Patents by Inventor Klaus Doebbeling

Klaus Doebbeling 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).

  • Patent number: 11174784
    Abstract: An exemplary gas turbine power plant includes a gas turbine with a compressor having a compressor inlet. A combustion chamber follows the compressor and a turbine follows the combustion chamber. A cross section of the compressor inlet includes an inner sector and an outer sector in relation to the axis of rotation of the compressor. A plurality of feed ducts introduces oxygen-reduced gas into the inner sector of the compressor inlet. The plurality of feed ducts is arranged in the compressor inlet so as to be distributed in a circumferential direction on a circle concentrically with respect to the axis of the gas turbine.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: November 16, 2021
    Assignee: ANSALDO ENERGIA SWITZEERLAND AG
    Inventors: Jaan Hellat, Eribert Benz, Frank Graf, Torsten Wind, Felix Guethe, Klaus Doebbeling
  • Patent number: 10222067
    Abstract: The invention provides a new path of combustion technology for gas turbine operation with multifuel capability, low emissions of NOx and CO and high thermal efficiency. Further to the present invention providing a method for operating a combustor for a gas turbine and a combustor for a gas turbine are disclosed. The combustor includes a first combustion chamber with a wide operating range, a subsequent deflection unit for deflecting the hot gas flow of the first combustion chamber at least in circumferential direction and components for injecting and mixing additional air and/or fuel, and a sequential combustion chamber with a short residence time, where the temperature of the hot gases reaches its maximum.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: March 5, 2019
    Assignee: ANSALDO ENERGIA SWITZERLAND AG
    Inventors: Klaus Doebbeling, Ewald Freitag
  • Patent number: 10151250
    Abstract: The invention relates to a method of operating a gas turbine assembly, which includes a compressor, a combustor and a gas turbine. The method includes operating the gas turbine assembly at a partial load with respect to a base load of the gas turbine assembly; bypassing a portion of blow-off air from the compressor; and introducing the portion of blow-off air into an exhaust gas duct after the gas turbine. The gas turbine assembly, when operating at partial load, can maintain the air-to-fuel ratio approximately constant and hence to control the combustion flame temperature at a level where emissions are kept below the permission limit.
    Type: Grant
    Filed: January 20, 2015
    Date of Patent: December 11, 2018
    Assignee: ANSALDO ENERGIA SWITZERLAND AG
    Inventors: Klaus Doebbeling, Anton Nemet, Martin Zajadatz, Rene Waelchli
  • Patent number: 9963995
    Abstract: The present invention relates to a method of decelerating a turbine rotor of a turbine engine. At least one electric motor is engaged with the turbine rotor. A braking system, preferably the starting system, is engaged with the at least one electric motor, preferably the generator of the turbine engine, so as to use the at least one electric motor to apply a negative (braking) torque on the turbine rotor. The method includes after flame off, the braking system being used for dissipating kinetic energy available in the turbine engine after flame off by means of the at least one electric motor.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: May 8, 2018
    Assignee: ANSALDO ENERGIA IP UK LIMITED
    Inventors: Klaus Doebbeling, Christopher Michael Robson, Massimo Giusti
  • Publication number: 20180119612
    Abstract: An exemplary gas turbine power plant includes a gas turbine with a compressor having a compressor inlet. A combustion chamber follows the compressor and a turbine follows the combustion chamber. A cross section of the compressor inlet includes an inner sector and an outer sector in relation to the axis of rotation of the compressor. A plurality of feed ducts introduces oxygen-reduced gas into the inner sector of the compressor inlet. The plurality of feed ducts is arranged in the compressor inlet so as to be distributed in a circumferential direction on a circle concentrically with respect to the axis of the gas turbine.
    Type: Application
    Filed: December 29, 2017
    Publication date: May 3, 2018
    Applicant: ANSALDO ENERGIA SWITZERLAND AG
    Inventors: Jaan HELLAT, Eribert Benz, Frank Graf, Torsten Wind, Felix Guethe, Klaus Doebbeling
  • Patent number: 9856792
    Abstract: The invention relates to a method for operating a gas turbine, in which an oxygen-reduced gas and fresh air are delivered to a compressor of the gas turbine in a radially staged manner, the fresh air being delivered via an outer sector of the inlet cross section in relation to the axis of rotation of the compressor, and the oxygen-reduced gas being delivered via an inner sector of the inlet cross section in relation to the axis of rotation of the compressor. The invention relates, further, to a gas turbine power plant with a gas turbine having a compressor inlet which is followed by the flow duct of the compressor and which is divided into an inner sector and an outer sector, a feed for an oxygen-reduced gas being connected to the inner sector of the compressor inlet, and a fresh air feed being connected to the outer sector of the compressor inlet.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: January 2, 2018
    Assignee: ANSALDO ENERGIA SWITZERLAND AG
    Inventors: Jaan Hellat, Eribert Benz, Frank Graf, Torsten Wind, Felix Guethe, Klaus Doebbeling
  • Patent number: 9803549
    Abstract: A method and apparatus for the operation of a gas turbine unit with an evaporative intake air cooling system in the intake air pathway, wherein the return water flow of the evaporative intake air cooling system is used for the cooling of components of the gas turbine unit and/or of a generator coupled to the gas turbine unit and/or of another element coupled to the gas turbine unit, and a gas turbine unit adapted to be operated using this method.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: October 31, 2017
    Assignee: ANSALDO ENERGIA IP UK LIMITED
    Inventors: Klaus Doebbeling, Andreas Rueter, Christof Pfeiffer
  • Publication number: 20140360199
    Abstract: The invention relates to a method for operating a gas turbine, in which an oxygen-reduced gas and fresh air are delivered to a compressor of the gas turbine in a radially staged manner, the fresh air being delivered via an outer sector of the inlet cross section in relation to the axis of rotation of the compressor, and the oxygen-reduced gas being delivered via an inner sector of the inlet cross section in relation to the axis of rotation of the compressor. The invention relates, further, to a gas turbine power plant with a gas turbine having a compressor inlet which is followed by the flow duct of the compressor and which is divided into an inner sector and an outer sector, a feed for an oxygen-reduced gas being connected to the inner sector of the compressor inlet, and a fresh air feed being connected to the outer sector of the compressor inlet.
    Type: Application
    Filed: August 25, 2014
    Publication date: December 11, 2014
    Inventors: Jaan HELLAT, Eribert Benz, Frank Graf, Torsten Wind, Felix Guethe, Klaus Doebbeling
  • Patent number: 8843293
    Abstract: With a method for controlling a gas turbine in a power plant, a multiplicity of operating lines for the gas turbine for different gas turbine inlet temperatures TIT or gas turbine exhaust temperatures TAT and positions of the compressor inlet guide vane cascade VIGV are specified as a function of the load. For minimizing the electricity production costs during operation switching can be optionally carried out between different operating lines during constant or varying power output of the power plant.
    Type: Grant
    Filed: December 8, 2008
    Date of Patent: September 23, 2014
    Assignee: Alstom Technology Ltd.
    Inventors: Stefan Rofka, Andreas Rueter, Klaus Doebbeling, Martin Nicklas
  • Publication number: 20120216546
    Abstract: A method and apparatus for the operation of a gas turbine unit with an evaporative intake air cooling system in the intake air pathway, wherein the return water flow of the evaporative intake air cooling system is used for the cooling of components of the gas turbine unit and/or of a generator coupled to the gas turbine unit and/or of another element coupled to the gas turbine unit, and a gas turbine unit adapted to be operated using this method.
    Type: Application
    Filed: February 28, 2012
    Publication date: August 30, 2012
    Applicant: ALSTOM Technology Ltd
    Inventors: Klaus Doebbeling, Andreas Rueter, Christof Pfeiffer
  • Publication number: 20090150040
    Abstract: With a method for controlling a gas turbine in a power plant, a multiplicity of operating lines for the gas turbine for different gas turbine inlet temperatures TIT or gas turbine exhaust temperatures TAT and positions of the compressor inlet guide vane cascade VIGV are specified as a function of the load. For minimizing the electricity production costs during operation switching can be optionally carried out between different operating lines during constant or varying power output of the power plant.
    Type: Application
    Filed: December 8, 2008
    Publication date: June 11, 2009
    Applicant: ALSTOM TECHNOLOGY LTD
    Inventors: Stefan Rofka, Andreas Rueter, Klaus Doebbeling, Martin Nicklas
  • Patent number: 7476078
    Abstract: A rotor of a thermally loaded turbomachine, in particular of a compressor or a gas turbine, is mounted such that it can rotate about a rotor axis and is concentrically surrounded by a hot-gas duct or cooling-air duct. A significant improvement to the ability of the rotor to withstand thermal loads is achieved, with little increased outlay in terms of materials, by virtue of the fact that the rotor comprises a rotor core made of a first material, that the rotor core is concentrically surrounded by shielding rings made of a second material, which shield the rotor core from the temperature in the hot-gas duct or cooling-air duct, the second material having a higher heat resistance than the first material, and that the shielding rings are cohesively joined to the rotor core.
    Type: Grant
    Filed: February 14, 2005
    Date of Patent: January 13, 2009
    Assignee: Alstom Technology Ltd
    Inventors: Klaus Doebbeling, Joachim Krautzig
  • Patent number: 7216486
    Abstract: Relevant fuel-gas properties (XG) are measured on an ongoing basis while a gas turbine group is operating. The C2+alkane content of the fuel gas is of particular interest in this context, since it has a significant influence on the ignitability of the fuel gas in the combustion chamber. The operating parameters of the gas turbine group are acted on directly as a function of the measured fuel-gas properties. In particular, in the case of the example of a gas turbine group with sequential combustion, the distribution of the fuel mass flows ({dot over (m)}EV, {dot over (m)}SEV) between the combustion chambers (4, 8) of the gas turbine group is varied. Furthermore, if there is provision for inert media, such as water or steam, to be introduced, it is possible for the mass flow of inert media ({dot over (m)}ST) to be controlled as a function of the measured fuel properties.
    Type: Grant
    Filed: July 20, 2004
    Date of Patent: May 15, 2007
    Assignee: ALSTOM Technology Ltd.
    Inventors: Klaus Doebbeling, Ken-Yves Haffner, Rolf Rüetschi, Hanspeter Zinn
  • Publication number: 20060269403
    Abstract: A rotor (11) of a thermally loaded turbomachine, in particular of a compressor (10) or a gas turbine, is mounted such that it can rotate about a rotor axis (21) and is concentrically surrounded by a hot-gas duct (12) or cooling-air duct. A significant improvement to the ability of the rotor to withstand thermal loads is achieved, with little increased outlay in terms of materials, by virtue of the fact that the rotor (11) comprises a rotor core (22) made of a first material, that the rotor core (22) is concentrically surrounded by shielding rings (18) made of a second material, which shield the rotor core (22) from the temperature in the hot-gas duct (12) or cooling-air duct, the second material having a higher heat resistance than the first material, and that the shielding rings (18) are cohesively joined to the rotor core (22).
    Type: Application
    Filed: February 14, 2005
    Publication date: November 30, 2006
    Applicant: ALSTOM Technology Ltd
    Inventors: Klaus Doebbeling, Joachim Krautzig
  • Patent number: 7093450
    Abstract: In a method of operating a compressor, a gaseous medium is compressed in a first compressor stage. The partially compressed medium is sent from the first compressor stage into an intermediate cooler where it is cooled before being directed into the second compressor stage where it is compressed further. A liquid medium is sprayed into the gaseous medium in the intermediate cooler so that a two-phase mixture with a liquid phase and a gaseous phase is formed in the intermediate cooler. The liquid phase is separated again before adding it to the second compressor stage.
    Type: Grant
    Filed: December 1, 2004
    Date of Patent: August 22, 2006
    Assignee: ALSTOM Technology Ltd
    Inventors: Carlos Jimenez Haertel, Klaus Doebbeling
  • Publication number: 20050252231
    Abstract: In a method of operating a compressor, a gaseous medium is compressed in a first compressor stage. The partially compressed medium is sent from the first compressor stage into an intermediate cooler where it is cooled before being directed into the second compressor stage where it is compressed further. A liquid medium is sprayed into the gaseous medium in the intermediate cooler so that a two-phase mixture with a liquid phase and a gaseous phase is formed in the intermediate cooler. The liquid phase is separated again before adding it to the second compressor stage.
    Type: Application
    Filed: December 1, 2004
    Publication date: November 17, 2005
    Inventors: Carlos Jimenez Haertel, Klaus Doebbeling
  • Publication number: 20050180847
    Abstract: A rotor (11) of a thermally loaded turbomachine, in particular of a compressor (10) or a gas turbine, is mounted such that it can rotate about a rotor axis (21) and is concentrically surrounded by a hot-gas duct (12) or cooling-air duct. A significant improvement to the ability of the rotor to withstand thermal loads is achieved, with little increased outlay in terms of materials, by virtue of the fact that the rotor (11) comprises a rotor core (22) made of a first material, that the rotor core (22) is concentrically surrounded by shielding rings (18) made of a second material, which shield the rotor core (22) from the temperature in the hot-gas duct (12) or cooling-air duct, the second material having a higher heat resistance than the first material, and that the shielding rings (18) are cohesively joined to the rotor core (22).
    Type: Application
    Filed: February 14, 2005
    Publication date: August 18, 2005
    Applicant: ALSTOM Technology Ltd
    Inventors: Klaus Doebbeling, Joachim Krautzig
  • Publication number: 20050028530
    Abstract: Relevant fuel-gas properties (XG) are measured on an ongoing basis while a gas turbine group is operating. The C2+alkane content of the fuel gas is of particular interest in this context, since it has a significant influence on the ignitability of the fuel gas in the combustion chamber. The operating parameters of the gas turbine group are acted on directly as a function of the measured fuel-gas properties. In particular, in the case of the example of a gas turbine group with sequential combustion, the distribution of the fuel mass flows ({dot over (m)}EV, {dot over (m)}SEV) between the combustion chambers (4, 8) of the gas turbine group is varied. Furthermore, if there is provision for inert media, such as water or steam, to be introduced, it is possible for the mass flow of inert media ({dot over (m)}ST) to be controlled as a function of the measured fuel properties.
    Type: Application
    Filed: July 20, 2004
    Publication date: February 10, 2005
    Inventors: Klaus Doebbeling, Ken-Yves Haffner, Rolf Ruetschi, Hanspeter Zinn
  • Publication number: 20050032014
    Abstract: A combustion system for a heat generator, the burner 1 being connected to a combustion chamber 6 by means of an outlet 10, wherein the outlet 10 comprises a multiply stepped transional structure 11 in the direction of flow of fluid 3 in the burner 1 so as to create turbulence in the fluid flow.
    Type: Application
    Filed: December 3, 2003
    Publication date: February 10, 2005
    Inventors: Klaus Doebbeling, Ephraim Gutmark, Christian Paschereit
  • Patent number: 6708497
    Abstract: The invention relates to a method of operating a gas turbine installation (1), compressed fresh air (6, 19, 38) is branched off after a compressor (2) and supplied to an evaporator device (14), in the evaporator device (14) feed water (17, 26, 28) is evaporated, while heat is supplied, and is mixed with the fresh air (6, 19, 38) in order to generate a steam/air mixture (22, 37), the steam/air mixture (22, 37) is fed back upstream of a gas turbine (10), the heat required for the evaporation of the feed water (17, 26, 28) is at least partially extracted from an exhaust gas (12) of the gas turbine (10). In order to improve the efficiency of the gas turbine installation (1), the feed water (17, 26, 28) runs down along a wall arrangement (39) heated by the exhaust gas (12) and is subjected to the fresh air (6, 19, 38). The feed water (17, 26, 28) evaporates and mixes with the fresh air (6, 19, 38), by which means the steam/air mixture (22, 37) forms for the recirculation.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: March 23, 2004
    Assignee: Alstom Technology Ltd
    Inventors: Klaus Doebbeling, Hans-Erik Hansson, Dieter Winkler