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Control System Based on Anode Offgas Recycle for Solid Oxide Fuel Cell System

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  • Shuanghong Li
  • Chengjun Zhan
  • Yupu Yang

Abstract

The conflicting operation objectives between rapid load following and the fuel depletion avoidance as well as the strong interactions between the thermal and electrical parameters make the SOFC system difficult to control. This study focuses on the design of the decoupling control for the thermal and electrical characteristics of the SOFC system through anode offgas recycling (AOR). The decoupling control system can independently manipulate the thermal and electrical parameters, which interact with one another in most cases, such as stack temperatures, burner temperature, system current, and system power. Under the decoupling control scheme, the AOR is taken as a manipulation variable. The burner controller maintains the burner temperature without being affected by abrupt power change. The stack temperature controller properly coordinates with the burner temperature controller to independently modulate the stack thermal parameters. For the electrical problems, the decoupling control scheme shows its superiority over the conventional controller in alleviating rapid load following and fuel depletion avoidance. System-level simulation under a power-changing case is performed to validate the control freedom between the thermal and electrical characteristics as well as the stability, efficiency, and robustness of the novel system control scheme.

Suggested Citation

  • Shuanghong Li & Chengjun Zhan & Yupu Yang, 2018. "Control System Based on Anode Offgas Recycle for Solid Oxide Fuel Cell System," Mathematical Problems in Engineering, Hindawi, vol. 2018, pages 1-16, March.
  • Handle: RePEc:hin:jnlmpe:4198954
    DOI: 10.1155/2018/4198954
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    Cited by:

    1. Eun-Jung Choi & Sangseok Yu & Sang-Min Lee, 2022. "Optimization of Operating Conditions of a Solid Oxide Fuel Cell System with Anode Off-Gas Recirculation Using the Model-Based Sensitivity Analysis," Energies, MDPI, vol. 15(2), pages 1-13, January.
    2. Chen, Jinwei & Hu, Zhenchao & Lu, Jinzhi & Zhang, Huisheng & Weng, Shilie, 2022. "A novel control strategy with an anode variable geometry ejector for a SOFC-GT hybrid system," Energy, Elsevier, vol. 261(PA).

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