Patents by Inventor Yoshitaka Hirata
Yoshitaka Hirata 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).
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Publication number: 20120047897Abstract: In a gas turbine combustor, mixing of a fuel and air is accelerated in a mixing chamber of a burner as well as in air introduction passages provided in a wall of the mixing chamber, whereby NOx emissions from premixed combustion are reduced while at the same time, ignition characteristics and flame propagation characteristics improve. The gas turbine combustor includes a plurality of combustors 10, a spark plug 13, and a cross-fire tube 15 that propagates a flame between the combustors 10. Each combustor 10 includes the burner 30 equipped with a fuel nozzle and the mixing chamber wall 32 forming the mixing chamber 31. A plurality of air introduction holes 35, 36 for introducing combustion air, along with the fuel from the fuel nozzle, into the mixing chamber 31, are provided in the mixing chamber wall 32.Type: ApplicationFiled: August 18, 2011Publication date: March 1, 2012Applicant: Hitachi, Ltd.Inventors: Yoshitaka HIRATA, Shohei Yoshida, Tatsuya Sekiguchi, Akinori Hayashi
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Patent number: 8082724Abstract: The present invention improves the reliability of a combusting system including multiple combustors and improves an environmental performance thereof. The invention includes a device that delays the start time of fuel injection from a fuel nozzle of a combustor including a ignitor from the start time of fuel injection from a fuel nozzle of the combustor not including the ignitor.Type: GrantFiled: November 25, 2008Date of Patent: December 27, 2011Assignee: Hitachi, Ltd.Inventors: Yoshitaka Hirata, Shohei Yoshida, Tatsuya Sekiguchi, Hiroshi Inoue
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Patent number: 8047003Abstract: A combustor comprises a liquid fuel nozzle for injecting liquid fuel to a combustion chamber, and an air supply nozzle disposed around the liquid fuel nozzle and injecting air. The air supply nozzle is disposed such that air is injected from the air supply nozzle in a direction toward an axis of the liquid fuel nozzle. A space is formed around an outlet of the liquid fuel nozzle, through which the liquid fuel is injected from the liquid fuel nozzle to the combustion chamber, upstream of a distal end of the outlet in a direction in which the liquid fuel is injected. Carbonaceous deposits on surrounding surfaces of the outlet of the liquid fuel nozzle can be suppressed regardless of the operating conditions of a combustor.Type: GrantFiled: September 28, 2010Date of Patent: November 1, 2011Assignee: Hitachi, Ltd.Inventors: Shouhei Yoshida, Yoshitaka Hirata, Hiroshi Inoue, Tomoya Murota, Toshifumi Sasao, Akinori Hayashi, Isao Takehara
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Patent number: 7891191Abstract: A combustor comprises a liquid fuel nozzle for injecting liquid fuel to a combustion chamber, and an air supply nozzle disposed around the liquid fuel nozzle and injecting air. The air supply nozzle is disposed such that air is injected from the air supply nozzle in a direction toward an axis of the liquid fuel nozzle. A space is formed around an outlet of the liquid fuel nozzle, through which the liquid fuel is injected from the liquid fuel nozzle to the combustion chamber, upstream of a distal end of the outlet in a direction in which the liquid fuel is injected. Carbonaceous deposits on surrounding surfaces of the outlet of the liquid fuel nozzle can be suppressed regardless of the operating conditions of a combustor.Type: GrantFiled: August 24, 2005Date of Patent: February 22, 2011Assignee: Hitachi, Ltd.Inventors: Shouhei Yoshida, Yoshitaka Hirata, Hiroshi Inoue, Tomoya Murota, Toshifumi Sasao, Akinori Hayashi, Isao Takehara
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Publication number: 20110011092Abstract: A combustor comprises a liquid fuel nozzle for injecting liquid fuel to a combustion chamber, and an air supply nozzle disposed around the liquid fuel nozzle and injecting air. The air supply nozzle is disposed such that air is injected from the air supply nozzle in a direction toward an axis of the liquid fuel nozzle. A space is formed around an outlet of the liquid fuel nozzle, through which the liquid fuel is injected from the liquid fuel nozzle to the combustion chamber, upstream of a distal end of the outlet in a direction in which the liquid fuel is injected. Carbonaceous deposits on surrounding surfaces of the outlet of the liquid fuel nozzle can be suppressed regardless of the operating conditions of a combustor.Type: ApplicationFiled: September 28, 2010Publication date: January 20, 2011Inventors: Shouhei YOSHIDA, Yoshitaka Hirata, Hiroshi Inoue, Tomoya Murota, Toshifumi Sasao, Akinori Hayashi, Isao Takehara
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Publication number: 20100170248Abstract: A combustor and a combustion method for the combustor, which can suppress backfire and ensure stable combustion. The combustor comprises a mixing-chamber forming member for forming therein a mixing chamber in which air for combustion and fuel are mixed with each other, and a combustion chamber for burning a gas mixture mixed in the mixing chamber and producing combustion gases. A channel for supplying the air for combustion to the mixing chamber from the outer peripheral side of the mixing-chamber forming member is provided inside the mixing-chamber forming member. The fuel and the air are premixed in the channel, and a resulting premixed gas mixture is supplied to the mixing chamber.Type: ApplicationFiled: October 1, 2009Publication date: July 8, 2010Inventors: Shouhei YOSHIDA, Yoshitaka Hirata, Hiroshi Inoue, Tomoya Murota, Toshifumi Sasao, Nariyoshi Kobayashi
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Patent number: 7700185Abstract: There is provided an insulation material having a dielectric constant of 10 or more, comprising a filler having a dielectric constant of 50 or more and having two peaks in different particle size ranges in a particle size distribution and an insulating resin combined with each other; an insulation material having a dielectric constant of 10 or more comprising, as essential components, 1) at least one filler selected from the group consisting of barium titanate, strontium titanate, potassium titanate, magnesium titanate, lead titanate, titanium dioxide, barium zirconate, calcium zirconate and lead zirconate, 2) an insulating resin and 3) a dispersant containing a carboxylic group; or an insulation material comprising a filler having a dielectric constant of 50 or more, a dispersant for dispersing the filler and an insulating resin as essential components, wherein an extract of a cured product of the insulation material obtained by extraction with water at 120° C.Type: GrantFiled: May 19, 2004Date of Patent: April 20, 2010Assignee: Hitachi Chemical Company, Ltd.Inventors: Yasushi Kumashiro, Yoshitaka Hirata, Shin Takanezawa, Yasushi Shimada, Kazuhisa Otsuka, Hiroyuki Kuriya, Kazunori Yamamoto
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Patent number: 7673455Abstract: A gas turbine combustor includes a liquid fuel nozzle for jetting out liquid fuel; a pre-mixture chamber wall provided with the liquid fuel nozzle at a center thereof, having a hollow conical shape gradually spreading in the direction in which the fuel is jetted out, and defining a pre-mixture chamber therein; a plurality of air inlet holes bored through the pre-mixture chamber wall and introducing the combustion air to the pre-mixture chamber such that angles at which the combustion air is introduced to the pre-mixture chamber through the air inlet holes are deflected at least toward the circumferential direction of the pre-mixture chamber wall; and a plurality of gaseous fuel nozzles disposed around the pre-mixture chamber wall in an opposing relation respectively to the plurality of air inlet holes and jetting out gaseous fuel substantially coaxially with axes of the air inlet holes.Type: GrantFiled: March 28, 2008Date of Patent: March 9, 2010Assignee: Hitachi, Ltd.Inventors: Shouhei Yoshida, Yoshitaka Hirata, Kazuyuki Itou, Tomoya Murota, Hiroshi Inoue, Tomohiro Asai
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Publication number: 20100000218Abstract: A gas turbine combustor for mixing fuel into combustion air introduced from a compressor, burning an air-fuel mixture, and supplying produced combustion gas to a gas turbine. The combustor has a liquid fuel nozzle for jetting out liquid fuel and a pre-mixture chamber wall having a hollow conical shape gradually spreading in the direction in which the fuel is jetted out from the liquid fuel nozzle, and defining a pre-mixture chamber therein. A plurality of gaseous fuel nozzles are disposed around the pre-mixture chamber wall in an opposing relation respectively to a plurality of air inlet holes bored through the pre-mixture chamber wall and jet out gaseous fuel substantially coaxially with the axes of the air inlet holes.Type: ApplicationFiled: July 7, 2009Publication date: January 7, 2010Applicant: HITACHI, LTD.Inventors: Shouhei Yoshida, Yoshitaka Hirata, Kazuyuki Itou, Tomoya Murota, Hiroshi Inoue, Tomohiro Asai
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Patent number: 7610759Abstract: A combustor and a combustion method for the combustor, which can suppress backfire and ensure stable combustion. The combustor comprises a mixing-chamber forming member for forming therein a mixing chamber in which air for combustion and fuel are mixed with each other, and a combustion chamber for burning a gas mixture mixed in the mixing chamber and producing combustion gases. A channel for supplying the air for combustion to the mixing chamber from the outer peripheral side of the mixing-chamber forming member is provided inside the mixing-chamber forming member. The fuel and the air are premixed in the channel, and a resulting premixed gas mixture is supplied to the mixing chamber.Type: GrantFiled: October 4, 2005Date of Patent: November 3, 2009Assignee: Hitachi, Ltd.Inventors: Shouhei Yoshida, Yoshitaka Hirata, Hiroshi Inoue, Tomoya Murota, Toshifumi Sasao, Nariyoshi Kobayashi
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Patent number: 7592250Abstract: A multilayer wiring board exhibiting excellent moldability and having a capacitor where variation of capacitance is suppressed, its producing method, a semiconductor device mounting a semiconductor chip on the multilayer wiring board, and a wireless electronic device mounting the semiconductor device.Type: GrantFiled: January 16, 2007Date of Patent: September 22, 2009Assignee: Hitachi Chemical Company, Ltd.Inventors: Yasushi Shimada, Yoshitaka Hirata, Hiroyuki Kuriya, Kazuhisa Otsuka, Masanori Yamaguchi, Yuichi Shimayama, Ken Madarame, Etsuo Mizushima, Yuusuke Kondou, Kazunori Yamamoto
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Patent number: 7581379Abstract: The plant includes a gaseous fuel processing apparatus for pre-processing natural gas (gaseous fuel) produced in the gas field, a liquid fuel processing apparatus for pre-processing liquid fuel obtained during the extraction and refining process of the natural gas, and a gas turbine. The gas turbine includes a compressor for generating compressed air, a combustor for mixing the compressed air from the compressor with one or both of the gaseous fuel pre-processed by the gaseous fuel processing apparatus and the liquid fuel pre-processed by the liquid fuel processing apparatus, and for burning a gas mixture, and a turbine for driving a generator by combustion gases supplied from the combustor.Type: GrantFiled: November 3, 2005Date of Patent: September 1, 2009Assignee: Hitachi, Ltd.Inventors: Shouhei Yoshida, Yoshitaka Hirata, Hiroshi Inoue, Nariyoshi Kobayashi
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Patent number: 7571609Abstract: A gas turbine combustor includes a liquid fuel nozzle for jetting out liquid fuel; a pre-mixture chamber wall provided with the liquid fuel nozzle at a center thereof, having a hollow conical shape gradually spreading in the direction in which the fuel is jetted out, and defining a pre-mixture chamber therein; a plurality of air inlet holes bored through the pre-mixture chamber wall and introducing the combustion air to the pre-mixture chamber such that angles at which the combustion air is introduced to the pre-mixture chamber through the air inlet holes are deflected at least toward the circumferential direction of the pre-mixture chamber wall; and a plurality of gaseous fuel nozzles disposed around the pre-mixture chamber wall in an opposing relation respectively to the plurality of air inlet holes and jetting out gaseous fuel substantially coaxially with axes of the air inlet holes.Type: GrantFiled: March 28, 2008Date of Patent: August 11, 2009Assignee: Hitachi, Ltd.Inventors: Shouhei Yoshida, Yoshitaka Hirata, Kazuyuki Itou, Tomoya Murota, Hiroshi Inoue, Tomohiro Asai
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Patent number: 7571612Abstract: A gas turbine combustor includes a liquid fuel nozzle for jetting out liquid fuel; a pre-mixture chamber wall provided with the liquid fuel nozzle at a center thereof, having a hollow conical shape gradually spreading in the direction in which the fuel is jetted out, and defining a pre-mixture chamber therein; a plurality of air inlet holes bored through the pre-mixture chamber wall and introducing the combustion air to the pre-mixture chamber such that angles at which the combustion air is introduced to the pre-mixture chamber through the air inlet holes are deflected at least toward the circumferential direction of the pre-mixture chamber wall; and a plurality of gaseous fuel nozzles disposed around the pre-mixture chamber wall in an opposing relation respectively to the plurality of air inlet holes and jetting out gaseous fuel substantially coaxially with axes of the air inlet holes.Type: GrantFiled: March 28, 2008Date of Patent: August 11, 2009Assignee: Hitachi, Ltd.Inventors: Shouhei Yoshida, Yoshitaka Hirata, Kazuyuki Itou, Tomoya Murota, Hiroshi Inoue, Tomohiro Asai
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Publication number: 20090173057Abstract: The plant includes a gaseous fuel processing apparatus for pre-processing natural gas (gaseous fuel) produced in the gas field, a liquid fuel processing apparatus for pre-processing liquid fuel obtained during the extraction and refining process of the natural gas, and a gas turbine. The gas turbine includes a compressor for generating compressed air, a combustor for mixing the compressed air from the compressor with one or both of the gaseous fuel pre-processed by the gaseous fuel processing apparatus and the liquid fuel pre-processed by the liquid fuel processing apparatus, and for burning a gas mixture, and a turbine for driving a generator by combustion gases supplied from the combustor.Type: ApplicationFiled: November 3, 2005Publication date: July 9, 2009Inventors: Shouhei Yoshida, Yoshitaka Hirata, Hiroshi Inoue, Nariyoshi Kobayashi
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Publication number: 20090139241Abstract: The present invention improves the reliability of a combusting system including multiple combustors and improves an environmental performance thereof. The invention includes a device that delays the start time of fuel injection from a fuel nozzle of a combustor including a ignitor from the start time of fuel injection from a fuel nozzle of the combustor not including the ignitor.Type: ApplicationFiled: November 25, 2008Publication date: June 4, 2009Inventors: Yoshitaka HIRATA, Shohei Yoshida, Tatsuya Sekiguchi, Hiroshi Inoue
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Patent number: 7426833Abstract: A gas turbine combustor includes a liquid fuel nozzle for jetting out liquid fuel; a pre-mixture chamber wall provided with the liquid fuel nozzle at a center thereof, having a hollow conical shape gradually spreading in the direction in which the fuel is jetted out, and defining a pre-mixture chamber therein; a plurality of air inlet holes bored through the pre-mixture chamber wall and introducing the combustion air to the pre-mixture chamber such that angles at which the combustion air is introduced to the pre-mixture chamber through the air inlet holes are deflected at least toward the circumferential direction of the pre-mixture chamber wall; and a plurality of gaseous fuel nozzles disposed around the pre-mixture chamber wall in an opposing relation respectively to the plurality of air inlet holes and jetting out gaseous fuel substantially coaxially with axes of the air inlet holes.Type: GrantFiled: June 17, 2004Date of Patent: September 23, 2008Assignee: Hitachi, Ltd.Inventors: Shouhei Yoshida, Yoshitaka Hirata, Kazuyuki Itou, Tomoya Murota, Hiroshi Inoue, Tomohiro Asai
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Publication number: 20080209909Abstract: A gas turbine combustor includes a liquid fuel nozzle for jetting out liquid fuel, a pre-mixture chamber wall provided with the liquid fuel nozzle at a center thereof, having a hollow conical shape gradually spreading in the direction in which the fuel is jetted out and defining a pre-mixture chamber therein; a plurality of air inlet holes bored through the pre-mixture chamber wall and introducing the combustion air to the pre-mixture chamber such that angles at which the combustion air is introduced to the pre-mixture chamber through the air inlet holes are deflected at least toward the circumferential direction of the pre-mixture chamber wall; and a plurality of gaseous fuel nozzles disposed around the pre-mixture chamber wall in an opposing relation respectively to the plurality of air inlet holes and jetting out gaseous fuel substantially coaxially with axes of the air inlet holes.Type: ApplicationFiled: March 28, 2008Publication date: September 4, 2008Inventors: Shouhei Yoshida, Yoshitaka Hirata, Kazuyuki Itou, Tomoya Murota, Hiroshi Inoue, Tomohiro Asai
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Publication number: 20080190113Abstract: A gas turbine combustor includes a liquid fuel nozzle for jetting out liquid fuel; a pre-mixture chamber wall provided with the liquid fuel nozzle at a center thereof having a hollow conical shape gradually spreading in the direction in which the fuel is jetted out, and defining a pre-mixture chamber therein; a plurality of air inlet holes bored through the pre-mixture chamber wall and introducing the combustion air to the pre-mixture chamber such that angles at which the combustion air is introduced to the pre-mixture chamber through the air inlet holes are deflected at least toward the circumferential direction of the pre-mixture chamber wall; and a plurality of gaseous fuel nozzles disposed around the pre-mixture chamber wall in an opposing relation respectively to the plurality of air inlet holes and jetting out gaseous fuel substantially coaxially with axes of the air inlet holes.Type: ApplicationFiled: March 28, 2008Publication date: August 14, 2008Inventors: Shouhei Yoshida, Yoshitaka Hirata, Kazuyuki Itou, Tomoya Murota, Hiroshi Inoue, Tomohiro Asai
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Publication number: 20080190112Abstract: A gas turbine combustor includes a liquid fuel nozzle for jetting out liquid fuel; a pre-mixture chamber wall provided with the liquid fuel nozzle at a center thereof, having a hollow conical shape gradually spreading in the direction in which the fuel is jetted out, and defining a pre-mixture chamber therein; a plurality of air inlet holes bored through the pre-mixture chamber wall and introducing the combustion air to the pre-mixture chamber such that angles at which the combustion air is introduced to the pre-mixture chamber through the air inlet holes are deflected at least toward the circumferential direction of the pre-mixture chamber wall; and a plurality of gaseous fuel nozzles disposed around the pre-mixture chamber wall in an opposing relation respectively to the plurality of air inlet holes and jetting out gaseous fuel substantially coaxially with axes of the air inlet holes.Type: ApplicationFiled: March 28, 2008Publication date: August 14, 2008Inventors: Shouhei Yoshida, Yoshitaka Hirata, Kazuyuki Itou, Tomoya Murota, Hiroshi Inoue, Tomohiro Asai