Patents by Inventor Daisuke ESAKI

Daisuke ESAKI 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).

  • Single-shaft combined cycle plant, testing method for single-shaft combined cycle plant, and control device for single-shaft combined cycle plant
    Patent number: 11572841
    Abstract: This single-shaft combined cycle plant comprises: a power generator; a gas turbine; a steam turbine that is driven by using waste heat from the gas turbine, and is connected to the power generator by a clutch when the rotational speed syncs with the rotational speed of the gas turbine; a steam turbine over-rotation prevention device; a gas turbine over-rotation prevention device; and a control device. The control device sets the power generator to an unloaded state and, whilst maintaining the rotational speed Ng of the gas turbine so as to be higher than the rotational speed Ns of the steam turbine and lower than the maximum rotational speed Nglim of the gas turbine, increases the rotational speed Ns of the steam turbine to the maximum rotational speed Nslim of the steam turbine (time t2-t4) and tests whether or not the steam turbine over-rotation prevention device operates normally.
    Type: Grant
    Filed: March 1, 2019
    Date of Patent: February 7, 2023
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Daisuke Esaki, Katsuhiro Aoki, Yoji Endo, Junya Ideguchi, Naoya Kanakuchi, Takashi Shiraiwa
  • SINGLE-SHAFT COMBINED CYCLE PLANT, TESTING METHOD FOR SINGLE-SHAFT COMBINED CYCLE PLANT, AND CONTROL DEVICE FOR SINGLE-SHAFT COMBINED CYCLE PLANT
    Publication number: 20210010393
    Abstract: This single-shaft combined cycle plant comprises: a power generator; a gas turbine; a steam turbine that is driven by using waste heat from the gas turbine, and is connected to the power generator by a clutch when the rotational speed syncs with the rotational speed of the gas turbine; a steam turbine over-rotation prevention device; a gas turbine over-rotation prevention device; and a control device. The control device sets the power generator to an unloaded state and, whilst maintaining the rotational speed Ng of the gas turbine so as to be higher than the rotational speed Ns of the steam turbine and lower than the maximum rotational speed Nglim of the gas turbine, increases the rotational speed Ns of the steam turbine to the maximum rotational speed Nslim of the steam turbine (time t2-t4) and tests whether or not the steam turbine over-rotation prevention device operates normally.
    Type: Application
    Filed: March 1, 2019
    Publication date: January 14, 2021
    Inventors: Daisuke ESAKI, Katsuhiro AOKI, Yoji ENDO, Junya IDEGUCHI, Naoya KANAKUCHI, Takashi SHIRAIWA