Patents by Inventor Alexander Alekseev

Alexander Alekseev 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: 10823405
    Abstract: Integration of an oxyfuel combustion boiler at elevated pressures and a heat exchanger is achieved to produce carbon dioxide by feeding flue gas comprising carbon dioxide and water from the oxyfuel combustion boiler to a direct contact cooler column wherein water is condensed at a temperature of 0 to 10° C. lower than its dew point; feeding a portion of the condensed water from the direct contact cooler column to the oxyfuel combustion boiler; feeding a portion of the carbon dioxide from the direct contact cooler column to the oxyfuel combustion boiler; and recovering a portion of the carbon dioxide from the direct contact cooler column.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: November 3, 2020
    Assignee: Linde Aktiengesellschaft
    Inventors: Alexander Alekseev, Stevan Jovanovic
  • Publication number: 20200148542
    Abstract: A method is provided for producing carbon dioxide by combusting a carbonaceous fuel with a oxygen or with a gas mixture containing more than 25 mol % of oxygen obtaining a flue gas mixture, wherein the flue gas mixture is processed obtaining a secondary gas mixture containing carbon dioxide and oxygen, and wherein a part of the oxygen contained in the secondary gas mixture is catalytically reacted with a first auxiliary fuel in a reactor system comprising a series of multiple reactors, obtaining further carbon dioxide and water. A further part of the oxygen contained in the secondary gas mixture is catalytically reacted with a second auxiliary fuel in the reactor system. A corresponding apparatus is also described herein.
    Type: Application
    Filed: November 12, 2019
    Publication date: May 14, 2020
    Applicant: LINDE AKTIENGESELLSCHAFT
    Inventors: Alexander ALEKSEEV, Ramachandran Krish KRISHNAMURTHY, Stevan JOVANOVIC
  • Publication number: 20200045849
    Abstract: A method and apparatus for cooling a load using liquid nitrogen conveyed in a circuit are provided. Cooled liquid nitrogen is used for cooling the liquid nitrogen conveyed in the circuit. A first proportion of the liquid nitrogen is cooled in an open cooling system and a second proportion is cooled in a closed cooling system using one or more cooling units. The open cooling system and closed cooling system are used for cooling of a power supply having a first end and a second end. The open cooling system is arranged at the first end and the closed cooling system is arranged at the second end. Cooling power is provided in a first time period as a first, smaller amount of total cooling power and in a second time period as a second, higher amount of total cooling power. A first proportion of the amount of total cooling power is provided by means of the open cooling system and a second proportion is provided by means of the closed cooling system.
    Type: Application
    Filed: January 10, 2018
    Publication date: February 6, 2020
    Applicant: LINDE AKTIENGESELLSCHAFT
    Inventor: Alexander ALEKSEEV
  • Patent number: 10443931
    Abstract: The method and the device arc used for the cryogenic decomposition of air in a distillation column system for separating nitrogen and oxygen, said system having a first high-pressure column (23), a low-pressure column (25, 26), and three condenser-evaporators, namely a high-pressure column head condenser (27), a low-pressure column bottom evaporator (28), and an auxiliary condenser (29; 228).
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: October 15, 2019
    Assignee: LINDE AKTIENGESELLSCHAFT
    Inventors: Georg Demski, Alexander Alekseev, Thomas Rathbone, Dimitri Goloubev, Ayhan Yayli
  • Patent number: 10222120
    Abstract: The invention relates to a method and device for generating two purified partial air streams under different pressures. A total air stream (1) is compressed to a first total air pressure. The compressed total air stream (5) is cooled with cooling water under the first total air pressure by way of heat exchange (4, 6). The heat exchange with cooling water for cooling the total air stream (5) is carried out as a direct heat exchange in a first direct contact cooler (6), at least in part. The cooled total air stream (9) is divided into a first partial air stream (10) and a second partial air stream (11). The first partial air stream (10) is purified in a first purification device (18) under the first total air pressure, generating the first purified partial air stream (19). The second partial air stream (11) is re-compressed to a higher pressure (12), which is higher than the first total air pressure.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: March 5, 2019
    Assignee: LINDE AKTIENGESELLSCHAFT
    Inventors: Alexander Alekseev, Dimitri Goloubev
  • Patent number: 10177629
    Abstract: A method for producing electrical energy in a combined energy generation plant which comprises an air treatment unit and a power station unit is proposed. In a first operating mode, air is liquefied to form an air liquefaction product and, in a second operating mode, an air liquefaction product is converted into a gaseous or supercritical state, in which said product is introduced into the power station unit and is used for producing electrical energy. In a third operating mode, air is condensed in the air treatment unit and used in the power station unit directly for producing electrical energy. It is envisaged that, in the first operating mode, the air is cooled to several temperature levels by two liquid coolants and the air liquefaction product is correspondingly heated. In addition, in the first operating mode, the air is condensed stepwise over several pressure levels.
    Type: Grant
    Filed: July 29, 2014
    Date of Patent: January 8, 2019
    Assignee: Mitsubishi Hitachi Power Systems Europe GMBH
    Inventors: Christoph Stiller, Sebastian Rehfeldt, Brian Stöver, Alexander Alekseev
  • Publication number: 20190003708
    Abstract: Integration of an oxyfuel combustion boiler at elevated pressures and a heat exchanger is achieved to produce carbon dioxide by feeding flue gas comprising carbon dioxide and water from the oxyfuel combustion boiler to a direct contact cooler column wherein water is condensed at a temperature of 0 to 10° C. lower than its dew point; feeding a portion of the condensed water from the direct contact cooler column to the oxyfuel combustion boiler; feeding a portion of the carbon dioxide from the direct contact cooler column to the oxyfuel combustion boiler; and recovering a portion of the carbon dioxide from the direct contact cooler column.
    Type: Application
    Filed: January 31, 2017
    Publication date: January 3, 2019
    Inventors: Alexander Alekseev, Stevan Jovanocic
  • Patent number: 10054613
    Abstract: The microscope for monitoring objects after nano-cutting and for investigating structures of macro- and micro-carriers under low temperature comprises a punch having a cutting edge, drives driving the punch along two axes, a platform rotatable in a plane, a piezo-scanner for recording a sample image along three axes, a holder with a carrier of the sample, and a probe unit to which a probe is fastened. The piezo-scanner is fastened to the platform, the punch is able to interact with the sample, and the probe unit is mounted on the platform so as to be movable along one of the axes. The assembly includes a module for mechanical action on the cutting edge of the punch to modify the cutting surface, which module is fastened to the same platform to which the piezo-scanner with the object carrier and the probe unit are fastened.
    Type: Grant
    Filed: July 10, 2015
    Date of Patent: August 21, 2018
    Assignee: PRIVATE INSTITUTION “NAZARBAYEV UNIVERSITY RESEARCH AND INNOVATION SYSTEM”
    Inventors: Alexander Alekseev, Aleksey Dmitriyevich Volkov, Dmitry Yuryevich Sokolov, Anton Evgeniyevich Efimov
  • Publication number: 20180163571
    Abstract: An oxyfuel power plant having improved efficiency of operation by the provision of at least two condensation units, the first being a warmer operating direct contact cooler and the second being a colder operating direct contact cooler. Each apparatus is loaded with a different quantity of water, with the warmer direct contact cooler having two to three times the amount of water that is in the colder direct contact cooler.
    Type: Application
    Filed: December 6, 2017
    Publication date: June 14, 2018
    Inventors: Sebastian Obermeier, Alexander Alekseev
  • Publication number: 20180155202
    Abstract: A method of integrating energy into a power cycle during production of carbon dioxide using the steps of a) combusting a fuel and oxygen in a reactor to produce a mixture of carbon dioxide and water, and form a heat of reaction; b) capturing the heat of reaction; c) converting the heat of reaction into electrical energy; d) feeding the electrical energy into the power cycle; and e) purifying and recovering carbon dioxide. Alternatively, a method for the production of carbon dioxide and power is disclosed by a) combusting a fuel and oxygen in a reactor to produce a flue gas comprising carbon dioxide and contaminants and a heat of reaction; b) recovering heat from the reactor and producing electricity from the heat; c) integrating the electricity into a power cycle; and d) removing contaminants from the carbon dioxide and recovering purified carbon dioxide.
    Type: Application
    Filed: November 21, 2017
    Publication date: June 7, 2018
    Inventors: Alexander Alekseev, Stevan Jovanovic, Ramachandran Krishnamurthy
  • Publication number: 20170350921
    Abstract: The microscope for monitoring objects after nano-cutting and for investigating structures of macro- and micro-carriers under low temperature comprises a punch having a cutting edge, drives driving the punch along two axes, a platform rotatable in a plane, a piezo-scanner for recording a sample image along three axes, a holder with a carrier of the sample, and a probe unit to which a probe is fastened. The piezo-scanner is fastened to the platform, the punch is able to interact with the sample, and the probe unit is mounted on the platform so as to be movable along one of the axes. The assembly includes a module for mechanical action on the cutting edge of the punch to modify the cutting surface, which module is fastened to the same platform to which the piezo-scanner with the object carrier and the probe unit are fastened.
    Type: Application
    Filed: July 10, 2015
    Publication date: December 7, 2017
    Applicant: PRIVATE INSTITUTION "NAZARBAYEV UNIVERSITY RESEARCH AND INNOVATION SYSTEM"
    Inventors: Alexander Alekseev, Aleksey Dmitriyevich Volkov, Dmitry Yuryevich Sokolov, Anton Evgeniyevich Efimov
  • Patent number: 9810103
    Abstract: The invention relates to a method and a device for generating electrical energy in a combined system consisting of a power plant and an air handling system. The power plant comprises a first gas expansion unit connected to a generator. The air handling system comprises an air compression unit, a heat exchange system, and a fluid tank. In a first operating mode, feed air is compressed in the air compression unit and cooled in the heat exchange system. A storage fluid is generated from the compressed and cooled feed air and is stored as cryogenic fluid in fluid tank. In a second operating mode, cryogenic fluid is removed from fluid tank and is vaporized, or pseudo-vaporized, at superatmospheric pressure. The gaseous high pressure storage fluid generated is expanded in the gas expansion unit. Gaseous natural gas is introduced into the heat exchange system (21) to be liquefied.
    Type: Grant
    Filed: August 1, 2013
    Date of Patent: November 7, 2017
    Assignee: LINDE AKTIENGESELLSCHAFT
    Inventor: Alexander Alekseev
  • Patent number: 9733014
    Abstract: The invention relates to a method and device for obtaining compressed oxygen and compressed nitrogen by the low-temperature separation of air in a distillation column system for nitrogen-oxygen separation, said distillation column system having at least one high-pressure column (8) and one low-pressure column (460), wherein the low-pressure column (460) is in a heat-exchanging connection with the high-pressure column (8) by means of a main condenser (461) designed as a condenser-evaporator. Feed air is compressed in an air compressor (2). The compressed feed air (6, 734, 802, 840) is cooled down in a main heat exchanger (20) and at least partially introduced into the high-pressure column (8). An oxygen-enriched liquid (462, 465) is removed from the high-pressure column (8) and fed to the low-pressure column (460) at a first intermediate position (464, 467, 906).
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: August 15, 2017
    Assignee: LINDE AKTIENGESELLSCHAFT
    Inventors: Dirk Schwenk, Alexander Alekseev, Frances Masterson, Dimitri Goloubev
  • Publication number: 20170211882
    Abstract: A method for producing an air product in an air separation plant. Feed air is cooled at least in a main air compressor and is fed into a distillation column system. A fluid storage unit and a cold accumulator are used. In a first operating mode, fluid is stored in the fluid storage unit and the cold accumulator is heated. In a third operating mode, fluid is released and the cold accumulator is cooled, and in a second operating mode, fluid is neither stored nor released.
    Type: Application
    Filed: July 23, 2015
    Publication date: July 27, 2017
    Inventor: Alexander Alekseev
  • Publication number: 20170211880
    Abstract: An air product is produced in an air separation plant having a heat exchanger, an expansion/compression unit, a rectification unit, liquid storage, cold storage and an air compressor. The air supplied to the rectification unit is conducted through the main air compressor at a pressure level at least 3 bar above the highest operation pressure for the rectification unit. Cryogenic liquids are produced in a first production amount by a first operating mode, a lower second production amount by a second operating mode and a higher third production amount by a third operating mode. Cryogenic liquid is stored in the liquid storage in the third operating mode and removed from storage in the second operating mode. Cryogenic liquid is evaporated in different amounts in each operating mode, which amounts differ by no more than 10%.
    Type: Application
    Filed: January 6, 2017
    Publication date: July 27, 2017
    Inventor: Alexander Alekseev
  • Publication number: 20170175585
    Abstract: The invention relates to a method for storing and recovering energy, according to which a condensed air product (LAIR) is formed in an energy storage period, and in an energy recovery period, a pressure flow is formed and is expanded to produce energy using at least part of the condensed air product (LAIR) without a supply of heat from an external heat source. The method comprises inter alia, for the formation of the condensed air product (LAIR): the compression of air (AIR) in an air conditioning unit (10), at least by means of an adiabatically operated compressor device (12); the formation of a first and a second sub-flow downstream of the adiabatically driven compressor device (12), said flows being formed from the air (AIR) that has been compressed in said device and the guiding of the first and second sub-flows in parallel through a first thermal store (131) and through a second thermal store (132), in which stores heat produced during the compression of the air (AIR) is at least partially stored.
    Type: Application
    Filed: April 2, 2015
    Publication date: June 22, 2017
    Inventor: Alexander ALEKSEEV
  • Patent number: 9608498
    Abstract: A method and device for generating electrical energy in a combined system of power plant, cold storage system and air compression system. The air compression system has a primary air compressor for generating a primary compressed air flow at a first pressure level. The power plant has a combustion unit which operates at a second pressure level and generates a combustion gas from which electrical energy is generated. The cold storage system has means for generating cold from compressed air, means for storing cold thus produced and means for generating a compressed air flow at the second pressure level using the stored cold. In a first operating mode (charging mode), a first compressed air flow is introduced from the air compression system into the cold storage system to charge the cold reservoir.
    Type: Grant
    Filed: March 21, 2014
    Date of Patent: March 28, 2017
    Assignee: Linde Aktiengesellschaft
    Inventors: Alexander Alekseev, Christoph Stiller
  • Publication number: 20170022897
    Abstract: A method and installation for storing and recovering energy, according to which a condensed air product is formed in an energy storage period, and in an energy recovery period, a pressure flow is formed and is expanded to produce energy using at least part of the condensed air product. For the formation of the condensed air product: the compression of air in an air conditioning unit, at least by means of at least one isothermally operated compressor device and the adsorptive cleaning of the air by means of at least one adsorptive cleaning device at a hyperbaric pressure level.
    Type: Application
    Filed: April 2, 2015
    Publication date: January 26, 2017
    Inventors: Alexander Alekseev, Christoph Stiller, Brian Stöver, Christian Bergins
  • Publication number: 20160370111
    Abstract: A method for producing at least one air product, wherein an air separation system is used which has a primary air compressor, a primary heat exchanger and a distillation column system, and which comprises a first and a second operation mode, wherein, in the first operating mode, at least one liquid air product produced in the distillation column system is saved and, in the second operating mode, the at least one air product saved in the first operating mode and/or at least one additional liquid air product is supplied to the distillation column system.
    Type: Application
    Filed: July 10, 2014
    Publication date: December 22, 2016
    Inventor: Alexander Alekseev
  • Patent number: 9435229
    Abstract: The disclosed process and apparatus provide for air separation and steam generation in a combined system that comprises a steam system (10) and an air separation plant (9), wherein a feed air stream (1) is introduced into a multistage air compression system (101, 102, 103) having n stages (n>=3) and compressed to a first high pressure that is equal to the final pressure of the air compression system, and, at this final pressure, is introduced (8) into the air separation plant (9). An intercooler is arranged between an i-th stage (102) (1<=i<n) and an i+1-th stage (103) of the air compression system; there, the feed air stream (4) is cooled in indirect heat exchange with a feed water stream (11).
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: September 6, 2016
    Assignee: LINDE AG
    Inventors: Alexander Alekseev, Dimitri Goloubev