Arrowhead fin for heat exchange tubing

Patent metadata

Field	Value
Publication number	US-11719494-B2
Application number	US-202017086827-A
Country	US
Kind code	B2
Filing date	Nov 2, 2020
Priority date	Feb 4, 2016
Publication date	Aug 8, 2023
Grant date	Aug 8, 2023

Abstract

A new heat exchange tube fin design in which a plurality of arrowhead shapes are pressed into or embossed onto each fin, the arrowhead shape defined by two intersecting wedge sections. The pressed arrowhead shapes are grouped into nested pairs, and one of the arrowheads in a pair is pressed as a positive relative to the fin plane and the other of the pair is pressed as a negative relative to the fin plane. The arrowhead pairs are placed in rows parallel to the air flow direction and arrowhead pairs in one row are preferably staggered relative to the arrowhead pairs in the adjacent row along the fin in the air flow direction.

First claim

The invention claimed is:

1. A fin for a heat exchange tube comprising a plurality of fin segments each fin segment comprising arrowhead shapes arranged along a length of said fin segment, said length parallel to an air flow direction along said fin segment; wherein said arrowhead shapes are arranged into arrowhead pairs, each arrowhead pair comprising an indented arrowhead shape and a raised arrowhead shape, where a pointed end of one arrowhead shape of a pair shares a point on the fin segment with a forked end of a second arrowhead shape of the pair, and wherein said pairs of arrowhead shapes are spaced apart along said length, the pointed end of each arrowhead pair separated from the forked end of an adjacent arrowhead pair by a portion of said fin segment that is flat.

2. The fin according to claim 1 , wherein said arrowhead pairs each comprise two intersecting arrowhead shapes, a first arrowhead shape comprising said indented arrowhead shape and a second arrowhead shape comprising said raised arrowhead shape.

3. The fin according to claim 1 , wherein said arrowhead shapes are arranged in two or more rows on each fin segment, said rows aligned with and parallel to said length of said fin segment.

4. The fin according to claim 1 , wherein a first plurality of said arrowhead shapes are pressed in a first direction perpendicular to a plane of said fin segment, and a second plurality of said arrowhead shapes are pressed in a second direction perpendicular to said plane of said fin segment, said second direction opposite to said first direction.

5. The fin according to claim 1 , wherein a first arrowhead shape of an arrowhead pair is pressed in a first direction perpendicular to a plane of said fin segment, and a second arrowhead shape of said arrowhead pair is pressed in a second direction perpendicular to said plane of said fin segment, said second direction opposite to said first direction.

6. The fin according to claim 1 , wherein arrowhead pairs in a single row are spaced apart from one-another by a factor of 6 to 12 times the spacing between adjacent fin segments.

7. The fin according to claim 1 , wherein said arrowheads have a width that is 2 to 3 times the spacing between adjacent fin segments.

8. The fin according to claim 1 , wherein said arrowheads have a length that is 5 to 8 times the spacing between adjacent fin segments.

9. A heat exchange tube having a fin attached thereto, said fin comprising a plurality of fin segments, each said fin segment comprising arrowhead shapes arranged along a length of said fin segment, said length parallel to an air flow direction along said fin segment; wherein said arrowhead shapes are arranged into arrowhead pairs, each arrowhead pair comprising an indented arrowhead shape and a raised arrowhead shape, where a pointed end of one arrowhead shape of a pair shares a point on the fin segment with a forked end of a second arrowhead shape of the pair, and wherein said pairs of arrowhead shapes are spaced apart along said length, the pointed end of each arrowhead pair separated from the forked end of an adjacent arrowhead pair by a portion of said fin segment that is flat.

10. The heat exchange tube according to claim 9 , wherein said arrowhead pairs each comprise two intersecting arrowhead shapes, a first arrowhead shape comprising said indented arrowhead shape and a second arrowhead shape comprising said raised arrowhead shape.

11. The heat exchange tube according to claim 9 , wherein said arrowhead shapes are arranged in two or more rows on each fin segment, said rows aligned with and parallel to said length of said fin segment.

12. The heat exchange tube according to claim 9 , wherein a first plurality of said arrowhead shapes are pressed in a first direction perpendicular to a plane of said fin segment, and a second plurality of said arrowhead shapes are pressed in a second direction perpendicular to said plane of said fin segment, said second direction opposite to said first direction.

13. The heat exchange tube according to claim 9 , wherein a first arrowhead shape of an arrowhead pair is pressed in a first direction perpendicular to a plane of said fin segment, and a second arrowhead shape of said arrowhead pair is pressed in a second direction perpendicular to said plane of said fin segment, said second direction opposite to said first direction.

14. According to the heat exchange tube of claim 9 , wherein arrowhead pairs in a single row are spaced apart from one-another by a factor of 6 to 12 times the spacing between adjacent fin segments.

15. The heat exchange tube according to claim 9 , wherein said arrowheads have a width that is 2 to 3 times the spacing between adjacent fin segments.

16. The heat exchange tube according to claim 9 , wherein said arrowheads have a length that is 5 to 8 times the spacing between adjacent fin segments.

17. A field erected air cooled industrial steam condenser comprising a plurality of heat exchange tubes, said heat exchange tubes each having a fin attached to an external surface of a flat surface of said tube, said fin comprising a plurality of single fin segments extending between adjacent surfaces of a pair of heat exchange tubes, each said fin segment comprising arrowhead shapes arranged along a length of said fin segment, said length parallel to an air flow direction along said fin; wherein said arrowhead shapes are arranged into arrowhead pairs, each arrowhead pair comprising an indented arrowhead shape and a raised arrowhead shape, where a pointed end of one arrowhead shape of a pair shares a point on the fin segment with a forked end of a second arrowhead shape of the pair, and wherein said pairs of arrowhead shapes are spaced apart along a said length, the pointed end of each arrowhead pair separated from the forked end of an adjacent arrowhead pair by a portion of said fin segment that is flat.

18. The field erected air cooled industrial steam condenser according to claim 17 , wherein said arrowhead pairs each comprise two intersecting arrowhead shapes, a first arrowhead shape comprising said indented arrowhead shape and a second arrowhead shape comprising said raised arrowhead shape.

19. The field erected air cooled industrial steam condenser according to claim 17 , wherein said arrowhead shapes are arranged in two or more rows on each fin segment, said rows aligned with and parallel to said length of said fin segment.

20. The field erected air cooled industrial steam condenser according to claim 17 , wherein a first plurality of said arrowhead shapes are pressed in a first direction perpendicular to a plane of said fin segment, and a second plurality of said arrowhead shapes are pressed in a second direction perpendicular to said plane of said fin segment, said second direction opposite to said first direction.

21. The field erected air cooled industrial steam condenser according to claim 17 , wherein a first arrowhead shape of an arrowhead pair is pressed in a first direction perpendicular to a plane of said fin segment, and a second arrowhead shape of said arrowhead pair is pressed in a second direction perpendicular to said plane of said fin segment, said second direction opposite to said first direction.

22. The field erected air cooled industrial steam condenser according to claim 17 , wherein arrowhead pairs in a single row are spaced apart from one-another by a factor of 6 to 12 times the spacing between adjacent fin segments.

23. The field erected air cooled industrial steam conde

Assignees

• Evapco Inc

Inventors

• Bugler Thomas W
• Libert Jean-Pierre
• Huber Mark
• Reilly Aaron

Classifications

• F28F1/16 Primary

  the means being integral with the element, e.g. formed by extrusion (F28F1/22 takes precedence) · CPC title

• F28B1/06 Primary

  using air or other gas as the cooling medium · CPC title

• F28F1/04

  polygonal, e.g. rectangular {(F28F1/022 takes precedence)} · CPC title

• F28F1/126

  consisting of zig-zag shaped fins (F28F1/105 takes precedence) · CPC title

• F28F1/26

  the means being integral with the element (F28F1/32 takes precedence) · CPC title