Patents by Inventor Yukimasa Nakamoto

Yukimasa Nakamoto 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).

  • Patent number: 10844753
    Abstract: A boiler including one or more evaporators, an economizer, and a low-temperature heat exchanger. The economizer is located on a downstream side of the most downstream evaporator which is an evaporator at the most downstream side among the one or more evaporators. The low-temperature heat exchanger is located on the downstream side of the economizer, has an inlet for receiving water from the outside, and is configured to heat the water introduced from the inlet and sent to the economizer with the combustion gas.
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: November 24, 2020
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Hideyuki Uechi, Hiroyuki Yagita, Kuniaki Aoyama, Hideaki Sugishita, Yukimasa Nakamoto, Yuichi Oka, Naoki Hisada, Tarou Ichihara
  • Publication number: 20200325799
    Abstract: A gas turbine includes: a compressor configured to compress air; a combustor configured to combust fuel in the air compressed by the compressor so as to generate combustion gas; and a turbine configured to be driven using the combustion gas. Air coolers are configured to bleed the air from a plurality of places having different pressures in the compressor and cool the air bled from the respective places so as to generate cooling air. A waste heat recovery device is configured to recover waste heat from at least two of the air coolers.
    Type: Application
    Filed: May 6, 2020
    Publication date: October 15, 2020
    Inventors: Hideyuki UECHI, Hideaki SUGISHITA, Yukimasa NAKAMOTO, Yuichi OKA
  • Patent number: 10804549
    Abstract: Provided are: a power generation system that can generate electric power efficiently with a fuel cell; and a method for operating said power generation system. This power generation system comprises: a fuel cell including a plurality of unit fuel cell modules; a gas turbine; various lines for circulating fuel gas, air, discharged fuel gas, and discharged air between the fuel cell and the gas turbine; and a control device. The control device determines the number of said unit fuel cell modules to be operated on the basis of the required power generation amount, and operates the determined number of said unit fuel cell modules.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: October 13, 2020
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Yukimasa Nakamoto, Kazunori Fujita
  • Patent number: 10533495
    Abstract: This power generation system is provided with: a gas turbine having a compressor, a combustor and a turbine; a first compressed air supply line that supplies compressed air, which has been compressed by the compressor, to the combustor; a solid oxide fuel cell (SOFC) having an air electrode and a fuel electrode; a compressed air supply device capable of generating compressed air; and a second compressed air supply line that supplies compressed air, which has been compressed by the compressed air supply device to the SOFC. The fuel cell can thus be stably operated regardless of the operating state of the gas turbine.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: January 14, 2020
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Yukimasa Nakamoto, Kazunori Fujita
  • Patent number: 10490832
    Abstract: A power generation system includes a gas turbine having a compressor, a combustor, and a turbine, an inlet guide vane in an air intake port in the compressor, a first compressed air supply line for supplying compressed air compressed by the compressor to the combustor, a solid oxide fuel cell (SOFC) having an air electrode and a fuel electrode, a second compressed air supply line for supplying at least part of the compressed air compressed by the compressor to the air electrode, a control valve in the second compressed air supply line, and a control device for opening the control valve when the SOFC is activated and changing a degree of opening of the inlet guide vane from a preset reference degree of opening.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: November 26, 2019
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: So Manabe, Yukimasa Nakamoto, Hiroyuki Ozawa
  • Patent number: 10480411
    Abstract: A waste heat recovery device includes: a low-boiling-point medium Rankine cycle in which a low-boiling-point medium circulates while the low-boiling-point medium is repeatedly condensed and evaporated; a heated water line that guides liquid water, which is heated here, to the low-boiling-point medium Rankine cycle from a waste heat recovery boiler; and a water recovery line that returns the water, which has passed through the low-boiling-point medium Rankine cycle, to the waste heat recovery boiler. The low-boiling-point medium Rankine cycle includes a heater that heats the low-boiling-point medium by exchanging heat between the low-boiling-point medium, which is a liquid, and liquid water, which has passed through the heated water line.
    Type: Grant
    Filed: March 16, 2015
    Date of Patent: November 19, 2019
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Hideyuki Uechi, Hideaki Sugishita, Yukimasa Nakamoto, Yuichi Oka
  • Publication number: 20190234243
    Abstract: A heat exchange system includes: a gas line through which a gas to be cooled flows; a first heat exchanger disposed in the gas line and configured to cool the gas through heat exchange with a refrigerant; a refrigerant introduction line for introducing the refrigerant into the first heat exchanger; a refrigerant discharge line for discharging the refrigerant after cooling the gas from the first heat exchanger; a recirculation line for recirculating at least a part of the refrigerant flowing through the refrigerant discharge line into the refrigerant introduction line; and a flow-rate adjustment unit for adjusting a flow rate of the refrigerant flowing through the recirculation line so that a temperature of the refrigerant introduced into the first heat exchanger from the refrigerant introduction line is not lower than a threshold.
    Type: Application
    Filed: September 4, 2017
    Publication date: August 1, 2019
    Inventors: Naoki SHINO, Yukimasa NAKAMOTO, Isamu MATSUMI, Atsushi KUBOTA
  • Publication number: 20180212261
    Abstract: A power generation system includes a gas turbine having a compressor, a combustor, and a turbine, an inlet guide vane in an air intake port in the compressor, a first compressed air supply line for supplying compressed air compressed by the compressor to the combustor, a solid oxide fuel cell (SOFC) having an air electrode and a fuel electrode, a second compressed air supply line for supplying at least part of the compressed air compressed by the compressor to the air electrode, a control valve in the second compressed air supply line, and a control device for opening the control valve when the SOFC is activated and changing a degree of opening of the inlet guide vane from a preset reference degree of opening.
    Type: Application
    Filed: March 26, 2018
    Publication date: July 26, 2018
    Inventors: So MANABE, Yukimasa NAKAMOTO, Hiroyuki OZAWA
  • Patent number: 9979033
    Abstract: A power generation system includes a gas turbine having a compressor, a combustor, and a turbine, an inlet guide vane in an air intake port in the compressor, a first compressed air supply line for supplying compressed air compressed by the compressor to the combustor, a solid oxide fuel cell (SOFC) having an air electrode and a fuel electrode, a second compressed air supply line for supplying at least part of the compressed air compressed by the compressor to the air electrode, a control valve in the second compressed air supply line, and a control device for opening the control valve when the SOFC is activated and changing a degree of opening of the inlet guide vane from a preset reference degree of opening.
    Type: Grant
    Filed: October 28, 2013
    Date of Patent: May 22, 2018
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: So Manabe, Yukimasa Nakamoto, Hiroyuki Ozawa
  • Patent number: 9945265
    Abstract: A power generation system having a gas turbine, a fuel cell, an exhaust air circulation line, an exhaust fuel gas supply line, a turbine, an exhaust heat recovery boiler, and at least one exhaust air heat exchanger. The turbine is equipped with a high-pressure turbine, a medium-pressure turbine, and a low-pressure turbine. The exhaust heat recovery boiler is equipped with a high-pressure steam circulation mechanism, a medium-pressure steam circulation mechanism, and a low-pressure steam circulation mechanism. The exhaust air heat exchanger exchanges heat between the steam exchanging heat with the exhaust gas in the high-pressure steam circulation mechanism or the medium-pressure steam circulation mechanism and flowing toward the turbine and the exhaust gas flowing through the exhaust air circulation line, thereby increasing the temperature of the steam and decreasing the temperature of the exhaust gas.
    Type: Grant
    Filed: November 5, 2013
    Date of Patent: April 17, 2018
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Yukimasa Nakamoto, Kazunori Fujita
  • Publication number: 20180058267
    Abstract: A boiler including one or more evaporators, an economizer, and a low-temperature heat exchanger. The economizer is located on a downstream side of the most downstream evaporator which is an evaporator at the most downstream side among the one or more evaporators. The low-temperature heat exchanger is located on the downstream side of the economizer, has an inlet for receiving water from the outside, and is configured to heat the water introduced from the inlet and sent to the economizer with the combustion gas.
    Type: Application
    Filed: March 22, 2016
    Publication date: March 1, 2018
    Inventors: Hideyuki UECHI, Hiroyuki YAGITA, Kuniaki AOYAMA, Hideaki SUGISHITA, Yukimasa NAKAMOTO, Yuichi OKA, Naoki HISADA, Tarou ICHIHARA
  • Patent number: 9831505
    Abstract: In order to protect the temperature of an exhaust stream in an exhaust line, even if the temperature of the exhaust stream discharged from a fuel cell exceeds a temperature during rated operation, a power generation system has: an SOFC; an exhaust air line or an exhaust fuel line, wherein the exhaust air line and exhaust fuel line carry exhaust air and exhaust fuel gas discharged from the SOFC, respectively; a temperature detector for detecting the temperature of the exhaust air or the exhaust fuel gas discharged from the SOFC or the temperature of the exhaust air line or the exhaust fuel line; an exhaust cooling device for cooling the exhaust air in the exhaust air line or the exhaust fuel gas in the exhaust fuel line; and a control device for activating the exhaust cooling device when the temperature detected by the temperature detector exceeds a predetermined temperature.
    Type: Grant
    Filed: November 5, 2013
    Date of Patent: November 28, 2017
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Yukimasa Nakamoto, Kazunori Fujita
  • Patent number: 9806358
    Abstract: The present invention enables a fuel cell to be stably started by minimizing a lack of air in a gas turbine when starting the fuel cell.
    Type: Grant
    Filed: October 28, 2013
    Date of Patent: October 31, 2017
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Yukimasa Nakamoto, Kazunori Fujita
  • Patent number: 9777629
    Abstract: This power generation system is provided with: a gas turbine (11) having a compressor (21), a combustor (22) and a turbine (23); a first compressed air supply line (26) that supplies compressed air, which has been compressed by the compressor (21), to the combustor (22); a solid oxide fuel cell (SOFC) (13) having an air electrode and a fuel electrode; a compressed air supply device (61) capable of generating compressed air; and a second compressed air supply line (31) that supplies compressed air, which has been compressed by the compressed air supply device (61) to the SOFC (13). The fuel cell can thus be stably operated regardless of the operating state of the gas turbine.
    Type: Grant
    Filed: October 28, 2013
    Date of Patent: October 3, 2017
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Yukimasa Nakamoto, Kazunori Fujita
  • Publication number: 20170260902
    Abstract: This power generation system is provided with: a gas turbine having a compressor, a combustor and a turbine; a first compressed air supply line that supplies compressed air, which has been compressed by the compressor, to the combustor; a solid oxide fuel cell (SOFC) having an air electrode and a fuel electrode; a compressed air supply device capable of generating compressed air; and a second compressed air supply line that supplies compressed air, which has been compressed by the compressed air supply device to the SOFC. The fuel cell can thus be stably operated regardless of the operating state of the gas turbine.
    Type: Application
    Filed: May 31, 2017
    Publication date: September 14, 2017
    Inventors: Yukimasa NAKAMOTO, Kazunori FUJITA
  • Publication number: 20170152765
    Abstract: A gas turbine including: a compressor that compresses air; a combustor that combusts fuel in the compressed air so as to generate combustion gas; and a turbine that is driven using the combustion gas. A plurality of cooling air coolers bleed the air from a plurality of places having different pressures in the compressor and cool the air bled from the respective places, thereby generating cooling air is provided. A waste heat recovery device that recovers waste heat from the at least two cooling air coolers among the plurality of cooling air coolers is provided.
    Type: Application
    Filed: March 19, 2015
    Publication date: June 1, 2017
    Inventors: Hideyuki UECHI, Hideaki SUGISHITA, Yukimasa NAKAMOTO, Yuichi OKA
  • Publication number: 20170074164
    Abstract: A waste heat recovery device includes: a low-boiling-point medium Rankine cycle in which a low-boiling-point medium circulates while the low-boiling-point medium is repeatedly condensed and evaporated; a heated water line that guides liquid water, which is heated here, to the low-boiling-point medium Rankine cycle from a waste heat recovery boiler; and a water recovery line that returns the water, which has passed through the low-boiling-point medium Rankine cycle, to the waste heat recovery boiler. The low-boiling-point medium Rankine cycle includes a heater that heats the low-boiling-point medium by exchanging heat between the low-boiling-point medium, which is a liquid, and liquid water, which has passed through the heated water line.
    Type: Application
    Filed: March 16, 2015
    Publication date: March 16, 2017
    Applicant: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Hideyuki UECHI, Hideaki SUGISHITA, Yukimasa NAKAMOTO, Yuichi OKA
  • Patent number: 9347377
    Abstract: The invention provides a gas-turbine fuel nozzle that includes a plurality of fuel supply channels to which fuel is supplied, a plurality of fuel/sweep-fluid supply channels to which fuel or a sweep fluid for sweeping the fuel is supplied, and a plurality of injection holes that are provided at downstream ends of the fuel supply channels or the fuel/sweep-fluid supply channels and that inject the fuel guided from the fuel supply channels or the fuel/sweep-fluid supply channels; a sweep-fluid supply channel that is connected to the fuel/sweep-fluid supply channels to guide the sweeping; and sweep-fluid cooling means for cooling the sweep-fluid to a temperature lower than a self-ignition temperature of the fuel.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: May 24, 2016
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Masayuki Murakami, Kazuya Higashi, Yukimasa Nakamoto, Satoko Fujii, Takeyuki Shimizu, Keigo Matsumoto
  • Publication number: 20160006057
    Abstract: Provided are: a power generation system that can generate electric power efficiently with a fuel cell; and a method for operating said power generation system. This power generation system comprises: a fuel cell including a plurality of unit fuel cell modules; a gas turbine; various lines for circulating fuel gas, air, discharged fuel gas, and discharged air between the fuel cell and the gas turbine; and a control device. The control device determines the number of said unit fuel cell modules to be operated on the basis of the required power generation amount, and operates the determined number of said unit fuel cell modules.
    Type: Application
    Filed: December 18, 2013
    Publication date: January 7, 2016
    Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Yukimasa NAKAMOTO, Kazunori FUJITA
  • Publication number: 20150345386
    Abstract: This power generation system is provided with: a gas turbine (11) having a compressor (21), a combustor (22) and a turbine (23); a first compressed air supply line (26) that supplies compressed air, which has been compressed by the compressor (21), to the combustor (22); a solid oxide fuel cell (SOFC) (13) having an air electrode and a fuel electrode; a compressed air supply device (61) capable of generating compressed air; and a second compressed air supply line (31) that supplies compressed air, which has been compressed by the compressed air supply device (61) to the SOFC (13). The fuel cell can thus be stably operated regardless of the operating state of the gas turbine.
    Type: Application
    Filed: October 28, 2013
    Publication date: December 3, 2015
    Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Yukimasa NAKAMOTO, Kazunori FUJITA