Jeremiah J Rauch

US Patent:

20090241595, Oct 1, 2009

Filed:

Mar 27, 2008

Appl. No.:

12/056956

Inventors:

Murali Chinta - E. Amherst NY, US
Robert Leroy Baker - Williamsville NY, US
Jeremiah Rauch - Grand Island NY, US

Assignee:

PRAXAIR TECHNOLOGY, INC. - Danbury CT

International Classification:

F25J 3/04

US Classification:

62644

Abstract:

A distillation method and apparatus having application to the distillation of air in which liquid production make is varied by varying the pressure ratio across a turboexpander used in generating refrigeration. The pressure ratio is varied by varying the pressure of a compressed stream fed to the turboexpander. This is done by solely compressing such compressed stream by a first booster compressor during a low rate of production of liquid products. During a high rate of production of liquid products, the compressed stream is also compressed within a second booster compressor. The second booster compressor is driven by a variable speed drive to allow a variety of liquid production rates between the low level of liquid production and the high level of liquid production.

US Patent:

20100251766, Oct 7, 2010

Filed:

Apr 3, 2009

Appl. No.:

12/418056

Inventors:

Jeremiah James Rauch - Clarence Center NY, US
Robert Leroy Baker - Williamsville NY, US
Gerald T. O'Connor - West Seneca NY, US
Michael John Stanko - Grand Island NY, US
Murali Chinta - Toledo OH, US

International Classification:

F25J 3/00
F25B 11/02
F25D 9/00

US Classification:

62645, 62 87

Abstract:

The present invention provides a method and apparatus for generating refrigeration in a process operating at sub-ambient temperatures in which the refrigeration is generated by a turboexpander. The turboexpander is coupled to a generator controlled so that its speed is maintained at a setpoint through electromagnetic braking and its power output is maintained at line matching voltage and frequency. The speed control of the generator therefore, also controls the speed of the turboexpander. The setpoint is calculated to be equal to a product of an operational efficiency parameter, U/Cand a square root of twice the enthalpy drop in the flow passing through the turboexpander divided by a product of pi and a diameter of an impeller employed within the turboexpander.

US Patent:

20130192301, Aug 1, 2013

Filed:

Mar 14, 2013

Appl. No.:

13/803195

Inventors:

Jeremiah J. Rauch - Clarence NY, US
Andrew M. Warta - Wheatfield NY, US
Hao Wu - Shanghai, CN
David R. Parsnick - Amherst NY, US
Sophia J. Dowd - Grand Island NY, US

International Classification:

F25J 3/04

US Classification:

62652

Abstract:

A system and method for air separation using a supplemental refrigeration cycle is provided. A portion of the refrigeration required by the air separation plant to produce a liquid product stream is supplied via a supplemental refrigeration circuit configured to direct a cooled refrigerant produced by the turboexpander through the main heat exchanger of the air separation plant. The refrigeration capacity is controlled by removing or adding a portion of the refrigerant in the supplemental refrigeration circuit to adjust the inlet pressure while maintaining a substantially constant volumetric flow rate and substantially constant pressure ratio across the compressor. Removing the refrigerant from the supplemental refrigeration circuit decreases the refrigeration imparted by the supplemental refrigeration circuit and thus decreases the production of the liquid product stream. Adding refrigerant allows for an increase in the refrigeration imparted by the supplemental refrigeration circuit and thus allows for increased production of the liquid product stream.

US Patent:

20220326109, Oct 13, 2022

Filed:

Nov 2, 2021

Appl. No.:

17/517141

Inventors:

Catherine B. Sarigiannis - Grand Island NY, US
Jeremiah J. Rauch - Clarence NY, US
Mårten Källström - Sala, SE

International Classification:

G01M 3/26
F04D 27/00

Abstract:

A method for leak detection in a system including a compressor. A first pressure differential is determined in the system via a first pressure differential indicator (PDI). The first pressure differential is converted into a first flow measurement. A second flow measurement is determined downstream of the compressor using a second PDI. The first flow measurement and the second flow measurement are compared to determine whether a leak exists between the first PDI and the second PDI.

US Patent:

20230113326, Apr 13, 2023

Filed:

Apr 11, 2022

Appl. No.:

17/717193

Inventors:

Henry Edward Howard - Grand Island NY, US
Jeremiah J. Rauch - Clarence NY, US

International Classification:

F25J 1/00
F25J 1/02

Abstract:

A small to mid-scale liquefied natural gas production system and method is provided. The disclosed liquefied natural gas production system employs a nitrogen-based refrigerant, at least one heat exchanger, three turbine/expanders and two or more refrigerant compression stages. The expansion ratio of one turbine/expander is appreciably lower than the expansion ratio of the other turbine/expanders such that the temperature of the exhaust stream from the turbine/expander with the lower expansion ratio is above the critical point temperature of the compressed natural gas containing feed stream but colder than −15 C.

US Patent:

20230115492, Apr 13, 2023

Filed:

Apr 11, 2022

Appl. No.:

17/717189

Inventors:

Henry Edward Howard - Grand Island NY, US
Jeremiah J. Rauch - Clarence NY, US

International Classification:

F25J 1/02
F25J 1/00

Abstract:

A small to mid-scale liquefied natural gas production system and method is provided. The disclosed liquefied natural gas production system employs a nitrogen-based refrigerant, at least one heat exchanger, three turbine/expanders and two or more refrigerant compression stages. The expansion ratio of one turbine/expander is appreciably lower than the expansion ratio of the other turbine/expanders such that the temperature of the exhaust stream from the turbine/expander with the lower expansion ratio is above the critical point temperature of the compressed natural gas feed stream but colder than −15 C.

US Patent:

20210348838, Nov 11, 2021

Filed:

Dec 14, 2020

Appl. No.:

17/120403

Inventors:

Neil M. Prosser - Lockport NY, US
Jeremiah J. Rauch - Clarence NY, US
James R. Handley - East Amherst NY, US
Nathaniel J. Parr - Orchard Park NY, US

International Classification:

F25J 1/00
F25J 1/02

Abstract:

Liquefier arrangements configured for co-production of both liquid natural gas (LNG) and liquid nitrogen (LIN) configured to operate using direct drive motor/generator arrangement for the warm and/or cold booster compressors and turbines. Alternatively, the use of a conventional generator with a bull gear in lieu of the direct drive motor/generator arrangement on the warm turbine and warm booster compressor coupling is also disclosed.

US Patent:

20210348839, Nov 11, 2021

Filed:

Dec 18, 2020

Appl. No.:

17/126220

Inventors:

Jeremiah J. Rauch - Clarence NY, US
Edward Joseph Colman - Grand Island NY, US
Zhengrong Xu - East Amherst NY, US

International Classification:

F25J 1/00
F25J 3/04

Abstract:

A system and method for cryogenic air separation arrangement having a booster loaded liquid turbine for expansion of a liquid air stream or other fluid having liquid-like densities is provided. The disclosed booster loaded liquid turbines are relatively small to provide an aerodynamic and speed match between the turbine and the coupled gas compressor. The coupled gas compressor is a supplemental booster compressor and may be a dedicated warm booster compressor or alternatively a cold booster compressor.