Heat Shield Element

• US 20080127652A1
• Filed: 12/15/2005
• Published: 06/05/2008
• Est. Priority Date: 12/16/2004
• Status: Abandoned Application

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Putz, Heinrich
• Application Number:
  US11/793,195
• Publication Number:
  US 20080127652A1
• Time in Patent Office: Days
• US Class Current: 60/752
• CPC Class Codes: F23R 2900/03044 Impingement cooled combustion chamber walls or subassemblies
• CPC Class Codes: F23R 3/005 Combined with pressure or heat exchangers

Abstract

There is described a heat shield element comprising a wall that is provided with a hot face which can be impinged upon by a hot medium and a cold face located opposite the hot face. The heat shield element further comprises a coolant distribution system which is assigned to the cold face. In order to convectively cool the heat shield element in a particularly effective manner, a plurality of cooling ducts which extend along the hot face are provided within the wall. Said cooling ducts are fluidically connected to the distribution system such that the coolant can be distributed to the individual cooling ducts with the aid of the distribution system. The convectively cooled heat shield element can be used in a particularly advantageous fashion for the heat-resistant lining of a combustion chamber, especially a combustion chamber of a gas turbine system.

Claims

1-20. -20. (canceled)

21. A heat shield element, comprising:

a wall with a hot face for the application of a hot medium;

a cold face opposite to the hot face;

a distribution system for a cooling medium assigned to the cold face; and

a plurality of cooling ducts in the wall along the hot face, wherein the cooling ducts are fluidically connected to the distribution system.

22. The heat shield element as claimed in claim 21, wherein the cooling ducts have an inlet and an outlet for the cooling medium.

23. The heat shield element as claimed in claim 22, wherein the wall has a first side area and a second side area located opposite to the first side area, and wherein the inlet of the cooling duct is disposed in the first side area and the outlet is disposed in the second side area.

24. The heat shield element as claimed in claim 21, wherein an inlet and an outlet of the cooling ducts are disposed in a first side area of the wall.

25. The heat shield element as claimed in claim 23, wherein at least on cooling duct has an U-turn in the second side area of the wall such that during cooling ducts adjacent to one another and connected via the U-turn are flowed through in opposite directions.

26. The heat shield element as claimed in claim 25, wherein the cooling duct is serpentine in shape.

27. The heat shield element as claimed in claim 22, wherein the cooling ducts are disposed closer to the hot face than to the cold face of the wall.

28. The heat shield element as claimed in claim 27, wherein the distance of the cooling ducts from the hot face amounts to between 20% and 40% of a thickness of the wall.

29. The heat shield element as claimed in one of claims 21, wherein the distribution system is mounted directly on the cold face of the wall.

30. The heat shield element as claimed in claim 21, wherein a retaining bolt has a retaining aperture surrounded by a plurality of feed ducts and a seal, wherein the cooling medium is supplied via the feed ducts.

31. The heat shield element as claimed in claim 22, wherein the outlet of a cooling duct is mounted on the cold face.

32. The heat shield element as claimed in claim 21, wherein the heat shield element consists of a high-temperature-resistant metal or metal alloy.

33. The heat shield element as claimed in claim 32, wherein a length of the heat shield element from an outer edge of the first side area to an outer edge of the second side area is between 200 mm and 400 mm.

34. The heat shield element as claimed in claim 33, wherein an impingement cooling of a part of the heat shield element is effected in the feed duct by the cooling medium.

35. A combustion chamber, comprising:

a supporting structure on which a plurality of heat shield elements are mounted, wherein the heat shield element has;

a wall with a hot face for the application of a hot medium,

a cold face opposite to the hot face,

a distribution system for a cooling medium assigned to the cold face, and

a plurality of cooling ducts in the wall along the hot face, wherein the cooling ducts are fluidically connected to the distribution system.

36. The combustion chamber as claimed in claim 35, wherein the heat shield element is fixed to the supporting structure via a retaining bolt.

37. The combustion chamber as claimed in claims 35, wherein the supporting structure has at least one feed duct to supply the cooling medium to the heat shield element via the feed duct.

38. The combustion chamber as claimed in claim 37, wherein the feed duct leads into the distribution system.

39. A gas turbine system, comprising:

a combustion chamber having;

a supporting structure on which a plurality of heat shield elements are mounted, wherein the heat shield element comprises;

a wall with a hot face for the application of a hot medium,

a cold face opposite to the hot face,

a distribution system for a cooling medium assigned to the cold face, and

a plurality of cooling ducts in the wall along the hot face, wherein the cooling ducts are fluidically connected to the distribution system.

40. The gas turbine system as claimed in claim 39, wherein from a compressor cooling air is tapped for cooling the combustion chamber.