Patents by Inventor Bhaskar Pemmi

Bhaskar Pemmi 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).

  • Publication number: 20160273377
    Abstract: A cooling arrangement for a gas turbine engine includes a discharge channel for airflow from a compressor, a first cooling channel, and at least one aperture providing communication between the flow of air through the discharge channel and the first cooling channel. A restrictor device in the aperture regulates the flow of air between the discharge channel and the first cooling channel. The restrictor device deforms to vary air flowing through the aperture in response to a physical condition of the engine. This physical condition of the engine may be that of the temperature of air flowing through the discharge channel or the power output of the gas turbine engine. The restrictor device may be a boreplug, which may be a two-way shape memory alloy.
    Type: Application
    Filed: March 18, 2016
    Publication date: September 22, 2016
    Inventors: Sheo Narain GIRI, Sanjeev Kumar JHA, Bhaskar PEMMI, Harish BOMMANAKATTE, Santhosh DONKADA, Krishna Kishore GUMPINA, Indrajit MAZUMDER, Rajarshi SAHA
  • Patent number: 9341113
    Abstract: An attemperation system and an atomizing air system are integrated for a combined cycle turbine including a gas turbine and a steam turbine. The atomizing air system receives compressor discharge air for fuel atomization. The atomizing air system includes an atomizing air cooler that serves to cool the compressor discharge air. A heat recovery steam generator receives exhaust from the gas turbine and generates steam for input to the steam turbine via an attemperation system. A feed water circuit draws feed water from the heat recovery steam generator and communicates in a heat exchange relationship with the atomizing air cooler to heat the feed water. The feed water circuit communicates the heated feed water to the attemperation system of the heat recovery steam generator.
    Type: Grant
    Filed: October 23, 2012
    Date of Patent: May 17, 2016
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Joseph John, Raub Warfield Smith, Bhaskar Pemmi, Veerappan Muthaiah
  • Patent number: 9297310
    Abstract: A cooling arrangement for a gas turbine engine. The cooling arrangement comprises a discharge channel for air flow from a compressor, a first cooling channel and at least one aperture providing communication between the flow of air through the discharge channel and the first cooling channel. A restrictor device in the aperture regulates the flow of air between the discharge channel and the first cooling channel. The restrictor device deforms to vary air flowing through the aperture in response to a physical condition of the engine. This physical condition of the engine may be that of the temperature of air flowing through the discharge channel, the restrictor device responding to regulate the flow of air based on that temperature. The restrictor device may be a two-way shape memory alloy.
    Type: Grant
    Filed: October 18, 2012
    Date of Patent: March 29, 2016
    Assignee: General Electric Company
    Inventors: Sheo Narain Giri, Sanjeev Kumar Jha, Bhaskar Pemmi, Harish Bommanakatte, Santhosh Donkada, Krishna Kishore Gumpina, Indrajit Mazumder, Rajarshi Saha
  • Patent number: 9261022
    Abstract: A system for controlling a flow rate of a compressed cooling medium between a compressor section and a turbine section of a gas turbine includes a flow path that is defined between the compressor section and the turbine section of the gas turbine and a thermally actuated variable flow valve disposed within the flow path. The variable flow valve defines an opening that changes in size based on a temperature of the compressed cooling medium flowing therethrough.
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: February 16, 2016
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Rajarshi Saha, Santhosh Donkada, Indrajit Mazumder, Bhaskar Pemmi
  • Patent number: 9200533
    Abstract: Various embodiments include apparatuses and related methods for determining the enthalpy of steam. In some embodiments, an apparatus includes: an extraction conduit fluidly connected with a steam turbine section, the extraction conduit for obtaining wet steam from the steam turbine section; a mixing chamber fluidly connected with the extraction conduit; an injector fluidly connected with the mixing chamber, the injector for providing dry steam to the mixing chamber for mixing with the wet steam from the steam turbine section to produce a sample mixture; and an enthalpy detection system fluidly connected with the mixing chamber, the enthalpy detection system configured to determine an enthalpy of the sample mixture.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: December 1, 2015
    Assignee: General Electric Company
    Inventors: Santhosh Donkada, Indrajit Mazumder, Bhaskar Pemmi, Rajarshi Saha, Anil Kumar Sharma
  • Patent number: 9188010
    Abstract: Embodiments of the present application include a gas turbine system. The system may include a rotor wheel and one or more impeller vanes radially disposed on the rotor wheel. The system may also include one or more fluid passages defined by adjacent impeller vanes. The one or more fluid passages may be radially disposed across the rotor wheel. Moreover, the system may include one or more shape memory alloy valves disposed within each of the fluid passages. The one or more shape memory alloy valves may be configured to change shape to control a flow of fluid through the fluid passages.
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: November 17, 2015
    Assignee: General Electric Company
    Inventors: Sanjeev Kumar Jha, Sheo Narain Giri, Bhaskar Pemmi, Harish Bommanakatte, Rajesh Achudhan
  • Publication number: 20150315927
    Abstract: A gas turbine includes a compressor, a combustor, a turbine, and a generator disposed upstream of the compressor. The gas turbine also includes a heat exchange circuit with a generator cooler circuit cooperable with the generator and circulating a coolant in the generator. The heat exchange circuit also includes a water circuit circulating water in a heat exchange relationship with the generator cooler circuit. The coolant in the generator cooler circuit is cooled by the water in the water circuit.
    Type: Application
    Filed: May 1, 2014
    Publication date: November 5, 2015
    Applicant: General Electric Company
    Inventors: Joseph John, Bhaskar Pemmi, Balamurugan Sridharan
  • Publication number: 20150315970
    Abstract: A heat exchange circuit in a gas turbine includes an evaporative cooling medium circuit circulating an exchange medium, and a cooling source containing fuel. The cooling source is coupled with a supply line in a heat exchange relationship with the evaporative cooling medium circuit. The exchange medium is cooled by the fuel in the supply line, and the evaporative cooling medium circuit directs the cooled exchange medium through the evaporative cooler. The fuel is heated by the evaporative cooling medium circuit, and the supply line directs the heated fuel to the one or more combustors of the gas turbine. The cooler turbine inlet air results in increased baseload output.
    Type: Application
    Filed: April 30, 2014
    Publication date: November 5, 2015
    Applicant: General Electric Company
    Inventors: Joseph John, Bhaskar Pemmi, Veerappan Muthaiah
  • Patent number: 9103285
    Abstract: A purge system and liquid fuel atomizing system, a system including a purge system and liquid fuel atomizing system, and a method of purging and atomizing are disclosed. The purging involves a first nozzle, a second nozzle, a third nozzle, and a staged compression system having a first stage and a second stage. The first stage is configured to selectively direct a first pressurized fluid stream to the first nozzle and the second nozzle. The second stage is configured to selectively direct a second pressurized fluid stream to the third nozzle.
    Type: Grant
    Filed: January 3, 2011
    Date of Patent: August 11, 2015
    Assignee: General Electric Company
    Inventors: Venugopala Raju, Anil Kumar Sharma, Indrajit Mazumder, Bhaskar Pemmi, Rajarshi Saha
  • Publication number: 20140140806
    Abstract: Various embodiments include apparatuses and related methods for determining the enthalpy of steam. In some embodiments, an apparatus includes: an extraction conduit fluidly connected with a steam turbine section, the extraction conduit for obtaining wet steam from the steam turbine section; a mixing chamber fluidly connected with the extraction conduit; an injector fluidly connected with the mixing chamber, the injector for providing dry steam to the mixing chamber for mixing with the wet steam from the steam turbine section to produce a sample mixture; and an enthalpy detection system fluidly connected with the mixing chamber, the enthalpy detection system configured to determine an enthalpy of the sample mixture.
    Type: Application
    Filed: November 19, 2012
    Publication date: May 22, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Santhosh Donkada, Indrajit Mazumder, Bhaskar Pemmi, Rajarshi Saha, Anil Kumar Sharma
  • Publication number: 20140130478
    Abstract: A gas turbomachine includes a compressor portion, a turbine portion operatively connected to the compressor portion, a combustor assembly including at least one combustor fluidically connected to the turbine portion, and an accessory mechanically linked with and driven by the turbine portion. The gas turbomachine also includes a fuel pre-heat system including a fuel pre-heat element having a fuel circuit fluidically connected to the at least one combustor arranged in a heat exchange relationship with a heating medium circuit fluidically connected to at least one of the compressor portion, the turbine portion, and the accessory.
    Type: Application
    Filed: November 9, 2012
    Publication date: May 15, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Bhaskar Pemmi, Joseph John, Indrajit Mazumder
  • Publication number: 20140123623
    Abstract: A gas turbomachine system includes a compressor portion including an inlet portion, a turbine portion fluidically connected to, and mechanically linked with, the compressor portion, and a combustor assembly including at least one combustor fluidically connected to the turbine portion. An inlet system is fluidically connected to the inlet portion of the compressor portion. The inlet system includes an inlet chiller. An inlet chiller condensate recovery system is fluidically connected to the inlet system. The inlet chiller condensate recovery system includes an inlet fluidically connected to the inlet chiller and an outlet fluidically connected to one of the compressor portion and the combustor assembly.
    Type: Application
    Filed: November 8, 2012
    Publication date: May 8, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Joseph John, Indrajit Mazumder, Bhaskar Pemmi
  • Publication number: 20140110092
    Abstract: An attemperation system and an atomizing air system are integrated for a combined cycle turbine including a gas turbine and a steam turbine. The atomizing air system receives compressor discharge air for fuel atomization. The atomizing air system includes an atomizing air cooler that serves to cool the compressor discharge air. A heat recovery steam generator receives exhaust from the gas turbine and generates steam for input to the steam turbine via an attemperation system. A feed water circuit draws feed water from the heat recovery steam generator and communicates in a heat exchange relationship with the atomizing air cooler to heat the feed water. The feed water circuit communicates the heated feed water to the attemperation system of the heat recovery steam generator.
    Type: Application
    Filed: October 23, 2012
    Publication date: April 24, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Joseph John, Raub Warfield Smith, Bhaskar Pemmi, Veerappan Muthaiah
  • Publication number: 20140109580
    Abstract: A cooling arrangement for a gas turbine engine. The cooling arrangement comprises a discharge channel for air flow from a compressor, a first cooling channel and at least one aperture providing communication between the flow of air through the discharge channel and the first cooling channel. A restrictor device in the aperture regulates the flow of air between the discharge channel and the first cooling channel. The restrictor device deforms to vary air flowing through the aperture in response to a physical condition of the engine. This physical condition of the engine may be that of the temperature of air flowing through the discharge channel, the restrictor device responding to regulate the flow of air based on that temperature. The restrictor device may be a two-way shape memory alloy.
    Type: Application
    Filed: October 18, 2012
    Publication date: April 24, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Sheo Narain GIRI, Sanjeev Kumar JHA, Bhaskar PEMMI, Harish BOOMANAKATTE, Santhosh DONKADA, Krishna Kishore GUMPINA, Indrajit MAZUMDER, Rajarshi SAHA
  • Patent number: 8631660
    Abstract: The present application and the resultant patent provide an integrated gasification combined cycle system. The integrated gasification combined cycle system may include a gas turbine engine, one or more power plant components, one or more carbon dioxide compressors, and a vapor absorption chiller. The vapor absorption chiller is driven by a waste heat source flow from the carbon dioxide compressors to produce a chilling medium flow to cool the power plant components.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: January 21, 2014
    Assignee: General Electric Company
    Inventors: Bhaskar Pemmi, Anil Kumar Sharma, Rajarshi Saha, Indrajit Mazumder, Qiong Zhou, Christopher Michael Robbins, Paul Roberts Scarboro, Ann Verwilst Driscoll
  • Publication number: 20130343868
    Abstract: Embodiments of the present application include a gas turbine system. The system may include a rotor wheel and one or more impeller vanes radially disposed on the rotor wheel. The system may also include one or more fluid passages defined by adjacent impeller vanes. The one or more fluid passages may be radially disposed across the rotor wheel. Moreover, the system may include one or more shape memory alloy valves disposed within each of the fluid passages. The one or more shape memory alloy valves may be configured to change shape to control a flow of fluid through the fluid passages.
    Type: Application
    Filed: June 25, 2012
    Publication date: December 26, 2013
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Sanjeev Kumar Jha, Sheo Narain Giri, Bhaskar Pemmi, Harish Bommanakatte, Rajesh Achudhan
  • Publication number: 20120240603
    Abstract: The present application and the resultant patent provide an integrated gasification combined cycle system. The integrated gasification combined cycle system may include a gas turbine engine, one or more power plant components, one or more carbon dioxide compressors, and a vapor absorption chiller. The vapor absorption chiller is driven by a waste heat source flow from the carbon dioxide compressors to produce a chilling medium flow to cool the power plant components.
    Type: Application
    Filed: March 23, 2011
    Publication date: September 27, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Bhaskar Pemmi, Anil Kumar Sharma, Rajarshi Saha, Indrajit Mazumder, Qiong Zhou, Christopher Michael Robbins, Paul Roberts Scarboro, Ann Verwilst Driscoll
  • Publication number: 20120167545
    Abstract: A purge system and liquid fuel atomizing system, a system including a purge system and liquid fuel atomizing system, and a method of purging and atomizing are disclosed. The purging involves a first nozzle, a second nozzle, a third nozzle, and a staged compression system having a first stage and a second stage. The first stage is configured to selectively direct a first pressurized fluid stream to the first nozzle and the second nozzle. The second stage is configured to selectively direct a second pressurized fluid stream to the third nozzle.
    Type: Application
    Filed: January 3, 2011
    Publication date: July 5, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Venugopala Durwasula RAJU, Anil Kumar SHARMA, Indrajit MAZUMDER, Bhaskar PEMMI, Rajarshi SAHA
  • Publication number: 20120167577
    Abstract: A gas turbine system and process include a compressor component configured to compress fluid to form a compressed fluid stream, a combustor configured to receive at least a first portion of the compressed fluid stream and at least partially combust a syngas to form a combustor discharge stream, and a turbine component positioned to receive the combustor discharge stream and to form a turbine component stream. In the system and process, a cool stream directed from a second system cools the turbine component stream.
    Type: Application
    Filed: January 3, 2011
    Publication date: July 5, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Bhaskar PEMMI, Anil Kumar SHARMA, Rajarshi SAHA, Indrajit MAZUMDER
  • Publication number: 20120009075
    Abstract: Systems for efficiently compressing a gas are included. In one embodiment, a system includes a carbonous gas compression system and a vapor absorption chiller (VAC). The carbonous gas compression system comprises a compressor configured to compress the carbonous gas. The VAC is configured to circulate a coolant through at least one coolant path through the carbonous gas compression system. Utilization of the VAC may aid in cooling the carbonous gas, which may allow for less energy to be expended by the compression system.
    Type: Application
    Filed: July 6, 2010
    Publication date: January 12, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Rajeshkumar Ravikumar, Indrajit Mazumder, Bhaskar Pemmi, Anil Kumar Sharma