A fuel nozzle assembly includes a flange body including a stem. The flange body defines a flow passage therethrough. The fuel nozzle assembly further includes a conduit assembly having an inner tube that is disposed within an outer tube. A purge passage is defined radially between the inner tube and the outer tube and a fuel passage is defined within the inner tube. The outer tube and the inner tube are connected to the stem with the inner tube being connected to the stem via a flexible coupling disposed within the purge passage. The purge passage is in fluid communication with an inlet flow plenum and with a plurality of premix tubes of the fuel nozzle assembly.

A fuel nozzle assembly includes a flange body including a stem. The flange body defines a flow passage therethrough. The fuel nozzle assembly further includes a conduit assembly having an inner tube that is disposed within an outer tube. A purge passage is defined radially between the inner tube and the outer tube and a fuel passage is defined within the inner tube. The outer tube and the inner tube are connected to the stem with the inner tube being connected to the stem via a flexible coupling disposed within the purge passage. The purge passage is in fluid communication with an inlet flow plenum and with a plurality of premix tubes of the fuel nozzle assembly.

A purging and/or sealing apparatus for conveying a purging and/or sealing fluid to at least one burner of a gas turbine plant. The purging and/or sealing apparatus has a pressure accumulator and a heating device, wherein the pressure accumulator is connected to the at least one burner via a first fluid line, with the heating device connected therebetween. A gas turbine plant and a method for purging and/or sealing has at least one burner and a purging and/or sealing apparatus.

A purging and/or sealing apparatus for conveying a purging and/or sealing fluid to at least one burner of a gas turbine plant. The purging and/or sealing apparatus has a pressure accumulator and a heating device, wherein the pressure accumulator is connected to the at least one burner via a first fluid line, with the heating device connected therebetween. A gas turbine plant and a method for purging and/or sealing has at least one burner and a purging and/or sealing apparatus.

An oxygen removal system for removing dissolved oxygen from fuel within a fuel system includes a first housing, a second housing, a membrane filter, a piston assembly, and an outlet cap. The first housing extends along a first axis between a first housing first end and a first housing second end. The second housing is disposed about the first housing. The membrane filter is disposed between the first housing and the second housing. The piston assembly has a piston housing that is disposed about the second housing. The piston assembly is arranged to generate a vacuum to remove a fluid from the membrane filter.

A heating device operating with liquid fuel in the single-line mode includes a fuel pump which draws fuel from a supply tank and delivers it into a pressure line region communicating with an atomiser nozzle opening into a combustion chamber, wherein excess fuel is returned from the pressure region to the suction side of the fuel pump by way of a pressure regulator, a return line and a bypass line. Arranged between the return line and the bypass line is a venting apparatus including an actuating element which is reciprocable between an operating position and a venting position and which in the operating position connects the return line to the bypass line to reliably seal the medium in the lines towards the exterior and in the venting position connects the return line to the exterior of the heating device and in that case closes the bypass line.

A heating device operating with liquid fuel in the single-line mode includes a fuel pump which draws fuel from a supply tank and delivers it into a pressure line region communicating with an atomiser nozzle opening into a combustion chamber, wherein excess fuel is returned from the pressure region to the suction side of the fuel pump by way of a pressure regulator, a return line and a bypass line. Arranged between the return line and the bypass line is a venting apparatus including an actuating element which is reciprocable between an operating position and a venting position and which in the operating position connects the return line to the bypass line to reliably seal the medium in the lines towards the exterior and in the venting position connects the return line to the exterior of the heating device and in that case closes the bypass line.

A fuel delivery system for a gas turbine engine includes a fuel source; a draw pump downstream of the fuel source for generating a liquid fuel flow from the fuel source; a main fuel pump downstream of the draw pump; and a fuel oxygen reduction unit downstream of the draw pump and upstream of the main fuel pump. The fuel oxygen reduction unit includes a stripping gas line; a contactor in fluid communication with the stripping gas line and the draw pump for forming a fuel/gas mixture, wherein the contactor receives an inlet fuel flow from the draw pump; a separator in fluid communication with the contactor, the separator receives the fuel/gas mixture and separates the fuel/gas mixture into an outlet stripping gas flow and an outlet fuel flow at a location upstream of the main fuel pump; a catalyst disposed downstream of the separator, the catalyst receives and treats the outlet stripping gas flow, wherein a stripping gas stream flows out the catalyst; and a water removal component disposed between the catalyst and the contactor, wherein the water removal component removes water from the stripping gas stream.

A fuel delivery system for a gas turbine engine includes a fuel source; a draw pump downstream of the fuel source for generating a liquid fuel flow from the fuel source; a main fuel pump downstream of the draw pump; and a fuel oxygen reduction unit downstream of the draw pump and upstream of the main fuel pump. The fuel oxygen reduction unit includes a stripping gas line; a contactor in fluid communication with the stripping gas line and the draw pump for forming a fuel/gas mixture, wherein the contactor receives an inlet fuel flow from the draw pump; a separator in fluid communication with the contactor, the separator receives the fuel/gas mixture and separates the fuel/gas mixture into an outlet stripping gas flow and an outlet fuel flow at a location upstream of the main fuel pump; a catalyst disposed downstream of the separator, the catalyst receives and treats the outlet stripping gas flow, wherein a stripping gas stream flows out the catalyst; and a water removal component disposed between the catalyst and the contactor, wherein the water removal component removes water from the stripping gas stream.

A method and fuel supply system for supply of a combustion chamber with at least one combustible fluid are provided. The fuel supply system includes a combustion chamber, at least one supply circuit, and at least one purge circuit, the purge circuit coupled to the at least one supply circuit, the purge circuit including at least two isolation valves defining a cavity between, a source of relatively high temperature purge air coupled in flow communication to the cavity through one of the at least two isolation valves, a source of relatively low temperature ventilation air coupled in flow communication to the cavity, and a vent coupled in flow communication to the cavity, the at least one purge circuit configured to channel a flow of relatively low temperature ventilation air from the source relatively low temperature ventilation air through the cavity to the vent during operation of the combustion chamber.