Abstract: An annular recuperator for use with a combustion power plant and in particular with a turbine engine. The annular recuperator is constructed from a plurality of stacked formed plates alternately sandwiching radially aligned exhaust passageways with partially radially, partially circumferentially aligned air passageways, in heat exchange relationship. The air passageways containing generally Z shaped finned passageways interconnecting axially aligned inlet and outlet manifolds within the annular core.

Abstract: Special reinforcing members are provided for high pressure containment in critical portions of a thin plate-and-fin heat exchanger. These comprise a plurality of hoops of U-shaped cross section bridging the juncture lines of the heat exchanger manifolds, together with leading edge straps which provide structural reinforcement in the region between the manifolds and the conventional side bar reinforcing members in the central core section. The ends of the leading edge straps are structurally tied respectively to the side bars and the manifold reinforcing hoops.