Enhanced heat transfer surface

Patent metadata

Field	Value
Publication number	US-11454448-B2
Application number	US-201816767022-A
Country	US
Kind code	B2
Filing date	Nov 27, 2018
Priority date	Nov 27, 2017
Publication date	Sep 27, 2022
Grant date	Sep 27, 2022

Abstract

A heat transfer surface for use in conjunction with a heat exchanger is disclosed. The heat transfer surface a corrugated member where rows of corrugations that are offset relative to each other forming at least an alternating series of first and second rows or first, second and third rows. In some embodiments the heat transfer surface includes a heat transfer enhancement feature disposed within individual corrugations of the corrugated member to provide a more turbulent or tortuous fluid flow path through the heat transfer surface. In some example embodiments the heat transfer enhancement feature is a ridge disposed in the planar portions of at least some of the rows of corrugations. In other example embodiments the planar fin portions are porous fin surfaces. In other embodiments, the corrugated member cooperates with heat transfer enhancement features in the form of triangular protuberances disposed on their inner surfaces of spaced apart plates.

First claim

What is claimed is:

1. A heat transfer surface, comprising:
a plurality of transverse rows of corrugations disposed adjacent to one another and extending in an axial direction;
wherein each row includes:
a plurality of spaced apart upper and lower bridge portions; and
a plurality of fin surface portions extending between and interconnecting the spaced apart upper and lower bridge portions;
wherein the plurality of spaced apart upper and lower bridge portions and the plurality of fin surface portions are co-operatively configured such that an alternating series of upper and lower bridge portions interconnected by fin surface portions is formed;

the plurality of rows of corrugations includes a plurality of first rows of corrugations and a plurality of second rows of corrugations, wherein the plurality of first rows of corrugations and the plurality of second rows of corrugations are disposed in an alternating series such that one of the plurality of second rows of corrugations is disposed intermediate adjacent ones of the plurality of first rows of corrugations such that the plurality of rows of corrugations that define the heat transfer surface is comprised of a plurality of adjacent sets of first and second rows of corrugations, each set comprising one of the plurality of first rows of corrugations and one of the plurality of second rows of corrugations;
for each set of adjacent first and second rows of corrugations, the first row is offset relative to the adjacent second row such that there is an absence of alignment between a central axis that extends through the upper bridge portion of a corrugation of the first row with a central axis that extends through the upper bridge portion of an adjacent corrugation of the second row such that the central axis of the adjacent corrugation of the second row is displaced laterally, relative to the central axis of the upper bridge portion of the corrugation of the first row by a predetermined distance as measured along an axis that extends transverse to the axial direction of the heat transfer surface;
wherein at least one row of the first row and the second row of each set of adjacent first and second rows includes

a heat transfer enhancement feature disposed in the fin surface portions of each of the corrugations defined by the at least one row such that the heat transfer enhancement feature is disposed intermediate adjacent upper and lower bridge portions in the alternating series of upper and lower bridge portions of the at least one row.

2. The heat transfer surface as claimed in claim 1 , wherein the predetermined distance by which the central axis of the upper bridge portion of a corrugation in the second row is displaced relative to the the central axis of the upper bridge portion of the corrugation in the first row is 50% of a distance, as measured along the transverse axis, that is spanned by an individual corrugation.

3. The heat transfer surface as claimed in claim 1 , wherein the heat transfer enhancement feature comprises:
a ridge portion extending from the fin surface portion such that the fin surface portions are non-planar.

4. The heat transfer surface as claimed in claim 3 , wherein the ridge portion is disposed at an angle relative to the attached upper bridge portion.

5. The heat transfer surface as claimed in claim 3 , wherein only the plurality of second rows of corrugations includes the ridge portions.

6. The heat transfer surface as claimed in claim 3 , wherein the plurality of first rows of corrugations and the plurality of second rows of corrugations each include the ridge portions.

7. The heat transfer surface as claimed in claim 1 , wherein the heat transfer enhancement feature comprises:
a plurality of apertures defined in each of the first surface portions of each corrugation in the plurality of first rows of corrugations and the plurality of second rows of corrugations.

8. The heat transfer surface as claimed in claim 7 , wherein each row of corrugations in the plurality of rows of corrugations is configured such that the corrugations define a pitch, (P), between a minimum of 2.5 mm to a maximum of 8 mm; and
each row of corrugations in the plurality of rows of corrugations has a width, (W), as measured along an axis that extends parallel to the axial direction of the heat transfer surface of a minimum of 1.016 mm to a maximum of 20 mm; and
wherein the plurality of apertures are generally circular apertures each having a diameter of a minimum of 0.25 mm to a maximum of 2 mm.

9. The heat transfer surface as claimed in claim 1 , wherein the plurality of rows of corrugations further comprise a plurality of third rows of corrugations wherein the each third row is disposed in conjunction with the plurality of first rows and the plurality of second rows such that a repeating pattern of first, second and third rows that extends in the axial direction is defined, wherein each set of corrugations comprises a first row, an adjacent second row, and an adjacent third row;
wherein the first row, the second row and the third row are cooperatively configured such that the third row of corrugations is offset relative to both the first row and the second row such that a central axis extending through the upper bridge portion of a corrugation in the third row is laterally displaced relative to the central axis that extends through the upper bridge portion of the corrugation of the second row by a predetermined distance as measured along the axis that extends transverse to the axial direction of the heat transfer surface.

10. A heat transfer surface, comprising:
a plurality of transverse rows of corrugations disposed adjacent to one another and extending in an axial direction;
wherein each row of corrugations includes:
a plurality of spaced apart upper and lower bridge portions; and
a plurality of fin surface portions extending between and interconnecting the spaced apart upper and lower bridge portions;
wherein the plurality of spaced apart upper and lower bridge portions and the plurality of fin surface portions are co-operatively configured such that an alternating series of upper and lower bridge portions interconnected by fin surface portions is formed;

the plurality of rows of corrugations includes a plurality of sets of adjacent rows of corrugations, each set of adjacent rows corrugations comprising a first row, a second row and a third row;
wherein for each set of adjacent rows of corrugations, the first row is offset relative to the second row such that there is an absence of alignment between a central axis that extends through an upper bridge portion of a corrugation defined by the second row with a central axis that extends through an upper bridge portion of a corrugation defined by the adjacent first row such that the central axis that extends through the upper bridge portion of the corrugation defined by the second row is laterally displaced relative to the central axis that extends through the upper bridge portion of the corrugation defined by the first row, by a predetermined distance, as measured along an axis that extends transverse to the axial direction of the heat transfer surface, and the third row is offset relative to the second row such that there is an absence of alignment between a central axis that extend through an upper bridge portion of a corrugation defined by the third row with the central axis that extends through the upper bridge portion of the corrugation defined by the second row such that the central axis that extends through the upper bridge portion of the corrugation defined by the third row is laterally displaced laterally relative to the central axis of the corrugation defined by the second row along the axis

Assignees

• Dana Canada Corp

Inventors

• Fukada Takayuki
• Bardeleben Michael J R
• Kenney Benjamin A

Classifications

• F28D1/0341 Primary

  with U-flow or serpentine-flow inside the conduits · CPC title

• F28F3/027

  with openings, e.g. louvered corrugated fins; Assemblies of corrugated strips · CPC title