DESCRIZIONE
In one example, a portion of a shell includes a shell wall portion that has an interior wall portion and an exterior wall portion located near the interior wall portion. In addition, fluid passageways are disposed between the interior wall portion and the exterior wall portion. One or more of the fluid passageways are defined in part by one or both of the interior wall portion and the exterior wall portion. The fluid passageways form part of heat exchanger that is integrated in the shell.