Finned tube bundle heat exchanger

A heat exchanger comprising an outer elongated shell having a central passage extending therethrough, a pair of header plates having first fluid conduit means associated therewith, a plurality of tubes within said shell and extending longitudinally thereof with their ends sealed within apertures in said header plates, said tubes being in communication with said first conduit means, a plurality of fins stacked on said tubes between the header plates and generally conformably received within said shell, each fin having a plurality of openings defined by annular flanges extending from one surface of each fin receiving the tubes therethrough and a plurality of slits therein providing for liquid flow therethrough and generally axially along the tubes, said fins being stacked with the flanges of one fin abutting the opposite surface of the next adjacent fin to provide for spacing between adjacent fins, and second fluid conduit means associated with said shell for communication thereinto for fluid contact with the fins and the outer surfaces of said tubes.