Patents by Inventor Takeo Hirasaki

Takeo Hirasaki 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).

  • Fuel supply system for gas turbine combustor and fuel supply method for gas turbine combustor
    Patent number: 9222414
    Abstract: A consumption amount of high-calorific gas such as coke oven gas (COG) during operation of a gas turbine is reduced, halt of the gas turbine due to clogging of a pilot system, a malfunction of a compressor which compresses high-calorific gas is prevented, and reliability of the gas turbine is improved. When operation of the gas turbine (11) starts, with use of both a first fuel supply system (31) which supplies a high-calorific fuel for a first nozzle constituting a combustor (17), and a second fuel supply system (32) which supplies a low-calorific fuel for a second nozzle constituting the combustor (17), the high-calorific fuel and the low-calorific fuel are supplied to the combustor (17), and at a time when the gas turbine (11) reaches output power which enables continuous operation with only the low-calorific fuel, supply of the high-calorific fuel to the combustor (17) is shut off, and only the low-calorific fuel is supplied to the combustor (17).
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: December 29, 2015
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Yosuke Eto, Ken Ugai, Yoshikiyo Okamoto, Ryo Higashi, Takeo Hirasaki
  • Fuel supply system for gas turbine combustor and fuel supply method for gas turbine combustor
    Publication number: 20120042658
    Abstract: A consumption amount of high-calorific gas such as coke oven gas (COG) during operation of a gas turbine is reduced, halt of the gas turbine due to clogging of a pilot system, a malfunction of a compressor which compresses high-calorific gas is prevented, and reliability of the gas turbine is improved. When operation of the gas turbine (11) starts, with use of both a first fuel supply system (31) which supplies a high-calorific fuel for a first nozzle constituting a combustor (17), and a second fuel supply system (32) which supplies a low-calorific fuel for a second nozzle constituting the combustor (17), the high-calorific fuel and the low-calorific fuel are supplied to the combustor (17), and at a time when the gas turbine (11) reaches output power which enables continuous operation with only the low-calorific fuel, supply of the high-calorific fuel to the combustor (17) is shut off, and only the low-calorific fuel is supplied to the combustor (17).
    Type: Application
    Filed: March 29, 2011
    Publication date: February 23, 2012
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Yosuke Eto, Ken Ugai, Yoshikiyo Okamoto, Ryo Higashi, Takeo Hirasaki
  • Combustor of a gas turbine having a nozzle pipe stand
    Patent number: 6957537
    Abstract: Manifolds are shaped cross star having curved surfaces inside thereof, and holes are bored in four corners of the manifolds. In mounting a combustor to a casing, oil in the manifolds is transmitted to the holes by way of the curved surfaces. As a result of this, oil is prevented from staying, and coking is prevented from occurring, inside the manifolds.
    Type: Grant
    Filed: April 15, 2003
    Date of Patent: October 25, 2005
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventor: Takeo Hirasaki
  • Combustor of gas turbine
    Publication number: 20040237531
    Abstract: Manifolds are shaped cross star having curved surfaces inside thereof, and holes are bored in four corners of the manifolds. In mounting a combustor to a casing, oil in the manifolds is transmitted to the holes by way of the curved surfaces. As a result of this, oil is prevented from staying, and coking is prevented from occurring, inside the manifolds.
    Type: Application
    Filed: April 2, 2004
    Publication date: December 2, 2004
    Inventor: Takeo Hirasaki