Closed-cycle gas turbine
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For turbines powered by the internal combustion of fuel, see Gas turbine.
Not to be confused with Combined-cycle gas turbine.
A closed-cycle gas turbine is a turbine that uses a gas (e.g. air, nitrogen, helium, argon,[1][2] etc.) for the working fluid as part of a closed thermodynamic system. Heat is supplied from an external source.[3] Such recirculating turbines follow the Brayton cycle.[4][5]