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Predicting the performance of a micro gas turbine under solar-hybrid operation

Author

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  • Ssebabi, Brian
  • Dinter, Frank
  • van der Spuy, Johan
  • Schatz, Markus

Abstract

There are currently no commercial solar-hybrid gas turbine systems readily available off-the-shelf. Several operation and control challenges still exist, and significant development effort is still required to provide technically proven units. To address this gap, this study modeled the performance of a solar-hybrid micro gas turbine (MGT) system, considering both steady-state and transient operation. Based on the component matching, the equilibrium running point shifted on the compressor characteristic, to counter the additional system pressure losses, and ensure a useful work output, albeit with a reduced surge margin. Solar-hybrid operation was only possible for solar share of at least 20%, while the work output and cycle thermal efficiency drop below standard operation levels beyond certain solar share. In contrast to standard operation, a higher nominal work output of 20 kW, at a lower SFC of 0.0004 kg/kWh and a higher cycle thermal efficiency of 8% was predicted, the latter potentially increasing to 20% with recuperation. Solar-hybrid equilibrium running could eliminate the risk of running into compressor surge. The findings from this study should guide operation and control strategies for the proposed, and future solar-hybrid MGT systems, which should in turn contribute to their development and commercialization.

Suggested Citation

  • Ssebabi, Brian & Dinter, Frank & van der Spuy, Johan & Schatz, Markus, 2019. "Predicting the performance of a micro gas turbine under solar-hybrid operation," Energy, Elsevier, vol. 177(C), pages 121-135.
    • Handle: RePEc:eee:energy:v:177:y:2019:i:c:p:121-135
    DOI: 10.1016/j.energy.2019.04.064
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    Citations

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    Cited by:

    1. Roberta De Robbio, 2023. "Micro Gas Turbine Role in Distributed Generation with Renewable Energy Sources," Energies, MDPI, vol. 16(2), pages 1-37, January.
    2. Ghavami, Mohsen & Al-Zaili, Jafar & Sayma, Abdulnaser I., 2022. "A methodology for techno-economic and operation strategy optimisation of micro gas turbine-based solar powered dish-engine systems," Energy, Elsevier, vol. 251(C).
    3. Cao, Yan & Habibi, Hamed & Zoghi, Mohammad & Raise, Amir, 2021. "Waste heat recovery of a combined regenerative gas turbine - recompression supercritical CO2 Brayton cycle driven by a hybrid solar-biomass heat source for multi-generation purpose: 4E analysis and pa," Energy, Elsevier, vol. 236(C).
    4. Hachem, Joe & Schuhler, Thierry & Orhon, Dominique & Cuif-Sjostrand, Marianne & Zoughaib, Assaad & Molière, Michel, 2022. "Exhaust gas recirculation applied to single-shaft gas turbines: An energy and exergy approach," Energy, Elsevier, vol. 238(PB).
    5. Rovense, Francesco & Sebastián, Andrés & Abbas, Rubén & Romero, Manuel & González-Aguilar, José, 2023. "Performance map analysis of a solar-driven and fully unfired closed-cycle micro gas turbine," Energy, Elsevier, vol. 263(PB).
    6. Judit García-Ferrero & Irene Heras & María Jesús Santos & Rosa Pilar Merchán & Alejandro Medina & Antonio González & Antonio Calvo Hernández, 2020. "Thermodynamic and Cost Analysis of a Solar Dish Power Plant in Spain Hybridized with a Micro-Gas Turbine," Energies, MDPI, vol. 13(19), pages 1-24, October.

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