Patent ID: 8025095

Claim:
A heat exchanger, comprising: a housing jacket which is open at both ends, and wherein: a bundle including a plurality of individual tubes which are spaced apart from one another is located inside the housing jacket, the individual tubes of the bundle of tubes are held firmly and in a seal-forming fashion by end-side tube bottoms, the tube bottoms form end-side closures of the housing jacket, a first tube bottom of the tube bottoms is directly connected to the housing jacket firmly and in a seal-forming fashion, a second tube bottom of the tube bottoms is mounted within the housing jacket housing in an axially displaceable and seal-forming fashion, the individual tubes are configured axially on an inside of the individual tubes for a first hot medium to flow through the individual tubes, the tubes are located axially in a space which is formed by the housing jacket, wherein the housing jacket is configured for a second medium which is cooler than the first hot medium to flow axially through the housing jacket, the individual tubes and at least the second tube bottom are located on a hot inlet side of the heat exchanger and are made of a heat-resistant metal, the housing jacket is composed of a material which is not heat-resistant, at least at a temperature at which the first medium enters the heat exchanger, the second tube bottom located on the inlet side for the first hot medium has, before the second tube bottom bears against the housing jacket, an intermediate region which is subjected directly to the second medium within the housing jacket and has dimensions which ensure cooling to a temperature at which the material of the housing jacket still has sufficient resistance to heat.