US4256178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coaxial heat exchanger and method for constructing a heat exchanger
Assignee: MAN AG
•
Filing: 1978-02-17
•
Granted: 1981-03-17
•
Expires: 1998-02-17
Abstract
Abstract A heat exchanger and process for constructing the heat exchanger with the heat exchanger including a plurality of tubes which are to be traversed by two fluid media to be heat exchanged with each other with each tube having a tube end for the entrance of the respective fluid medium and a tube end for the exit of the respective fluid medium. The tubes are juxtaposed so that at each end of the heat exchanger, the tube ends of the tubes to be traversed by one fluid medium project in an axial direction beyond the other tube ends of the remaining tubes located at this end of the heat exchanger. The tube ends of the tubes to be traversed by one of the fluid media which project beyond the other tube ends of the remaining tubes are combined into a bundle at each end of the heat exchanger. At least some of the components of the heat exchanger are shaped from a deformable starting material containing one of two starting compounds of a ceramic substance with the starting compound contained in the starting material being caused to react with the other starting compound so as to convert the starting material of the components into a ceramic substance.
Inventors
- 👤 Gunter Fauvel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:50
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/04; F28D; F28D7/00; F28D7/0008; F28D7/0016; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/442; Y10S165/449; Y10S165/905
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
131 words
A heat exchanger which includes a plurality of juxtaposed parallel tubes for the purpose of effecting a heat exchanger when the tubes are traversed by two fluid media between which the heat exchange is to be effected, each tube having a tube end for an entrance of a respective fluid medium and a tube end for an exit of a respective fluid medium, characterized in that at each end of the heat exchanger the tube ends of the tubes to be traversed by one of the fluid media project in an axial direction beyond the tube ends of the other remaining tubes at that end of the heat exchanger and are combined into a bundle in the manner of a bottleneck wherein the tube ends of the bundle contact one another.
Claim 2
Dependent Claim
131 words
A heat exchanger which includes a plurality of juxtaposed parallel tubes for the purpose of effecting a heat exchanger when the tubes are traversed by two fluid media between which the heat exchange is to be effected, each tube having a tube end for an entrance of a respective fluid medium and a tube end for an exit of a respective fluid medium, characterized in that at each end of the heat exchanger the tube ends of the tubes to be traversed by one of the fluid media project in an axial direction beyond the tube ends of the other remaining tubes at that end of the heat exchanger and are combined into a bundle in the manner of a bottleneck wherein the tube ends of the bundle contact one another.
Claim 3
Dependent Claim
24 words
A heat exchanger according to claim 1, characterized in that at least a portion of the heat exchanger is constructed of a ceramic material.
Claim 4
Dependent Claim
24 words
A heat exchanger according to claim 1, characterized in that at least a portion of the heat exchanger is constructed of a ceramic material.
Claim 5
Dependent Claim
152 words
A heat exchanger according to claim 1, characterized in that said plurality of juxtaposed tubes includes two sets of tubes with the tubes of one set to be traversed by a first fluid medium of said two fluid media and the tubes of the second set to be traversed by the second fluid medium of said two fluid media, and wherein the one ends of the tubes of said first set project beyond the one ends of the tubes of said second set at one end of said heat exchanger and the other ends of the tubes of the second set project beyond the other ends of the tubes of the first set at the other end of said heat exchanger, the projecting ends of the tubes of both sets being respectively combined into a bundle in the manner of a bottleneck wherein the tube ends of the bundle contact one another.
Claim 6
Dependent Claim
153 words
A heat exchanger according to claim 1, characterized in that said plurality of juxtaposed tubes includes two sets of tubes with the tubes of one set to be traversed by a first fluid medium of said two fluid media and the tubes of the second set to be traversed by the second fluid medium of said two fluid media, and wherein the one ends of the tubes of said first set project beyond the one ends of the tubes of said second set at one end of said heat exchanger and the other ends of the tubes of the first set project beyond the other ends of the tubes of the second set at the other end of said heat exchanger, the projecting ends of the tubes of the first set being respectively combined into a bundle in the manner of a bottleneck wherein the tube ends of the bundle contact one another.
Claim 7
Dependent Claim
137 words
A heat exchanger according to claim 1, characterized in that a first connecting pipe is provided at each end of the heat exchanger, the tube ends combined into a bundle at each end of the heat exchanger respectively extend into the first connecting pipe, and in that the tube ends of the remaining tubes located at each end of the heat exchanger adjoin, in each case, an annular gap formed by the respective first connecting pipe and a second connecting pipe of a larger diameter, the second connecting pipe is fixed in position with respect to the first connecting pipe by a spacer element, the spacer element extends coaxially with respect to the first connecting pipes and is constructed so as to be one of separate or integral with one of the first or second connecting pipes.
Claim 8
Dependent Claim
24 words
A heat exchanger according to claim 6, characterized in that at least a portion of the heat exchanger is constructed of a ceramic material.
Claim 9
Dependent Claim
44 words
A heat exchanger according to claim 6, characterized in that a tubular internal shell is inserted in the respective first connecting pipe with the tube ends combined into a bundle at each end of the heat exchanger being surrounded by the tubular internal shell.
Claim 10
Dependent Claim
37 words
A heat exchanger according to claim 8, characterized in that a tubular external shell extends between the two ends of the heat exchanger, and in that the second connecting pipes are surrounded by the tubular external shell.
Claim 11
Dependent Claim
24 words
A heat exchanger according to claim 9, characterized in that at least a portion of the heat exchanger is constructed of a ceramic material.
Claim 12
Dependent Claim
37 words
A heat exchanger according to claim 6, characterized in that a tubular external shell extends between the two ends of the heat exchanger, and in that the second connecting pipes are surrounded by the tubular external shell.
Claim 13
Dependent Claim
24 words
A heat exchanger according to claim 11, characterized in that at least a portion of the heat exchanger is constructed of a ceramic material.
Claim 14
Dependent Claim
141 words
A process for the production of a heat exchanger which includes a plurality of parallel tubes which are to be traversed by two fluid media to be heat exchanged with each other, each tube having a tube end for an entrance of a respective fluid medium and a tube end for an exit of a respective fluid medium, characterized by juxtaposing the tubes so that at each end of the heat exchanger the tube ends of the tubes to be traversed by one of the fluid media project in an axial direction beyond tube ends of the other remaining tubes located at that end of the heat exchanger, and at each end of the heat exchanger combining the projecting tube ends into a bundle in the manner of a bottleneck so that the tube ends of the bundle contact one another.
Claim 15
Dependent Claim
141 words
A process for the production of a heat exchanger which includes a plurality of parallel tubes which are to be traversed by two fluid media to be heat exchanged with each other, each tube having a tube end for an entrance of a respective fluid medium and a tube end for an exit of a respective fluid medium, characterized by juxtaposing the tubes so that at each end of the heat exchanger the tube ends of the tubes to be traversed by one of the fluid media project in an axial direction beyond tube ends of the other remaining tubes located at that end of the heat exchanger, and at each end of the heat exchanger combining the projecting tube ends into a bundle in the manner of a bottleneck so that the tube ends of the bundle contact one another.
Claim 16
Dependent Claim
176 words
A process according to claim 13, characterized in that said plurality of tubes includes two sets of tubes of which the tubes of one set are to be traversed by a first fluid medium of said two fluid media and the tubes of the second set are to be traversed by the second fluid medium of said two fluid media, and wherein said juxtaposing step includes arranging the tubes of said two sets in such a way that the one ends of the tubes of the first set project beyond the one ends of the tubes of the second set at one end of said heat exchanger and the other ends of the tubes of the second set project beyond the other ends of the tubes of the first set at the other end of said heat exchanger, and in said combining step the projecting ends of the tubes of both tube sets are respectively combined into a bundle in the manner of a bottleneck so that the tube ends of the bundle contact one another.
Claim 17
Dependent Claim
176 words
A process according to claim 13, characterized in that said plurality of tubes includes two sets of tubes of which the tubes of one set are to be traversed by a first fluid medium of said two fluid media and the tubes of the second set are to be traversed by the second fluid medium of said two fluid media, and wherein said juxtaposing step includes arranging the tubes of said two sets in such a way that the one ends of the tubes of the first set project beyond the one ends of the tubes of the second set at one end of said heat exchanger and the other ends of the tubes of the first set project beyond the other ends of the tubes of the second set at the other end of said heat exchanger, and in said combining step the projecting ends of the tubes of said first set are respectively combined into a bundle in the manner of a bottleneck so that the tube ends of the bundle contact one another.
Claim 18
Dependent Claim
21 words
A process according to claim 13, characterized in that the step of combining includes compressing the tubes by a radial pressure.
Claim 19
Dependent Claim
19 words
A process according to claim 16, further characterized by applying one tubular internal shell on each tube end bundle.
Claim 20
Dependent Claim
96 words
A process according to claim 17, further characterized by applying one first connecting pipe on each tubular internal shell, applying a second connecting pipe of a larger diameter to the other tube ends at the respective ends of the heat exchanger, fixing the second connecting pipe with respect to the first connecting pipe by a spacer element which is one of separate or integral with one of the first and second connecting pipes, and applying an external shell to the two second connecting pipes and to a tube zone disposed between the two second connecting pipes.
Claim 21
Dependent Claim
72 words
A process according to claim 18, further characterized by shaping at least some components of the heat exchanger from a moldable starting material containing one of two starting compounds of a ceramic substance, and causing a reaction of the starting compound contained in the starting material with the other starting compound so that the starting material of the at least some components of the heat exchanger is converted into a ceramic substance.
Claim 22
Dependent Claim
69 words
A process according to claim 19, further characterized by introducing the starting material into at least one annular gap formed by at least two coaxially guided flexible tubes consisting of a material containing the other starting compound of the ceramic substance, and volatizing the tubes forming the annular gap during a reaction of the two starting compounds such that there remains at least one tube of a ceramic material.
Claim 23
Dependent Claim
79 words
A process according to claim 19, further characterized by producing tubes and remaining components of the heat exchanger from carbon fibers, introducing one of a liquid or gaseous silicon or a liquid or gaseous silicon compound into the carbon fiber tubes and into the remaining components of the heat exchanger, and heating the thus prepared tubes and remaining components so that a carbon bound in the carbon fibers forms silicon carbide with one of the silicon and silicon compound.
Claim 24
Dependent Claim
42 words
A process according to claim 21, further characterized by subjecting the tubes to a heat treatment prior to bringing the carbon fibers of the tubes into contact with the one of the gaseous or liquid silicon or gaseous or liquid silicon compound.
Claim 25
Dependent Claim
46 words
A process according to claim 22, further characterized by introducing a filler material of at least one of the two starting compounds in the form of one of particles and cores into spaces between the tubes prior to the compressing of the tubes by radial pressure.
Claim 26
Dependent Claim
48 words
A process according to claim 23, characterized in that at least one of the steps of applying the internal shells, the external shell, and the first and second connecting pipes includes winding carbon fibers to form the internal shells, external shell or the first and second connecting pipes.
References Cited (Backward Citations)
US3414052A
Cited
US3396783A
Cited
US3627039A
Cited
US3419069A
Cited
US3435893A
Cited
US3854523A
Cited
US3926251A
Cited
US4049049A
Cited
DE2721321A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |