175 Fluidfluid heat exchangers

Figure 17.8 illustrates the structure of a fluid-fluid heat exchanger constructed from ERG DUOCEL® open-celled aluminum foam.* Heat exchange criteria are analysed in Chapter 13 of this Design Guide. Open porosity, low relative

Figure 17.8 DUOCEL® foamed aluminum used as the heat-exchange medium for the space shuttle atmospheric control system. (Courtesy of ERG)

density and high thermal conductivity of the cell edges are essential. The DUOCEL range of metal foams, which include both aluminum and copper, offer this combination of properties. The figure shows a foamed aluminum heat exchanger for a space-shuttle atmospheric control system.

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