Disclosed herein is a fuel for use in a combustor of a gas turbine, wherein the fuel is a gas mixture that comprises hydrogen and exhaust gas from a total combustor.

A floating collar assembly is configured to receive a fuel nozzle or an igniter projecting through an opening defined in a combustor shell lined with heat shields having studs projecting through the combustor shell for engagement with corresponding fasteners outside the combustor shell. A floating collar is mounted outside the combustor shell with an opening in alignment with the opening in the combustor shell for receiving the fuel nozzle or the igniter. An external retaining bracket is mounted to the heat shield studs or other studs projecting outwardly from the combustor shell so as to trap the floating collar between the combustor shell and the bracket.

A combustor (3) includes: a fuel nozzle configured to inject fuel; a tubular body (24) having a tubular shape in which a combustion region through which combustion gas flows is formed inside, and in which a plurality of slits (50) are formed extending in the circumferential direction at intervals in the circumferential direction; and throttle pieces (60) which are fitted into the slits (50), project radially inward from the inner circumferential side of the tubular body (24), and have a throttle face that extends along the flow direction of the combustion gas as it extends from the radially outer side inward.

Modifying existing commercial jet engine technology to leverage the temperature and pressure available in the combustion of kerosene A-1 jet fuel (or other fuels) to include the Haber process (or other industrial processes requiring high temperatures and high pressures) presents possibilities for the creation of ammonia and other down-stream compounds suitable for atmospheric seeding of reflective or absorptive compounds. Compounds such as ammonia and urea (or other compoundsas time goes on) provide alternatives to high-altitude (20 km) seeding of sulfur dioxide (which is destructive to atmosphere, vegetation, and ozone alike). Additionally, the changes required to existing engine technology analogous to adding a catalytic converter to the exhaust system of a car, provide, through the leveraging of the strong chemical bond of atmospheric nitrogen (N2), additional overall energy output to the engine system (through heat) and the production of a potentially combustible liquid or gas (ammonia and down-stream ammonia compounds or other compounds) which could be used as a downstream fuel source by the engine itself.

Modifying existing commercial jet engine technology to leverage the temperature and pressure available in the combustion of kerosene A-1 jet fuel (or other fuels) to include the Haber process (or other industrial processes requiring high temperatures and high pressures) presents possibilities for the creation of ammonia and other down-stream compounds suitable for atmospheric seeding of reflective or absorptive compounds to reduce global temperatures. Compounds such as ammonia (to start) and urea (or other compoundsas time goes on) provide alternatives to Smith and Wegner's proposal of high-altitude (20 km) seeding of sulfur dioxide (which is destructive to atmosphere, vegetation, and ozone alike).

Additionally, the relatively small changes required to existing engine technology analogous to adding a catalytic converter to the exhaust system of a car, provide, through the leveraging of the strong chemical bond of atmospheric nitrogen (N.sub.2), additional overall energy output to the engine system (through heat) and the production of a potentially combustible liquid or gas (ammonia and down-stream ammonia compounds or other compounds) which could be used as a downstream fuel source by the engine itself.

The latter use is the most commercially viable and is likely to be the most frequent use of this invention.

A floating collar assembly is configured to receive a fuel nozzle or an igniter projecting through an opening defined in a combustor shell lined with heat shields having studs projecting through the combustor shell for engagement with corresponding fasteners outside the combustor shell. A floating collar is mounted outside the combustor shell with an opening in alignment with the opening in the combustor shell for receiving the fuel nozzle or the igniter. An external retaining bracket is mounted to the heat shield studs or other studs projecting outwardly from the combustor shell so as to trap the floating collar between the combustor shell and the bracket.

A combustor replacement method and a gas turbine plant capable of efficiently replacing a combustor using an existing facility. The combustor replacement method includes a step of separating, from a plurality of fuel supply systems, a first combustor that includes a plurality of nozzle systems connected to any of the plurality of fuel supply systems and supplied with fuel from the connected fuel supply systems, and removing the first combustor from a gas turbine plant. The method includes a step of attaching a second combustor that includes fewer nozzle systems than the first combustor to the gas turbine plant, and a step of providing communication between the fuel supply systems connected to the same nozzle system of the second combustor by a coupling pipe, and coupling the fuel supply systems and the second combustor.

A microtube cluster burner (1) comprises a multitude of ducts (41) extending through fluid plenums (31, 32, 33). Discharge means (51, 52) fluidly connect the plenums to the ducts. At least one of the ducts (41) is provided with at least two discharge means (51, 52) for discharging fluid from a plenum (31, 32) into the duct at at least two different longitudinal positions of the duct.

A method of reconditioning and fabricating turbine components is provided. In one embodiment, the method is performed on a fuel nozzle assembly of a gas turbine, and comprises providing a pre-assembled fuel nozzle assembly having a base, a body extending from the base to a fuel nozzle tip, an inner assembly, and an outer assembly. The method further comprises removing at least a portion of the fuel nozzle tip and the inner assembly, coupling and joining a replacement inner assembly to the base, and coupling and joining a replacement fuel nozzle tip to the replacement inner assembly and to the outer assembly to provide a reconditioned fuel nozzle.

A combustor (3) includes: a fuel nozzle configured to inject fuel; a tubular body (24) having a tubular shape in which a combustion region through which combustion gas flows is formed inside, and in which a plurality of slits (50) are formed extending in the circumferential direction at intervals in the circumferential direction; and throttle pieces (60) which are fitted into the slits (50), project radially inward from the inner circumferential side of the tubular body (24), and have a throttle face that extends along the flow direction of the combustion gas as it extends from the radially outer side inward.