System having axial-radial exhaust diffuser and method of use
AssigneeGeneral Electric Company
InventorsFelix Abraham Madukkakuzhy, Joshy John, Bala Muralidhar Singh Bahadur, Sanjeev Kumar Jain
Life of this patent
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Abstract
A system includes an exhaust diffuser system having an axial-radial diffuser and a transition duct. The axial-radial diffuser includes an inlet, an outlet, an axial diffuser portion between the inlet and the outlet, and a radial diffuser portion between the axial diffuser portion and the outlet, wherein the inlet is configured to couple to a gas turbine system. The transition duct is coupled to the axial-radial diffuser, wherein the outlet is disposed inside of an intake portion of the transition duct, and the transition duct includes a discharge portion configured to couple to a heat recovery steam generator (HRSG).
Claims24
A system, comprising:
- an exhaust diffuser system, comprising:
- an axial-radial diffuser comprising an inlet, an outlet, an axial diffuser portion between the inlet and the outlet, and a radial diffuser portion between the axial diffuser portion and the outlet, wherein the radial diffuser portion increases in cross-sectional area in a flow direction toward the outlet, and the inlet is configured to couple to a gas turbine system;
- and
- a transition duct coupled to the axial-radial diffuser, wherein the outlet is disposed inside of an intake portion of the transition duct, and the transition duct comprises a discharge portion configured to couple to a heat recovery steam generator (HRSG).
A method, comprising:
- diffusing an exhaust gas from a gas turbine system through an axial-radial diffuser of an exhaust diffuser system, wherein the axial-radial diffuser comprises an inlet, an outlet, an axial diffuser portion between the inlet and the outlet, and a radial diffuser portion between the axial diffuser portion and the outlet, wherein the radial diffuser portion increases in cross-sectional area in a flow direction toward the outlet, and the inlet is coupled to the gas turbine system;
- and
- transitioning the exhaust gas from the radial diffuser portion to a heat recovery steam generator (HRSG) through a transition duct of the exhaust diffuser system, wherein the transition duct is coupled to the axial-radial diffuser, the outlet is disposed inside of an intake portion of the transition duct, and the transition duct comprises a discharge portion coupled to the HRSG.
A system, comprising:
- an exhaust diffuser system configured to mount between a gas turbine system and a heat recovery steam generator (HRSG), wherein the exhaust diffuser system comprises:
- a radial diffuser portion comprising a central hub having an inner wall disposed about a central axis, an outer wall disposed about the inner wall, and an exhaust passage between the inner and outer walls, wherein the exhaust passage of the radial diffuser portion increases in cross-sectional area in a flow direction toward an outlet;
- and
- a flow passage area adjustment system having a drive coupled to the central hub of the radial diffuser portion;
- and
- a controller coupled to the drive, wherein the controller is configured to control the drive to move the central hub of the radial diffuser portion to adjust a flow through the radial diffuser portion.
Dependencies are inferred from the claim text.