Patents by Inventor Lee J. Rosen

Lee J. Rosen 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: 11976789
    Abstract: A vaporization system and control method are provided. Liquid cryogen is provided to first ambient air vaporizer (AAV) units. When an output superheated vapor temperature is less than a threshold, the liquid cryogen is provided to second AAV units. When greater than or equal to the threshold, it is determined whether the second AAV units are defrosted. When defrosted, the liquid cryogen is provided to the second AAV units. When not defrosted, it is determined whether ice has formed on the first AAV units. When not formed, it is again determined whether the superheated vapor temperature is less than the threshold. When formed, it is determined whether a current ambient condition is favorable to defrosting the second AAV units. When not favorable, the liquid cryogen is provided to the second bank of AAV units. When favorable, it is again determined whether the superheated vapor temperature is less than the threshold.
    Type: Grant
    Filed: November 2, 2021
    Date of Patent: May 7, 2024
    Assignee: Praxair Technology, Inc.
    Inventors: Chao Liang, Lee J. Rosen, Seth A. Potratz, Hanfei Tuo, Rakesh Ranjan
  • Patent number: 11953159
    Abstract: A cryogenic vaporization system and a method for controlling the system are provided. The system includes a first vaporizer arrangement and a second vaporizer arrangement configured for receiving a liquid cryogen and outputting a superheated vapor. The second vaporizer arrangement is connected in parallel with the first vaporizer arrangement, and includes one or more banks of ambient air vaporizer (AAV) units or loose fill media with a high heat capacity. The second vaporizer arrangement has a different configuration than that of the first vaporizer arrangement. The system further includes at least one control valve controlling provision of the liquid cryogen to at least one of the first vaporizer arrangement and the second vaporizer arrangement.
    Type: Grant
    Filed: November 2, 2021
    Date of Patent: April 9, 2024
    Assignee: Praxair Technology, Inc.
    Inventors: Chao Liang, Seth A. Potratz, Lee J. Rosen, Hanfei Tuo, Rui Ma
  • Publication number: 20220290813
    Abstract: A cryogenic vaporization system and a method for controlling the system are provided. The system includes a first vaporizer arrangement and a second vaporizer arrangement configured for receiving a liquid cryogen and outputting a superheated vapor. The second vaporizer arrangement is connected in parallel with the first vaporizer arrangement, and includes one or more banks of ambient air vaporizer (AAV) units or loose fill media with a high heat capacity. The second vaporizer arrangement has a different configuration than that of the first vaporizer arrangement. The system further includes at least one control valve controlling provision of the liquid cryogen to at least one of the first vaporizer arrangement and the second vaporizer arrangement.
    Type: Application
    Filed: November 2, 2021
    Publication date: September 15, 2022
    Inventors: Chao Liang, Seth A. Potratz, Lee J. Rosen, Hanfei Tuo, Rui Ma
  • Publication number: 20220290816
    Abstract: A vaporization system and control method are provided. Liquid cryogen is provided to first ambient air vaporizer (AAV) units. When an output superheated vapor temperature is less than a threshold, the liquid cryogen is provided to second AAV units. When greater than or equal to the threshold, it is determined whether the second AAV units are defrosted. When defrosted, the liquid cryogen is provided to the second AAV units. When not defrosted, it is determined whether ice has formed on the first AAV units. When not formed, it is again determined whether the superheated vapor temperature is less than the threshold. When formed, it is determined whether a current ambient condition is favorable to defrosting the second AAV units. When not favorable, the liquid cryogen is provided to the second bank of AAV units. When favorable, it is again determined whether the superheated vapor temperature is less than the threshold.
    Type: Application
    Filed: November 2, 2021
    Publication date: September 15, 2022
    Inventors: Chao Liang, Lee J. Rosen, Seth A. Potratz, Hanfei Tuo, Rakesh Ranjan
  • Patent number: 10533564
    Abstract: A method for compression of an incoming feed air stream using at least two variable speed compressor drive assemblies controlled in tandem is provided. The first variable speed drive assembly drives at least one compression stage in the lower pressure compressor unit driven while the second variable speed drive assembly drives higher pressure compression stage disposed either in the common air compression train or the split functional compression train of the air separation plant. The first and second variable speed drive assemblies are preferably high speed, variable speed electric motor assemblies each having a motor body, a motor housing, and a motor shaft with one or more impellers directly and rigidly coupled to the motor shaft via a sacrificial rigid shaft coupling.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: January 14, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Henry E. Howard, Carl L. Schwarz, Ahmed F. Abdelwahab, Lee J. Rosen, Nick J. Degenstein, Reh-Lin Chen
  • Patent number: 10533565
    Abstract: A method for compression of an incoming feed air stream using at least two variable speed compressor drive assemblies controlled in tandem is provided. The first variable speed drive assembly drives at least one compression stage in the lower pressure compressor unit driven while the second variable speed drive assembly drives higher pressure compression stage disposed either in the common air compression train or the split functional compression train of the air separation plant. The first and second variable speed drive assemblies are preferably high speed, variable speed electric motor assemblies each having a motor body, a motor housing, and a motor shaft with one or more impellers directly and rigidly coupled to the motor shaft via a sacrificial rigid shaft coupling.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: January 14, 2020
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Henry E. Howard, Carl L. Schwarz, Ahmed F. Abdelwahab, Lee J. Rosen, Nick J. Degenstein, Reh-Lin Chen
  • Patent number: 10519962
    Abstract: A method for compression of an incoming feed air stream using at least two variable speed compressor drive assemblies controlled in tandem is provided. The first variable speed drive assembly drives at least one compression stage in the lower pressure compressor unit driven while the second variable speed drive assembly drives higher pressure compression stage disposed either in the common air compression train or the split functional compression train of the air separation plant. The first and second variable speed drive assemblies are preferably high speed, variable speed electric motor assemblies each having a motor body, a motor housing, and a motor shaft with one or more impellers directly and rigidly coupled to the motor shaft via a sacrificial rigid shaft coupling.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: December 31, 2019
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Henry E. Howard, Carl L. Schwarz, Ahmed F. Abdelwahab, Lee J. Rosen, Nick J. Degenstein, Reh-Lin Chen
  • Patent number: 10443603
    Abstract: A method for compression of an incoming feed air stream using at least two variable speed compressor drive assemblies controlled in tandem is provided. The first variable speed drive assembly drives at least one compression stage in the lower pressure compressor unit driven while the second variable speed drive assembly drives higher pressure compression stage disposed either in the common air compression train or the split functional compression train of the air separation plant. The first and second variable speed drive assemblies are preferably high speed, variable speed electric motor assemblies each having a motor body, a motor housing, and a motor shaft with one or more impellers directly and rigidly coupled to the motor shaft via a sacrificial rigid shaft coupling.
    Type: Grant
    Filed: October 15, 2015
    Date of Patent: October 15, 2019
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Henry E. Howard, Carl L. Schwarz, Ahmed F. Abdelwahab, Lee J. Rosen, Nick J. Degenstein, Reh-Lin Chen
  • Patent number: 10385861
    Abstract: A method for compression of an incoming feed air stream using at least two variable speed compressor drive assemblies controlled in tandem is provided. The first variable speed drive assembly drives at least one compression stage in the lower pressure compressor unit driven while the second variable speed drive assembly drives higher pressure compression stage disposed either in the common air compression train or the split functional compression train of the air separation plant. The first and second variable speed drive assemblies are preferably high speed, variable speed electric motor assemblies each having a motor body, a motor housing, and a motor shaft with one or more impellers directly and rigidly coupled to the motor shaft via a sacrificial rigid shaft coupling.
    Type: Grant
    Filed: October 15, 2015
    Date of Patent: August 20, 2019
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Nick J. Degenstein, Lee J. Rosen, Ahmed F. Abdelwahab, Carl L. Schwarz, Reh-Lin Chen, Henry E. Howard
  • Publication number: 20190234415
    Abstract: A method for compression of an incoming feed air stream using at least two variable speed compressor drive assemblies controlled in tandem is provided. The first variable speed drive assembly drives at least one compression stage in the lower pressure compressor unit driven while the second variable speed drive assembly drives higher pressure compression stage disposed either in the common air compression train or the split functional compression train of the air separation plant. The first and second variable speed drive assemblies are preferably high speed, variable speed electric motor assemblies each having a motor body, a motor housing, and a motor shaft with one or more impellers directly and rigidly coupled to the motor shaft via a sacrificial rigid shaft coupling.
    Type: Application
    Filed: April 11, 2019
    Publication date: August 1, 2019
    Inventors: Henry E. Howard, Carl L. Schwarz, Ahmed F. Abdelwahab, Lee J. Rosen, Nick J. Degenstein, Reh-Lin Chen
  • Publication number: 20190234413
    Abstract: A method for compression of an incoming feed air stream using at least two variable speed compressor drive assemblies controlled in tandem is provided. The first variable speed drive assembly drives at least one compression stage in the lower pressure compressor unit driven while the second variable speed drive assembly drives higher pressure compression stage disposed either in the common air compression train or the split functional compression train of the air separation plant. The first and second variable speed drive assemblies are preferably high speed, variable speed electric motor assemblies each having a motor body, a motor housing, and a motor shaft with one or more impellers directly and rigidly coupled to the motor shaft via a sacrificial rigid shaft coupling.
    Type: Application
    Filed: April 11, 2019
    Publication date: August 1, 2019
    Inventors: Henry E. Howard, Carl L. Schwarz, Ahmed F. Abdelwahab, Lee J. Rosen, Nick J. Degenstein, Reh-Lin Chen
  • Publication number: 20190234414
    Abstract: A method for compression of an incoming feed air stream using at least two variable speed compressor drive assemblies controlled in tandem is provided. The first variable speed drive assembly drives at least one compression stage in the lower pressure compressor unit driven while the second variable speed drive assembly drives higher pressure compression stage disposed either in the common air compression train or the split functional compression train of the air separation plant. The first and second variable speed drive assemblies are preferably high speed, variable speed electric motor assemblies each having a motor body, a motor housing, and a motor shaft with one or more impellers directly and rigidly coupled to the motor shaft via a sacrificial rigid shaft coupling.
    Type: Application
    Filed: April 11, 2019
    Publication date: August 1, 2019
    Inventors: Henry E. Howard, Carl L. Schwarz, Ahmed F. Abdelwahab, Lee J. Rosen, Nick J. Degenstein, Reh-Lin Chen
  • Patent number: 9452401
    Abstract: A commercially viable modular ceramic oxygen transport membrane reforming reactor for producing a synthesis gas that improves the thermal coupling of reactively-driven oxygen transport membrane tubes and catalyst reforming tubes required to efficiently and effectively produce synthesis gas.
    Type: Grant
    Filed: October 7, 2014
    Date of Patent: September 27, 2016
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Sean M. Kelly, Gervase Maxwell Christie, Lee J. Rosen, Charles Robinson, Jamie R. Wilson, Javier E. Gonzalez, Uttam R. Doraswami
  • Publication number: 20160032935
    Abstract: A system and apparatus for compression of an incoming feed air stream using at least two variable speed compressor drive assemblies controlled in tandem is provided. The first variable speed driver assembly drives at least one compression stage in the lower pressure compressor driven while the second variable speed driver assembly drives higher pressure compression stage disposed either in the common air compression train or the split functional compression train of the air separation plant. The first and second variable speed driver assemblies are preferably high speed, variable speed electric motor assemblies each having a motor body, a motor housing, and a motor shaft with one or more impellers directly and rigidly coupled to the motor shaft via a sacrificial rigid shaft coupling.
    Type: Application
    Filed: October 15, 2015
    Publication date: February 4, 2016
    Inventors: Carl L. Schwarz, Ahmed F. Abdelwahab, Lee J. Rosen, Gregory W. Henzler, Henry E. Howard, Thomas J. Crowe
  • Publication number: 20160032934
    Abstract: A method for compression of an incoming feed air stream using at least two variable speed compressor drive assemblies controlled in tandem is provided. The first variable speed driver assembly drives at least one compression stage in the lower pressure compressor unit driven while the second variable speed driver assembly drives higher pressure compression stage disposed either in the common air compression train or the split functional compression train of the air separation plant. The first and second variable speed driver assemblies are preferably high speed, variable speed electric motor assemblies each having a motor body, a motor housing, and a motor shaft with one or more impellers directly and rigidly coupled to the motor shaft via a sacrificial rigid shaft coupling.
    Type: Application
    Filed: October 15, 2015
    Publication date: February 4, 2016
    Inventors: Carl L. Schwarz, Lee J. Rosen, Nick J. Degenstein, Henry E. Howard, Reh-Lin Chen, Ahmed F. Abdelwahab
  • Publication number: 20160033197
    Abstract: A method for compression of an incoming feed air stream using at least two variable speed compressor drive assemblies controlled in tandem is provided. The first variable speed driver assembly drives at least one compression stage in the lower pressure compressor unit driven while the second variable speed driver assembly drives higher pressure compression stage disposed either in the common air compression train or the split functional compression train of the air separation plant. The first and second variable speed driver assemblies are preferably high speed, variable speed electric motor assemblies each having a motor body, a motor housing, and a motor shaft with one or more impellers directly and rigidly coupled to the motor shaft via a sacrificial rigid shaft coupling.
    Type: Application
    Filed: October 15, 2015
    Publication date: February 4, 2016
    Inventors: Nick J. Degenstein, Lee J. Rosen, Ahmed F. Abdelwahab, Carl L. Schwarz, Reh-Lin Chen, Henry E. Howard
  • Publication number: 20160033196
    Abstract: A method for compression of an incoming feed air stream using at least two variable speed compressor drive assemblies controlled in tandem is provided. The first variable speed driver assembly drives at least one compression stage in the lower pressure compressor unit driven while the second variable speed driver assembly drives higher pressure compression stage disposed either in the common air compression train or the split functional compression train of the air separation plant. The first and second variable speed driver assemblies are preferably high speed, variable speed electric motor assemblies each having a motor body, a motor housing, and a motor shaft with one or more impellers directly and rigidly coupled to the motor shaft via a sacrificial rigid shaft coupling.
    Type: Application
    Filed: October 15, 2015
    Publication date: February 4, 2016
    Inventors: Henry E. Howard, Carl L. Schwarz, Ahmed F. Abdelwahab, Lee J. Rosen, Nick J. Degenstein, Reh-Lin Chen
  • Patent number: 9238201
    Abstract: A method and apparatus for producing heat used in a synthesis gas production process is provided. The disclosed method and apparatus include a plurality of tubular oxygen transport membrane elements adapted to separate oxygen from an oxygen containing stream contacting the retentate side of the membrane elements. The permeated oxygen is combusted with a hydrogen containing synthesis gas stream contacting the permeate side of the tubular oxygen transport membrane elements thereby generating a reaction product stream and radiant heat. The present method and apparatus also includes at least one catalytic reactor containing a catalyst to promote the steam reforming reaction wherein the catalytic reactor is surrounded by the plurality of tubular oxygen transport membrane elements. The view factor between the catalytic reactor and the plurality of tubular oxygen transport membrane elements radiating heat to the catalytic reactor is greater than or equal to 0.5.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: January 19, 2016
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Sean M. Kelly, Brian R. Kromer, Michael M. Litwin, Lee J. Rosen, Gervase Maxwell Christie, Jamie R. Wilson, Lawrence W. Kosowski, Charles Robinson
  • Patent number: 9180419
    Abstract: A method and apparatus for producing a synthesis gas product having one or more oxygen transport membrane elements thermally coupled to one or more catalytic reactors such that heat generated from the oxygen transport membrane element supplies endothermic heating requirements for steam methane reforming reactions occurring within the catalytic reactor through radiation and convention heat transfer. A hydrogen containing stream containing no more than 20 percent methane is combusted within the oxygen transport membrane element to produce the heat and a heated combustion product stream. The heated combustion product stream is combined with a reactant stream to form a combined stream that is subjected to the reforming within the catalytic reactor. The apparatus may include modules in which tubular membrane elements surround a central reactor tube.
    Type: Grant
    Filed: November 26, 2012
    Date of Patent: November 10, 2015
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Sean M. Kelly, Brian R. Kromer, Michael M. Litwin, Lee J. Rosen, Gervase Maxwell Christie, Jamie R. Wilson, Lawrence W. Kosowski, Charles Robinson
  • Publication number: 20150098872
    Abstract: A commercially viable modular ceramic oxygen transport membrane reforming reactor for producing a synthesis gas that improves the thermal coupling of reactively-driven oxygen transport membrane tubes and catalyst reforming tubes required to efficiently and effectively produce synthesis gas.
    Type: Application
    Filed: October 7, 2014
    Publication date: April 9, 2015
    Inventors: Sean M. Kelly, Gervase Maxwell Christie, Lee J. Rosen, Charles Robinson, Jamie R. Wilson, Javier E. Gonzalez, Uttam R. Doraswami