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Predicting the Remaining Useful Life of Solid Oxide Fuel Cell Systems Using Adaptive Trend Models of Health Indicators

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  • Luka Žnidarič

    (Jožef Stefan Institute, Jamova Cesta 39, SI-1000 Ljubljana, Slovenia
    Jožef Stefan International Postgraduate School, Jamova Cesta 39, SI-1000 Ljubljana, Slovenia)

  • Žiga Gradišar

    (Jožef Stefan Institute, Jamova Cesta 39, SI-1000 Ljubljana, Slovenia
    Jožef Stefan International Postgraduate School, Jamova Cesta 39, SI-1000 Ljubljana, Slovenia)

  • Đani Juričić

    (Jožef Stefan Institute, Jamova Cesta 39, SI-1000 Ljubljana, Slovenia)

Abstract

Degradation is an inevitable companion in the operation of solid oxide fuel cell (SOFC) systems since it directly deteriorates the reliability of the system’s operation and the system’s durability. Both are seen as barriers that limit the extensive commercial use of SOFC systems. Therefore, diagnosis and prognosis are valuable tools that can contribute to raising the reliability of the system operation, efficient health management, increased durability and implementation of predictive maintenance techniques. Remaining useful life (RUL) prediction has been extensively studied in many areas like batteries and proton-exchange membrane fuel cell (PEM) systems, and a range of different approaches has been proposed. On the other hand, results available in the domain of SOFC systems are still relatively limited. Moreover, methods relying on detailed process models and models of degradation turned out to have limited applicability for in-field applications. Therefore, in this paper, we propose an effective, data-driven approach to predicting RUL where the trend of the health index is modeled by an adaptive linear model, which is updated at all times during the system operation. This allows for a closed-form solution of the probability distribution of the RUL, which is the main novelty of this paper. Such a solution requires no computational load and is as such very convenient for the application in ordinary low-cost control systems. The performance of the approach is demonstrated first on the simulated case studies and then on the data obtained from a long-term experiment on a laboratory SOFC system. From the tests conducted so far, it turns out that the quality of the RUL prediction is usually rather low at the beginning of the system operation, but then gradually improves while the system is approaching the end-of-life (EOL), making it a viable tool for prognosis.

Suggested Citation

  • Luka Žnidarič & Žiga Gradišar & Đani Juričić, 2024. "Predicting the Remaining Useful Life of Solid Oxide Fuel Cell Systems Using Adaptive Trend Models of Health Indicators," Energies, MDPI, vol. 17(11), pages 1-20, June.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:11:p:2729-:d:1408288
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    References listed on IDEAS

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    1. Lixiang Cui & Haibo Huo & Genhui Xie & Jingxiang Xu & Xinghong Kuang & Zhaopeng Dong, 2022. "Long-Term Degradation Trend Prediction and Remaining Useful Life Estimation for Solid Oxide Fuel Cells," Sustainability, MDPI, vol. 14(15), pages 1-12, July.
    2. Guida, Maurizio & Postiglione, Fabio & Pulcini, Gianpaolo, 2015. "A random-effects model for long-term degradation analysis of solid oxide fuel cells," Reliability Engineering and System Safety, Elsevier, vol. 140(C), pages 88-98.
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