Patents Represented by Attorney, Agent or Law Firm Stanley Ktorides
  • Dual section refrigeration system
    Patent number: 6666046
    Abstract: A refrigeration system particularly useful with a multicomponent refrigerant fluid wherein the refrigerant fluid is cooled in an upward leg of a first vertically oriented heat exchanger section and further cooled in a downward leg of a second vertically oriented heat exchanger section prior to refrigeration generation and serial recycle flow through the two heat exchanger sections.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: December 23, 2003
    Assignee: Praxair Technology, Inc.
    Inventors: Michael James Lockett, Richard J. Jibb, Vijayaraghavan Srinivasan Chakravarthy
  • Method for operating a cryogenic plant
    Patent number: 6666049
    Abstract: A method for operating a cryogenic plant using an online real-time monitoring and diagnostic system that continually compares actual versus expected plant key performance indicators, alerts operating personnel to any significant performance shortfall, assists in required diagnostics, and suggests corrective actions, preferably using a top-down diagnostic tree methodology that presents calculated key performance indicators to the operator in a manner which logically flows from plant overview to detailed breakdown by plant area and equipment component.
    Type: Grant
    Filed: March 20, 2003
    Date of Patent: December 23, 2003
    Assignee: Praxair Technology, Inc.
    Inventors: Edward Katende, Amit Gupta, Paul F. Scharf
  • Method for controlling the operation of a cryogenic rectification plant
    Patent number: 6647745
    Abstract: A method for controlling the operation of a plant such as a cryogenic rectification plant wherein process parameters are quantitatively determined and then are qualitatively categorized to establish by reference to a rule set the general adjustment required for a plant element prior to determining the numerical adjustment for that element.
    Type: Grant
    Filed: December 5, 2002
    Date of Patent: November 18, 2003
    Assignee: Praxair Technology, Inc.
    Inventor: William Paul Belanger
  • Multistage pulse tube refrigeration system for high temperature super conductivity
    Patent number: 6644038
    Abstract: A pulse tube refrigeration system wherein the pulse tube working gas is cooled to a defined first stage temperature and is brought to a defined second stage temperature by operation of a regenerator and pulse tube, which are in flow communication through a cold heat exchanger, prior to providing refrigeration to a high temperature superconductor.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: November 11, 2003
    Assignee: Praxair Technology, Inc.
    Inventors: Arun Acharya, Bayram Arman, John Henri Royal, Dante Patrick Bonaquist
  • Cryogenic superconductor cooling system
    Patent number: 6640552
    Abstract: A system for providing refrigeration to a superconducting device wherein a cooling fluid is cooled by receiving refrigeration from one or more cryocoolers and then is warmed by indirect heat exchange with ballast liquid thereby providing cooling to the ballast liquid prior to providing refrigeration to the superconducting device.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: November 4, 2003
    Assignee: Praxair Technology, Inc.
    Inventors: Bryce Mark Rampersad, Dante Patrick Bonaquist, Barry Alan Minbiole, Arun Acharya
  • Pulse tube refrigeration system with tapered work transfer tube
    Patent number: 6640553
    Abstract: A pulse tube refrigeration system, having a pulse generator, a regenerator and a pulse tube, comprising a work transfer tube interposed between the pulse generator and the regenerator wherein the work transfer tube has a cross section at the end proximate the pulse generator which differs from the cross sectional area proximate the regenerator, enabling a reduction in heat transfer due to streaming within the work transfer tube.
    Type: Grant
    Filed: November 20, 2002
    Date of Patent: November 4, 2003
    Assignee: Praxair Technology, Inc.
    Inventors: Vincent Kotsubo, Bayram Arman, Dante Patrick Bonaquist, Arun Acharya
  • Multilevel refrigeration for high temperature superconductivity
    Patent number: 6640557
    Abstract: A method for refrigerating a high temperature superconducting device to maintain superconducting operating conditions wherein a first heat transfer means such as a first heat transfer fluid is cooled to a temperature greater than the temperature of saturated liquid nitrogen and is used for ambient heat intercept while a second heat transfer means such as a second heat transfer fluid is cooled to a temperature within the high temperature superconductivity temperature operating range to maintain superconducting operating conditions.
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: November 4, 2003
    Assignee: Praxair Technology, Inc.
    Inventors: Bayram Arman, Arun Acharya, Dante Patrick Bonaquist, John Henri Royal
  • Cold compression cryogenic rectification system for producing low purity oxygen
    Patent number: 6626008
    Abstract: A cryogenic rectification system for producing low purity oxygen from an auxiliary column to a double column system wherein the auxiliary column is reboiled by fluid taken from an intermediate level of the higher pressure column or by a portion of cooled feed air which is cold compressed to a higher pressure prior to the reboiling.
    Type: Grant
    Filed: December 11, 2002
    Date of Patent: September 30, 2003
    Assignee: Praxair Technology, Inc.
    Inventors: Neil Mark Prosser, Minish Mahendra Shah
  • Cryogenic rectification system for producing low purity oxygen using shelf vapor turboexpansion
    Patent number: 6622520
    Abstract: A cryogenic rectification system for producing low purity oxygen from an auxiliary column to a double column system and which can also effectively produce nitrogen gas product and/or one or more liquid products wherein the lower pressure column of the double column system is reboiled in part by turboexpanded shelf vapor which is condensed in an intermediate reboiler and preferably subcooled prior to passage into the lower pressure column.
    Type: Grant
    Filed: December 11, 2002
    Date of Patent: September 23, 2003
    Assignee: Praxair Technology, Inc.
    Inventors: Neil Mark Prosser, Minish Mahendra Shah
  • System for providing refrigeration for chemical processing
    Patent number: 6604367
    Abstract: A system for providing refrigeration to a chemical processing operation wherein a refrigerant fluid is compressed and cooled, and a portion turboexpanded prior to being passed to a chemical processing operation for direct contact or indirect heat exchange.
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: August 12, 2003
    Assignee: Praxair Technology, Inc.
    Inventors: M. Mushtaq Ahmed, Theodore Fringelin Fisher
  • Thermoacoustic cogeneration system
    Patent number: 6604364
    Abstract: A method for operating a thermoacoustic engine which produces acoustic energy which may be used to generate refrigeration wherein energy delivery fluid from a hot energy source, which provides heat to the thermoacoustic engine, is used to provide heat to a first heat sink such as a Kalina cycle and then at a lower temperature to a second heat sink.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: August 12, 2003
    Assignee: Praxair Technology, Inc.
    Inventors: Bayram Arman, Dante Patrick Bonaquist, John Henri Royal
  • Coherent jet system with single ring flame envelope
    Patent number: 6604937
    Abstract: A coherent jet lance and operating method wherein the need for a lance extension is eliminated using a single ring of ports to deliver flame envelope gases around the primary gas jets to maintain the gas jets coherent.
    Type: Grant
    Filed: May 24, 2002
    Date of Patent: August 12, 2003
    Assignee: Praxair Technology, Inc.
    Inventor: William John Mahoney
  • Cryogenic air separation with two phase feed air turboexpansion
    Patent number: 6601407
    Abstract: A method for cryogenic air separation wherein at least a portion of the feed air to the cryogenic air separation plant is partially condensed and the resulting two-phase feed air stream is turboexpanded to produce refrigeration and a resulting two-phase feed air stream, which has a liquid portion less than that of the input two-phase feed air stream to the turboexpander, prior to being passed into the cryogenic air separation plant.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: August 5, 2003
    Assignee: Praxair Technology, Inc.
    Inventors: Sabri Deniz, Gregory William Henzler, Dante Patrick Bonaquist
  • Method for providing refrigeration using two circuits with differing multicomponent refrigerants
    Patent number: 6595009
    Abstract: A method for providing refrigeration wherein a first multicomponent refrigerant is condensed to form a saturated liquid and vaporized against a condensing second multicomponent refrigerant which has a dew point less than the dew point and preferably the bubble point of the saturated liquid, and has a bubble point greater than that of the vaporizing first multicomponent refrigerant, and after providing refrigeration to a refrigeration load, may be superheated against the condensing first and second multicomponent refrigerants.
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: July 22, 2003
    Assignee: Praxair Technology, Inc.
    Inventors: Henry Edward Howard, Martin Lee Timm
  • Supercritical refrigeration system
    Patent number: 6591618
    Abstract: A method for providing refrigeration to a refrigeration load which enables the use of environmentally friendly refrigerants with lower power consumption than with conventional refrigerants wherein the low side pressure of the circuit exceeds the critical pressure of the refrigerant fluid and the refrigerant fluid is compressed to a higher supercritical pressure prior to expansion.
    Type: Grant
    Filed: August 12, 2002
    Date of Patent: July 15, 2003
    Assignee: Praxair Technology, Inc.
    Inventors: Henry Edward Howard, Arun Acharya, Bayram Arman, James Bragdon Wulf
  • Carbon dioxide recovery plant
    Patent number: 6592829
    Abstract: A system for recovering absorbate such as carbon dioxide from an oxygen containing mixture wherein carbon dioxide is concentrated in an alkanolamine containing absorption fluid, oxygen is separated from the absorption fluid, the resulting fluid is heated, and carbon dioxide is steam stripped from the absorption fluid and recovered.
    Type: Grant
    Filed: January 31, 2001
    Date of Patent: July 15, 2003
    Assignee: Praxair Technology, Inc.
    Inventors: Shrikar Chakravarti, Amitabh Gupta
  • Cryogenic liquefier/chiller
    Patent number: 6591632
    Abstract: A system for chilling and/or liquefying a fluid wherein a multicomponent refrigerant in a circuit is compressed, condensed, expanded and warmed to cool one or more portions of the fluid which are then turboexpanded to generate refrigeration and which are then used to provide refrigeration to a remaining portion of the fluid so as to chill and/or liquefy that remaining portion.
    Type: Grant
    Filed: November 19, 2002
    Date of Patent: July 15, 2003
    Assignee: Praxair Technology, Inc.
    Inventor: Kevin William Mahoney
  • Integrated absorption heat pump thermoacoustic engine refrigeration system
    Patent number: 6588224
    Abstract: A system for generating refrigeration wherein a hot process fluid is used to drive a thermoacoustic engine and residual heat from the process fluid is used to desorb refrigerant from a high pressure absorbent heat pump solution with the resulting refrigerant expanded to generate refrigeration prior to being reabsorbed by the absorbent.
    Type: Grant
    Filed: July 10, 2002
    Date of Patent: July 8, 2003
    Assignee: Praxair Technology, Inc.
    Inventors: Bayram Arman, Dante Patrick Bonaquist, John Henri Royal, Arun Acharya
  • Packing for mass transfer column
    Patent number: 6578829
    Abstract: A packing section includes a plurality of vertically oriented, diagonally cross-corrugated packing sheets defining a section height. The section height has a base region, a bulk region, and a top region. The base region has a first particular geometry different from the geometry of the bulk region.
    Type: Grant
    Filed: July 18, 2002
    Date of Patent: June 17, 2003
    Assignee: Praxair Technology, Inc.
    Inventors: Christoph Ender, John Fredric Billingham, Michael James Lockett, Neil Yeoman, Robert Kuratle, Kirk A. Walztoni, Daniel L. Kallenberger
  • Cryogenic air separation system with dual section main heat exchanger
    Patent number: 6568209
    Abstract: A cryogenic air separation system having a main heat exchanger for processing feed air, said heat exchanger having a reversing heat exchanger function in an upward feed airflow countercurrent section and having a desuperheating function in a downward feed air flow cocurrent section.
    Type: Grant
    Filed: September 6, 2002
    Date of Patent: May 27, 2003
    Assignee: Praxair Technology, Inc.
    Inventors: John Harold Ziemer, Anthony J. Kurek, Jr.