Patents by Inventor Satoko Fujii
Satoko Fujii 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: 10669941Abstract: A gas turbine cooling system includes: a cooling air line that guides compressed air; a cooler that cools the compressed air; a flow rate adjuster that adjusts the flow rate of the cooling air; and a control device. The control device includes: a load change determination unit that determines whether a load indicated by a load command of the gas turbine has changed; a first command generation section that generates a first command indicating such an operation amount of the flow rate adjuster as allows the flow rate of the cooling air to meet a target flow rate; and a second command generation section that, when it is determined that the load indicated by the load command has changed, generates a second command indicating such an operation amount of the flow rate adjuster as allows a change-adapted flow rate higher than the target flow rate to be met.Type: GrantFiled: December 6, 2016Date of Patent: June 2, 2020Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Satoko Fujii, Tetsuya Yabe, Kazuya Higashi
-
Patent number: 10465608Abstract: A temperature control device includes a temperature difference calculation unit that calculates a temperature difference between an inlet and an outlet of a boost compressor on the basis of a pressure ratio of the inlet and the outlet of the boost compressor and an IGV opening degree of the boost compressor, the boost compressor outputting cooling air obtained by cooling compressed air from a compressor to a cooling target; a temperature information calculation unit that calculates temperature information for feedback control for at least one of the inlet and the outlet of the boost compressor on the basis of the temperature difference between the inlet and the outlet of the boost compressor; and a control unit that performs feedback control by using the temperature information for feedback control such that at least one of an inlet temperature and an outlet temperature of the boost compressor approaches a setting value.Type: GrantFiled: October 21, 2014Date of Patent: November 5, 2019Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Akihiko Saito, Takashi Sonoda, Tetsuya Yabe, Satoko Fujii, Kazuya Higashi
-
Publication number: 20190003394Abstract: A gas turbine cooling system includes: a cooling air line that guides compressed air compressed by an air compressor to a hot part; a cooler that cools the compressed air in the cooling air line; a return line that returns cooling air in the cooling air line to an upstream side in the cooling air line; a return valve that adjusts the flow rate of the cooling air flowing through the return line; and a control device that controls the degree of opening of the return valve. The control device has a second valve command generation section that, when a reception unit receives a load rejection command, generates as a second valve command a valve command ordering the degree of opening of the return valve to be forcedly increased to a predetermined load rejection-adapted degree of opening.Type: ApplicationFiled: January 11, 2017Publication date: January 3, 2019Inventors: Satoko FUJII, Tetsuya YABE, Kazuya HIGASHI
-
Publication number: 20180372000Abstract: A gas turbine cooling system includes: a cooling air line that guides compressed air; a cooler that cools the compressed air; a flow rate adjuster that adjusts the flow rate of the cooling air; and a control device. The control device includes: a load change determination unit that determines whether a load indicated by a load command of the gas turbine has changed; a first command generation section that generates a first command indicating such an operation amount of the flow rate adjuster as allows the flow rate of the cooling air to meet a target flow rate; and a second command generation section that, when it is determined that the load indicated by the load command has changed, generates a second command indicating such an operation amount of the flow rate adjuster as allows a change-adapted flow rate higher than the target flow rate to be met.Type: ApplicationFiled: December 6, 2016Publication date: December 27, 2018Inventors: Satoko FUJII, Tetsuya YABE, Kazuya HIGASHI
-
Publication number: 20160237910Abstract: A temperature control device includes a temperature difference calculation unit that calculates a temperature difference between an inlet and an outlet of a boost compressor on the basis of a pressure ratio of the inlet and the outlet of the boost compressor and an IGV opening degree of the boost compressor, the boost compressor outputting cooling air obtained by cooling compressed air from a compressor to a cooling target; a temperature information calculation unit that calculates temperature information for feedback control for at least one of the inlet and the outlet of the boost compressor on the basis of the temperature difference between the inlet and the outlet of the boost compressor; and a control unit that performs feedback control by using the temperature information for feedback control such that at least one of an inlet temperature and an outlet temperature of the boost compressor approaches a setting value.Type: ApplicationFiled: October 21, 2014Publication date: August 18, 2016Inventors: Akihiko Saito, Takashi Sonoda, Tetsuya Yabe, Satoko Fujii, Kazuya Higashi
-
Patent number: 9347377Abstract: 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: GrantFiled: October 27, 2011Date of Patent: May 24, 2016Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Masayuki Murakami, Kazuya Higashi, Yukimasa Nakamoto, Satoko Fujii, Takeyuki Shimizu, Keigo Matsumoto
-
Publication number: 20150354467Abstract: A gas turbine is provided with a combustor having a pilot nozzle, a first main nozzle, and a second main nozzle. A combustor control device has a load interruption detector which detects load interruption of the gas turbine, a pilot nozzle flow rate control unit which increases the amount of premixed fuel supplied to the pilot nozzle, based on the detection of the load interruption, a first main nozzle flow rate control unit which reduces the amount of premixed fuel supplied to the first main nozzles, based on the detection of the load interruption, and a second main nozzle flow rate control unit which reduces the amount of premixed fuel supplied to the second main nozzles to a predetermined amount, based on the detection of the load interruption, and then further reduces the amount of premixed fuel supplied after the elapse of a predetermined time.Type: ApplicationFiled: February 18, 2014Publication date: December 10, 2015Inventors: Makoto KISHI, Takashi SONODA, Shinya UCHIDA, Sosuke NAKAMURA, Yoshikazu MATSUMURA, Satoko FUJII, Tetsuya YABE, Ryoichi HAGA
-
Publication number: 20130091824Abstract: The invention provides a gas-turbine fuel nozzle (1) that includes a plurality of fuel supply channels (3a) to which fuel is supplied, a plurality of fuel/scavenging-fluid supply channels (3b) to which fuel or a scavenging fluid for scavenging the fuel is supplied, and a plurality of injection holes (7a, 7b) that are provided at downstream ends of the fuel supply channels (3a) or the fuel/scavenging-fluid supply channels (3b) and that inject the fuel guided from the fuel supply channels (3a) or the fuel/scavenging-fluid supply channels (3b); a scavenging-fluid supply channel (21) that is connected to the fuel/scavenging-fluid supply channels (3b) to guide the scavenging fluid; and scavenging-fluid cooling means (23) for cooling the scavenging fluid to a temperature lower than a self-ignition temperature of the fuel.Type: ApplicationFiled: October 27, 2011Publication date: April 18, 2013Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Masayuki Murakami, Kazuya Higashi, Yukimasa Nakamoto, Satoko Fujii, Takeyuki Shimizu, Keigo Matsumoto
-
Patent number: 7997084Abstract: A gasifying furnace gasifies solid fuel or liquid fuel. A gas turbine drives a turbine to generate power by using combustion gas generated by burning mixed gas of compressed air compressed in a compressor and gas generated in the gasifying furnace in a combustor. A booster boosts compressed air bled from the compressor, and feed the compressed air to the gasifying furnace. A bleed source valve is provided in a bleed line between the compressor and the booster. An abnormality stop controller stops the booster and the gas turbine, based on an opening angle of the bleed source valve or a bleed pressure on an upstream side of the bleed source valve.Type: GrantFiled: December 14, 2006Date of Patent: August 16, 2011Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Satoru Kamohara, Akihiko Saito, Takashi Sonada, Yasuhiro Takashima, Satoko Fujii
-
Patent number: 7797921Abstract: A control apparatus of an extracted air booster system of an integrated gasification combined cycle power plant can additionally serve a sufficient pressure control function and a sufficient antisurge control function. For example, when an inlet guide vane is fully closed or has a small opening degree equal to or smaller than a predetermined opening degree, a second control section of the control apparatus performs pressure control based on a pressure deviation, instead of or as well as antisurge control. In the pressure control, the degree of opening of an antisurge valve is controlled so that a booster outlet pressure detection value can become equal to a set pressure value. In a case where a pressure ratio is larger than a set pressure ratio value, it is also effective that the second control section performs the antisurge control even when the inlet guide vane is fully closed.Type: GrantFiled: November 29, 2006Date of Patent: September 21, 2010Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Takashi Sonoda, Masaaki Yamasaki, Satoko Fujii, Kiyoshi Tarumizu
-
Publication number: 20070193249Abstract: Air bled from an air compressor of a gas turbine is taken into a booster via an inlet guide vane. Air compressed by the booster is supplied to a gasifier via an air supply valve. An air pressure controller controls the opening of the inlet guide vane by feedback control and, when a gasifier load command changes, priorly controls the opening of the inlet guide vane immediately in response to this change.Type: ApplicationFiled: January 30, 2007Publication date: August 23, 2007Applicant: Mitsubishi Heavy Industries, Ltd.Inventors: Yasuhiro Takashima, Satoko Fujii
-
Publication number: 20070151256Abstract: A gasifying furnace gasifies solid fuel or liquid fuel. A gas turbine drives a turbine to generate power by using combustion gas generated by burning mixed gas of compressed air compressed in a compressor and gas generated in the gasifying furnace in a combustor. A booster boosts compressed air bled from the compressor, and feed the compressed air to the gasifying furnace. A bleed source valve is provided in a bleed line between the compressor and the booster. An abnormality stop controller stops the booster and the gas turbine, based on an opening angle of the bleed source valve or a bleed pressure on an upstream side of the bleed source valve.Type: ApplicationFiled: December 14, 2006Publication date: July 5, 2007Applicant: Mitsubishi Heavy Industries, Ltd.Inventors: Satoru Kamohara, Akihiko Saito, Takashi Sonoda, Yasuhiro Takashima, Satoko Fujii
-
Publication number: 20070125064Abstract: Provided is a control apparatus of an extracted air booster system of an integrated gasification combined cycle power plant, which control apparatus can additionally serve a sufficient pressure control function and a sufficient antisurge control function. For example, when an inlet guide vane is fully closed or has a small opening degree equal to or smaller than a predetermined opening degree, a second control section of the control apparatus of an extracted air booster system performs pressure control based on a pressure deviation, instead of or as well as antisurge control. In the pressure control, the degree of opening of an antisurge valve is controlled so that a booster outlet pressure detection value can become equal to a set pressure value. In a case where a pressure ratio is larger than a set pressure ratio value, it is also effective that the second control section performs the antisurge control even when the inlet guide vane is fully closed.Type: ApplicationFiled: November 29, 2006Publication date: June 7, 2007Applicant: Mitsubishi Heavy Industries, Ltd.Inventors: Takashi Sonoda, Masaaki Yamasaki, Satoko Fujii, Kiyoshi Tarumizu