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Real-time combustion controller

United States Patent

*** EXPIRED ***
February 4, 1997
View the Complete Patent at the US Patent & Trademark Office
A method and system of regulating the air to fuel ratio supplied to a burner to maximize the combustion efficiency. Optical means are provided in close proximity to the burner for directing a beam of radiation from hot gases produced by the burner to a plurality of detectors. Detectors are provided for sensing the concentration of, inter alia, CO, CO.sub.2, and H.sub.2 O. The differences between the ratios of CO to CO.sub.2 and H.sub.2 O to CO are compared with a known control curve based on those ratios for air to fuel ratios ranging from 0.85 to 1.30. The fuel flow is adjusted until the difference between the ratios of CO to CO.sub.2 and H.sub.2 O to CO fall on a desired set point on the control curve.
Lindner; Jeffrey S. (Starkville, MS), Shepard; W. Steve (Starkville, MS), Etheridge; John A. (Starkville, MS), Jang; Ping-Rey (Starkville, MS), Gresham; Lawrence L. (Starkville, MS)
Mississippi State University (Mississippi State, MS)
08/ 283,795
August 1, 1994
This invention was made with U.S. Government support under Contract No. DE-FG02-93CH10575 awarded by the Department of Energy. The U.S. Government may have certain rights in this invention.