Steam Cooled Direct Fired Coal Gas Turbine

摘要

A gas turbine includes a combustor configured to burn a hydrocarbon fuel input and provide a combustion product hot gas output to a turbine inlet having a turbine inlet temperature exceeding about 2200° F., the hot gas output also includes ash in an amount of 0.1% or more by weight of the hydrocarbon fuel input. The turbine also includes a stationary nozzle configured to receive the hot gas output that includes a plurality of circumferentially spaced vanes and a vane cooling circuit located within vane sidewalls configured for circulation of steam as a coolant. The turbine also includes a rotatable rotor configured to receive the hot gas output exiting the nozzle that includes a plurality of buckets and a bucket cooling circuit located within the bucket sidewalls and shank that is configured for circulation of steam as a coolant for the bucket.