FIELD: heat-power engineering. SUBSTANCE: device has gas-turbine engine 1 with free gas turbine 2 which is connected by its shaft with drive rotary member 6 and shaft of steam turbine 3; plant is also provided with steam generator 5 connected to exhaust of gas turbine 2 by heating medium. Mounted at inlet of steam generator 5 is closed gas-filled reservoir 8 made in form of hollow rotor with shaft 9. Reservoir 8 is filled with heavy inert gas or mixture of several gases at excessive pressure. Shaft 9 of reservoir 8 is connected to shaft of turbine 2 through angular velocity step-up gear. Reservoir 8 is provided with streamlined tight casing with off-center hollow partition and one-sided blades located on side of gas flow inlet. Steam generator is mounted coaxially relative to rotor of reservoir 8 and is provided with heat-insulated axial zone where shaft 9 of rotor and rotational supports are located. EFFECT: enhanced reliability. 2 dwg
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