Browse Prior Art Database

Crossflow Heat Exchanger

IP.com Disclosure Number: IPCOM000074112D
Original Publication Date: 1971-Mar-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Berger, CM: AUTHOR [+4]

Abstract

An air-to-air heat exchanger assembly 2 is formed of alternately stacked corrugated metal sheets 3, each spaced from the adjoining like sheet by a planar metal separator sheet 4. Corrugated sheets 3 present corrugations 5 which are periodically redirected to form nonstraight air passages that generate turbulence, thereby affording boundary layer breakup for improved heat exchange efficiency.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Crossflow Heat Exchanger

An air-to-air heat exchanger assembly 2 is formed of alternately stacked corrugated metal sheets 3, each spaced from the adjoining like sheet by a planar metal separator sheet 4. Corrugated sheets 3 present corrugations 5 which are periodically redirected to form nonstraight air passages that generate turbulence, thereby affording boundary layer breakup for improved heat exchange efficiency.

Separator sheets 4 are notched at each stack corner to form projecting flanges 7, 8. Flanges 7, adjoining the transverse sides in the direction of air flow of the underlying corrugated sheet 3, are deformed downwardly and the margin sealed against the next adjoining flange 8 to form a wedge shaped approach at the leading and trailing edges of the flow path. At each assembly corner a seal 9 is continuously bonded to the adjoining edges of separator flanges 7 and 8 to isolate the flow paths.

The corrugated sheets 3, as seen at B in section, are generated by superplastic thermoforming to provide flat surfaces 10 for extended contact and improved heat transfer with the contacting separator sheets 4 and are progressively thinned at the midpoint 11 to also improve heat transfer. Assembly of the heat exchanger is effected by applying a tin coating to the elements, clamping the parts in a jig and reflowing the tin in a hot oil bath.

1

Page 2 of 2

2

[This page contains 2 pictures or other non-text objects]