Patent US4084546A successfully refreshed from Google Patents.
US4084546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Linde GmbH
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Filing: 1976-09-03
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Granted: 1978-04-18
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Expires: 1996-09-03
Abstract
Abstract A heat exchanger has at least two cylindrical shells defining annular chambers lying one within the other. One of the annular chambers receives a tube bundle consisting of straight tubes while the other annular chamber receives a tube bundle of coiled tubes. The heat exchanger is particularly suitable for the heating of feed water (traversing the tubes) with steam (traversing the annular chambers) in a power plant in which the heat exchanger is disposed directly beneath the turbine on the turbine mount.
Inventors
- 👤 Martin Schneeberger
- 👤 Dieter Wittmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:36
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/005; F22; F22D; F22D1/00; F22D1/32
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
149 words
A heat exchanger comprising: at least two cylindrical shells in nested relation defining an outer annular compartment and an inner annular compartment; means for passing at least one first heat exchange fluid through said compartments; a straight-tube bundle extending through one of said compartments; a coiled-tube bundle received within said inner compartment; and means for passing at least one second heat exchange fluid through said tube bundles, said tube bundles having flow cross sections connected in series with said second fluid passing through said coiled-tube bundle in a direction opposite the direction of flow of said second fluid through said straight-tube bundle, said annular compartments being sealed from one another, said means for passing at least one first fluid through said compartments including a respective inlet and outlet for each compartment, said inner compartment including means forming an inlet chamber extending substantially the full length of said inner compartment.
Claim 2
Dependent Claim
149 words
A heat exchanger comprising: at least two cylindrical shells in nested relation defining an outer annular compartment and an inner annular compartment; means for passing at least one first heat exchange fluid through said compartments; a straight-tube bundle extending through one of said compartments; a coiled-tube bundle received within said inner compartment; and means for passing at least one second heat exchange fluid through said tube bundles, said tube bundles having flow cross sections connected in series with said second fluid passing through said coiled-tube bundle in a direction opposite the direction of flow of said second fluid through said straight-tube bundle, said annular compartments being sealed from one another, said means for passing at least one first fluid through said compartments including a respective inlet and outlet for each compartment, said inner compartment including means forming an inlet chamber extending substantially the full length of said inner compartment.
Claim 3
Dependent Claim
24 words
The heat exchanger defined in claim 1, further comprising baffle plates at each of said inlets for distributing said first fluid in said compartments.
Claim 4
Dependent Claim
24 words
The heat exchanger defined in claim 2, further comprising means at one end of said shells forming a chamber communicating between said tube bundles.
Claim 5
Dependent Claim
55 words
The heat exchanger defined in claim 3, further comprising means at an opposite end of said shells defining a collecting chamber communicating with the tubes of said collecting chamber communicating with the tubes of said coiled-tube bundle and a distributing chamber coaxial with said collecting chamber and communicating with the tubes of said straight-tube bundle.
Claim 6
Dependent Claim
52 words
The heat exchanger defined in claim 4 wherein said means at said one end includes a domed cover, said heat exchanger further comrpising at least one tube sheet at said one end connected to the tubes of at least one of said bundles, said domed cover being affixed to said tube sheet.
Claim 7
Dependent Claim
53 words
The heat exchanger defined in claim 5 wherein said shells are coaxial and have horizontal axes, said inlets are provided along an upper portion of the heat exchanger, said outlets are provided at a lower portion thereof, and said heat exchanger further comprises means enabling relative axial expansion and contraction of said shells.
Claim 8
Dependent Claim
26 words
The heat exchanger defined in claim 6, further comprising a core tube extending through the innermost shell, said coiled-tube bundle being wound around said core tube.
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) | 1981-04-17 | 1981-10-17 | 1982-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-17 | 1985-10-17 | 1986-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-17 | 1989-10-17 | 1990-04-18 | $7700.00 | Window Closed / Lapsed |