Abstract: A twisted-louver high performance heat exchanger fin assembly includes a plurality of fin elements each having a louver formed therein. The louvers include first and second portions connected by a twisted portion such that the first and second portions cross in an X-shaped profile.

Abstract: A twisted-louver high performance heat exchanger fin assembly includes a plurality of fin elements each having a louver formed therein. The louvers include first and second portions connected by a twisted portion such that the first and second portions cross in an X-shaped profile.

Abstract: A high performance louvered fin for a heat exchanger includes a base wall extending longitudinally to form a strip having a longitudinal axis. The high performance louvered fin includes a plurality of entrance louvers in the base wall extending outwardly at a predetermined angle in a first direction from the base wall. The high performance louvered fin also includes a plurality of exit louvers in the base wall extending outwardly at a predetermined angle in a second direction from the base wall reversed from the first direction. The entrance louvers and the exit louvers extend in a direction parallel to the longitudinal axis and are spaced laterally. The high performance louvered fin further includes a turnaround rib in the base wall extending laterally and generally perpendicular to the longitudinal axis between the entrance louvers and the exit louvers.

Abstract: A fin for use in a heat exchanger of the type comprising a plurality of fluid carrying tubes for transporting heat exchange fluid is disclosed. The fin includes a generally planar base 24 having a longitudinal axis generally perpendicular to the direction of air flowing entering the heat exchanger 10 and a transverse axis generally parallel to the direction of air flow. The axes define a main plane disposed at a predetermined angle (.theta.) relative to the direction of air flow entering the heat exchanger. The fin 22 further includes a plurality of apertures 30 for receiving tubes 20 therethrough and a plurality of louvres 32 disposed on the base 24 extending generally parallel to the longitudinal axis of the base. The angle .theta. can be between 140 and 175 degrees to the direction of air flow entering the heat exchanger.