Patents by Inventor Hidetoshi Iida

Hidetoshi Iida 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).

  • Steam cooled system in combined cycle power plant
    Patent number: 6324829
    Abstract: A gas turbine steam cooled system has a high temperature portion 8 outlet steam temperature maintained to a predetermined value without a cooling steam pressure becoming lower than the pressure in the gas turbine cylinder. Steam coming from an intermediate pressure superheater 10 of a waste heat recovery boiler 2 is led into the high temperature portion 8 of the gas turbine for cooling thereof. The temperature of the cooling steam at the outlet of the high temperature portion 8 is detected by a high temperature portion outlet steam temperature detector 15, and a signal thereof is sent a lower value selector 19 via a temperature controller 11. Pressure in the gas turbine cylinder is detected by a gas turbine cylinder pressure detector 17, and pressure of the cooling steam at the high temperature portion 8 outlet is detected by a high temperature portion outlet steam pressure detector 16. A differential signal thereof is sent to a pressure controller 18.
    Type: Grant
    Filed: January 27, 1999
    Date of Patent: December 4, 2001
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Yoshiyuki Kita, Tomoka Tanaka, Yasuhiro Hashimoto, Masayuki Takahama, Jun Yasuraoka, Hidetoshi Iida, Koichi Akagi, Hideki Haruta