James W Harper

US Patent:

20170058769, Mar 2, 2017

Filed:

Aug 16, 2016

Appl. No.:

15/237676

Inventors:

- Schenectady NY, US
Michael Anthony Cocca - Atlanta GA, US
James Harper - Greenville SC, US

International Classification:

F02C 3/30

Abstract:

A system for operating a combustor in a non-Premix mode of operation includes a combustor comprising a plurality of primary fuel nozzles annularly arranged around a center fuel nozzle, a fuel supply system that is fluidly coupled to the plurality of primary fuel nozzles and the center fuel nozzle, a steam injection system that is fluidly coupled to the fuel supply system and to at least one of the plurality of primary fuel nozzles or the center fuel nozzle and a controller. The controller is electronically coupled to the fuel supply system and the steam injection system. The controller is programmed to initiate the steam injection system to inject a flow of superheated steam into a flow of fuel from the fuel supply system upstream from at least one of the plurality of primary fuel nozzles or the center fuel nozzle during a non-Premix mode of operation of the combustor.

US Patent:

20170058770, Mar 2, 2017

Filed:

Aug 16, 2016

Appl. No.:

15/237694

Inventors:

- Schenectady NY, US
Michael Anthony Cocca - Atlanta GA, US
Joseph Phillip Klosinski - Atlanta GA, US
James Harper - Greenville SC, US

International Classification:

F02C 6/18
F01N 5/02
H02K 7/18
F02C 3/13
F02C 3/34
F01N 3/10
F01K 11/02

Abstract:

A system for decoupling steam production dependency from gas turbine load includes a gas turbine having an inlet system, a compressor, a combustor and a turbine. The combustor includes a plurality of axially staged fuel injectors positioned downstream from a plurality of primary fuel nozzles and a center fuel nozzle. The gas turbine further includes at least one bleed air extraction port that is in fluid communication with at least one of the compressor, a compressor discharge casing or the combustor. The system also includes a diluent injection system that is in fluid communication with the combustor and an exhaust section that is disposed downstream from the turbine. The exhaust section includes an oxidation catalyst system and a heat recovery steam generator.

US Patent:

20170058784, Mar 2, 2017

Filed:

Aug 16, 2016

Appl. No.:

15/237726

Inventors:

- Schenectady NY, US
Michael Anthony Cocca - Atlanta GA, US
Joseph Phillip Klosinski - Atlanta GA, US
Mihir Kumar Lal - Greer SC, US
James Harper - Greenville SC, US

International Classification:

F02C 9/18
F02C 7/228
F23R 3/34
F01D 25/30
F01N 3/10
F04D 29/32
F04D 29/54
F01D 5/02
F02C 3/04
F02C 3/30

Abstract:

A system and related method for maintaining emissions compliance while operating a gas turbine in turndown mode are disclosed herein. The system includes a gas turbine including a compressor, a combustor, a turbine and an exhaust section. The combustor comprises a plurality of axially staged fuel injectors positioned downstream from a plurality of primary fuel nozzles and a center fuel nozzle. The gas turbine further comprises a bleed air extraction port that is in fluid communication with at least one of the compressor, a compressor discharge casing or the combustor. The system further includes a controller programmed to bleed compressed air from the bleed air extraction port and to energize the plurality of axially staged fuel injectors during turndown operation of the gas turbine.