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3-D dimpled heat exchanger

a heat exchanger and dimple technology, applied in the direction of heat exchange apparatus, lighting and heating apparatus, tubular elements, etc., can solve the problems of limited reynolds number and conventional approaches to increasing efficiency

Inactive Publication Date: 2007-04-26
LENNOX MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention provides a heat exchanger apparatus with a frame, tube, and turbulating structure. The turbulating structure consists of elements located arcuately around the inner periphery of the tube at approximately 120° increments. The invention promotes turbulent fluid flow within the tube, resulting in improved heat transfer. The method of manufacturing and heating system are also provided. The technical effects of the invention include improved heat transfer, reduced pressure drop, and reduced fouling."

Problems solved by technology

As a result, conventional approaches to increasing efficiency and therefore increasing Reynolds number are limited by the geometry of the system.

Method used

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Examples

Experimental program
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Effect test

embodiment 500

[0029] Referring now to FIG. 5, illustrated is a side elevation view of a portion of a first alternative embodiment 500 of the heat exchanger tube of FIG. 1. The heat exchanger tube 500 comprises first, second and third sections 510, 520, 530, respectively. The first section 510 has a first trio of dimples 511a-511c; the second section 520 has a second trio of dimples 521a-521c; and the third section 530 has a third trio of dimples 531a-531c. In this embodiment, the second trio of dimples 521a-521c is clockwise rotationally offset from the first trio of dimples 511a-511c about a longitudinal axis 512 by an angle α1 (See FIG. 6B). The third trio of dimples 531a-531c is clockwise rotationally offset from the second trio of dimples 521a-521c about the longitudinal axis 512 by an angle α2 (See FIG. 6C). In a preferred embodiment, the angles α1 and α2 may be any number of degrees between about 5° and about 30°.

[0030] Referring now to FIGS. 6A-6C with continuing reference to FIG. 5, illus...

embodiment 700

[0031] Referring now to FIG. 7, illustrated is a side elevation view of a portion of a second alternative embodiment 700 of the heat exchanger tube of FIG. 1. The heat exchanger tube 700 comprises first, second and third sections 710, 720, 730, respectively. The first section 710 has a first trio of dimples 711a-711c; the second section 720 has a second trio of dimples 721a-721c; and the third section 730 has a third trio of dimples 731a-731c. In this embodiment, the second trio of dimples 721a-721c is counterclockwise rotationally offset from the first trio of dimples 711a-711c about a longitudinal axis 712 by an angle α3 (See FIG. 8B). The third trio of dimples 731a-731c is counterclockwise rotationally offset from the second trio of dimples 721a-721c about the longitudinal axis 712 by an angle α4 (See FIG. 8C). In a preferred embodiment, the angles α3 and α4 may be any number of degrees between about 5° and about 30°.

[0032] Referring now to FIGS. 8A-8C with continuing reference t...

embodiment 900

[0033] Referring now to FIG. 9, illustrated is a side elevation view of a portion of a third alternative embodiment 900 of the heat exchanger tube of FIG. 1. The heat exchanger tube 900 comprises first, second and third sections 910, 920, 930, respectively. The first section 910 has a first trio of dimples 911a-911c; the second section 920 has a second trio of dimples 921a-921c; and the third section 930 has a third trio of dimples 931a-931c. In this embodiment, the second trio of dimples 921a-921c is clockwise rotationally offset from the first trio of dimples 911a-911c about a longitudinal axis 912 by an angle α5 (See FIG. 10B). The third trio of dimples 931a-931c is counterclockwise rotationally offset from the second trio of dimples 921a-921c about the longitudinal axis 912 by an angle α6 (See FIG. 10C). In a preferred embodiment, the angles α5 and may be any number of degrees between about 5° and about 30°.

[0034] Referring now to FIGS. 10A-10C, illustrated are sectional views o...

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Abstract

A heat exchanger apparatus comprising a frame, a tube coupled to the frame, and turbulating structure disposed within the tube and extending into an inner hollow space thereof for promoting turbulent fluid flow within the tube. The turbulating structure comprises elements located arcuately around an inner periphery of the tube at approximately 120° increments. A method of manufacturing and a heating system is also provided.

Description

TECHNICAL FIELD OF THE INVENTION [0001] The present invention is directed, in general, to heat exchange apparatus and, more specifically, to a design for heat exchanger tubes. BACKGROUND OF THE INVENTION [0002] Heat exchange tubes are used to transfer heat between two media by using, for example, a so-called “tube-in-tube” design or a “shell-in-tube” design. In a “tube-in-tube” design the fluid product to be heated or cooled flows through a product tube or series of product tubes and the heating or cooling media flows through an outer media tube or series of media tubes usually in a countercurrent fashion with respect to the product flow. Thus, heat is transferred between the media flowing in the inner space between the walls of the media and product tubes and the fluid product flowing through the product tubes or tubes. In a “shell-in-tube” design the product tubes are disposed within a container referred to as a shell and within which the heating or cooling media flows over all of...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F28F1/00
CPCB21C37/158F28F1/42F28F1/426
Inventor BESTE, MARK G.WYNNICK, DAVID M.
Owner LENNOX MFG