Patent US5181901A successfully refreshed from Google Patents.
US3854528A
Expired / Lapsed
US
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Heat-exchanger module
Assignee: Stein Industrie SA
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Filing: 1973-02-06
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Granted: 1974-12-17
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Expires: 1993-02-06
Abstract
Abstract In a heat exchanger unit with a plurality of tubes for the circulation of a first fluid and a inner sleeve for the circulation of a second fluid a transverse partition-wall is disposed between the outer shell and the inner sleeve assuming said circulations. Said transverse partition-wall delimits two annular spaces which communicate respectively with external ducts for the admission and discharge of the fluids. The ducts are immediately adjacent to said transverse partition-wall in order to avoid differential expansion under both steady state and transient flow conditions between the outer shell and the tubes of the heat exchanger unit.
Inventors
- 👤 P Pouderoux
- 👤 G Salon
- 👤 J Andro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:55
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/16; F28D7/1607; F22; F22B; F22B1/00; F22B1/02; F22B1/06; F22B1/063; F28F; F28F9/00; F28D21/00; F28D2021/0019; F28D2021/0054; F28F2265/00; F28F2265/26; F28F2270/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
136 words
A heat-exchanger unit comprising a tube bundle, an inner sleeve surrounding said bundle, openings located at the ends of the inner sleeve for admission and discharge of a first fluid into and from said bundle, an outer shell for the heat-exchanger unit spaced from said inner sleeve, a jacket on said inner sleeve extending downwardly between said sleeve and said outer shell a transverse partition-wall between said jacket and said shell, two annular spaces consisting of an upper and lower space between said wall and said jacket and said shell, external ducts opening into said spaces for the admission and discharge of a second fluid, and said ducts opening immediately adjacent to said partition-wall whereby minimum differential expansion under both steady-state and transient flow conditions occurs between said outer shell and the tubes of said bundle.
Claim 2
Dependent Claim
136 words
A heat-exchanger unit comprising a tube bundle, an inner sleeve surrounding said bundle, openings located at the ends of the inner sleeve for admission and discharge of a first fluid into and from said bundle, an outer shell for the heat-exchanger unit spaced from said inner sleeve, a jacket on said inner sleeve extending downwardly between said sleeve and said outer shell a transverse partition-wall between said jacket and said shell, two annular spaces consisting of an upper and lower space between said wall and said jacket and said shell, external ducts opening into said spaces for the admission and discharge of a second fluid, and said ducts opening immediately adjacent to said partition-wall whereby minimum differential expansion under both steady-state and transient flow conditions occurs between said outer shell and the tubes of said bundle.
Claim 3
Dependent Claim
78 words
A heat-exchanger unit in accordance with claim 1, said transverse partition-wall including a supporting ring fixed on said jacket, two sets of radial fins disposed on each side of said partition-wall within said annular spaces preventing circulation of the second fluid in the vicinity of said partition-wall, whereby said external ducts for the admission and discharge of the second fluid are insulated hydraulically and thermally both with respect to each other and with respect to said tube bundle.
Claim 4
Dependent Claim
22 words
A heat-exchanger unit in accordance with claim 2, one of said sets of radial fins being rigidly fixed to said inner sleeve.
Claim 5
Dependent Claim
22 words
A heat-exchanger unit in accordance with claim 2, one of said sets of radial fins being rigidly fixed to said outer shell.
Claim 6
Dependent Claim
20 words
A heat-exchanger unit in accordance with claim 2, said supporting ring resting on an internal shoulder of said outer shell.
Claim 7
Dependent Claim
63 words
A group of interconnected units in accordance with claim 1, said group being a steam generator, the first unit providing heating and vaporization, the second unit providing superheating, the thirD unit providing resuperheating, the arrangement of said inlet and outlet ducts of each unit reducing the length of the piping for the second fluid and connecting the units for vaporization, superheating and resuperheating.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |