Patents by Inventor Tomomi Koganezawa
Tomomi Koganezawa 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: 8006499Abstract: The present invention provides a humid air turbine having a compressor, a humidificator for generating humid air by adding moisture to compressed air supplied from the compressor, a combustor, a turbine, a recuperator for effecting heat exchange between exhaust from the turbine and the humid air, an economizer for effecting heat exchange between exhaust from the recuperator and water, and a system for supplying the water heated by the economizer to the humidificator. The humid air turbine includes a temperature measurement device for measuring the temperature of gas discharged from the economizer, and a control device for adjusting the amount of moisture to be supplied to the humidificator in accordance with a temperature signal from the temperature measurement device. The present invention assures low NOx of combustor and flame stability before and after water addition to the humid air turbine.Type: GrantFiled: January 23, 2008Date of Patent: August 30, 2011Assignee: Hitachi, Ltd.Inventors: Tomomi Koganezawa, Yukinori Katagiri, Keisuke Miura
-
Publication number: 20110094239Abstract: An object of the present invention is to provide a gas turbine combustor that supports hydrogen-containing gas having a high burning velocity and is capable of performing low NOx combustion without reducing reliability of a burner. A first fuel nozzle is provided upstream of a combustion chamber and supplies fuel for activation and hydrogen-containing gas. The combustor has a primary combustion zone, a reduction zone and a secondary combustion zone. In the primary combustion zone, the fuel supplied from the first fuel nozzle is combusted under a fuel rich condition to form a burned gas containing a low concentration of oxygen. In the reduction zone, a hydrogen-containing gas is injected into the combustion chamber through a second fuel injection hole from a second fuel nozzle so that NOx generated in the primary combustion zone is reduced by an oxygen reaction of the hydrogen.Type: ApplicationFiled: August 16, 2010Publication date: April 28, 2011Applicant: Hitachi, Ltd.Inventors: Hiromi KOIZUMI, Satoshi Dodo, Hirokazu Takahashi, Tomohiro Asai, Tomomi Koganezawa, Shohei Yoshida
-
Publication number: 20110076628Abstract: This invention is directed to supply a combustor having a structure that reduces NOx emissions while maintaining combustion stability. The combustor has a chamber into which fuel and air are supplied. An air hole plate having a plurality of air holes upstream of the chamber is also disclosed, and fuel nozzles supplying fuel to the air holes of the air hole plate are further disclosed. In the combustor, a center of a chamber-side of the air hole plate is closer to the chamber than exits of outermost peripheral air holes.Type: ApplicationFiled: September 29, 2010Publication date: March 31, 2011Applicant: Hitachi, Ltd.Inventors: Keisuke MIURA, Satoshi Dodo, Kazuki Abe, Tomomi Koganezawa
-
Publication number: 20100275644Abstract: A power supply equipment (71) for natural gas liquefaction plant that supplies power to a natural gas liquefaction plant for liquefying the natural gas having impurities separated by a natural gas purification equipment (70). The power supply equipment comprises an air compressor (74); a combustion unit (75) for burning fuel with compressed air from the compressor to thereby generate a combustion gas; a gas turbine equipment (72) having a turbine rotated by the combustion gas from the combustion unit; and a cold heat source supply system (85) for, during the rated load operation of the gas turbine equipment, supplying carbon dioxide separated from the natural gas by the natural gas purification equipment to the gas turbine equipment as a cooling medium for the gas turbine equipment.Type: ApplicationFiled: January 23, 2008Publication date: November 4, 2010Inventors: Tomomi Koganezawa, Hidefumi Araki, Shinichi Higuchi, Yasuhiro Horiuchi, Mutsumi Horitsugi
-
Publication number: 20100229566Abstract: Disclosed herein is a highly-reliable two-shaft gas turbine system in which the rotational speed of a compressor exceeds its rated rotational speed when the combustion temperature during rated operation is set to the rated combustion temperature of a simple-cycle gas turbine system and in which the drive force for the compressor can be balanced with the output from a high-pressure turbine without turbine efficiency being compromised. When the rotational speed of a compressor 1 exceeds its rated rotational speed on the condition that the combustion temperature during rated operation is set to the rated combustion temperature of a simple-cycle gas turbine system, part of the working fluid that drives turbines is diverged from a flow path that guides the working fluid to gas paths and used as a coolant.Type: ApplicationFiled: February 18, 2010Publication date: September 16, 2010Inventors: Yasuo TAKAHASHI, Tomomi KOGANEZAWA, Shinichi HIGUCHI
-
Publication number: 20100050648Abstract: An object of this invention is to accelerate further mixing of a fuel and air independently of a flow rate of the fuel. A gas turbine combustor comprises: a fuel nozzle for blowing out a gas fuel; an air nozzle plate with an air nozzle for jetting out the fuel and air into a combustion chamber after the blowout of the fuel from the fuel nozzle; and an obstacle formed inside the air nozzle; wherein the obstacle causes a collision of the fuel jet blown out from the fuel nozzle, and hence causes turbulence in an airflow streaming into the air nozzle. According to the invention, mixing between the fuel and the air can be further accelerated independently of the flow rate of the fuel.Type: ApplicationFiled: August 10, 2009Publication date: March 4, 2010Inventors: Keisuke MIURA, Satoshi Dodo, Kazuhito KOYAMA, Tomomi KOGANEZAWA, Hiromi KOIZUMI
-
Publication number: 20090320438Abstract: Provided is a two-shaft gas turbine with improved reliability that improves output power and efficiency and is stably operated by establishing a balance between the driving force of a compressor and the output power of a high-pressure turbine in the case where the two-shaft gas turbine is applied to a system in which the flow rate of fluid flowing into a combustor is increased compared with a simple cycle gas turbine. A portion of working fluid driving the high-pressure turbine is allowed to flow not into the high-pressure turbine but into a low-pressure turbine.Type: ApplicationFiled: May 15, 2009Publication date: December 31, 2009Inventors: Tomomi KOGANEZAWA, Shinichi Higuchi, Yasuo Takahashi, Ryo Akiyama, Shinya Marushima
-
Publication number: 20080229755Abstract: The present invention provides a humid air turbine having a compressor, a humidificator for generating humid air by adding moisture to compressed air supplied from the compressor, a combustor, a turbine, a recuperator for effecting heat exchange between exhaust from the turbine and the humid air, an economizer for effecting heat exchange between exhaust from the recuperator and water, and a system for supplying the water heated by the economizer to the humidificator. The humid air turbine includes a temperature measurement device for measuring the temperature of gas discharged from the economizer, and a control device for adjusting the amount of moisture to be supplied to the humidificator in accordance with a temperature signal from the temperature measurement device. The present invention assures low NOx of combustor and flame stability before and after water addition to the humid air turbine.Type: ApplicationFiled: January 23, 2008Publication date: September 25, 2008Inventors: Tomomi Koganezawa, Yukinori Katagiri, Keisuke Miura
-
Patent number: 7343745Abstract: A gas turbine combustor has a combustion chamber into which fuel and air are supplied, wherein the fuel and the air are supplied into said combustion chamber as a plurality of coaxial jets.Type: GrantFiled: May 25, 2005Date of Patent: March 18, 2008Assignee: Hitachi, Ltd.Inventors: Hiroshi Inoue, Tomomi Koganezawa, Nariyoshi Kobayashi, Isao Takehara
-
Patent number: 7340881Abstract: The invention provides a gas turbine combustor in which the size of a combustor outer casing can be reduced. A transition inner duct and a transition outer duct are disposed in a main housing, inlet openings for a fluid to cool the transition inner duct are formed at ends of the transition outer duct on both sides nearer to the combustor liner and the turbine, and the transition outer duct is formed as an extraction flow passage for extracting the cooling fluid having flown in through the inlet openings to a recuperator. A partition member is also provided to prevent the fluid in the main housing and the fluid in the combustor outer casing from mixing with each other.Type: GrantFiled: December 9, 2003Date of Patent: March 11, 2008Assignee: Hitachi, Ltd.Inventors: Tomomi Koganezawa, Hiroshi Inoue, Kazuhiko Kawaike
-
Patent number: 7320175Abstract: The invention provides a production process of a gas turbine capable of being applied to various cycles. A principal part of a gas turbine is set in advance based on roughly set conditions, and the number of stages of a compressor and the number of stages of a turbine, which can provide conditions suitable for a desired cycle, are set based on the set principal part. The compressor and the turbine each having the set number of stages and included in the principal part are combined with each other to construct the gas turbine. When the set number of stages of the compressor or the turbine differs among a plurality of desired cycles, a substantially disk-shaped member having an outer periphery, which forms an inner peripheral wall of a substantially annular flow passage of the compressor or the turbine, is assembled into the cycle having a smaller number of stages so that the bearing-to-bearing distance is kept constant in the gas turbine operated in the plurality of desired cycles.Type: GrantFiled: January 29, 2004Date of Patent: January 22, 2008Assignee: Hitachi, Ltd.Inventors: Tomomi Koganezawa, Takanori Shibata, Nobuhiro Seiki, Shinya Marushima, Shinichi Higuchi, Nobuaki Kizuka, Ryou Akiyama, Masami Noda
-
Patent number: 7313919Abstract: A gas turbine combustor has a combustion chamber into which fuel and air are supplied, wherein the fuel and the air are supplied into said combustion chamber as a plurality of coaxial jets.Type: GrantFiled: February 24, 2004Date of Patent: January 1, 2008Assignee: Hitachi, Ltd.Inventors: Hiroshi Inoue, Tomomi Koganezawa, Nariyoshi Kobayashi, Isao Takehara
-
Patent number: 7251926Abstract: A plate-fin type regenerative heat exchanger is provided which can prevent clogging of a flow passage caused by a drift of liquid phase water even when compressed air contains a large amount of moisture and liquid droplets. The plate-fin type regenerative heat exchanger comprises a corrugated fin channel for heating compressed air containing liquid droplets and a corrugated fin channel to which the compressed air containing no liquid droplets is supplied. A pitch of fin members of the former corrugated fin channel is set to the Laplace length, whereby bridging of the liquid droplets between the fin members can be prevented.Type: GrantFiled: June 24, 2004Date of Patent: August 7, 2007Assignee: Hitachi, Ltd.Inventors: Takanori Shibata, Shigeo Hatamiya, Nobuhiro Seiki, Tomomi Koganezawa, Katsuhiko Sagae, Hidefumi Araki
-
Patent number: 7200998Abstract: A gas turbine combustor has a combustion chamber into which fuel and air are supplied, wherein the fuel and the air are supplied into said combustion chamber as a plurality of coaxial jets.Type: GrantFiled: May 25, 2005Date of Patent: April 10, 2007Assignee: Hitachi, Ltd.Inventors: Hiroshi Inoue, Tomomi Koganezawa, Nariyoshi Kobayashi, Isao Takehara
-
Patent number: 7188476Abstract: A gas turbine combustor has a combustion chamber into which fuel and air are supplied, wherein the fuel and the air are supplied into said combustion chamber as a plurality of coaxial jets.Type: GrantFiled: May 25, 2005Date of Patent: March 13, 2007Assignee: Hitachi, LtdInventors: Hiroshi Inoue, Tomomi Koganezawa, Nariyoshi Kobayashi, Isao Takehara
-
Patent number: 7117677Abstract: A gas turbine combustor has a combustion chamber into which fuel and air are supplied, wherein the fuel and the air are supplied into said combustion chamber as a plurality of coaxial jets.Type: GrantFiled: July 28, 2004Date of Patent: October 10, 2006Assignee: Hitachi, Ltd.Inventors: Hiroshi Inoue, Tomomi Koganezawa, Nariyoshi Kobayashi, Isao Takehara
-
Patent number: 7100359Abstract: A gas turbine installation which includes a compressor which compresses supplied air and discharges the same, a combustor which combusts the compressed air obtained from the compressor and fuel and produces combustion gas, a turbine which is driven by combustion gas provided from the combustor, a regenerative heat exchanger which heats all or a part of the compressed air being supplied from the compressor to the combustor by making use of the heat of the exhaust gas exhausted from the turbine and a plurality of water spraying devices which are provided at positions from an intake air chamber of the compressor to the outlet of low temperature side gas flow passage in the regenerative heat exchanger and is characterized in that the regenerative heat exchanger is constituted by connecting in series a plurality of heat exchangers having different heat transfer surface configurations.Type: GrantFiled: February 28, 2006Date of Patent: September 5, 2006Assignee: Hitachi, Ltd.Inventors: Takanori Shibata, Shigeo Hatamiya, Nobuhiro Seiki, Tomomi Koganezawa, Katsuhiko Sagae
-
Patent number: 7082748Abstract: A gas turbine installation which includes a compressor which compresses supplied air and discharges the same, a combustor which combusts the compressed air obtained from the compressor and fuel and produces combustion gas, a turbine which is driven by combustion gas provided from the combustor, a regenerative heat exchanger which heats all or a part of the compressed air being supplied from the compressor to the combustor by making use of the heat of the exhaust gas exhausted from the turbine and a plurality of water spraying devices which are provided at positions from an intake air chamber of the compressor to the outlet of low temperature side gas flow passage in the regenerative heat exchanger and is characterized in that the regenerative heat exchanger is constituted by connecting in series a plurality of heat exchangers having different heat transfer surface configurations.Type: GrantFiled: July 23, 2004Date of Patent: August 1, 2006Assignee: Hitachi, Ltd.Inventors: Takanori Shibata, Shigeo Hatamiya, Nobuhiro Seiki, Tomomi Koganezawa, Katsuhiko Sagae
-
Publication number: 20060144034Abstract: A gas turbine installation which includes a compressor which compresses supplied air and discharges the same, a combustor which combusts the compressed air obtained from the compressor and fuel and produces combustion gas, a turbine which is driven by combustion gas provided from the combustor, a regenerative heat exchanger which heats all or a part of the compressed air being supplied from the compressor to the combustor by making use of the heat of the exhaust gas exhausted from the turbine and a plurality of water spraying devices which are provided at positions from an intake air chamber of the compressor to the outlet of low temperature side gas flow passage in the regenerative heat exchanger and is characterized in that the regenerative heat exchanger is constituted by connecting in series a plurality of heat exchangers having different heat transfer surface configurations.Type: ApplicationFiled: February 28, 2006Publication date: July 6, 2006Inventors: Takanori Shibata, Shigeo Hatamiya, Nobuhiro Seiki, Tomomi Koganezawa, Katsuhiko Sagae
-
Publication number: 20060042264Abstract: A gas turbine combustor has a combustion chamber into which fuel and air are supplied, wherein the fuel and the air are supplied into said combustion chamber as a plurality of coaxial jets.Type: ApplicationFiled: May 25, 2005Publication date: March 2, 2006Inventors: Hiroshi Inoue, Tomomi Koganezawa, Nariyoshi Kobayashi, Isao Takehara