuojie, 2023. "Regulation strategies and thermodynamic analysis of combined cooling, heating, and power system integrated with biomass gasification and solid oxide fuel cell," Energy, Elsevier, vol. 266(C).

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