| 摘要 |
<p>The invention concerns a tube bundle comprising a plurality of parallel channels (42) and a plurality of heat-exchanging surfaces (24) in heat-exchanging relationship with a gas stream passing through the bundle. Each of the surfaces (24) comprises open or closed cut-outs (22) wherein are arranged the parallel channels (42). They comprise a single-piece separating element (20) consisting of a sheet metal strip punched and accordion-folded so as to delimit the heat-exchanging surfaces (24). Said surfaces are separated from one another by folded edges (30) of the strip. Openings (321) are provided in the folded edges (30) to allow through the gas stream.</p> |
