Abstract:
The invention refers to a sequential combustor arrangement (104) comprising a first burner (112), a first combustion chamber (101), a mixer (117) for admixing a dilution gas to the hot gases leaving the first combustion chamber (101) during operation, a second burner (113), and a second combustion chamber (102) arranged sequentially in a fluid flow connection. The mixer (117) comprises a plurality of injection pipes (114, 115) pointing inwards from the side walls (116) of the mixer (117) for admixing the dilution gas to cool the hot flue gases leaving the first combustion chamber (101) with a low pressure drop. The disclosure further refers to a method for operating a gas turbine (100) with such a combustor arrangement (104).
Abstract:
Wind turbine blade comprising a spar, a plurality of ribs rotatably mounted on said spar, and a rotating means adapted to rotate at least two consecutive ribs independently of each other. The blade can thus be operated so as to rotate at least two consecutive ribs independently of each other, although it is also possible to jointly rotate all the ribs.
Abstract:
The invention refers to an internally cooled casted airfoil for a rotary machine, preferably a gas turbine engine comprising a suction (1) and a pressure (2) side wall each extending in an axial direction, i.e. from a leading to a trailing edge region (3) of said airfoil; at least one suction wall sided cooling channel (4) extending in axial direction confined by the suction side wall (1) and a first inner wall (5); at least one pressure wall sided cooling channel (6) extending in axial direction confined by the pressure side wall (2) and a second inner wall (7); and at least one feed chamber (8) being defined between said first and second inner wall (5, 7) for feeding said at least one suction and pressure sided cooling channel (4, 6) each by at least one through hole (9, 10) inside of said first and second inner wall (5, 7). The invention is characterized in that said at least one suction wall sided cooling channel (4) and said at least one pressure wall sided cooling channel (6) extend into the trailing edge region (3) separately, and said at least one suction wall sided cooling channel (4) and said at least one pressure wall sided cooling channel (6) join before discharging at the trailing edge.
Abstract:
A switching device (28) comprising a primary switching block (30) including at least one semiconductor switch (34); and a switching control unit (32) to control the switching of the or each semiconductor switch (34). The switching device further includes a crowbar circuit (46) comprising a crowbar switch (56) switchable to selectively allow current to flow through the crowbar switch (56) in order to bypass the or each switching module; and a secondary switching block including a switching element (58) connected across a control electrode and a cathode of the crowbar switch (56). The switching element (58) is in communication with the switching control unit (32) to receive, in use, a control signal (66) generated by the switching control unit (32) when the primary switching block (30) is operating within predefined operating parameters.
Abstract:
The invention refers to a sequential combustor arrangement (4) comprising a first burner (10), a first combustion chamber (1 1 ), a mixer (12) for admixing a dilution gas (32) via a dilution gas inlet (19) to the hot gases leaving the first combustion chamber (1 1 ) during operation, a second burner (13), and a second combustion chamber (14) arranged sequentially in a fluid flow connection. The sequential combustor arrangement (4) further comprises four cooling zones with a cooling channel (15, 16, 17, 18). During operation a cooling gas (33) flows through the cooling channels (15, 16, 17, 18). The disclosure further refers to a method for operating a gas turbine (1 ) with such a sequential combustor arrangement (4).
Abstract:
A temperature control system, particularly for low load conditions, is described including a by-pass line (132) with a by-pass control valve (133) branching off a live steam circuit to a first steam turbine (14) in a sequence of at least two steam turbines (14, 18), with a steam exit line of the first turbine merging with the by-pass line into the inlet of a reheater (16) heated by a steam generator and connected to a second steam turbine (18) of the sequence of at least two steam turbines, and having a steam mixing chamber (151) at or after the point of merging and before the inlet into the reheater. The desired temperature is set by controlling the mass flow through the by-pass line and/or the first turbine.
Abstract:
The disclosure refers to a method for manufacturing winding parts (1) for an electric machine (26). The winding parts (1) include a conductor (2) and insulation (3) around it. The method includes providing the conductor (2) with an insulating tape (9) around it, providing dies (15) above the insulating tape (9), providing a thermosetting layer (17) around the dies (15), impregnating the insulating tape (9) with a resin (18), curing the resin (18) to realise the insulation (3), removing the thermosetting layer (17) and the dies (15).
Abstract:
Le dispositif de commande (16) comprend une vanne (26) comprenant un corps (30) relié à la première chambre (22) d'un vérin (6) par une première liaison hydraulique (32) et à la deuxième chambre (24) du vérin (6) par une deuxième liaison hydraulique (34). Le dispositif comprend une première conduite hydraulique (42), destinée à être reliée à une première source de fluide d'actionnement (40), et une deuxième conduite hydraulique (46) destinée à être reliée à une deuxième source de fluide d'actionnement (44), lesdites conduites hydrauliques (42, 46) étant en communication avec le corps (30) de la vanne (26), ladite vanne (26) comprenant en outre un dispositif de distribution (56) mobile dans le corps (30) de la vanne (26) entre une première position, dans laquelle le dispositif de distribution (56) met en communication fluidique la première liaison hydraulique (32) et la première conduite hydraulique (42), et une deuxième position, dans laquelle le dispositif de distribution (56) met en communication fluidique la deuxième liaison hydraulique (34) et la deuxième conduite hydraulique (46).
Abstract:
Power plant (1) and method to operate such a power plant, the power plant comprising a gas turbine (2) and a heat recovery boiler arrangement (3). The gas turbine comprises a compressor inlet (18) with a fresh air intake sector (64) and an intake sector for recirculated flue gas. A common control element (37, 38) for the control of the fresh air (61) flow and of the recirculated flue gas (69) flow is arranged in the compressor (5) and/ or in the compressor intake (66).
Abstract:
The invention pertains a power plant (1) comprising a gas turbine (2), a heat recovery boiler arrangement (3) with at least a boiler inlet (10), and an outlet side with a first exit (13) connected to a stack (15) and a second exit (14) connected to a flue gas recirculation (4), which connects the second exit (14) to the compressor inlet (18) of the gas turbine (2). The heat recovery boiler arrangement (3) comprises a first boiler flue gas path (20) from the boiler inlet (10) to the first boiler exit (13), and a separate second boiler flue gas path (21) from the boiler inlet (10) to the second boiler exit (14). Additionally, a supplementary firing (49) and a subsequent catalytic NOx converter (50) are arranged in the first boiler flue gas path (20). Besides the power plant (1) a method to operate such a power plant (1) is an object of the invention.