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:
Sep. 22, 1998
Filed:
May. 14, 1997
Hamid Olia, Wallisellen, CH;
Asea Brown Boveri AG, Baden, CH;
Abstract
The device for precontrolling the feedwater quantity of a cooling-air temperature controller (1) for a once-through cooling-air cooler (2) in combined power plant systems comprises a function element which has as inputs the signals corresponding to the air-outlet desired temperature (.THETA..sub.a soll), the air-inlet temperature (.THETA..sub.e), the air volume flow (M), the main steam pressure (p) and the water-inlet temperature (.theta..sub.e), and as outputs the signals of the approximated precontrolled feedwater volume flow (m.sub.FFO) and the controller gain (VR). A correcting quantity depending on the load (L) and the ambient temperature (T.sub.U) is additionally introduced for operation in the unsaturated temperature range.