Patents by Inventor Indresh Rampall

Indresh Rampall 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: 10472996
    Abstract: An autonomous self-powered system for cooling radioactive materials comprising: a pool of liquid; a closed-loop fluid circuit comprising a working fluid having a boiling temperature that is less than a boiling temperature of the liquid of the pool, the closed-loop fluid circuit comprising, in operable fluid coupling, an evaporative heat exchanger at least partially immersed in the liquid of the pool, a turbogenerator, and a condenser; one or more forced flow units operably coupled to the closed-loop fluid circuit to induce flow of the working fluid through the closed-loop fluid circuit; and the closed-loop fluid circuit converting thermal energy extracted from the liquid of the pool into electrical energy in accordance with the Rankine Cycle, the electrical energy powering the one or more forced flow units.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: November 12, 2019
    Assignee: HOLTEC INTERNATIONAL
    Inventors: Krishna P. Singh, Indresh Rampall, Joseph Rajkumar
  • Publication number: 20190283191
    Abstract: A vertical bundle air-cooled heat exchanger. In one embodiment, the invention can be a vertical bundle air-cooled condenser comprising: at least one tube bundle assembly comprising: a tube bundle comprising a plurality of finned tubes arranged in a substantially vertical and side-by-side orientation, each of the plurality of finned tubes comprising a cavity; a top header pipe comprising an inlet header cavity operably coupled to a source of steam; a bottom header pipe comprising an outlet header cavity for collecting condensate; top ends of the plurality of finned tubes coupled to the top header pipe and the bottom ends of the plurality of finned tubes coupled to the bottom header pipe; and a shell having an open top end and open bottom end, the at least one tube bundle assembly positioned within the shell.
    Type: Application
    Filed: June 5, 2019
    Publication date: September 19, 2019
    Inventors: Krishna P. Singh, Indresh Rampall, Joseph Gerald Leo Rajkumar, Frank David Sanderlin
  • Patent number: 10343240
    Abstract: A vertical bundle air-cooled heat exchanger. In one embodiment, the invention can be a vertical bundle air-cooled condenser comprising: at least one tube bundle assembly comprising: a tube bundle comprising a plurality of finned tubes arranged in a substantially vertical and side-by-side orientation, each of the plurality of finned tubes comprising a cavity; a top header pipe comprising an inlet header cavity operably coupled to a source of steam; a bottom header pipe comprising an outlet header cavity for collecting condensate; top ends of the plurality of finned tubes coupled to the top header pipe and the bottom ends of the plurality of finned tubes coupled to the bottom header pipe; and a shell having an open top end and open bottom end, the at least one tube bundle assembly positioned within the shell.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: July 9, 2019
    Inventors: Krishna P. Singh, Indresh Rampall, Joseph Rajkumar, Frank David Sanderlin
  • Patent number: 10161683
    Abstract: An indirect dry cooling system suitable for steam condensing applications in a power plant Rankine cycle in one embodiment includes an air cooled condenser having a plurality of interconnected modular cooling cells. Each cell comprises a blower and tube bundle assemblies each including inlet headers, outlet headers, and plurality of tubes extending between the headers. In one embodiment, the tube bundle assemblies may be shop fabricated as a unit to form an A-frame or V-frame cell construction The tubes may be finned. Steam circulating in a closed flow loop on the tube side from a steam turbine is cooled in each cell by ambient air blown through the tube bundles, thereby forming liquid condensate. The condensate is collected and returned to the Rankine cycle for reheating to form steam to drive the turbine.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: December 25, 2018
    Inventors: Krishna P. Singh, Vytautas Vincas Maciunas, Indresh Rampall
  • Patent number: 10132568
    Abstract: An indirect dry cooling system suitable for steam condensing applications in a power plant Rankine cycle includes an air blast chiller having a plurality of interconnected modular cooler cells. Each cell includes a blower and tube bundle including inlet headers, outlet headers, and plurality of tubes extending between the headers. In one embodiment, the tube bundles form an A-frame cell construction being structurally self-supporting from a base. Each of the tubes may be finned. Cooling water circulating in a closed flow loop on the tube side between the air blast chiller and turbine steam condenser is cooled by ambient air blown through the tube bundles. The cooled water flows through a second tube bundle in the condenser which condenses steam. The heated cooling water returns through the air blast chiller to complete the cooling water cycle.
    Type: Grant
    Filed: August 22, 2016
    Date of Patent: November 20, 2018
    Inventors: Krishna P. Singh, Vytautas Vincas Maciunas, Indresh Rampall
  • Publication number: 20180068751
    Abstract: A nuclear reactor in one embodiment includes a cylindrical body having an internal cavity, a nuclear fuel core, and a shroud disposed in the cavity. The shroud comprises an inner shell, an outer shell, and a plurality of intermediate shells disposed between the inner and outer shells. Pluralities of annular cavities are formed between the inner and outer shells which are filled with primary coolant such as demineralized water. The coolant-filled annular cavities may be sealed at the top and bottom and provide an insulating effect to the shroud. In one embodiment, the shroud may comprise a plurality of vertically-stacked self-supported shroud segments which are coupled together.
    Type: Application
    Filed: September 26, 2017
    Publication date: March 8, 2018
    Inventors: Krishna P. Singh, Indresh Rampall, Joseph Gerald Leo Rajkumar
  • Publication number: 20180029175
    Abstract: A vertical bundle air-cooled heat exchanger. In one embodiment, the invention can be a vertical bundle air-cooled condenser comprising: at least one tube bundle assembly comprising: a tube bundle comprising a plurality of finned tubes arranged in a substantially vertical and side-by-side orientation, each of the plurality of finned tubes comprising a cavity; a top header pipe comprising an inlet header cavity operably coupled to a source of steam; a bottom header pipe comprising an outlet header cavity for collecting condensate; top ends of the plurality of finned tubes coupled to the top header pipe and the bottom ends of the plurality of finned tubes coupled to the bottom header pipe; and a shell having an open top end and open bottom end, the at least one tube bundle assembly positioned within the shell.
    Type: Application
    Filed: September 26, 2017
    Publication date: February 1, 2018
    Inventors: Krishna P. Singh, Indresh Rampall, Joseph Rajkumar, Frank David Sanderlin
  • Publication number: 20180023423
    Abstract: An autonomous self-powered system for cooling radioactive materials comprising: a pool of liquid; a closed-loop fluid circuit comprising a working fluid having a boiling temperature that is less than a boiling temperature of the liquid of the pool, the closed-loop fluid circuit comprising, in operable fluid coupling, an evaporative heat exchanger at least partially immersed in the liquid of the pool, a turbogenerator, and a condenser; one or more forced flow units operably coupled to the closed-loop fluid circuit to induce flow of the working fluid through the closed-loop fluid circuit; and the closed-loop fluid circuit converting thermal energy extracted from the liquid of the pool into electrical energy in accordance with the Rankine Cycle, the electrical energy powering the one or more forced flow units.
    Type: Application
    Filed: September 25, 2017
    Publication date: January 25, 2018
    Inventors: Krishna P. Singh, Indresh Rampall, Joseph Rajkumar
  • Patent number: 9803510
    Abstract: An autonomous self-powered system for cooling radioactive materials comprising: a pool of liquid; a closed-loop fluid circuit comprising a working fluid having a boiling temperature that is less than a boiling temperature of the liquid of the pool, the closed-loop fluid circuit comprising, in operable fluid coupling, an evaporative heat exchanger at least partially immersed in the liquid of the pool, a turbogenerator, and a condenser; one or more forced flow units operably coupled to the closed-loop fluid circuit to induce flow of the working fluid through the closed-loop fluid circuit; and the closed-loop fluid circuit converting thermal energy extracted from the liquid of the pool into electrical energy in accordance with the Rankine Cycle, the electrical energy powering the one or more forced flow units.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: October 31, 2017
    Inventors: Krishna P. Singh, Indresh Rampall, Joseph Rajkumar
  • Patent number: 9770794
    Abstract: A vertical bundle air-cooled heat exchanger, In one embodiment, the invention can be a vertical bundle air-cooled condenser comprising: at least one tube bundle assembly comprising; a tube bundle comprising a plurality of finned tubes arranged in a substantially vertical and side-by-side orientation, each of the plurality of finned tubes comprising a cavity; a top header pipe comprising an inlet header cavity operably coupled to a source of steam; a bottom header pipe comprising an outlet header cavity for collecting condensate; top ends of the plurality of finned tubes coupled to the top header pipe and the bottom ends of the plurality of finned tubes coupled to the bottom header pipe; and, a shell having an open, top end and open bottom end, the at least one tube bundle assembly positioned within the shell.
    Type: Grant
    Filed: June 4, 2012
    Date of Patent: September 26, 2017
    Inventors: Krishna P. Singh, Indresh Rampall, Joseph Rajkumar, Frank David Sanderlin
  • Patent number: 9773576
    Abstract: A nuclear reactor in one embodiment includes a cylindrical, body having an internal cavity, a nuclear fuel core, and a shroud disposed in the cavity. The shroud comprises an inner shell, an outer shell and a plurality of intermediate shells disposed between the inner and outer shells. Pluralities of annular cavities are formed between the inner and outer shells which are filled with primary coolant such as demineralized water. The coolant-filled annular cavities may be sealed at the top and bottom and provide an insulating effect to the shroud. In one embodiment, the shroud may comprise a plurality of vertically-stacked self-supported shroud segments which are coupled together.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: September 26, 2017
    Inventors: Krishna P. Singh, Indresh Rampall, Joseph Gerald Leo Rajkumar
  • Publication number: 20170133112
    Abstract: A nuclear reactor system that, in one embodiment, utilizes natural circulation to circulate a primary coolant in a single-phase through a reactor core and a heat exchange sub-system. The heat exchange subsystem is located outside of the nuclear reactor pressure vessels and, in some embodiments, is designed so as to not cause any substantial pressure drop in the flow of the primary coolant within the heat exchange sub-system that is used to vaporize a secondary coolant in another embodiment, a nuclear reactor system is disclosed in which the reactor core is located below ground and all penetrations into the reactor pressure vessel are located above ground.
    Type: Application
    Filed: January 24, 2017
    Publication date: May 11, 2017
    Inventors: Krishna P. Singh, P. Stephan Anton, Ranga Nadig, Indresh Rampall
  • Patent number: 9593598
    Abstract: A steam conditioning system for discharging bypass steam into a condenser of a steam powered generating plant and other uses. The system includes a steam conditioning device comprising an inner evaporative core and an outer shell. The core may be formed of a tubular piping section disposed at least partially inside the outer shell forming an annular space therebetween. An inlet end of the core receives steam from a piping header fluidly connected to an upstream desuperheating pressure reducing station which injects liquid coolant into the steam stream. Steam discharges through the core outlet end into the outer shell, reverses direction, and flows into the condenser. In one embodiment, the steam conditioning device may be disposed inside the dome of the condenser except for the inlet end. The device intends to increase flow residence time to evaporate entrained carryover coolant droplets in the incoming steam before release to the condenser.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: March 14, 2017
    Inventors: Akhilesh Vidyutkumar Bapat, Indresh Rampall, Vytautas Vincas Maciunas
  • Publication number: 20170051980
    Abstract: An indirect dry cooling system suitable for steam condensing applications in a power plant Rankine cycle includes an air blast chiller having a plurality of interconnected modular cooler cells. Each cell comprises a blower and tube bundle including inlet headers, outlet headers, and plurality of tubes extending between the headers. In one embodiment, the tube bundles form an A-frame cell construction being structurally self-supporting from a base. Each of the tubes may be finned. Cooling water circulating in a closed flow loop on the tube side between the air blast chiller and turbine steam condenser is cooled by ambient air blown through the tube bundles. The cooled water flows through a second tube bundle in the condenser which condenses steam. The heated cooling water returns through the air blast chiller to complete the cooling water cycle.
    Type: Application
    Filed: August 22, 2016
    Publication date: February 23, 2017
    Inventors: Krishna P. Singh, Vytautas Vincas Maciunas, Indresh Rampall
  • Publication number: 20170051981
    Abstract: An indirect dry cooling system suitable for steam condensing applications in a power plant Rankine cycle in one embodiment includes an air cooled condenser having a plurality of interconnected modular cooling cells. Each cell comprises a blower and tube bundle assemblies each including inlet headers, outlet headers, and plurality of tubes extending between the headers. In one embodiment, the tube bundle assemblies may be shop fabricated as a unit to form an A-frame or V-frame cell construction The tubes may be finned. Steam circulating in a closed flow loop on the tube side from a steam turbine is cooled in each cell by ambient air blown through the tube bundles, thereby forming liquid condensate. The condensate is collected and returned to the Rankine cycle for reheating to form steam to drive the turbine.
    Type: Application
    Filed: September 21, 2016
    Publication date: February 23, 2017
    Inventors: Krishna P. Singh, Vytautas Vincas Maciunas, Indresh Rampall
  • Publication number: 20160012923
    Abstract: A nuclear reactor in one embodiment includes a cylindrical, body having an internal cavity, a nuclear fuel core, and a shroud disposed in the cavity. The shroud comprises an inner shell, an outer shell and a plurality of intermediate shells disposed between the inner and outer shells. Pluralities of annular cavities are formed between the inner and outer shells which are filled with primary coolant such as demineralized water. The coolant-filled annular cavities may be sealed at the top and bottom and provide an insulating effect to the shroud. In one embodiment, the shroud may comprise a plurality of vertically-stacked self-supported shroud segments which are coupled together.
    Type: Application
    Filed: February 27, 2014
    Publication date: January 14, 2016
    Inventors: Krishna P. Singh, Indresh Rampall, Joseph Gerald Leo Rajkumar
  • Publication number: 20150360332
    Abstract: A vertical bundle air-cooled heat exchanger, In one embodiment, the invention can be a vertical bundle air-cooled condenser comprising: at least one tube bundle assembly comprising; a tube bundle comprising a plurality of finned tubes arranged in a substantially vertical and side-by-side orientation, each of the plurality of finned tubes comprising a cavity; a top header pipe comprising an inlet header cavity operably coupled to a source of steam; a bottom header pipe comprising an outlet header cavity for collecting condensate; top ends of the plurality of finned tubes coupled to the top header pipe and the bottom ends of the plurality of finned tubes coupled to the bottom header pipe; and, a shell having an open, top end and open bottom end, the at least one tube bundle assembly positioned within the shell.
    Type: Application
    Filed: June 4, 2012
    Publication date: December 17, 2015
    Inventors: Krishna P. Singh, Indresh Rampall, Joseph Rajkumar, Frank David Sanderlin
  • Publication number: 20150330260
    Abstract: A steam conditioning system for discharging bypass steam into a condenser of a steam powered generating plant and other uses. The system includes a steam conditioning device comprising an inner evaporative core and an outer shell. The core may be formed of a tubular piping section disposed at least partially inside the outer shell forming an annular space therebetween. An inlet end of the core receives steam from a piping header fluidly connected to an upstream desuperheating pressure reducing station which injects liquid coolant into the steam stream. Steam discharges through the core outlet end into the outer shell, reverses direction, and flows into the condenser. In one embodiment, the steam conditioning device may be disposed inside the dome of the condenser except for the inlet end. The device intends to increase flow residence time to evaporate entrained carryover coolant droplets in the incoming steam before release to the condenser.
    Type: Application
    Filed: May 13, 2015
    Publication date: November 19, 2015
    Inventors: Akhilesh Vidyutkumar Bapat, Indresh Rampall, Vytautas Vincas Maciunas
  • Publication number: 20120307956
    Abstract: A nuclear reactor system that, in one embodiment, utilizes natural circulation (i.e., thermosiphon) to circulate a primary coolant in a single-phase through a reactor core and a heat exchange sub-system. The heal exchange sub-system is located outside of the nuclear reactor pressure vessels and, in some embodiments, is designed so as to not cause any substantial pressure drop in the flow of the primary coolant within the heal exchange sub-system that is used to vaporize a secondary coolant. In another embodiment, a nuclear reactor system is disclosed in which the reactor core is located below ground and all penetrations into the reactor pressure vessel are located above ground.
    Type: Application
    Filed: February 7, 2011
    Publication date: December 6, 2012
    Inventors: Krishna P. Singh, P. Stefan Anton, Ranga Nadig, Indresh Rampall
  • Publication number: 20120294737
    Abstract: An autonomous self-powered system for cooling radioactive materials comprising: a pool of liquid; a closed-loop fluid circuit comprising a working fluid having a boiling temperature that is less than a boiling temperature of the liquid of the pool, the closed-loop fluid circuit comprising, in operable fluid coupling, an evaporative heat exchanger at least partially immersed in the liquid of the pool, a turbogenerator, and a condenser; one or more forced flow units operably coupled to the closed-loop fluid circuit to induce flow of the working fluid through the closed-loop fluid circuit; and the closed-loop fluid circuit converting thermal energy extracted from the liquid of the pool into electrical energy in accordance with the Rankine Cycle, the electrical energy powering the one or more forced flow units.
    Type: Application
    Filed: April 18, 2012
    Publication date: November 22, 2012
    Inventors: Krishna P. Singh, Indresh Rampall, Joseph Rajkumar