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Numerical and Experimental Study of a Jet-and-Recirculation Stabilized Low Calorific Combustor for a Hybrid Power Plant

Author

Listed:
  • Felix Grimm

    (German Aerospace Center (DLR), Pfaffenwaldring 38-40, 70569 Stuttgart, Germany)

  • Timo Lingstädt

    (German Aerospace Center (DLR), Pfaffenwaldring 38-40, 70569 Stuttgart, Germany)

  • Peter Kutne

    (German Aerospace Center (DLR), Pfaffenwaldring 38-40, 70569 Stuttgart, Germany)

  • Manfred Aigner

    (German Aerospace Center (DLR), Pfaffenwaldring 38-40, 70569 Stuttgart, Germany)

Abstract

An atmospheric prototype burner is studied with numerical and experimental tools. The burner system is designed for operation in a hybrid power plant for decentralized energy conversion. In order to realize such a coupled system, a reliable combustion system has to be established. Numerical and experimental findings in the presented study demonstrate the capabilities of the novel burner system in suitable operation conditions. In this system, a solid oxide fuel cell (SOFC) is mounted upstream of the burner in the gas turbine system. The combination of both realizes a large operational flexibility with comparably high overall efficiency. Since the combustor is operated with SOFC off-gas, several challenges arise. Low calorific combustion needs careful burner design and numerical modeling, since the heat-loss mechanisms occur to be in the order of magnitude of thermal power output. Thus, different modeling strategies are discussed in the paper. The numerical studies are compared with experimental results and high-quality simulation results complement limited measured findings with easy-to-use low fidelity RANS models. A priori measurements are employed for the selection of investigation points. It is shown that the presented combustor system is able to cover low-calorific combustion over a large range of operation conditions, despite major heat-loss effects, which are characterized by means of numerical CFD (Computational Fluid Dynamics) modeling.

Suggested Citation

  • Felix Grimm & Timo Lingstädt & Peter Kutne & Manfred Aigner, 2021. "Numerical and Experimental Study of a Jet-and-Recirculation Stabilized Low Calorific Combustor for a Hybrid Power Plant," Energies, MDPI, vol. 14(3), pages 1-19, January.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:3:p:537-:d:484398
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    References listed on IDEAS

    as
    1. Azizi, Mohammad Ali & Brouwer, Jacob, 2018. "Progress in solid oxide fuel cell-gas turbine hybrid power systems: System design and analysis, transient operation, controls and optimization," Applied Energy, Elsevier, vol. 215(C), pages 237-289.
    2. Zornek, T. & Monz, T. & Aigner, M., 2015. "Performance analysis of the micro gas turbine Turbec T100 with a new FLOX-combustion system for low calorific fuels," Applied Energy, Elsevier, vol. 159(C), pages 276-284.
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    Cited by:

    1. Mohsen Ayoobi & Pedro R. Resende & Alexandre M. Afonso, 2022. "Numerical Investigations of Combustion—An Overview," Energies, MDPI, vol. 15(9), pages 1-5, April.
    2. Felix Grimm, 2022. "Low-Order Reactor-Network-Based Prediction of Pollutant Emissions Applied to FLOX ® Combustion," Energies, MDPI, vol. 15(5), pages 1-16, February.

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