Component wall of a hot gas component

1. A component wall of a hot-gas component for a gas turbine, which, in a monolithically double-walled design, comprises:

an outer wall, which is hotter during operation, and an inner wall, which is colder during operation, and whose interior space arranged therebetween is basically subdivided by partition walls extending between the inner wall and the outer wall,

wherein a coolant is able to flow into the interior space through inlet openings arranged in the inner wall and is able to flow out of the interior space through outlet openings arranged in the outer wall,

wherein provision is made in the interior space of at least one first cavity which is directly connected, as an inlet cavity, only to at least one of the inlet openings, without being directly connected to outlet openings, and

wherein, immediately adjacent to the at least one inlet cavity, provision is made of at least one second cavity which is directly connected, as an outlet cavity, only to at least one of the outlet openings, without being directly connected to inlet openings,

wherein the partition wall subdividing the respective inlet cavity from the outlet cavity adjacent thereto has at least one through-opening for conducting the coolant from the respective inlet cavity into the outlet cavity, and

wherein at least one means is provided for increasing the material temperature of the inner wall.

2. The component wall as claimed in claim 1 , further comprising:

multiple inlet cavities and multiple outlet cavities and also multiple partition walls, which subdivide the interior space accordingly, as well as multiple inlet openings and multiple outlet openings,

wherein along a transverse extent of the component wall, inlet cavities and outlet cavities are arranged so as to alternate with one another, and at least every second partition wall, which subdivides the interior space accordingly, in each case has at least one through-opening for conducting coolant from the respective inlet cavity into the immediately adjacent outlet cavity.

3. The component wall as claimed in claim 1 ,

wherein the respective inlet cavity and the at least one inlet opening assigned thereto are configured for impingement cooling of the outer wall, which is hotter during operation.

4. The component wall as claimed in claim 1 ,

wherein, as a means, the partition wall having at least one through-opening is configured for jet impingement on the inner wall, which is cooler during operation, in the region of the outlet cavity by coolant which is heated during operation.

5. The component wall as claimed in claim 1 ,

wherein, as means, provision is made on an inner surface, delimiting the outlet cavity, of the inner wall of elements for stimulating the transfer of heat.

6. The component wall as claimed in claim 1 ,

wherein the outlet cavity is separated by two partition walls from two inlet cavities adjacent on both sides, and in that through-openings are arranged in only one of the two respective partition walls.

7. The component wall as claimed in claim 1 ,

wherein each of the inlet cavities is directly connected to in each case multiple inlet openings and each of the outlet cavities is directly connected to in each case multiple outlet openings, and in which in each case multiple through-openings are arranged in the respective partition walls.

8. The component wall as claimed in claim 1 ,

wherein alternately arranged inlet cavities and outlet cavities, with the formation of multiple flow paths, are each formed to be triangular in the wall section and arranged so as to at least partially overlap one another.

9. The component wall as claimed in claim 1 ,

wherein the component wall is produced by an additive method.

10. A hot-gas component comprising:

a component wall which is designed as claimed in claim 1 .