PERFORATED FINS OF HEAT EXCHANGER Russian patent published in 2014 - IPC F28D9/00 

FIELD: heating.

SUBSTANCE: plate-fin heat exchanger comprises a folded finned sheet comprising the fins, and the finned sheet comprises a plurality of perforations, and such plurality of perforations is located on the finned sheet in parallel rows, when such finned sheet is in the unfolded state. Such parallel rows of perforations on the finned sheet comprise a first distance between the parallel rows of perforations (S1), a second distance between the successive perforations in the parallel row of perforations (S2), a third distance (or shifting) between the perforations in adjacent parallel rows of perforations (S3), and the diameter (D) of the perforation. The ratio of the first distance between the parallel rows of perforations to the diameter of the perforation (S1/D) is in the range of 0.75-2.0. And the angle between the fins and the parallel rows of perforations is less than or equal to five degrees (≤5°).

EFFECT: improving the geometry of the perforated fin.

18 cl, 3 dwg, 2 tbl