James E Burkhart

US Patent:

20110252796, Oct 20, 2011

Filed:

Apr 19, 2011

Appl. No.:

13/089984

Inventors:

James A. Burkhart - Strongsville OH, US

Assignee:

Burkhart Technologies, LLC - Strongsville OH

International Classification:

F03G 7/00
F01K 27/00

US Classification:

606412, 60643

Abstract:

A thermodynamic system and method of producing useful work includes providing a working fluid and a fluid pump, or compressor, for pumping the working fluid in a cycle. A thermal input is provided for supplying heat to the working fluid. An expansion device downstream of the thermal input converts motion of the working fluid to useful work. A heat pump is provided. A number of different means of implementing the heat pump are presented, including direct transfer of working fluid mass flow. The heat pump pumps heat from one portion of the working fluid to another portion of the working fluid. For some applications, a regenerator, or recuperator, may be used to transfer heat from a high temperature portion of the working fluid to a lower temperature portion.

US Patent:

47325976, Mar 22, 1988

Filed:

Apr 22, 1986

Appl. No.:

6/854600

Inventors:

James A. Burkhart - Olmsted Falls OH
Ralph Greenberg - New York NY

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

F25J 302

US Classification:

62 24

Abstract:

A method for the separation of gaseous mixtures such as air and for producing medium purity oxygen, comprising compressing the gaseous mixture in a first compressor to about 3. 9-4. 1 atmospheres pressure, passing said compressed gaseous mixture in heat exchange relationship with sub-ambient temperature gaseous nitrogen, dividing the cooled, pressurized gaseous mixture into first and second streams, introducing the first stream into the high pressure chamber of a double rectification column, separating the gaseous mixture in the rectification column into a liquid oxygen-enriched stream and a gaseous nitrogen stream and supplying the gaseous nitrogen stream for cooling the compressed gaseous mixture, removing the liquid oxygen-enriched stream from the low pressure chamber of the rectification column and pumping the liquid, oxygen-enriched steam to a predetermined pressure, cooling the second stream, condensing the cooled second stream and evaporating the oxygen-enriched stream in an evaporator-condenser, delivering the condensed second stream to the high pressure chamber of the rectification column, and heating the oxygen-enriched stream and blending the oxygen-enriched stream with a compressed blend-air stream to the desired oxygen concentration.

US Patent:

20150113986, Apr 30, 2015

Filed:

Oct 23, 2014

Appl. No.:

14/522117

Inventors:

- Strongsville OH, US
James A. Burkhart - Strongsville OH, US

International Classification:

F24J 3/08
F01K 25/08

US Classification:

606412, 60671

Abstract:

A thermodynamic system and method for performing work includes a working fluid and a fluid pump for pumping the working fluid through a cycle. A thermal input supplies heat to the working fluid. An expansion device downstream of the thermal input converts at least the heat of the working fluid to useful work. A heat exchanger downstream of the expansion device has a first portion to transfer heat from downstream said expansion device to a second portion at or upstream of said thermal input. A conversion device expands the working fluid with constant enthalpy from a higher to a lower pressure. The conversion device may be part of a heat pump pumping heat from one portion of said working fluid to another portion of the working fluid.

Author:

James A. Burkhart

ISBN #:

0130269557

Author:

James A. Burkhart

ISBN #:

0131350617

Author:

James A. Burkhart

ISBN #:

0131350870

Author:

James A. Burkhart

ISBN #:

0131350951

Author:

James A. Burkhart

ISBN #:

0133669556

Author:

James A. Burkhart

ISBN #:

0136152112

Author:

James A. Burkhart

ISBN #:

0876268475

Author:

James Burkhart

ISBN #:

0819133191