US20070227713A1 - Heat exchanger tube with a compressed return bend, a serpentine heat exchanger tube with compressed return bends and heat exchanger implementing the same - Google Patents
Heat exchanger tube with a compressed return bend, a serpentine heat exchanger tube with compressed return bends and heat exchanger implementing the same Download PDFInfo
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- US20070227713A1 US20070227713A1 US11/393,906 US39390606A US2007227713A1 US 20070227713 A1 US20070227713 A1 US 20070227713A1 US 39390606 A US39390606 A US 39390606A US 2007227713 A1 US2007227713 A1 US 2007227713A1
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- United States
- Prior art keywords
- cross
- straight tube
- return bend
- heat exchanger
- tube
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
- F28D1/0477—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/006—Tubular elements; Assemblies of tubular elements with variable shape, e.g. with modified tube ends, with different geometrical features
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
A heat exchanger tube includes a tube body forming a hollow passageway and having a U-shaped tube section defining a return bend, a pair of straight tube sections and a pair of transition sections. Respective ones of the straight tube sections are connected to the return section with respective ones of the transition sections disposed therebetween. The straight tube sections extend generally parallel to one another. Each straight tube section has a straight tube cross-sectional width and the return bend has a return bend cross-sectional width that is smaller than the straight tube cross-sectional width. Multiple heat exchanger tubes can be connected together to form a serpentine heat exchanger tube. Multiple serpentine heat exchanger tubes or multiple heat exchanger tubes can be assembled together to form a heat exchanger apparatus.
Description
- The present invention relates to heat exchanger tubes. More particularly, the present invention is directed to a heat exchanger tube with a compressed return bend, a serpentine heat exchanger tube with compressed return bends and a heat exchanger fabricated from heat exchanger tubes with compressed return bends.
- In the past, manufacturers in the heat exchanger industry have been known to densely pack heat exchanger tubes in heat exchangers in order to achieve greater heat exchange efficiency while simultaneously maintaining or reducing the size of the heat exchanger. For example, in
FIGS. 1-3B ,depressions 100 in a form of indentations, hollows, grooves, notches or dimples are formed in designated depression areas DA in thereturn bends 102 a of theheat exchanger tubes 102. This particular densely-packed heat exchanger tube arrangement is more specifically described in U.S. Pat. No. 6,820,685. - In
FIGS. 3A and 3B , fourheat exchanger tubes 102 constitute a portion of a heat exchanger. These fourheat exchanger tubes 102 are stacked in a staggered planar arrangement and theadjacent return bends 102 a overlap one another by an amount of overlap OL shown inFIG. 3B . As best shown inFIG. 3B and with reference toFIG. 2 , a cross-sectional circular part of onereturn bend 102 a nests in thedepression 100 of theadjacent return bend 102 a to achieve the overlapping effect. By virtue of this overlapping effect, a heat exchanger assembled withheat exchanger tubes 102 havingreturn bends 102 a withdepressions 100 formed thereinto can be considered a densely packed heat exchanger. - However, there are drawbacks for a densely packed heat exchanger that uses return bends with depressions formed therein. First, as shown in
FIG. 2 , the depression results in aprotuberance 104 that projects into the hollow passageway of theheat exchanger tube 102. Such protuberances, particularly in consideration of the numerous heat exchanger tubes that constitute a heat exchanger, can interfere with the heat exchanger fluid flowing therethrough. At a minimum, theprotuberance 104 partially obstructs the flow of the heat exchanger fluid through the return bend and, at the apex of theprotuberance 104, the cross-sectional area CSA of the hollow passage way is significantly reduced as shown inFIG. 2 . Precision is required to accurately form the depressions repeatedly at the same depression area to numerous heat exchanger tubes. Also, precision in assembly is required in order to properly arrange the heat exchanger tubes so that the cross-sectional circular parts of the return bend nests within the depressions. Without the cross-sectional circular parts nesting properly within the depressions, a densely packed heat exchanger becomes larger in size than originally planned. - It would be beneficial to provide heat exchanger tubes with return bends that do not include depressions yet can be assembled to form a densely packed heat exchanger. It would also be beneficial to provide heat exchanger tubes with return bends that do not include depressions yet can be assembled to form a densely packed heat exchanger without consideration of precision assembly. The present invention provides these benefits.
- It is an object of the invention to provide a heat exchanger tube with a return bend that does not include any depressions and can be assembled with similar heat exchanger tubes to form a densely packed heat exchanger.
- It is another object of the invention to provide heat exchanger tubes with return bends that do not include any depressions and can be assembled together to form a densely packed heat exchanger without any consideration to precisely arranging the heat exchanger tubes relative to one another.
- It is yet another object of the invention to provide a densely packed heat exchanger using heat exchanger tubes that, upon assembly into the densely packed heat exchanger, do not overlap one another.
- A still further object of the invention is to provide a heat exchanger tube with a return bend that can be assembled into a densely packed heat exchanger without significantly reducing the cross-sectional area of the hollow passageway of the return bend.
- Accordingly, a heat exchanger tube of the first embodiment of the present invention, a serpentine heat exchanger tube of the second embodiment of the present invention and a heat exchanger apparatus of the third embodiment of the present invention are hereinafter described.
- The heat exchanger tube of one exemplary embodiment of the present invention includes a tube body forming a hollow passageway and having a U-shaped tube section defining a return bend, a pair of straight tube sections and a pair of transition sections. Respective ones of the straight tube sections are connected to the return section with respective ones of the transition sections disposed therebetween. The straight tube sections extend generally parallel to one another. Each straight tube section has a straight tube cross-sectional width and the return bend has a return bend cross-sectional width that is smaller than the straight tube cross-sectional width.
- The serpentine heat exchanger tube of another exemplary embodiment of the present invention includes a serpentine tube body disposed in plane, forming a hollow passageway and having a plurality of straight tube sections arranged generally parallel with one another, a plurality of return bends and a plurality of transition sections. A respective one of the plurality of transition sections interconnects respective ones of the plurality of straight tube sections and the return bends to form a serpentine configuration. Each straight tube section has a generally uniform straight tube section cross-sectional configuration and a straight tube cross-sectional width and each return bend has a generally uniform return bend cross-sectional configuration and a return bend cross-sectional width that is smaller than the straight tube cross-sectional width.
- The heat exchanger apparatus of yet another exemplary embodiment of the present invention includes an inlet header, an inlet connection connected to the inlet header, an outlet header, an outlet connection connected to the outlet header and a plurality of serpentine tube bodies. Each serpentine tube body is disposed in a respective plane, forms a hollow passageway and has a plurality of straight tube sections arranged generally parallel with one another, a plurality of return bends and a plurality of transition sections. A respective one of the plurality of transition sections interconnects respective ones the plurality of straight tube sections and the return bends to form a serpentine configuration. Each straight tube section has a generally uniform straight tube section cross-sectional configuration and a straight tube cross-sectional width. Each return bend has a generally uniform return bend cross-sectional configuration and a return bend cross-sectional width that is smaller than the straight tube cross-sectional width.
- These objects and other advantages of the present invention will be better appreciated in view of the detailed description of the exemplary embodiments of the present invention with reference to the accompanying drawings, in which:
-
FIG. 1 is a perspective view of a conventional heat exchanger tube that has depressions formed into its return bend. -
FIG. 2 is a cross-sectional view along one depression of the conventional heat exchanger tube inFIG. 1 . -
FIG. 3A is a partial perspective view of a conventional heat exchanger apparatus. -
FIG. 3B is a cross-sectional view of the conventional heat exchanger apparatus taken alonglines 3B-3B-3B inFIG. 3A . -
FIG. 4 is a perspective view of a heat exchanger tube of a first exemplary embodiment of the present invention. -
FIG. 5 is a side elevational view of the heat exchanger tube inFIG. 4 . -
FIG. 6 is a top planar view of the heat exchanger tube inFIG. 4 . -
FIG. 7 is a front elevational view of the heat exchanger tube inFIG. 4 . -
FIG. 8 is a cross sectional view of the heat exchanger tube taken along line that 8-8 inFIG. 5 . -
FIG. 9 is a cross sectional view of the heat exchanger tube taken along line that 9-9 inFIG. 5 . -
FIG. 10 is a perspective view of a conventional heat exchanger tube having a continuous circular cross-section. -
FIG. 11 is a cross sectional view of the conventional heat exchanger tube taken along line 11-11 inFIG. 10 . -
FIG. 12 is a cross sectional view of the conventional heat exchanger tube taken along line 12-12 inFIG. 10 . -
FIG. 13 is a perspective view of the conventional heat exchanger tube inFIG. 10 disposed between a pair of pressing members. -
FIG. 14 is a front elevational view of the conventional heat exchanger tube and pressing members shown inFIG. 13 with forces F1 and F2 being applied to the pressing members. -
FIG. 15 is a top planar view of the conventional heat exchanger tube and pressing members shown inFIG. 13 with forces F1 and F2 being applied to the pressing members. -
FIG. 16 is a top planar view of the heat exchanger tube of the first embodiment of the present invention as shown inFIG. 4 after its return bend has been compressed by the forces F1 and F2. -
FIG. 17 is an alternative cross sectional configuration in a form of an oval with a pair of opposing flat side walls of either the return bend or the straight tube sections of the heat exchanger tube of the first embodiment of the present invention. -
FIG. 18 is an alternative cross sectional configuration in a form of an oval of either the return bend or the straight tube sections of the heat exchanger tube of the first embodiment of the present invention. -
FIG. 19 is an alternative cross sectional configuration in a form of an ellipse of either the return bend or the straight tube sections of the heat exchanger tube of the first embodiment of the present invention. -
FIG. 20 is a perspective view of a serpentine tube of a second embodiment of the present invention. -
FIG. 21 is a perspective view of a heat exchanger apparatus of a third embodiment of the present invention. -
FIG. 22 is a partial perspective view of the heat exchanger apparatus inFIG. 21 . -
FIG. 23 is a cross-sectional view of the heat exchanger apparatus taken along lines 23-23 inFIG. 22 . -
FIG. 24 is a cross-sectional view of the heat exchanger apparatus taken along lines 24-24 inFIG. 22 perspective view of a heat exchanger tube of a first exemplary embodiment of the present invention. -
FIG. 25 is a side elevational view of two crossing, staggered, juxtaposed return bends of the heat exchanger tube inFIG. 21 contacting one another at location X. - Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. The structural components common to those of the prior art and the structural components common to respective embodiments of the present invention will be represented by the same symbols and repeated description thereof will be omitted.
- A first exemplary embodiment of a
heat exchanger tube 10 of the present invention is hereinafter described with reference toFIGS. 4-9 . As best shown inFIGS. 4-7 , theheat exchanger tube 10, hereinafter referred to astube 10, of the present invention includes atube body 12. One of ordinary skill in the art would appreciate that thetube 10 might be used in other applications other than in heat exchanger apparatuses. Thetube body 12 forms ahollow passageway 14 and has a U-shaped tube section defining areturn bend 16, a pair ofstraight tube sections 18 and a pair oftransition sections 20. Respective ones of thestraight tube sections 18 are connected to thereturn bend 16 section with respective ones of thetransition sections 20 disposed therebetween. Thestraight tube sections 18 extend generally parallel to one another at shown inFIG. 5 . The term “generally parallel” means that the opposingstraight tube sections return bend 16, might perfectly parallel one another, might taper slightly towards each other or might diverge slightly away from each other as is commonly known in the heat exchanger industry. - As shown in
FIG. 8 , eachstraight tube section 18 has a straight tube cross-sectional width Wsts and, at shown inFIG. 9 , thereturn bend 16 has a return bend cross-sectional width Wrb. The return bend cross-sectional width Wrb is smaller than the straight tube cross-sectional width Wsts. Preferably, a width ratio of the straight tube cross-sectional width Wsts to the return bend cross-sectional width Wrb is in a range of approximately 1.2 and 1.3. However, it is theorized by the inventors that the width ratio of the straight tube cross-sectional width Wsts to the return bend cross-sectional width Wrb might be in a range of approximately 1.1 and 1.6. With reference toFIG. 8 , each straight tube section has a straight tube cross-sectional height Hsts and, with reference toFIG. 9 , the return bend has a return bend cross-sectional height Hrb. The return bend cross-sectional height Hrb, as reflected inFIG. 9 , is larger than the straight tube cross-sectional height Hsts. However, one of ordinary skill in the art would appreciate that there are conventional tube bending techniques capable of controlling the return bend cross-sectional height Hrb. Therefore, it is possible that the return bend cross-sectional height Hrb might be equal to or even smaller than the straight tube cross-sectional height Hsts. - As shown in
FIGS. 4-8 , thestraight tube sections FIGS. 4, 7 and 8, the straight tube section cross-sectional configuration is circularly-shaped. As shown inFIGS. 4-7 and 9, thereturn bend 16 is a generally uniform in its return bend cross-sectional configuration at least substantially along its entirety and is absent of any depressions. For this embodiment, the return bend cross-sectional configuration is generally elliptically-shaped as best shown inFIG. 9 . Note that thereturn bend 16 includes opposingparallel sidewalls 22. - In
FIG. 7 , eachstraight tube section 18 has a straight tube cross-sectional area CAsts. The straight tube cross-sectional area CAsts of thestraight tube sections FIG. 9 , thereturn bend 16 has a return bend cross-sectional area CArb. With reference toFIGS. 8 and 9 , the return bend cross-sectional area CArb and the straight tube cross-sectional area CAsts are at least substantially equal to each other. By way of example only and not by way of limitation, it was empirically determined that the return bend cross-sectional area CArb was approximately 3½% smaller that the straight tube cross-sectional area CAst when using a one-inch tube having a 1.05-inch outer diameter that was formed into a generally elliptically-shaped cross-sectional return bend having a 1¼-inch height and a 0.85-inch width. - By way of example only and not by way of limitation, a method for fabricating the
tube 10 of the present invention is described with reference toFIGS. 10-16 . Atube 10 a inFIG. 10 has a constant circular cross-sectional configuration both along thestraight tube sections return bend 16 a as shown inFIGS. 11 and 12 . InFIGS. 13-15 ,return bend 16 a of thetube 10 a is placed between a pair of pressingmembers 24. Forces F1 and F2 of approximately equal magnitude are applied to respective ones on thepressing members 24. The magnitude of the forces F1 and F2 are sufficient to compress thereturn bend 16 a to form thetube 10 of the present invention described above. Since a circular tube is merely compressed at its return bend, a skilled artisans would appreciate that the return bend cross-sectional area CArb and the straight tube cross-sectional areas CAsts are at least substantially equal to each other. Also, it would be appreciated that since a single bent tube is compressed at thereturn bend 16, then the straight tube cross-sectional areas CAsts are at least substantially equal to each other. - Compressing the
return bend 16 a to form thetube 10 of the present invention forms thetransition sections 20. As best shown inFIGS. 5 and 6 , each transition section includes an opposing pair offirst walls 26 tapering inwardly from thestraight tube section 18 towards the return bend 16 (FIG. 6 ) and an opposing pair ofsecond walls 28 tapering inwardly from thereturn bend 16 towards thestraight tube section 18. Individual ones of the opposing pairs of first andsecond walls FIGS. 5-7 . - A skilled artisan would comprehend that the
tube 10 of the present invention might have other cross-sectional configurations of the straight tube sections and the return bend. By way of example only and not by way of limitation, the return bend cross-sectional configuration and/or the straight tube sections cross-sectional configurations can be generally oval-shaped as shownFIG. 17 with opposingparallel sidewalls 22 a, oval-shaped as shown inFIG. 18 or elliptically-shaped as shown inFIG. 19 although other cross-sectional configurations might be used. - A
serpentine tube 210 of a second exemplary embodiment of the present invention is illustrated inFIG. 20 . Theserpentine tube 210 includes aserpentine tube body 212 disposed in plane P and forms thehollow passageway 14. Theserpentine tube body 212 has a plurality ofstraight tube sections 18 arranged generally parallel with one another, a plurality of return bends 16 in a compressed form and a plurality oftransition sections 20. A respective one of the plurality oftransition sections 20 interconnects respective ones of the plurality ofstraight tube sections 18 and the return bends 16 to form a serpentine configuration inFIG. 20 . Eachstraight tube section 18 has a generally uniform straight tube section cross-sectional configuration and a straight tube cross-sectional width as discussed above. Eachreturn bend 16 has a generally uniform return bend cross-sectional configuration and a return bend cross-sectional width as discussed above. The return bend cross-sectional width is smaller than the straight tube cross-sectional width as discussed above. Also, as discussed above, eachstraight tube section 18 has a straight tube cross-sectional height and eachreturn bend 16 has a return bend cross-sectional height that is larger than the straight tube cross-sectional height. - A
heat exchanger apparatus 310 of a third exemplary embodiment of the present invention is illustrated inFIGS. 21-25 . InFIG. 21 , theheat exchanger apparatus 310 includes aninlet header 312, aninlet connection 314 connected to theinlet header 312, anoutlet header 316, anoutlet connection 318 connected to theoutlet header 316 and a plurality of adjacentserpentine tube bodies 212, the details of which being discussed above. Respective ones of the plurality of adjacentserpentine tube bodies 212 are connected to and between and in fluid communication with theinlet header 312 and theoutlet header 316. As best shown inFIGS. 21-25 , the plurality of adjacentserpentine tube bodies 212 are staggered in an alternating fashion with eachserpentine tube body 212 being disposed in a selected one of a plurality of parallel planes P1 through Pn (FIG. 21 ) in a juxtaposed manner. Staggered juxtaposed ones of the return bends 16 as illustrated inFIGS. 23 and 25 contact one another at a location X inFIG. 25 where the staggered juxtaposed ones of the return bends 16 cross one another. - According to the present invention, the heat exchanger tube includes a compressed return bend without any depressions. A plurality of such heat exchanger tubes can be assembled to form a densely packed heat exchanger without consideration to precisely arranging the heat exchanger tubes relative to one another. Without depressions, the compressed return bends do not overlap one another as in the prior art. Further, a heat exchanger tube with a compressed return bend and without depressions does not substantially reduce the cross-sectional area of the hollow passageway of the return bend as does those heat exchanger tubes with depressions.
- The present invention, may, however, be embodied in various different forms and should not be construed as limited to the exemplary embodiments set forth herein; rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete and will fully convey the scope of the present invention to those skilled in the art.
Claims (15)
1. A tube, comprising:
a tube body forming a hollow passageway and having a U-shaped tube section defining a return bend, a pair of straight tube sections and a pair of transition sections, respective ones of the straight tube sections connected to the return bend with respective ones of the transition sections disposed therebetween, the straight tube sections extending generally parallel to one another, each straight tube section having a straight tube cross-sectional width, the return bend having a return bend cross-sectional width being smaller than the straight tube cross-sectional width.
2. A tube according to claim 1 , wherein a width ratio of the straight tube cross-sectional width to the return bend cross-sectional width is in a range of approximately 1.2 and 1.3.
3. A tube according to claim 1 , wherein a width ratio of the straight tube cross-sectional width to the return bend cross-sectional width is in a range of approximately 1.1 and 1.6.
4. A tube according to claim 1 , wherein the straight tube sections have a generally uniform straight tube section cross-sectional configuration.
5. A tube according to claim 4 , wherein the straight tube section cross-sectional configuration is circularly-shaped or elliptically-shaped.
6. A tube according to claim 1 , wherein at least a substantial entirety of the return bend has a generally uniform return bend cross-sectional configuration.
7. A tube according to claim 6 , wherein the return bend cross-sectional configuration is generally one of oval-shaped with opposing parallel sidewalls, oval-shaped, elliptically-shaped and elliptically-shaped with opposing parallel sidewalls.
8. A tube according to claim 1 , wherein each transition section includes an opposing pair of first walls tapering inwardly from the straight tube section towards the return bend and an opposing pair of second walls tapering inwardly from the return bend towards the straight tube section, individual ones of the opposing pairs of first and second walls integrally connected in an alternating manner.
9. A tube according to claim 1 , wherein the return bend has a return bend cross-sectional area and each straight tube section has a straight tube cross-sectional area being at least substantially equal to relative to each other and at least substantially equal to the return bend cross-sectional area.
10. A serpentine tube, comprising:
a serpentine tube body disposed in plane, forming a hollow passageway and having a plurality of straight tube sections arranged generally parallel with one another, a plurality of return bends and a plurality of transition sections, a respective one of the plurality of transition sections interconnecting respective ones of the plurality of straight tube sections and the return bends to form a serpentine configuration, each straight tube section having a generally uniform straight tube section cross-sectional configuration and a straight tube cross-sectional width, each return bend having a generally uniform return bend cross-sectional configuration and a return bend cross-sectional width being smaller than the straight tube cross-sectional width.
11. A serpentine tube according to claim 10 , wherein a width ratio of the straight tube cross-sectional width to the return bend cross-sectional width is in a range of approximately 1.2 and 1.3.
12. A serpentine tube according to claim 10 , wherein a width ratio of the straight tube cross-sectional width to the return bend cross-sectional width is in a range of approximately 1.1 and 1.6.
13. A heat exchanger apparatus, comprising:
an inlet header;
an inlet connection connected to the inlet header;
an outlet header;
an outlet connection connected to the outlet header; and
a plurality of adjacent serpentine tube bodies staggered in an alternating fashion, respective ones of the plurality of adjacent serpentine tube bodies connected to and between and in fluid communication with the inlet header and the outlet header, each serpentine tube body disposed in a selected one of a plurality of parallel planes in a juxtaposed manner, forming a hollow passageway and having a plurality of straight tube sections arranged generally parallel with one another, a plurality of return bends and a plurality of transition sections, a respective one of the plurality of transition sections interconnecting respective ones the plurality of straight tube sections and the return bends to form a serpentine configuration, each straight tube section having a generally uniform straight tube section cross-sectional configuration and a straight tube cross-sectional width, each return bend having a generally uniform return bend cross-sectional configuration and a return bend cross-sectional width being smaller than the straight tube cross-sectional width, staggered juxtaposed ones of the return bends contacting one another at a location where the staggered juxtaposed ones of the return bends cross one another.
14. A heat exchanger according to claim 13 , wherein a width ratio of the straight tube cross-sectional width to the return bend cross-sectional width is in a range of approximately 1.2 and 1.3.
15. A heat exchanger according to claim 13 , wherein a width ratio of the straight tube cross-sectional width to the return bend cross-sectional width is in a range of approximately 1.1 and 1.6.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US11/393,906 US20070227713A1 (en) | 2006-03-31 | 2006-03-31 | Heat exchanger tube with a compressed return bend, a serpentine heat exchanger tube with compressed return bends and heat exchanger implementing the same |
PCT/US2007/004914 WO2007126504A1 (en) | 2006-03-31 | 2007-02-28 | Heat exchanger tube with a compressed return bend, a serpentine heat exchanger tube with compressed return bends and heat exchanger implementing the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/393,906 US20070227713A1 (en) | 2006-03-31 | 2006-03-31 | Heat exchanger tube with a compressed return bend, a serpentine heat exchanger tube with compressed return bends and heat exchanger implementing the same |
Publications (1)
Publication Number | Publication Date |
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US20070227713A1 true US20070227713A1 (en) | 2007-10-04 |
Family
ID=38557138
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/393,906 Abandoned US20070227713A1 (en) | 2006-03-31 | 2006-03-31 | Heat exchanger tube with a compressed return bend, a serpentine heat exchanger tube with compressed return bends and heat exchanger implementing the same |
Country Status (2)
Country | Link |
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US (1) | US20070227713A1 (en) |
WO (1) | WO2007126504A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD763417S1 (en) * | 2012-08-02 | 2016-08-09 | Mitsubishi Electric Corporation | Heat exchanger tube |
USD945579S1 (en) * | 2017-12-20 | 2022-03-08 | Rheem Manufacturing Company | Heat exchanger tube with fins |
US11569001B2 (en) | 2008-04-29 | 2023-01-31 | Holtec International | Autonomous self-powered system for removing thermal energy from pools of liquid heated by radioactive materials |
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US5339670A (en) * | 1993-05-24 | 1994-08-23 | Anthony Granelli | Apparatus and method for bending tubing |
US5380048A (en) * | 1992-08-18 | 1995-01-10 | Russell A Division Of Ardco, Inc. | Tube joint |
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US20040194935A1 (en) * | 2003-03-19 | 2004-10-07 | Lg Electronics Inc. | Heat Exchanger |
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-
2006
- 2006-03-31 US US11/393,906 patent/US20070227713A1/en not_active Abandoned
-
2007
- 2007-02-28 WO PCT/US2007/004914 patent/WO2007126504A1/en active Application Filing
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US1786882A (en) * | 1926-11-08 | 1930-12-30 | William B Whitsitt | Superheater tube |
US2462511A (en) * | 1945-01-12 | 1949-02-22 | Kramer Trenton Co | Method of producing condensers or the like for heat exchange apparatus |
US2882953A (en) * | 1954-10-06 | 1959-04-21 | Combustion Eng | Tube bender having a support sleeve with a circular aperture merging into an oval aperture |
US3967489A (en) * | 1975-05-15 | 1976-07-06 | General Electric Company | Method of forming constriction in tubing |
US4467511A (en) * | 1979-07-26 | 1984-08-28 | Collgon Pierre C | Method for the conformation of a metallic tube, particularly for a heat exchanger, and a heat exchanger provided with tubes thus conformed |
US4765168A (en) * | 1987-07-27 | 1988-08-23 | Tools For Bending, Inc. | Method and apparatus for bending tubing |
US5101561A (en) * | 1989-03-14 | 1992-04-07 | Autokuhler Gmbh & Co. Kg | Heat exchanger and a method for a liquid-tight mounting of an end plate to an array heat exchanging elements of the heat exchanger |
US5380048A (en) * | 1992-08-18 | 1995-01-10 | Russell A Division Of Ardco, Inc. | Tube joint |
US5339670A (en) * | 1993-05-24 | 1994-08-23 | Anthony Granelli | Apparatus and method for bending tubing |
US6253558B1 (en) * | 1995-09-29 | 2001-07-03 | Robert Stillwell | Method and system for creating and maintaining a frozen surface |
US20040194935A1 (en) * | 2003-03-19 | 2004-10-07 | Lg Electronics Inc. | Heat Exchanger |
US6820685B1 (en) * | 2004-02-26 | 2004-11-23 | Baltimore Aircoil Company, Inc. | Densified heat transfer tube bundle |
Cited By (3)
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US11569001B2 (en) | 2008-04-29 | 2023-01-31 | Holtec International | Autonomous self-powered system for removing thermal energy from pools of liquid heated by radioactive materials |
USD763417S1 (en) * | 2012-08-02 | 2016-08-09 | Mitsubishi Electric Corporation | Heat exchanger tube |
USD945579S1 (en) * | 2017-12-20 | 2022-03-08 | Rheem Manufacturing Company | Heat exchanger tube with fins |
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