| 摘要 |
In a heat exchanger (10) for transferring heat from a first fluid to a second fluid, which heat exchanger (10) comprises one or more flow passages (12) for a first fluid, the outer wall (26) of these passages is in heat-tranferring contact wiht a flow body (20) made from metal foam for a second fluid. This metal foam has a gradient of the volume density of the metal, so that it is possible to achieve a favourable equilibrium between heat transfer and conduction, on the one hand, and flow resistance, on the other hand.
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