The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 27, 1977
Filed:
Sep. 03, 1976
Lyle F Martz, Penn Hills, PA (US);
Westinghouse Electric Corporation, Pittsburgh, PA (US);
Abstract
A boiler control regulates the input fuel and air to satisfy load demand. Simultaneously, the air flow is adjusted by an air flow control to correct for changes in fuel heating value by means of a circuit which operates in response to outlet steam flow and input mass fuel flow to determine the difference in presumed heat input and actual heat output and, by inference from the heat imbalance or error, a change in fuel heating value. The heat error is used to adjust the air flow demand to the air flow control. In another embodiment, boiler heat pickup is derived to remove from the heat imbalance any heat input changes other than fuel heating value changes.