Finned tube heat exchanger

F - Mech Eng,Light,Heat,Weapons – 28 – F

Patent

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Details

F28F 3/02 (2006.01) F28F 1/32 (2006.01) F28F 3/04 (2006.01)

Patent

CA 2162051

The finned tube heat exchanger (1) has a plurality of elongated heat exchanger tubes (2) arranged parallel to one another and with a cross section, the length (L) of which is a multiple greater than its width (B). The heat exchanger tubes (2) are interconnected by fins (3) extending parallel to the direction of flow (SR) of the cooling air. Parallel adjacent air conduction grooves (7) running in the direction of flow (SR) of the cooling air, open at the fin ends (6) and in zig-zag array are made on at least one side surface of the fins (3). Said grooves are semicircular in cross section and consist of straight groove sections (8) and arc-shaped transition sections (9) steplessly interconnecting said straight sections. The groove sections may also be a component of zig-zag fin sections. Thus the groove sections still run obliquely to the longitudinal run of the fins.

L'invention a pour objet un échangeur de chaleur à tubes à ailettes (1) présentant plusieurs tubes (2) allongés et parallèles, dont la longueur (L) en coupe est un multiple de la largeur (B). Les tubes (2) de l'échangeur de chaleur sont reliés entre eux par des ailettes (3) s'étendant parallèlement au sens de circulation (SR) de l'air de refroidissement. Les ailettes (3) comportent, sur au moins une de leurs faces latérales, des gorges (7) destinées à conduire l'air, ouvertes à l'extrémité des ailettes (6), adjacentes et parallèles, en forme de zigzag et s'étendant dans le sens de circulation (SR) de l'air de refroidissement. Ces gorges présentent une section semi-circulaire et comprennent des portions droites (8) et des portions de transition (9) en forme d'arc reliant ces dernières sans interruption. Les portions de gorges peuvent également faire partie de zones à ailettes en zigzag. Elles s'étendent alors obliquement par rapport à la longueur des ailettes.

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