Patents by Inventor Hironao NAGAI

Hironao NAGAI 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).

  • Valve opening degree determination device for cooling-air adjustment valve, disk cavity target temperature determination device, and disk cavity temperature control device
    Patent number: 11536197
    Abstract: A valve opening degree determination device includes an object operating state acquisition unit configured to acquire an object operating state which is an operating state of a gas turbine before control, and a valve opening degree calculation unit configured to calculate the valve opening degree such that a disk cavity temperature after control is equal to or lower than a target temperature, based on the object operating state. The valve opening degree calculation unit is configured to determine an input value of the valve opening degree such that a prediction value of the disk cavity temperature is equal to or lower than the target temperature as the valve opening degree, based on a prediction model generated based on a plurality of previous data in which the operating state, the disk cavity temperature, and an actual opening degree of the cooling-air adjustment valve previously acquired are associated with each other.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: December 27, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Koki Tateishi, Shinichi Yoshioka, Hironao Nagai, Ryuji Takenaka, Koshiro Fukumoto
  • VALVE OPENING DEGREE DETERMINATION DEVICE FOR COOLING-AIR ADJUSTMENT VALVE, DISK CAVITY TARGET TEMPERATURE DETERMINATION DEVICE, AND DISK CAVITY TEMPERATURE CONTROL DEVICE
    Publication number: 20210040889
    Abstract: A valve opening degree determination device includes an object operating state acquisition unit configured to acquire an object operating state which is an operating state of a gas turbine before control, and a valve opening degree calculation unit configured to calculate the valve opening degree such that a disk cavity temperature after control is equal to or lower than a target temperature, based on the object operating state. The valve opening degree calculation unit is configured to determine an input value of the valve opening degree such that a prediction value of the disk cavity temperature is equal to or lower than the target temperature as the valve opening degree, based on a prediction model generated based on a plurality of previous data in which the operating state, the disk cavity temperature, and an actual opening degree of the cooling-air adjustment valve previously acquired are associated with each other.
    Type: Application
    Filed: April 11, 2019
    Publication date: February 11, 2021
    Inventors: Koki TATEISHI, Shinichi YOSHIOKA, Hironao NAGAI, Ryuji TAKENAKA, Koshiro FUKUMOTO