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TopCycle: A Novel High Performance and Fuel Flexible Gas Turbine Cycle

Author

Listed:
  • Simeon Dybe

    (Fluid Dynamics, Technische Universität Berlin, 10623 Berlin, Germany)

  • Michael Bartlett

    (Phoenix BioPower AB, Drottning Kristinas väg 18, 114 24 Stockholm, Sweden)

  • Jens Pålsson

    (Phoenix BioPower AB, Drottning Kristinas väg 18, 114 24 Stockholm, Sweden)

  • Panagiotis Stathopoulos

    (Unsteady Thermodynamics in Gas Turbine Processes, Technische Universität Berlin, 10623 Berlin, Germany)

Abstract

High pressure humidified cycles can combine high operational flexibility and high thermal efficiency. The current work introduces such a cycle, namely TopCycle, which provides the necessary combustion infrastructure to operate on a wide fuel variety in a steam-rich atmosphere. The cycle configuration is presented in detail, and its operation is exemplified on the basis of simulation results. Operation at design condition results in electric efficiencies higher than 50% (lower heating value (LHV)) and power densities higher than 2100 kW/kg a i r (referred to intake air flow). A sensitivity analysis identifies the cycle performance as a function of representative parameters, which provide the basis for future operation and design improvements. As for any gas turbine cycle, TopCycle’s electric efficiency can be effectively improved by increasing the turbine inlet temperature, optimizing the economizer heat recovery, as well as elevating the working pressure. Finally, TopCycle’s performance is compared to a state-of-the-art combined cycle (CC) at equivalent operation parameters. The TopCycle operates at an elevated electric efficiency and considerably higher power density, which can be transferred into smaller plant footprint and dimensions and thus lower investment costs at equal power output in comparison to a CC.

Suggested Citation

  • Simeon Dybe & Michael Bartlett & Jens Pålsson & Panagiotis Stathopoulos, 2021. "TopCycle: A Novel High Performance and Fuel Flexible Gas Turbine Cycle," Sustainability, MDPI, vol. 13(2), pages 1-18, January.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:2:p:651-:d:478765
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    References listed on IDEAS

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    1. Stathopoulos, P. & Paschereit, C.O., 2015. "Retrofitting micro gas turbines for wet operation. A way to increase operational flexibility in distributed CHP plants," Applied Energy, Elsevier, vol. 154(C), pages 438-446.
    2. Panagiotis Stathopoulos, 2018. "Comprehensive Thermodynamic Analysis of the Humphrey Cycle for Gas Turbines with Pressure Gain Combustion," Energies, MDPI, vol. 11(12), pages 1-21, December.
    3. Werner, Sven, 2017. "District heating and cooling in Sweden," Energy, Elsevier, vol. 126(C), pages 419-429.
    4. Jonsson, Maria & Yan, Jinyue, 2005. "Humidified gas turbines—a review of proposed and implemented cycles," Energy, Elsevier, vol. 30(7), pages 1013-1078.
    5. Montero Carrero, Marina & De Paepe, Ward & Bram, Svend & Musin, Frédéric & Parente, Alessandro & Contino, Francesco, 2016. "Humidified micro gas turbines for domestic users: An economic and primary energy savings analysis," Energy, Elsevier, vol. 117(P2), pages 429-438.
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