Gary Thomas Dobbs

US Patent:

20100151397, Jun 17, 2010

Filed:

Dec 14, 2009

Appl. No.:

12/636933

Inventors:

John T. FARRELL - High Ridge NJ, US
San CHHOTRAY - Centerville VA, US
Gary T. DOBBS - Fairfax VA, US
Manuel S. ALVAREZ - Warrenton VA, US
Patrick D. SCHWEITZER - Broad Run VA, US

Assignee:

ExxonMobile Research and Engineering Company - Annandale NJ

International Classification:

F23N 5/08
F23J 7/00
F23N 5/24

US Classification:

431 4, 431 75, 110191, 110342

Abstract:

Method of controlling the operation of a combustion device to provide safe and reliable operation while reducing NOx emission that includes providing a flow of fuel and diluent at a determined volume ratio to a flame in the combustion device; providing a flame stability sensor to generate a measurement of a characteristic of the flame, providing a flow measurement for each of the fuel and diluent, and controlling the determined volume ratio of fuel:diluent using the measurement from the flame stability sensor and/or flow measurements. A combustion system incorporating this method also is included.

US Patent:

20140172368, Jun 19, 2014

Filed:

Dec 10, 2013

Appl. No.:

14/101677

Inventors:

Weichang Li - Annandale NJ, US
Gary T. Dobbs - Fairfax VA, US
Limin Song - West Windsor NJ, US
Peng Xu - Annandale NJ, US
Krishnan Kumaran - Raritan NJ, US
Mark M. Disko - Glen Gardner NJ, US
Jeffrey M. Grenda - Houston TX, US
San Chhotray - Centreville VA, US
Amy B. Herhold - Short Hills NJ, US
Duane R. McGregor - Gainesville VA, US

Assignee:

EXXONMOBIL RESEARCH AND ENGINEERING COMPANY - Annandale NJ

International Classification:

G01M 99/00
G06F 17/11

US Classification:

702182

Abstract:

Systems and methods for multi-channel detection of an instability in a furnace comprising a plurality of detectors are disclosed. Each of a plurality of detectors provides a first measurement related to the plurality of burners when the furnace is operating in a stable condition. A stable signal component representation is determined based on the first measurement from each of the plurality of detectors. Each of a plurality of detectors provides a second measurement related to the plurality of burners when the furnace is operating in an unknown state. An unstable signal component representation is determined based on the stable signal component representation and a second measurement from each of the plurality of detectors. An instability is detected based on the unstable signal component representation and an instability threshold.

US Patent:

20140172370, Jun 19, 2014

Filed:

Dec 10, 2013

Appl. No.:

14/101626

Inventors:

Weichang Li - Annandale NJ, US
Gary T. Dobbs - Fairfax VA, US
Limin Song - West Windsor NJ, US
Peng Xu - Annandale NJ, US
Krishnan Kumaran - Raritan NJ, US
Mark M. Disko - Glen Gardner NJ, US
Jeffrey M. Grenda - Houston TX, US
San Chhotray - Centreville VA, US
Amy B. Herhold - Short Hills NJ, US
Duane R. McGregor - Gainesville VA, US

Assignee:

EXXONMOBIL RESEARCH AND ENGINEERING COMPANY - Annandale NJ

International Classification:

F23N 5/24

US Classification:

702183

Abstract:

Systems and method for identifying an unstable subset of burners from among a plurality of burners in a furnace are also disclosed. At least one measurement is obtained from each of the plurality of burners. An instability associated with the furnace is detected. An unstable signal matrix associated with the instability is computed based on the at least one measurement from each of the plurality of burners. An unstable subset of burners is identified based at least in part on the unstable signal matrix.