| 摘要 |
In a heat exchanger unit with a plurality of tubes for the circulation of a first fluid and a inner sleeve for the circulation of a second fluid a transverse partition-wall is disposed between the outer shell and the inner sleeve assuming said circulations. Said transverse partition-wall delimits two annular spaces which communicate respectively with external ducts for the admission and discharge of the fluids. The ducts are immediately adjacent to said transverse partition-wall in order to avoid differential expansion under both steady state and transient flow conditions between the outer shell and the tubes of the heat exchanger unit. |
