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Closed loop steam cooled airfoil

United States Patent

April 18, 2006
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
An airfoil, a method of manufacturing an airfoil, and a system for cooling an airfoil is provided. The cooling system can be used with an airfoil located in the first stages of a combustion turbine within a combined cycle power generation plant and involves flowing closed loop steam through a pin array set within an airfoil. The airfoil can comprise a cavity having a cooling chamber bounded by an interior wall and an exterior wall so that steam can enter the cavity, pass through the pin array, and then return to the cavity to thereby cool the airfoil. The method of manufacturing an airfoil can include a type of lost wax investment casting process in which a pin array is cast into an airfoil to form a cooling chamber.
Widrig; Scott M. (Hobe Sound, FL), Rudolph; Ronald J. (Juno Beach, FL), Wagner; Gregg P. (Apopka, FL)
Siemens Power Generation, Inc. (Orlando, FL)
10/ 308,280
December 3, 2002
GOVERNMENT RIGHTS STATEMENT This invention was conceived under United States Department of Energy Contract DE-AC05-00 OR22725. The United States Government has certain rights hereunder.