John H Royal

US Patent:

6425250, Jul 30, 2002

Filed:

Feb 8, 2001

Appl. No.:

09/778830

Inventors:

Arun Acharya - East Amherst NY
John H. Royal - Grand Island NY
Dante P. Bonaquist - Grand Island NY
Bayram Arman - Grand Island NY
Christian F. Gottzmann - Clarence NY

Assignee:

Praxair Technology, Inc. - Danbury CT

International Classification:

F25B 900

US Classification:

62 6, 62434

Abstract:

A system for providing refrigeration to a heat load, especially over a larger temperature range and at a cryogenic temperature, wherein pulse tube refrigeration cools a heat transfer medium to provide higher level refrigeration to a refrigeration fluid, and lower level refrigeration is provided to the refrigeration fluid using a non-pulse tube system.

US Patent:

6430938, Aug 13, 2002

Filed:

Oct 18, 2001

Appl. No.:

09/978765

Inventors:

John Henri Royal - Grand Island NY
Christian Friedrich Gottzmann - Clarence NY
Arun Acharya - East Amherst NY
Gary D. Lang - Naperville IL

Assignee:

Praxair Technology, Inc. - Danbury CT

International Classification:

F25B 900

US Classification:

62 6, 62 471, 62 511

Abstract:

A cryogenic vessel system for containing cryogenic fluid wherein heat leak into the vessel interior is counteracted by refrigeration generated from energy provided by a pulse generator.

US Patent:

6523348, Feb 25, 2003

Filed:

May 2, 2001

Appl. No.:

09/846361

Inventors:

Arun Acharya - East Amherst NY
Christian Friedrich Gottzmann - Clarence NY
Bayram Arman - Grand Island NY
Dante Patrick Bonaquist - Grand Island NY
John Henri Royal - Grand Island NY

Assignee:

Praxair Technology, Inc. - Danbury CT

International Classification:

F01K 2508

US Classification:

60651, 60671

Abstract:

A method of conducting a process involving the generation of steam in which a hot process stream is generated. The hot process stream can be generated in any manner and can include a burner section of a steam methane reformer, a gas turbine of an integrated combined cycle, a combustion chamber used to pre-heat incoming air and oxygen for a blast furnace, an oxygen transport membrane system, and a gas turbine or natural gas engine that provided to compress air in a cryogenic air separation unit. Heat from the hot process stream is transferred to a thermoacoustic engine to recover work at high temperatures and to generate an intermediate temperature process stream therefrom. The intermediate temperature process stream is introduced to a steam generator to generate the steam.

US Patent:

6588224, Jul 8, 2003

Filed:

Jul 10, 2002

Appl. No.:

10/191528

Inventors:

Bayram Arman - Grand Island NY
Dante Patrick Bonaquist - Grand Island NY
John Henri Royal - Grand Island NY
Arun Acharya - East Amherst NY

Assignee:

Praxair Technology, Inc. - Danbury CT

International Classification:

F25B 2700

US Classification:

622383, 623231, 622386, 62197, 62467, 62 6

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.

US Patent:

6604364, Aug 12, 2003

Filed:

Nov 22, 2002

Appl. No.:

10/301706

Inventors:

Bayram Arman - Grand Island NY
Dante Patrick Bonaquist - Grand Island NY
John Henri Royal - Grand Island NY

Assignee:

Praxair Technology, Inc. - Danbury CT

International Classification:

F25B 900

US Classification:

62 6, 60520, 62467

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.

US Patent:

6640557, Nov 4, 2003

Filed:

Oct 23, 2002

Appl. No.:

10/277884

Inventors:

Bayram Arman - Grand Island NY
Arun Acharya - East Amherst NY
Dante Patrick Bonaquist - Grand Island NY
John Henri Royal - Grand Island NY

Assignee:

Praxair Technology, Inc. - Danbury CT

International Classification:

F17C 1300

US Classification:

62 507, 62434, 622592, 174 155, 505100

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.

US Patent:

6644038, Nov 11, 2003

Filed:

Nov 22, 2002

Appl. No.:

10/301712

Inventors:

Arun Acharya - East Amherst NY
Bayram Arman - Grand Island NY
John Henri Royal - Grand Island NY
Dante Patrick Bonaquist - Grand Island NY

Assignee:

Praxair Technology, Inc. - Danbury CT

International Classification:

F25B 900

US Classification:

62 6, 62335

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.

US Patent:

6668581, Dec 30, 2003

Filed:

Oct 30, 2002

Appl. No.:

10/283309

Inventors:

Arun Acharya - East Amherst NY
John Henri Royal - Grand Island NY
Raymond Paul Roberge - Chappaqua NY
Bayram Arman - Grand Island NY
Brian Michael Meredith - Amherst NY

Assignee:

Praxair Technology, Inc. - Danbury CT

International Classification:

G25J 100

US Classification:

62615

Abstract:

A system for providing industrial gas to a use point in relatively small quantities that would otherwise require the use of high pressure gas cylinders, wherein industrial gas is generated from a feed, liquefied using refrigeration generated by a refrigeration system, and stored in a storage vessel prior to provision to the use point. The preferred refrigeration system is a pulse tube system powered by gas associated with the industrial gas generation system.