US6904961B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prime surface gas cooler for high temperature and method for manufacture
Assignee: Honeywell International Inc
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Filing: 2003-01-07
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Granted: 2005-06-14
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Expires: 2023-01-07
Abstract
Abstract A high temperature prime surface heat exchanger is created using adjacent pairs of plates having braze cladding on a first surface thereof that are formed to create fluid flow passages for coolant and fluid flow passages for hot gas when assembled into a core by stacking the plates. The coolant passages are adjacent the first or clad surface of each formed plate to avoid direct contact with the high temperature gas flowing in the hot gas passages. The adjacent plate pairs are joined by brazing of a contacting portion of the first surface on each plate to form sealed coolant passages the core.
Inventors
- 👤 Steven Ayres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:14
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/08; F28F21/089; F28D; F28D9/00; F28D9/0031; F28D9/0037; F28F21/081; F28F21/082; F28F21/085; F28F3/00; F28F3/02; F28F3/04; F28F2250/00; F28F2250/10; F28F2250/104
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
135 words
A high temperature prime surface heat exchanger comprising: a plurality of plates having braze cladding on a first surface thereof and substantially devoid of braze cladding on a second surface thereof, the plates formed to create a first plurality of fluid flow passages for coolant and a second plurality of fluid flow passages for hot gas, the first plurality of passages adjacent the first surface of each formed plate and the second plurality of fluid flow passages adjacent the second surface of each formed plate, adjacent pairs of said plurality of plates joined at least in part by brazing of contacting interior portions of the first surfaces of the adjacent plates to create a plurality of the plurality of fluid flow passages for coolant, and the adjacent pairs of plates constrained mechanically by a case.
Claim 2
Dependent Claim
135 words
A high temperature prime surface heat exchanger comprising: a plurality of plates having braze cladding on a first surface thereof and substantially devoid of braze cladding on a second surface thereof, the plates formed to create a first plurality of fluid flow passages for coolant and a second plurality of fluid flow passages for hot gas, the first plurality of passages adjacent the first surface of each formed plate and the second plurality of fluid flow passages adjacent the second surface of each formed plate, adjacent pairs of said plurality of plates joined at least in part by brazing of contacting interior portions of the first surfaces of the adjacent plates to create a plurality of the plurality of fluid flow passages for coolant, and the adjacent pairs of plates constrained mechanically by a case.
Claim 3
Dependent Claim
20 words
A high temperature prime surface heat exchanger as defined in claim 1 wherein the plurality of plates are stainless steel.
Claim 4
Dependent Claim
18 words
A high temperature prime surface heat exchanger as defined in claim 1 wherein the braze cladding is copper.
Claim 5
Dependent Claim
19 words
A high temperature prime surface heat exchanger as defined in claim 1 wherein the braze cladding is copper alloy.
Claim 6
Dependent Claim
53 words
A high temperature prime surface heat exchanger as defined in claim 1 wherein the first surface of an end corrugation on a first plate of each adjacent pair is placed in contact with the second surface of an end corrugation on a second plate of the adjacent pair to form an end seal.
Claim 7
Dependent Claim
55 words
A method for manufacturing a prime surface heat exchanger as defined in claim 5 wherein a step of assembling includes placing the first surface of an end corrugation on a first adjacent plate in contact with an unclad surface of an end corrugation on a second adjacent plate to form an end seal during brazing.
Claim 8
Dependent Claim
159 words
A high temperature prime surface heat exchanger comprising: a plurality of plates having braze cladding on a first surface thereof and substantially devoid of braze cladding on a second surface thereof, the plates formed to create a first plurality of fluid flow passages for coolant and a second plurality of fluid flow passages for hot gas, the first plurality of passages adjacent the first surface of each formed plate and the second plurality of fluid flow passages adjacent the second surface of each formed plate, adjacent pairs of said plurality of plates joined by brazing of contacting portions of the first surfaces of the adjacent plates, and the adjacent pairs of plates constrained mechanically by a case and wherein the first surface of an end corrugation on a first plate of each adjacent pair is placed in contact with the second surface of an end corrugation on a second plate of the adjacent pair to form an end seal.
Claim 9
Dependent Claim
159 words
A high temperature prime surface heat exchanger comprising: a plurality of plates having braze cladding on a first surface thereof and substantially devoid of braze cladding on a second surface thereof, the plates formed to create a first plurality of fluid flow passages for coolant and a second plurality of fluid flow passages for hot gas, the first plurality of passages adjacent the first surface of each formed plate and the second plurality of fluid flow passages adjacent the second surface of each formed plate, adjacent pairs of said plurality of plates joined by brazing of contacting portions of the first surfaces of the adjacent plates, and the adjacent pairs of plates constrained mechanically by a case and wherein the first surface of an end corrugation on a first plate of each adjacent pair is placed in contact with the second surface of an end corrugation on a second plate of the adjacent pair to form an end seal.
Claim 10
Independent Claim
138 words
A method for manufacturing a prime surface heat exchanger comprising the steps of: applying braze cladding to a first surface of a plate while retaining a second surface of the plate substantially devoid of braze cladding: forming at least two plates into a plurality of heat exchanger prime surface elements; assembling the prime surface elements into a heat exchanger core with contact between adjacent pairs of elements occurring on contacting portions of the first surface; brazing the contacting portions of the plurality of elements to form fluid flow passages for coolant flow adjacent the first surface; and wherein the step of assembling includes placing the first surface of an end corrugation on a first adjacent plate in contact with an unclad surface of an end corrugation on a second adjacent plate to form an end seal during brazing.
Claim 11
Independent Claim
138 words
A method for manufacturing a prime surface heat exchanger comprising the steps of: applying braze cladding to a first surface of a plate while retaining a second surface of the plate substantially devoid of braze cladding: forming at least two plates into a plurality of heat exchanger prime surface elements; assembling the prime surface elements into a heat exchanger core with contact between adjacent pairs of elements occurring on contacting portions of the first surface; brazing the contacting portions of the plurality of elements to form fluid flow passages for coolant flow adjacent the first surface; and wherein the step of assembling includes placing the first surface of an end corrugation on a first adjacent plate in contact with an unclad surface of an end corrugation on a second adjacent plate to form an end seal during brazing.
References Cited (Backward Citations)
US4688631A
Cited
JPS61165271A
Cited
US4727001A
Cited
US5343936A
Cited
US5314570A
Cited
US5107922A
Cited
US5494100A
Cited
JPH0715814A
Cited
US5462113A
Cited
US5555933A
Cited
JPH09171094A
Cited
US6182487B1
Cited
US6244333B1
Cited
JP2000135590A
Cited
US6446712B1
Cited
US20010015085A1
Cited
US6298910B1
Cited
US6192978B1
Cited
US20010047861A1
Cited
US20020069998A1
Cited
US6595271B2
Cited
US20020074105A1
Cited
US20020189255A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2008-06-13 | 2008-12-13 | 2009-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2012-06-13 | 2012-12-13 | 2013-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2016-06-13 | 2016-12-13 | 2017-06-14 | $7700.00 | Window Closed / Lapsed |