Systems and methods for de-icing a gas turbine engine inlet screen and dehumidifying inlet air filters

摘要

A system for de-icing a gas turbine engine is provided. A manifold is coupled to an inlet screen. A first conduit is coupled to a stage of the compressor and a first input of a mixing component. A second conduit is coupled to the exhaust and a second input of the mixing component. The second conduit being adapted to extract exhaust gases without increasing the pressure at the exhaust. A third conduit is coupled to the output of the mixing component and the manifold. A method for de-icing a gas turbine engine inlet screen includes determining a current temperature at the inlet screen, and determining a desired temperature at the inlet screen. If the current temperature at the inlet screen is less than the desired temperature at the inlet screen first flow rate of an air-exhaust mixture necessary to achieve the desired inlet screen temperature is calculated. The method also includes extracting an amount of exhaust gas from a turbine exhaust subsystem without increasing a pressure at the turbine exhaust subsystem, extracting an amount of air from a compressor stage, and mixing the amount of exhaust gas with the amount of air to generate an air-exhaust mixture that is conveyed to the inlet screen.

主权项

1. A system comprising:
a compressor; a turbine having an exhaust; an inlet screen; an anti-icing manifold coupled to the inlet screen; an eductor functioning as a mixing component having a first input, a second input and an output; a first conduit coupled to a stage of the compressor and the first input of the eductor; a second conduit coupled to the exhaust and the second input of the eductor, wherein the second conduit is adapted to extract exhaust gases through suction; and a third conduit coupled to the output of the eductor and the anti-icing manifold; further comprising a first control valve disposed on the first conduit; and a first block valve disposed on the second conduit, and further comprising a second control valve disposed on the third conduit, wherein a single controller provides signals controlling positions of the first control valve, the first block valve, and the second control valve.