Patents by Inventor Sebastian Walter Freund

Sebastian Walter Freund 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).

  • Publication number: 20180258850
    Abstract: A compressed air energy storage system is described, including a compressor fluidly coupled to a compressed air reservoir and an expansion train including at least a first turbine. The system further includes an electric machine aggregate configured: for converting electric power into mechanical power and driving the compressor therewith during the energy storing mode; and for converting mechanical power produced by the expansion train into electric power during the power production mode. A combustor is configured for receiving fuel and compressed air and producing combustion gas, and for supplying the combustion gas to the first turbine.
    Type: Application
    Filed: September 5, 2016
    Publication date: September 13, 2018
    Inventors: Stefano FRANCINI, Sebastian Walter FREUND, Vittorio MICHELASSI
  • Publication number: 20180202431
    Abstract: According to some embodiments, system and methods are provided, comprising providing a dual-mode model for a reciprocating compressor, wherein the model includes a measurement mode and a tuning mode; receiving one or more inputs to the model from an operating reciprocating compressor; and in response to receipt of the one or more inputs, executing the model in at least one of the measurement mode and the tuning mode, wherein: in a measurement mode, execution of the model further comprises calculating an actual flow rate of gas in the compressor based on the one or more inputs; and in a tuning mode, execution of the model further comprises calculating one of an unloader setting and a speed set point of a physical element of the compressor for a given flow rate of gas. Numerous other aspects are provided.
    Type: Application
    Filed: January 17, 2017
    Publication date: July 19, 2018
    Inventor: Sebastian Walter FREUND
  • Publication number: 20180142956
    Abstract: The present application provides a heat exchanger for exchanging heat between two fluid flows in cross-flow arrangement. The heat exchanger includes at least one heat exchanging module including a first heat exchanging component and a second heat exchanging component. The first heat exchanging component including a fluid inlet header, a fluid outlet header, and at least one heat exchanging passageway defining a first tube-side fluid flow path of a first portion of a fluid in a first direction. The second heat exchanging component including a fluid inlet header, a fluid outlet header, and at least one heat exchanging passageway defining a second tube-side fluid flow path in a second direction for an additional portion of the fluid, wherein the first direction is opposed to the second direction. The opposing first tube-side fluid flow path and the second tube-side fluid flow path equalizing the temperature distribution over the cross-section of a cross-flow fluid exiting the module.
    Type: Application
    Filed: November 22, 2016
    Publication date: May 24, 2018
    Inventor: Sebastian Walter Freund
  • Publication number: 20180066548
    Abstract: A combined cycle power plant is provided. The combined cycle power plant includes a gas turbine and a heat recovery steam generator disposed in fluid communication with the gas turbine and including one or more steam heater units. Additionally, the combined cycle power plant includes a recuperator unit integrated with the heat recovery steam generator and configured to use gas turbine exhaust from the gas turbine to preheat compressor discharge air from the compressor and supply the preheated compressor discharge air to the combustor, where a first subset of the one or more steam heater units is disposed in parallel to the recuperator unit, and where a second subset of the one or more steam heater units is disposed in series with the first subset of the one or more steam heater units and the recuperator unit with respect to a direction of flow of gas turbine exhaust.
    Type: Application
    Filed: September 7, 2016
    Publication date: March 8, 2018
    Inventor: Sebastian Walter Freund
  • Patent number: 9903284
    Abstract: Dual-fuel engine system includes cylinders in which the cylinders have an intake valve and an exhaust valve that control a flow of fluid into and out of a combustion chamber of the corresponding cylinder. The intake valve is configured to have an intake valve closure (IVC) timing. The dual-fuel engine system is configured to operate in a single-fuel mode and a dual-fuel mode. The combustion chamber and a piston are designed to provide a compression ratio. The dual-fuel engine system also includes one or more processors that are operably coupled to and configured to control operation of the first fuel injector. The compression ratio and the IVC timing are selected to achieve a target pre-combustion temperature. The target pre-combustion temperature permits the dual-fuel engine system to operate at a high substitution rate in the dual-fuel mode and at a sufficient fuel efficiency in the single-fuel mode.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: February 27, 2018
    Assignee: General Electric Company
    Inventors: Thomas Michael Lavertu, Roy James Primus, Venu Gummadavelli Gupta, Sebastian Walter Freund, Omowoleola Chukwuemeka Akinyemi, Adam Edgar Klingbeil, Victor Manuel Salazar
  • Publication number: 20170328234
    Abstract: A nozzle assembly of a turbocharger includes a nozzle and a ring-shaped body. The nozzle has flow passages extending through the nozzle and configured to direct air received from a volute housing of the turbocharger through the nozzle to turbine blades of the turbocharger. The ring-shaped body is coupled with the nozzle and is configured to rotate around the nozzle. The ring-shaped body includes blocking segments that block the flow of the air and openings between the blocking segments that permit the air to flow through the ring-shaped body. The ring-shaped body is configured to rotate relative to the nozzle to change how many of the flow passages in the nozzle are blocked by the blocking segments of the ring-shaped body.
    Type: Application
    Filed: May 16, 2016
    Publication date: November 16, 2017
    Inventors: Rodrigo Rodriguez Erdmenger, Sebastian Walter Freund, Ismail Hakki Sezal, Aneesh Sridhar Vadvadgi
  • Patent number: 9540959
    Abstract: A system and method for generating electric power using a generator coupled to a turboexpander is disclosed. The system includes one or more thermal pumps configured for heating a fluid to generate a pressurized gas. A portion of the pressurized gas is discharged to a buffer chamber for further utilization in a Rankine system. A further portion of the pressurized gas is expanded in a turboexpander for driving a generator for generating electric power. Optionally, the system includes a pump to pressurize a portion of the fluid depending on the systems operating condition. The system further includes one or more sensors for sensing temperature and pressure and outputs one or more signals representative of the sensed state. The system includes a control unit for receiving the signals and outputs one or more control signals for controlling the flow of gases and liquid in the valves and the check valve.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: January 10, 2017
    Assignee: General Electric Company
    Inventors: Sebastian Walter Freund, Matthew Alexander Lehar, William Joseph Antel, Jr., Pierre S├ębastien Huck, Hannes Christopher Buck, Trevor James Kirsten, Kenneth William Kohl, Matthew Michael Lampo, Charles Michael Jones, Amit Gaikwad, Lars Olof Nord
  • Publication number: 20160341481
    Abstract: A submersible heat exchanger for transferring heat between fluid and water in an underwater environment includes a pipe having a length. The pipe includes a wall defining an interior passageway configured for fluid to flow through. A first fin is disposed on the pipe and extends from the wall in a first direction. The first fin extends in the longitudinal direction along the pipe. A second fin is disposed on the pipe and extends from the wall in a second direction different from the first direction. The second fin extends in the longitudinal direction along the pipe.
    Type: Application
    Filed: May 19, 2015
    Publication date: November 24, 2016
    Inventor: Sebastian Walter Freund
  • Publication number: 20160281604
    Abstract: An integrated heat recovery and cooling cycle system for use with a gas turbine engine, including a heat-to-power portion and an inlet cooling portion. The heat-to-power portion including a two-stage intercooled pump/compressor, a low-temperature heat source configured to receive a first portion of a flow of working fluid, one or more recuperators configured in parallel with the intercooler to receive a second portion of the flow of working fluid. The inlet cooling cycle including a chiller expander, a chiller compressor coupled to the chiller expander, a motor coupled to the chiller compressor and an inlet air heat exchanger in fluid communication with the chiller expander and the chiller compressor. The inlet cooling portion configured to receive a portion of the flow of working fluid. The system further including a working fluid condenser and an accumulator in fluid communication with the heat-to-power portion and the inlet cooling portion.
    Type: Application
    Filed: March 27, 2015
    Publication date: September 29, 2016
    Inventor: Sebastian Walter Freund
  • Publication number: 20160160864
    Abstract: An energy storage system includes an intercooler coupled to an axial compressor and a multi-stage radial compressor including a first stage radial compressor and a second stage radial compressor, coupled to the intercooler. The energy storage system further includes a thermal energy storage unit coupled to the multi-stage radial compressor and an air storage unit coupled to the thermal energy storage unit. The energy storage system also includes a turbine coupled to the thermal energy storage unit and a cooling system coupled to the axial compressor and configured to cool air fed to the axial compressor.
    Type: Application
    Filed: December 5, 2014
    Publication date: June 9, 2016
    Inventors: Guillaume Becquin, Mathilde Bieber, Sebastian Walter Freund
  • Publication number: 20160160811
    Abstract: Systems and methods are provided for controlling exhaust gas recirculation (EGR). In one example, an engine system includes a first EGR valve coupling an exhaust manifold to an engine exhaust system, a second EGR valve coupling the exhaust manifold to an engine intake system, and a control unit. The control unit selectively adjusts a position of the first EGR valve based on a target amount, and adjusts a position of the second EGR valve based on the target amount and a position of the first EGR valve. Responsive to a first degradation condition of the first EGR valve, the control unit adjusts the position of the second EGR valve based on the target amount and based on a pressure of the first exhaust manifold, and responsive to a second degradation condition of the first EGR valve, adjusts the position of the second EGR valve based on the target amount.
    Type: Application
    Filed: February 17, 2016
    Publication date: June 9, 2016
    Applicant: General Electric Company
    Inventors: Dipankar Deb, Manthram Sivasubramaniam, Prashant Srinivasan, Sharath Sridhar Aramanekoppa, Prem Kumar Patchaikani, Sachin Shivajirao Kulkarni, Sebastian Walter Freund, Jassin Marcel Fritz, Georgios Bikas, James Henry Yager, Shashi Kiran
  • Patent number: 9157388
    Abstract: Various methods and systems for an engine driving an electrical power generation system are provided. In one embodiment, an example method for an engine driving an electrical power generation system includes adjusting an engine speed in response to a relationship between oxygen and fuel while maintaining a power transmitted to the electrical power generation system.
    Type: Grant
    Filed: November 5, 2014
    Date of Patent: October 13, 2015
    Assignee: General Electric Company
    Inventors: James Robert Mischler, Jassin Marcel Fritz, Sebastian Walter Freund
  • Publication number: 20150053176
    Abstract: Various methods and systems for an engine driving an electrical power generation system are provided. In one embodiment, an example method for an engine driving an electrical power generation system includes adjusting an engine speed in response to a relationship between oxygen and fuel while maintaining a power transmitted to the electrical power generation system.
    Type: Application
    Filed: November 5, 2014
    Publication date: February 26, 2015
    Inventors: James Robert Mischler, Jassin Marcel Fritz, Sebastian Walter Freund
  • Patent number: 8944035
    Abstract: Exhaust gas recirculation (EGR) systems and methods are provided. In one embodiment, a method for controlling an engine includes providing a first EGR gas flow to an intake manifold of the engine by closing a first EGR valve or a second EGR valve and at least partially opening the other of the first EGR valve and the second EGR valve, wherein the first and second EGR valves are respectively positioned in first and second EGR passages respectively coupled between first and second donor cylinder groups and an intake manifold, and providing a second EGR gas flow that is higher than the first EGR gas flow to the intake manifold by fully opening the first EGR valve or the second EGR valve and at least partially opening the other of the first EGR valve and the second EGR valve.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: February 3, 2015
    Assignee: General Electric Company
    Inventors: Sebastian Walter Freund, Jassin Fritz, Georgios Bikas, Sean Jenkins
  • Patent number: 8925317
    Abstract: An exemplary turbocharger system for an internal combustion engine is provided. The turbocharger system includes a first turbine and a second turbine. The first turbine is in fluid communication with the internal combustion engine. The first turbine receives a first portion exhaust gas discharged from the internal combustion engine and provides a first turbine exhaust gas. The second turbine is in fluid communication with the first turbine via an inter-stage channel. The inter-stage channel transports the first turbine exhaust gas from the first turbine to the second turbine. The inter-stage channel is in thermal connection with an exhaust gas recirculation channel defined between an inlet and an outlet of the internal combustion engine. The first turbine exhaust gas flowing through the inter-stage channel is capable of being heated by a second portion exhaust gas discharged from the internal combustion engine and flowing through the exhaust gas recirculation channel.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: January 6, 2015
    Assignee: General Electric Company
    Inventors: Rodrigo Rodriguez Erdmenger, Cathal Clancy, Daniel Edward Loringer, Jassin Marcel Fritz, Neil Xavier Blythe, Lukas William Johnson, Sebastian Walter Freund, Pierre S├ębastien Huck, Jonathan Edward Nagurney, Yu Du, Matthias Lang, Rudolf Konrad Selmeier, Elisa Jubany Arribas
  • Patent number: 8904791
    Abstract: A power generation system is provided. The system comprises a first Rankine cycle-first working fluid circulation loop comprising a heater, an expander, a heat exchanger, a recuperator, a condenser, a pump, and a first working fluid; integrated with a) a second Rankine cycle-second working fluid circulation loop comprising a heater, an expander, a condenser, a pump, and a second working fluid comprising an organic fluid; and b) an absorption chiller cycle comprising a third working fluid circulation loop comprising an evaporator, an absorber, a pump, a desorber, a condenser, and a third working fluid comprising a refrigerant. In one embodiment, the first working fluid comprises CO2. In one embodiment, the first working fluid comprises helium, air, or nitrogen.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: December 9, 2014
    Assignee: General Electric Company
    Inventors: Matthew Alexander Lehar, Sebastian Walter Freund, Thomas Johannes Frey, Gabor Ast, Pierre Sebastien Huck, Monika Muehlbauer
  • Patent number: 8903575
    Abstract: Various methods and systems for an engine driving an electrical power generation system are provided. In one embodiment, an example method for an engine driving an electrical power generation system includes adjusting an engine speed in response to a relationship between oxygen and fuel while maintaining a power transmitted to the electrical power generation system.
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: December 2, 2014
    Assignee: General Electric Company
    Inventors: James Robert Mischler, Jassin Marcel Fritz, Sebastian Walter Freund
  • Patent number: 8875515
    Abstract: An expansion system is presented. One embodiment of the expansion system that includes a pump configured to pressurize a condensed working fluid received from a condenser. The expansion system further includes a heat exchanger coupled to the pump and configured to vaporize the condensed working fluid received from the pump. The expansion system also includes an expander coupled to the heat exchanger and configured to expand the vaporized working fluid flowing from an inlet side of the expander to an outlet side of the expander. In addition, the expansion system includes a generator coupled to the expander and configured to generate energy in response to the expansion of the vaporized working fluid. Further, the expansion system includes an integrated cooling unit configured to convey at least a portion of the condensed working fluid from an inlet side of the generator to an outlet side of the generator to dissipate heat generated by the generator.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: November 4, 2014
    Assignee: General Electric Company
    Inventors: Gabor Ast, Herbert Kopecek, Sebastian Walter Freund, Pierre Sebastien Huck
  • Patent number: 8763394
    Abstract: A method includes detecting a presence of a fouling layer in an exhaust gas recirculation cooler of an internal combustion engine. The flow of a coolant through the exhaust gas recirculation cooler is stopped for a predetermined period of time while the engine exhaust gas flows through the exhaust gas recirculation cooler. The flow of an engine exhaust gas exiting from the exhaust gas recirculation cooler is diverted to at least one of a turbine of a turbocharger, and an exhaust pipe of the internal combustion engine. The fouling layer from the exhaust gas recirculation cooler is expelled along with the engine exhaust gas exiting the exhaust gas recirculation cooler.
    Type: Grant
    Filed: October 25, 2010
    Date of Patent: July 1, 2014
    Assignee: General Electric Company
    Inventor: Sebastian Walter Freund
  • Publication number: 20140157776
    Abstract: A solar energy receiver includes a plurality of solar receiver elements. Each solar receiver element includes a substantially solid core configured to absorb solar radiation and to store the solar radiation as heat. The core includes a base surface and a plurality of absorption surfaces. The receiver further includes at least one fluid passageway defined within the core adjacent at least one absorption surface of the plurality of absorption surfaces, wherein the at least one fluid passageway is configured to channel a working fluid therethrough for absorbing heat stored in the core.
    Type: Application
    Filed: December 7, 2012
    Publication date: June 12, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Sebastian Walter Freund, Charles Michael Booth, Chiranjeev Singh Kalra