Patents by Inventor Peter Jansohn
Peter Jansohn has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7363756Abstract: In a method for the combustion of a fuel, a fuel or a premixed combustible mixture is introduced into a combustion space as a combustible fluid open jet. The velocity of the open jet is selected in such a way that it is impossible for a stable flame front to form, i.e. is in any event greater than the flame front velocity, and that, on account of a jet pump effect, flue gas is mixed into the combustible fluid jet from the combustion chamber in a jet-induced recirculation internally within the combustion chamber. The admixed flue gas dilutes and heats the combustible fluid. The heating causes the spontaneous ignition temperature to be exceeded, and a low-pollutant volumetric flame is formed in a highly dilute atmosphere.Type: GrantFiled: June 13, 2005Date of Patent: April 29, 2008Assignee: ALSTOM Technology LtdInventors: Elisabetta Carrea, Peter Jansohn
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Patent number: 7305831Abstract: A gas turbine adapted to operate in a highly diluted mode comprises a compressor 3 adapted to compress oxidant 5; a combustion chamber 3 adapted to accept the compressed oxidant 7 and provide an exit means for flue gas 9; a turbine 4; and a flue gas re-circulation means 12,13 adapted to re-circulate the flue gas 9 from the combustion chamber 3 and mix the said flue gas with the compressed oxidant 7 from the compressor 2 in order to provide a highly diluted mode of combustion with a flue gas re-circulation rate of from 100% to 200%.Type: GrantFiled: April 22, 2004Date of Patent: December 11, 2007Assignee: Alstom Technology Ltd.Inventors: Elisabetta Carrea, Timothy Griffin, Peter Jansohn
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Publication number: 20070261408Abstract: A gas turbine adapted to operate in a highly diluted mode comprises a compressor 3 adapted to compress oxidant 5; a combustion chamber 3 adapted to accept the compressed oxidant 7 and provide an exit means for flue gas 9; a turbine 4; and a flue gas re-circulation means 12, 13 adapted to re-circulate the flue gas 9 from the combustion chamber 3 and mix the said flue gas with the compressed oxidant 7 from the compressor 2 in order to provide a highly diluted mode of combustion with a flue gas re-circulation rate of from 100% to 200%.Type: ApplicationFiled: April 22, 2004Publication date: November 15, 2007Inventors: Elisabetta Carrea, Timothy Griffin, Peter Jansohn
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Patent number: 6986473Abstract: In an atomizer device for the production of a liquid-gas mixture (4), the mixture (4) is introduced, particularly for compression, into a nozzle arrangement (3) in which the kinetic energy of the mixture (4) is in large part converted into compression energy by a pressure rise of the air. The atomizer device (2) includes a central air feed (16) and a nozzle chamber (18) for the supply of liquid surrounding the air feed. At or in the atomizing device, means (17) are arranged in the nozzle chamber for producing a swirled liquid flow in the nozzle chamber (18), and the swirled liquid flow emerges via a nozzle aperture (19) surrounding the air feed.Type: GrantFiled: July 10, 2003Date of Patent: January 17, 2006Assignee: ALSTOM Technology Ltd.Inventors: Peter Jansohn, Alexander Ni, Sasha Savic
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Publication number: 20050282097Abstract: In a method for the combustion of a fuel, a fuel or a premixed combustible mixture is introduced into a combustion space as a combustible fluid open jet. The velocity of the open jet is selected in such a way that it is impossible for a stable flame front to form, i.e. is in any event greater than the flame front velocity, and that, on account of a jet pump effect, flue gas is mixed into the combustible fluid jet from the combustion chamber in a jet-induced recirculation internally within the combustion chamber. The admixed flue gas dilutes and heats the combustible fluid. The heating causes the spontaneous ignition temperature to be exceeded, and a low-pollutant volumetric flame is formed in a highly dilute atmosphere.Type: ApplicationFiled: June 13, 2005Publication date: December 22, 2005Inventors: Elisabetta Carrea, Peter Jansohn
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Patent number: 6966745Abstract: In a method and a device for intermediate cooling during compression in a gas turbine system, the gas turbine system includes at least one first (1) and one second compressor (2), a combustion chamber (3), and a turbine (4). At least one intermediate cooler (9) is located between the first (1) and second compressor (2). The intermediate cooling takes place at least in part or for the most part isentropically.Type: GrantFiled: June 20, 2003Date of Patent: November 22, 2005Assignee: ALSTOM Technology Ltd.Inventors: Peter Jansohn, Alexander Ni, Sasha Savic
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Patent number: 6887067Abstract: A catalytically operating burner with a catalyzer structure (4), useful in particular for a gas turbine system, has a heat-resistant carrier material (10) that forms the walls of several adjoining channels (13). The channels (13) pervade the catalyzer structure (4) in longitudinal direction and permit that a gaseous reaction mixture flows through the catalyzer structure (4). The walls are coated at least in part with a catalyst. In order to improve the catalytic conversion within the catalyzer structure (4), communicating openings (14) are constructed in the walls between an inlet end and an outlet end of the catalyzer structure (4). Adjoining channels (13) are able to communicate with each other through the communicating openings (14).Type: GrantFiled: April 30, 2001Date of Patent: May 3, 2005Assignee: Alstom Technology LTDInventors: Timothy Griffin, Peter Jansohn, Verena Schmidt, Dieter Winkler
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Patent number: 6834504Abstract: The invention relates to a premix burner with high flame stability for use in a heat generator, preferably in the combustion chamber of a gas turbine. Modern, lean-operated premix burners enable very low noxious emissions, but sometimes operate very close to the extinction limit. To increase the stability of the lean premix combustion by increasing the distance between flame temperature and extinction limit temperature the invention proposes to equip the burner in the mixing zone (200) with a net-like structure (201) for the premixing of combustion air and fuel. According to a preferred embodiment, the net-like structure (201) consists of a plurality of layers of individual wire mesh fabrics (202) arranged at a distance from each other. The wire mesh fabrics (202) are preferably equipped with an oxidation-promoting, catalytically active surface.Type: GrantFiled: July 22, 2002Date of Patent: December 28, 2004Assignee: Alstom Technology LTDInventors: Timothy Griffin, Peter Jansohn, Thomas Ruck
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Publication number: 20040060996Abstract: In an atomizer device for the production of a liquid-gas mixture (4), the mixture (4) is introduced, particularly for compression, into a nozzle arrangement (3) in which the kinetic energy of the mixture (4) is in large part converted into compression energy by a pressure rise of the air.Type: ApplicationFiled: July 10, 2003Publication date: April 1, 2004Inventors: Peter Jansohn, Alexander Ni, Sasha Savic
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Publication number: 20040031269Abstract: In a method and a device for intermediate cooling during compression in a gas turbine system, the gas turbine system comprises at least one first (1) and one second compressor (2), a combustion chamber (3), and a turbine (4). At least one intermediate cooler (9) is located between the first (1) and second compressor (2). The intermediate cooling takes place at least in part or for the most part isentropically.Type: ApplicationFiled: June 20, 2003Publication date: February 19, 2004Inventors: Peter Jansohn, Alexander Ni, Sasha Savic
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Patent number: 6679061Abstract: Described is a premix burner arrangement as well as a method for operating the same, comprising a pilot fuel feeding means for operating a combustion chamber of a gas turbine arrangement, a premix burner, wherein at least one fuel addition unit as well as supply air openings have been provided in such a way that gaseous and/or liquid fuel can be mixed with combustion supply air inside the premix burner and form a fuel/air mixture, which exits from the premix burner downstream in the direction towards the combustion chamber positioned after the premix burner arrangement and which can be ignited inside the combustion chamber in the form of a spatially largely stationary flame.Type: GrantFiled: November 26, 2001Date of Patent: January 20, 2004Assignee: Alstom Technology Ltd.Inventors: Christian Steinbach, Timothy Albert Griffin, Peter Jansohn, Thomas Ruck
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Patent number: 6625988Abstract: A premix burner arrangement with catalytic combustion provides a fuel/air mixture to a combustion chamber of a gas turbine arrangement. The premix burner arrangement includes a premix burner, at least one fuel addition unit, and air inlet openings arranged in such a way that at least one of gaseous and liquid fuel can be mixed with combustion inlet air inside the premix burner to form a fuel/air mixture. The fuel/air mixture exits from the premix burner downstream in the direction towards a combustion chamber positioned after the premix burner arrangement and can be ignited inside the combustion chamber. A catalyzer unit is provided before the entrance of the fuel/air mixture into the combustion chamber. Part of the fuel/air mixture can be introduced into and passed through the catalyzer unit before the catalyzed part of the fuel/air mixture flows together with the remaining portion of the fuel/air mixture into the combustion chamber.Type: GrantFiled: November 26, 2001Date of Patent: September 30, 2003Assignee: Alstom (Switzerland) LtdInventors: Wolfgang Weisenstein, Timothy Albert Griffin, Peter Jansohn, Thomas Ruck
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Publication number: 20030031972Abstract: The invention relates to a premix burner with high flame stability for use in a heat generator, preferably in the combustion chamber of a gas turbine. Modern, lean-operated premix burners enable very low noxious emissions, but sometimes operate very close to the extinction limit. To increase the stability of the lean premix combustion by increasing the distance between flame temperature and extinction limit temperature the invention proposes to equip the burner in the mixing zone (200) with a net-like structure (201) for the premixing of combustion air and fuel. According to a preferred embodiment, the net-like structure (201) consists of a plurality of layers of individual wire mesh fabrics (202) arranged at a distance from each other. The wire mesh fabrics (202) are preferably equipped with an oxidation-promoting, catalytically active surface.Type: ApplicationFiled: July 22, 2002Publication date: February 13, 2003Inventors: Timothy Griffin, Peter Jansohn, Thomas Ruck
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Publication number: 20020189257Abstract: Described is a premix burner arrangement as well as a method for operating the same, comprising a pilot fuel feeding means for operating a combustion chamber of a gas turbine arrangement, a premix burner, wherein at least one fuel addition unit as well as supply air openings have been provided in such a way that gaseous and/or liquid fuel can be mixed with combustion supply air inside the premix burner and form a fuel/air mixture, which exits from the premix burner downstream in the direction towards the combustion chamber positioned after the premix burner arrangement and which can be ignited inside the combustion chamber in the form of a spatially largely stationary flame.Type: ApplicationFiled: November 26, 2001Publication date: December 19, 2002Inventors: Christian Steinbach, Timothy Albert Griffin, Peter Jansohn, Thomas Ruck
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Publication number: 20020155403Abstract: A catalytically operating burner with a catalyzer structure (4), useful in particular for a gas turbine system, has a heat-resistant carrier material (10) that forms the walls of several adjoining channels (13). The channels (13) pervade the catalyzer structure (4) in longitudinal direction and permit that a gaseous reaction mixture flows through the catalyzer structure (4). The walls are coated at least in part with a catalyst. In order to improve the catalytic conversion within the catalyzer structure (4), communicating openings (14) are constructed in the walls between an inlet end and an outlet end of the catalyzer structure (4). Adjoining channels (13) are able to communicate with each other through the communicating openings (14).Type: ApplicationFiled: April 30, 2001Publication date: October 24, 2002Inventors: Timothy Griffin, Peter Jansohn, Verena Schmidt, Dieter Winkler
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Publication number: 20020106599Abstract: Described is a premix burner arrangement with catalytic combustion for operating a combustion chamber of a gas turbine arrangement, as well as a method to this effect, having a premix burner, wherein at least one fuel addition unit as well as inlet air openings have been provided in such a way that gaseous and/or liquid fuel can be mixed with combustion inlet air inside the premix burner and form a fuel/air mixture, which exits from the premix burner downstream in the direction towards the combustion chamber positioned after the premix burner arrangement and which can be ignited inside the combustion chamber.Type: ApplicationFiled: November 26, 2001Publication date: August 8, 2002Inventors: Wolfgang Weisenstein, Timothy Albert Griffin, Peter Jansohn, Thomas Ruck
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Patent number: 6378787Abstract: A novel combined pressure atomizing nozzle for gas-turbine burners is provided, with which an improved adaptation of the atomizing quality of liquids to the respective load conditions, i.e. good premixing over the entire load range, can be realized. To this end, the pressure atomizing nozzle comprises a nozzle body (1) having at least two separate feed passages (7, 12) for at least one liquid (14, 29, 31) to be atomized. The first feed passage (7) is at least partly enclosed by the second feed passage (12) and is connected downstream to an outer space (5) via a discharge orifice (11). The second feed passage (12) is likewise connected to the outer space (5), in which case the second feed passage (12) has at least two discharge orifices (13) to the outer space (5).Type: GrantFiled: September 14, 1998Date of Patent: April 30, 2002Assignee: AlstomInventors: Franz Büchi, Uwe Hoferer, Peter Jansohn, Christian Steinbach
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Patent number: 6186775Abstract: In a burner for operating a combustion chamber, which burner essentially comprises a swirl generator (100), a transition piece (200) arranged downstream of the swirl generator, and a mixing tube (20), transition piece (200) and mixing tube (20) forming the mixing section of the burner and being arranged upstream of a combustion space (30). A pilot-burner system (300) is arranged in the lower region of the mixing tube (20), which pilot-burner system (300), at minimized pollutant emissions, stabilizes the flame front, in particular in the transient load ranges. At least one ignition device (311) is integrated in the pilot-burner system (300).Type: GrantFiled: January 22, 1999Date of Patent: February 13, 2001Assignee: ABB Research Ltd.Inventors: Peter Jansohn, Dieter Köster, Thomas Ruck
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Patent number: 6106278Abstract: The object of the invention is to provide a novel combustion chamber which has an improved air supply and also ensures an optimum incident flow to the burners when the mass flows of cooling and combustion air are different. According to the invention, this is achieved in that the at least one cooling duct (10) is extended right into the plenum (13) and is formed inside the plenum (13) as a diffuser (14) having an orifice (12) leading into the plenum (13). The at least one opening (15, 15') in the burner dome (4) is arranged in the region of the diffuser (14) or directly downstream of its orifice (12). A bypass duct (16, 16') having an orifice (17, 17') leading into the plenum (13) follows downstream of each opening (15, 15'). The orifice (17, 17') of each bypass duct (16, 16') is oriented at least approximately in parallel with the orifice (12) of the diffuser (14) and is also designed so as to be offset step-like to the outside.Type: GrantFiled: May 15, 1998Date of Patent: August 22, 2000Assignee: ABB Research Ltd.Inventors: Leif Andersson, Peter Jansohn, Jonathan Lloyd
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Patent number: 5934555Abstract: A pressure atomizer nozzle comprises a nozzle body (30) in which is formed a turbulence and/or swirl chamber (39) and having a nozzle bore (33). At least one first feed channel (41, 41a) for the liquid (37) to be atomized connects to the chamber as a first feed stage for feeding said liquid (37) under pressure. At least one second feed channel (38) connects to the chamber as a second feed stage for feeding part of the liquid (37) to be atomized or for feeding a second liquid (37') to be atomized. The second feed channel feeds liquid into the chamber under pressure and with a swirl. The two stage pressure atomizer nozzle allows, for example, simple adaptation of the fuel spray cone angle to the respective operating conditions of a gas turbine burner.Type: GrantFiled: March 4, 1997Date of Patent: August 10, 1999Assignee: ABB Research Ltd.Inventors: Klaus Dobbeling, Peter Jansohn, Hans Peter Knopfel, Christian Steinbach