Patents by Inventor John Nest

John Nest 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).

  • System and method for controlling water injection in a turbine engine
    Patent number: 6938425
    Abstract: A method for controlling the injection of water into the combustor (16) of a gas turbine (18) may include determining a flow rate of water to be injected into the combustor (16) and controlling (86) a centrifugal pump (20) with a variable frequency drive (40) to control the flow rate of water. The flow rate of water may be further controlled by controlling (88) a throttle valve (32) to control water flow through a recirculation line (28) of a water circuit (24) that directs the flow rate of water to the combustor (16). A system (10) for controlling the injection of water into the combustor (16) may include a water delivery circuit (24) for directing water from a water supply (12) to the combustor (16), a centrifugal pump (20) for pumping water through the water delivery circuit (24) and a variable frequency drive (40) for controlling a motor (42) driving the centrifugal pump (20).
    Type: Grant
    Filed: August 11, 2003
    Date of Patent: September 6, 2005
    Assignee: Siemens Westinghouse Power Corporation
    Inventors: Gerard E. Simpson, John Nest
  • System and method for controlling water injection in a turbine engine
    Publication number: 20050034463
    Abstract: A method for controlling the injection of water into the combustor (16) of a gas turbine (18) may include determining a flow rate of water to be injected into the combustor (16) and controlling (86) a centrifugal pump (20) with a variable frequency drive (40) to control the flow rate of water. The flow rate of water may be further controlled by controlling (88) a throttle valve (32) to control water flow through a recirculation line (28) of a water circuit (24) that directs the flow rate of water to the combustor (16). A system (10) for controlling the injection of water into the combustor (16) may include a water delivery circuit (24) for directing water from a water supply (12) to the combustor (16), a centrifugal pump (20) for pumping water through the water delivery circuit (24) and a variable frequency drive (40) for controlling a motor (42) driving the centrifugal pump (20).
    Type: Application
    Filed: August 11, 2003
    Publication date: February 17, 2005
    Inventors: Gerard Simpson, John Nest