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:
Feb. 27, 2001
Filed:
Oct. 25, 1999
Eberhard Wittchow, Erlangen, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
In a once-though steam generator having a double-flue configuration, a first gas flue is followed on the fuel-gas side, by way of a horizontal gas flue, by a second gas flue. In a once-through steam generator of this type, which is to have a particularly long lifetime even in the case of frequent start-up operations, according to the invention a number of steam generator tubes, connected in parallel for a flow medium to flow through them, are connected to one another to form an evaporator heating surface which is part of a containing wall of the first gas flue. The steam generator tubes which form the evaporator heating surface opening on an exit into an outlet header which is common to them and is disposed at a lower height in comparison with the bottom edge of the horizontal gas flue and which is followed, on the flow-medium side, by a bulkhead heating surface.