Fin tube assembly for air-cooled condensing system and method of making same
OwnerH. Peter Fayinventor
Life of this patent
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Abstract
A fin tube assembly has a core tube of elongated transverse cross-section having rounded leading and trailing sides, opposite flat faces, and opposite open ends for flow through the tube. A plurality of fins project in opposite directions from finned areas of the opposite flat faces. The finned areas terminate short of the rounded sides of the core tube. A first internal rib extends across the interior of the core tube adjacent one rounded side and a second internal rib extends across the interior of the core tube adjacent the opposite rounded side to separate the interior of the core tube into a larger central channel between the ribs and separate side channels between each rib and the adjacent rounded side of the core tube.
Claims34
A fin tube assembly for an air-cooled condenser, comprising:
- a core tube of elongated transverse cross-section having rounded leading and trailing sides, opposite flat faces, and open ends;
- a plurality of spaced, parallel fins projecting from a finned area of each flat face, the finned area extending across at least the majority of the width of the flat face and terminating short of the rounded sides;
- a first internal rib extending across the interior of the core tube adjacent one rounded side and a second internal rib extending across the interior of the core tube adjacent the opposite rounded side to separate the interior of the core tube into a larger central channel between the ribs and separate side channels between each rib and the adjacent rounded side of the core tube;
- and
- each rib being located outside the finned area of the core tube.
A fin tube assembly for an air-cooled condensing system, comprising:
- a plurality of core tubes extending parallel to one another at spaced intervals, each core tube having opposite open ends and being of elongate transverse cross section with opposite flat faces and rounded leading and trailing sides, the leading edge facing in the direction of a cooling air flow across the fin tube assembly and the trailing edge facing away from the cooling air flow, each flat face having a fin area extending over at least substantially the entire area of said flat face, the fin area terminating short of the rounded leading and trailing sides of the core tube;
- a plurality of spaced, parallel fins projecting outwardly from each of the fin areas of each core tube;
- a first internal rib extending across the interior of each core tube at a location outside the fin area so as to form a separate first side chamber between the first internal rib and the adjacent rounded side of the core tube;
- a second internal rib extending across the interior of each core tube at a location outside the fin area so as to form a separate second side chamber between the second internal rib and the adjacent rounded side of the core tube;
- and
- the space between the first and second ribs of each core tube comprising a main condensing chamber.
A method of making a fin tube assembly for an air-cooled condenser, comprising the steps of:
- taking first and second rectangular panels of sheet metal having opposite side edges and first and second opposite end edges:
- bending a first strip portion extending alongside a first side edge of each panel approximately perpendicular to the panel to form a perpendicular bent first side portion;
- bending a second strip portion extending alongside a second side edge of each panel to form a second side portion having a curved, 180 degree bend with a free end facing towards the first end of the panel;
- positioning the two panels parallel to one another with the bent first side portion of first panel facing the bent second side portion of the second panel and the bent first side portion of the second panel facing the bent second side portion of the first panel, the second panel being offset downwardly relative to the first panel so that the bent first side portion of the second panel is adjacent the free second side edge of the first panel and the bent first side portion of the first panel is adjacent the second side edge of the second panel;
- moving the two panels towards one another until the bent first side portion of the first panel engages an inner wall of the second panel and the bent first side portion of the second panel engages an inner wall of the first panel, forming an elongate central channel between the bent first side portions of the panels and side channels between each bent first portion of a panel and the respective curved 180 degree bend at the second side of the other panel;
- and
- attaching the second side edge of each panel to an opposing outer portion of the other panel, whereby the perpendicular first side portions of the two panels form integral ribs inside the resultant core tube separating the core tube into a central channel and a side channel on each side of the central channel.
Dependencies are inferred from the claim text.