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Parametric analysis of the efficiency of the combined gas-steam turbine unit of a hybrid cycle for the FPSO vessel


A thermal diagram of the combined gas‒steam turbine unit of a hybrid cycle, which is an energy complex consisting of a base gas turbine engine with a steam turbine heat recovery circuit and a steam-injected gas turbine operating with overexpansion, is proposed. A mathematical model of a power plant has been developed, taking into consideration the features of thermodynamic processes of simple, binary, and steam-injected gas‒steam cycles. Thermodynamic investigations and optimization of the parameters of a combined installation of a hybrid cycle for the generation of electrical energy have been carried out. Three-dimensional calculations of the combustion chamber of a steam-injected gas turbine were carried out, which confirmed the low emissions of the main toxic components.


Combined-cycle, Gas turbine, Steam turbine, Power plant


Vol. 28 No. 4(112) (2021)
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  • Serhiy Serbin

    Admiral Makarov National University of Shipbuilding
  • Nikolay Washchilenko

    Admiral Makarov National University of Shipbuilding
  • Marek Dzida

    Gdańsk University of Technology
  • Jerzy Kowalski

    Gdańsk University of Technology

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