US20150165573A1 - Spiral Exchanger and Method for Manufacturing Such an Exchanger - Google Patents
Spiral Exchanger and Method for Manufacturing Such an Exchanger Download PDFInfo
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- US20150165573A1 US20150165573A1 US14/631,018 US201514631018A US2015165573A1 US 20150165573 A1 US20150165573 A1 US 20150165573A1 US 201514631018 A US201514631018 A US 201514631018A US 2015165573 A1 US2015165573 A1 US 2015165573A1
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- Prior art keywords
- sheet
- winding
- width
- outer sheet
- areas
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/26—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass heat exchangers or the like
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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
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/04—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being formed by spirally-wound plates or laminae
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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
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0006—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the plate-like or laminated conduits being enclosed within a pressure vessel
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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
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
- F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4935—Heat exchanger or boiler making
- Y10T29/49366—Sheet joined to sheet
Definitions
- the invention relates to a spiral exchanger, and to a portion of an exhaust that includes such an exchanger. Furthermore, the invention relates to a method for manufacturing a spiral exchanger.
- spiral exchangers exist in the state of the art. Typically, such exchangers are formed by two superimposed sheets that are then wound and arranged in an exhaust duct of an internal combustion engine.
- the sheets are spaced apart with spacers.
- application FR 2 810 726 A1 discloses a spiral exchanger that is made by two sheets spaced apart that have, on their surfaces across from the inner spacing elements and the opposite surface, respectively, outer spacing elements that are arranged so that the inner and outer spacing elements of one sheet bear on the corresponding inner and outer spacing elements of the other sheet.
- the spacing elements have substantially the same shape.
- a metal strip having spacing elements is formed by folding the edges, which are then connected to one another by welding. The folded metal strip is then wound to form the spiral exchanger.
- Application FR 2 874 080 A1 relates to an exchanger comprising two wound metal sheets.
- the metal sheets are provided with spacing elements in the form of serrations distributed on the surface thereof.
- the inlet and outlet for the fluid, for example water, of the device are done at a center of the spiral. This means that the inlet and outlet tubes will exit on either side of the exchanger and have a complicated trajectory, which is therefore costly.
- the water circulating in such an exchanger is at most at a temperature of 130° C., and therefore significantly below that of the exhaust gas that heats the water. The fact that there are differential expansions between these water tubes and exhaust tubes may cause wear of the materials after extended use.
- the metal sheet on the outer side is always longer than the inner sheet for an equivalent number of winding turns due to its thickness and/or the space between the two metal sheets.
- the two metal sheets are welded before winding, for example as in application FR 2 809 483 A1, deformations will appear on the inner sheet.
- the sheets are often welded during or after winding, for example such as in application FR 2 810 726 A1.
- welding during winding poses manufacturing problems, in particular for thin sheets.
- thin sheets cannot be welded using an electric arc and it is not possible to consider seam welding due to problems of accessing the heel that returns current.
- laser welding is difficult. The welding problem becomes increasingly complicated if it is necessary to perform intermediate welds between two side welds.
- the aim of the present invention is to overcome the drawbacks of the state of the art and in particular to use a spiral exchanger that is easy to manufacture, light, and inexpensive.
- a spiral exchanger has a winding axis and comprises an outer sheet and an inner sheet secured to one another in a fastening plane before winding and delimiting a space for a fluid between them.
- the outer sheet and the inner sheet are wound on themselves and each comprises a plurality of flexible areas and a plurality of rigid areas.
- the flexible areas are more flexible than the rigid areas during folding.
- the flexible areas and the rigid areas are extended along the winding axis, and at least one flexible area of the outer sheet and at least one flexible area of the inner sheet that delimit the space between them form a pair of flexible areas that are aligned in a same radial direction.
- the spiral exchanger includes one or more of the following exemplary features: the flexible areas of the outer sheet and/or the inner sheet are substantially rectilinear; the majority of the flexible areas, in particular all of the flexible areas, of the outer sheet form, with a respective flexible area of the inner sheet, a pair of flexible areas that are aligned in a same radial direction; considered in cross-section in the direction of winding, the rigid areas are formed by flats and the flexible areas are formed by hollow profiles and edges between the hollow profiles and the flats, the hollow profiles in particular being formed toward the winding axis; each flexible area, in particular each hollow profile, of the outer sheet has, over the entire width of the outer sheet in the direction of the winding axis, a rectilinear part that is located at the fastening plane, and in that each flexible area, in particular each edge, of the inner sheet, has, over its entire length parallel to the winding axis, at least one rectilinear portion that is located in the fastening plane to form a plurality of hinge
- a portion of an exhaust includes such an exchanger.
- a method for manufacturing a spiral exchanger comprises the following steps: stamping, in an outer sheet and an inner sheet, a plurality of flexible areas and a plurality of rigid areas, the flexible areas being more flexible than the rigid areas during folding, and the flexible areas and the rigid areas being elongated along the winding axis; aligning the outer sheet and the inner sheet such that at least one flexible area of the outer sheet and at least one flexible area of the inner sheet form a pair of flexible areas that are aligned with one another; permanently fastening the outer sheet to the inner sheet at predetermined locations to form a space between them; and winding the outer sheet and the inner sheet to form the spiral exchanger.
- the method includes one or more of the following exemplary features: considered in the direction of winding, the rigid areas are formed by flats and the flexible areas are formed by hollow profiles and edges between the hollow profiles and the flats, during the winding steps the hollows are oriented toward the winding axis; at least one of the outer or inner sheets comprises a fluid inlet opening for introducing fluid into the space and at least one fluid outlet opening for removing fluid from the space, the sheets having a first end in the winding direction in which the openings are arranged, the winding step starting with a second end opposite the first end; the space formed is U-shaped, W-shaped, or zigzagged, the space having substantially rectilinear branches, the method also comprising a step for cutting the outer and inner sheets between at least two adjacent branches to form a cut-out; and/or the method comprises steps for forming an exchanger according to the invention.
- FIG. 1 is a perspective view of the two sheet metal sheets for a spiral exchanger according to the invention
- FIG. 2 is an exploded schematic view of two sheet metal sheets for a spiral exchanger according to the invention
- FIG. 3 is a side view of two sheet metal sheets for an exchanger according to the invention before connection of the two sheets;
- FIG. 4 is a side view of the two sheet metal sheets for an exchanger according to the invention after connection of the two sheets;
- FIG. 5 is a longitudinal cross-sectional view of a portion of the two sheet metal sheets of an exchanger according to the invention after connection of the two sheets;
- FIG. 6 is a cross-sectional view in the radial plane of a spiral exchanger according to the invention after a winding turn;
- FIG. 7 is a cross-sectional view in a radial plane of the exchanger during mounting in an exhaust
- FIG. 8 is a schematic perspective view of an outer sheet metal sheet for a spiral exchanger according to a second embodiment.
- FIG. 9 is a top view of an outer sheet metal sheet of another embodiment for a spiral exchanger according to the invention.
- FIGS. 1 to 5 schematically show an elongated element of an exchanger 1 before winding to form a spiral exchanger.
- the element 1 comprises two sheet metal sheets 10 , 20 , in particular an outer sheet 10 and an inner sheet 20 that are fastened to one another.
- the inner sheet 20 is radially inside relative to the outer sheet 10 .
- the element 1 has a winding direction Y in which the element 1 is wound.
- the winding direction Y is substantially orthogonal to the winding axis X.
- the length of the element 1 is defined in the winding direction Y and the width of the element 1 is defined in the direction of the winding axis X.
- the inner sheet 20 has a thickness d i larger than a thickness d e of the outer sheet 10 .
- the sheets have a thickness between 0.05 mm and 0.5 mm, in particular between 0.10 mm and 0.4 mm.
- the winding of these sheet metal sheets 10 , 20 requires less effort than winding sheet metal sheets having a higher thickness, for example metal sheets having a thickness from 0.6 mm to 1 mm.
- the outer sheet 10 and the inner sheet 20 have undergone a deformation step, for example stamping, and after that deformation each have a plurality of flexible areas 12 , 22 and a plurality of rigid areas 14 , 24 .
- the rigid 14 , 24 and flexible areas 12 , 22 are elongated parallel to the winding axis X and orthogonally to the winding direction Y.
- the flexible 12 , 22 and rigid 14 , 24 areas are arranged alternately in the winding direction Y.
- the flexible 12 , 22 and rigid 14 , 24 areas extend over the entire width of the element 1 .
- the shape and arrangement of the rigid 14 , 24 and flexible areas 12 , 22 are clearly shown in FIG. 5 .
- a plurality of flats 15 , 25 , a plurality of edges 16 , 26 , and a plurality of hollow profiles 17 , 27 are respectively formed in the outer sheet 10 and the inner sheet 20 .
- the edges 16 , 26 are arranged between the flats 15 , 25 and the hollow profiles 17 , 27 .
- the flats 15 , 25 form the rigid areas 14 , 24 and the edges 16 , 26 , and the hollow profiles 17 , 27 form the flexible areas 12 , 22 .
- the flexible areas 12 of the outer sheet 10 have, in the winding direction Y, a smaller width relative to the length of the flexible areas 22 of the inner sheet 20 .
- the hollow profile 17 has, in the winding direction Y, a smaller width relative to the width of the flats 15 .
- the flats 15 of the outer sheet 10 have a width that is substantially twice the width of the hollow profiles 17 .
- the hollow profiles 27 have, in the winding direction Y, a width larger than the width of the flats 25 .
- the hollow profiles 27 of the inner sheet 20 have a width that is substantially twice the width of the flats 25 .
- the width of the flats 25 of the inner sheet 20 substantially corresponds to the width of the hollow profile 17 of the outer sheet 10
- the width of the flats 15 of the outer sheet 10 corresponds substantially to the width of the hollow profiles 27 of the inner sheet 20 .
- the outer sheet 10 and the inner sheet 20 are arranged one on the other before they are connected, such that the flexible areas 12 , 22 , in particular the hollow profiles 17 , 27 , are placed substantially across from one another.
- the outer sheet 10 is fastened to the inner sheet 20 in a fastening plane S before winding of the element 1 .
- the outer sheet 10 is fastened to the inner sheet 20 by a weld.
- a space 30 is formed between the outer sheet and the inner sheet 20 (see FIG. 5 ).
- the space 30 is provided for circulation of a fluid, for example water.
- a minimum passage section 32 is defined by the space between the hollow profile 17 of the outer sheet 10 and the edges 26 of the inner sheet 20 .
- each flexible area 12 , and therefore each hollow profile 17 , of the outer sheet 10 has, over its entire length along the winding axis X, a rectilinear portion that is located at the fastening plane S. Additionally, the edges 26 and the flats 25 of the inner sheet 20 are in the fastening plane S.
- the element 1 comprises a first end 34 and a second end 35 .
- two openings 36 , 37 are provided in a connection area 38 of the outer sheet 10 , including a first or inlet opening 36 to allow fluid to enter the space 30 and a second or outlet opening 37 to allow the fluid to leave the space 30 .
- the connection area 38 extends along the direction of the winding axis X, and the openings 36 , 37 are provided in a connection flat having a larger width than the flats 15 .
- the distance between the openings 36 , 37 along the winding axis X is larger or smaller relative to the embodiments shown in FIG. 1 .
- the outer sheet 10 is welded to the inner sheet 20 along a weld line 39 (dotted line in FIG. 1 ), which is done such that the space 30 between the two elongated sheets 10 , 20 is generally U-shaped, whereof the branches 40 , 42 are oriented toward the first end 34 , where the inlet and outlet openings 36 , 37 are arranged.
- a longitudinal portion 44 of the weld line 39 is arranged between the branches 40 , 42 . Therefore, during use of the element 1 , the fluid, after entering the space through the first opening 36 , passes through the first branch 40 toward the second end 35 to go from the first branch 40 to the second branch 42 in which the fluid passes through the element 1 from the second end 35 to the second opening 37 .
- the rigid areas 14 of the outer sheet 10 have hollow portions 46 , in particular in the flats 15 .
- the outer sheet 10 bears on the inner sheet 20 , in particular on the flats 25 .
- the hollow portions 46 are made to stabilize the space 30 of the element 1 , in particular to prevent the space 30 from collapsing.
- the hollow portions 46 of the outer sheet 10 are respectively aligned, in the branches 40 , 42 , in the winding direction Y. Nevertheless, in other embodiments, the hollow portions 46 in the rigid areas 14 may be arranged randomly.
- the outer 10 and inner 20 sheets are stamped to form the flexible areas 12 , 22 and the rigid areas 14 , 24 .
- the outer and inner sheets are arranged such that the flexible areas 12 , 22 and the rigid areas 14 , 24 are respectively positioned across from one another (see FIGS. 3 and 4 ).
- the outer sheet 10 is placed relative to the inner sheet 20 such that the passage of the fluid is ensured, and the passage section 32 of the fluid is constant even after the winding.
- outer 10 and inner 20 sheets are fastened to each other by a weld running alongside the weld line 39 , 44 to seal the space 30 between the two sheets relative to the outside of that space and to form the U-shaped trajectory for a fluid passing through the space 30 .
- the outer sheet 10 and the inner sheet 20 can be fastened to one another using a seam weld, laser weld, or, for example, brazing.
- the second end 35 of the element 1 is fastened to a central tube 48 to wind the element 1 from the second end 35 .
- the outer sheet 10 is radially outside the inner sheet 20 during the winding.
- the openings 36 , 37 are turned outward.
- a passage 50 is formed between the outer sheet of a layer and the inner sheet of the successive layer of the wound element 1 , through which the exhaust gas passes to transfer its heat to the fluid circulating in the space 30 of the element 1 .
- the central tube 48 is obstructed.
- the folding of the outer sheet 10 is done in the flexible areas 12 , in particular in the rectilinear portion of the fastening plane S in the hollow profiles 17 .
- the inner sheet 20 is folded at the edges 26 .
- the folding axis will then be situated between the hollow profiles 17 of the outer sheet 10 and the adjacent edges 26 of the inner sheet 20 in the fastening plane S.
- the flexible areas 12 are a reserve of material to make it possible, during winding of the element 1 , to elongate the outer sheet 10 .
- the edges 26 of the inner sheet 20 and the hollow profiles 17 of the outer sheet 10 behave like a hinge during winding of the element 1 .
- the respective deformations of the outer sheet 10 and the inner sheet 20 are therefore different from one another, to allow elongation of the outer sheet relative to the inner sheet during winding of the element 1 .
- the number of winding layers varies and depends on the use of the exchanger. During winding, the passage section 32 does not change significantly.
- FIG. 7 shows the mounting of the exchanger in half-shells 52 , 54 of an exhaust.
- Tubes 56 are fastened to the inlet opening 36 and the outlet opening 37 and are connected to tubes 58 of one of the half-shells 54 of the exhaust.
- the half-shells 52 , 54 constitute a part of the exhaust system of a combustion engine.
- the assembly of the element 1 and the tube 48 is placed in half-shells 52 , 54 , and a fluid is injected through the tubes 56 , 58 into the space 30 of the element 1 .
- the distance between the openings 36 , 37 may be reduced.
- the openings may be positioned such that the exchanger is less sensitive to dimensional variations between the exchanger and the half-shells 52 , 54 .
- the outer and inner sheets 10 , 20 are at the temperature of the fluid while the half-shells 52 , 54 are close to the temperature of the exhaust gas passing through the half-shells.
- a fluid circulating in the exchanger is vaporized and overheated.
- FIG. 8 schematically illustrates an element 101 of an exchanger provided to vaporize fluid.
- the elements of the embodiment of FIG. 8 that are identical or perform the same function as those of the embodiment of FIGS. 1 to 7 will be designated using the same references plus 100 .
- a space to guide the fluid between the two sheets 110 is generally U-shaped with a first branch 140 and a second branch 142 .
- the first branch 140 and the second branch 142 are separated from one another by a longitudinal cut-out 160 in the winding direction Y.
- a width L1 of the first branch 140 bearing the inlet opening 136 is larger than the width L2 of the second branch 142 bearing the outlet opening 137 .
- a passage section for the fluid in the space in the second branch 142 is then smaller than a passage section of the fluid in the space in the first branch 140 .
- the width L2 of the second branch 142 is between 10% and 80% smaller, in particular between 20% and 60% smaller, than the width L1 of the first branch 140 . In one embodiment, the width L2 of the second branch 142 is 33% smaller than the width L1 of the first branch 140 for a mass flow of 30 liters/hour.
- the fluid enters in liquid form into the inlet opening 136 , passes through the first branch 140 , turns around at the second end 135 , passes through the second branch 142 , and leaves through the outlet opening 137 in gas form.
- FIG. 9 illustrates another embodiment of an element 201 for a spiral exchanger.
- FIG. 9 shows an exchanger for vaporizing a fluid.
- FIG. 9 is a schematic top view of an outer sheet 210 of an element 201 .
- the elements of the embodiment of FIG. 9 that are identical or perform the same function as those of the embodiment of FIGS. 1 to 7 will be designated using the same references plus 200 .
- the outer sheet 210 has flexible areas 212 and rigid areas 214 that are arranged alternatingly in the direction of winding Y.
- the space between the inner and outer sheets 210 is formed such that the fluid is guided by a W-shaped trajectory (shown upside down in FIG. 9 ).
- the element 204 therefore has four branches 240 , 241 , 242 and 243 . In other embodiments, the element has more than four branches.
- the branches 240 , 241 , 242 and 243 respectively extend in the winding direction Y and have, between two respective adjacent branches, cut-outs 260 , 262 , 264 to separate one of the branches from the other adjacent branches.
- the inner and outer sheets 210 are cut by the cut-outs 260 , 262 , 264 .
- the first branch 240 is connected to the second branch 241 at the second end 235
- the second branch 241 is connected to the third branch 242 at the first end 234
- the third branch 242 is connected to the fourth and final branch 243 at the second end 235 .
- the element 201 has an inlet opening 236 and an outlet opening 237 .
- the inlet opening 236 is arranged at the first end 234 of the first branch 240 .
- the outlet opening 237 is arranged in a fourth branch 243 at the first end 234 .
- the fluid enters in liquid form into the inlet opening 236 and exits through the outlet opening 337 in gas form.
- the branches have, in the direction of the winding axis, a width L1, L2, L3, L4, the width of the branches 240 , 241 , 242 , 243 decreasing gradually in that order.
- the width L2 of the second branch 241 is decreased by 33% relative to the width L1 of the first branch 240 .
- the widths L3, L4 of the third branch 242 and the fourth branch 243 are approximately half the width L1 of the first branch 240 .
- the first branch 240 has a width L1 of approximately 50 mm.
- the hollow portions 246 and the rigid areas 214 of the branches 240 , 241 , 242 , 243 , where the rigid area 214 of the outer sheet 210 bears against the rigid area of the inner sheet, are not aligned in the winding direction Y to create more perturbations of the fluid.
- the fluid is introduced into the element 101 , 201 of the exchanger at a temperature of from 80° C. to 100° C. and vaporizes, while absorbing the heat given off by the exhaust gases.
- the evaporation takes considerable energy from the exhaust gases, and the temperatures of the outer and inner sheets in that area are therefore the same as that of the fluid.
- the vapor from the fluid will behave like a gas as it overheats.
- the final temperature of the overheated vapor is approximately 200° C. to 500° C. or more depending on the pressure.
- the temperature of the sheets of the exchanger is comprised between the vapor and that of the exhaust gas.
- the exchanger thus has a high temperature gradient between the fluid inlet in the exchanger (90° C. to 100° C.) and the fluid outlet (400 to 650° C.). For that reason, the cut-outs 60 , 260 , 262 , 264 are formed in the elements 101 , 201 , as the heat expansion of each branch is different.
- the fluid for example has a volume 1,680 times larger than that in liquid form, which means that at an equal mass flow, the volume flow rate is much higher, and therefore its speed is higher.
- the final speed of the vapor is a very important parameter in correctly vaporizing and overheating the vapor. In fact, the greater the speed, the more the heat exchanges at the wall of the space between the two sheets are good. That is why the passage section offered to the steam is reduced. In the embodiments of FIGS. 8 and 9 , this reduction is proportional to the width of the branches. This makes it possible to increase the speed, and therefore further increase the heat exchanges.
- the first branch 240 has a first area that corresponds to an area in which the fluid is heated until the first microbubbles appear (beginning of vaporization).
- the vaporization will effectively take place in the second branch 241 .
- the movement of the fluid is accelerated in the second branch 241 by narrowing the passage section to favor vaporization.
- the vapor is transformed from a wet or saturated vapor to an overheated vapor.
- decreasing the passage section makes it possible to increase the speed of the vapor, and thus the turbulence and therefore the heat exchange.
- the fluid circulating in the exchanger according to the invention is water or another liquid.
- the liquid is an organic fluid, for example ethanol.
- the exchanger according to the invention allows great flexibility.
- the passage section of the fluid is managed over the course of the latter's conversion into overheated vapor.
- the passage sections are varied depending on the anticipated temperatures of the exhaust gas.
- the length of the sheet metal sheets in the winding direction is varied as a function of the desired vapor quality and available energy in the exhaust gas.
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
A spiral exchanger has a winding axis and comprises an outer sheet and an inner sheet secured to one another in a fastening plane before winding and delimiting a space for a fluid between them. The outer sheet and the inner sheet are wound on themselves and each comprises a plurality of flexible areas and a plurality of rigid areas, the flexible areas being more flexible than the rigid areas during folding. The flexible areas and the rigid areas are extended along the winding axis, and at least one flexible area of the outer sheet and at least one flexible area of the inner sheet that delimit the space between them form a pair of flexible areas that are aligned in a same radial direction.
Description
- This application is a divisional of U.S. patent application Ser. No. 13/676,425, filed Nov. 14, 2012, which claims priority to FR 11 60354, filed Nov. 15, 2011.
- The invention relates to a spiral exchanger, and to a portion of an exhaust that includes such an exchanger. Furthermore, the invention relates to a method for manufacturing a spiral exchanger.
- Several types of spiral exchangers exist in the state of the art. Typically, such exchangers are formed by two superimposed sheets that are then wound and arranged in an exhaust duct of an internal combustion engine.
- In one type of spiral exchanger, the sheets are spaced apart with spacers. For example, application FR 2 810 726 A1 discloses a spiral exchanger that is made by two sheets spaced apart that have, on their surfaces across from the inner spacing elements and the opposite surface, respectively, outer spacing elements that are arranged so that the inner and outer spacing elements of one sheet bear on the corresponding inner and outer spacing elements of the other sheet. The spacing elements have substantially the same shape. In application FR 2 809 483 A1, a metal strip having spacing elements is formed by folding the edges, which are then connected to one another by welding. The folded metal strip is then wound to form the spiral exchanger.
- Application FR 2 874 080 A1 relates to an exchanger comprising two wound metal sheets. The metal sheets are provided with spacing elements in the form of serrations distributed on the surface thereof. Furthermore, the inlet and outlet for the fluid, for example water, of the device are done at a center of the spiral. This means that the inlet and outlet tubes will exit on either side of the exchanger and have a complicated trajectory, which is therefore costly. Typically, the water circulating in such an exchanger is at most at a temperature of 130° C., and therefore significantly below that of the exhaust gas that heats the water. The fact that there are differential expansions between these water tubes and exhaust tubes may cause wear of the materials after extended use.
- Generally, when two metal sheets are wound on one another, the metal sheet on the outer side is always longer than the inner sheet for an equivalent number of winding turns due to its thickness and/or the space between the two metal sheets. If the two metal sheets are welded before winding, for example as in application FR 2 809 483 A1, deformations will appear on the inner sheet. As a result, in the prior art, the sheets are often welded during or after winding, for example such as in application FR 2 810 726 A1. Nevertheless, welding during winding poses manufacturing problems, in particular for thin sheets. In fact, thin sheets cannot be welded using an electric arc and it is not possible to consider seam welding due to problems of accessing the heel that returns current. Furthermore, laser welding is difficult. The welding problem becomes increasingly complicated if it is necessary to perform intermediate welds between two side welds.
- The aim of the present invention is to overcome the drawbacks of the state of the art and in particular to use a spiral exchanger that is easy to manufacture, light, and inexpensive.
- A spiral exchanger has a winding axis and comprises an outer sheet and an inner sheet secured to one another in a fastening plane before winding and delimiting a space for a fluid between them. The outer sheet and the inner sheet are wound on themselves and each comprises a plurality of flexible areas and a plurality of rigid areas. The flexible areas are more flexible than the rigid areas during folding. The flexible areas and the rigid areas are extended along the winding axis, and at least one flexible area of the outer sheet and at least one flexible area of the inner sheet that delimit the space between them form a pair of flexible areas that are aligned in a same radial direction.
- The spiral exchanger includes one or more of the following exemplary features: the flexible areas of the outer sheet and/or the inner sheet are substantially rectilinear; the majority of the flexible areas, in particular all of the flexible areas, of the outer sheet form, with a respective flexible area of the inner sheet, a pair of flexible areas that are aligned in a same radial direction; considered in cross-section in the direction of winding, the rigid areas are formed by flats and the flexible areas are formed by hollow profiles and edges between the hollow profiles and the flats, the hollow profiles in particular being formed toward the winding axis; each flexible area, in particular each hollow profile, of the outer sheet has, over the entire width of the outer sheet in the direction of the winding axis, a rectilinear part that is located at the fastening plane, and in that each flexible area, in particular each edge, of the inner sheet, has, over its entire length parallel to the winding axis, at least one rectilinear portion that is located in the fastening plane to form a plurality of hinges in the fastening plane; a plurality of rigid areas, in particular a plurality of flats, of the outer sheet is provided with at least one hollow portion, each hollow portion bearing against a rigid area of the inner sheet; the exchanger comprises at least one fluid inlet opening to introduce fluid into the space and at least one fluid outlet opening to remove fluid from the space, the inlet opening(s) and outlet opening(s) being arranged at a first end of one of the outer sheet or the inner sheet in the winding direction, the first end being opposite a second end at which the winding began; the space is U-shaped, W-shaped, or zigzagged, having substantially rectilinear branches; the outer sheet and the inner sheet are fastened to one another respectively between two branches; the outer sheet and the inner sheet have a respective cut-out between two branches; an average passage diameter in the space decreases between the inlet opening(s) and the outlet opening(s); each branch has a substantially constant width and the width of the branches in the direction of the winding axis of the at least two adjacent branches decreases one relative to the other; and/or the outer sheet and/or the inner sheet is/are made up of a metal sheet.
- Furthermore, in another embodiment, a portion of an exhaust includes such an exchanger.
- Additionally, a method for manufacturing a spiral exchanger comprises the following steps: stamping, in an outer sheet and an inner sheet, a plurality of flexible areas and a plurality of rigid areas, the flexible areas being more flexible than the rigid areas during folding, and the flexible areas and the rigid areas being elongated along the winding axis; aligning the outer sheet and the inner sheet such that at least one flexible area of the outer sheet and at least one flexible area of the inner sheet form a pair of flexible areas that are aligned with one another; permanently fastening the outer sheet to the inner sheet at predetermined locations to form a space between them; and winding the outer sheet and the inner sheet to form the spiral exchanger.
- The method includes one or more of the following exemplary features: considered in the direction of winding, the rigid areas are formed by flats and the flexible areas are formed by hollow profiles and edges between the hollow profiles and the flats, during the winding steps the hollows are oriented toward the winding axis; at least one of the outer or inner sheets comprises a fluid inlet opening for introducing fluid into the space and at least one fluid outlet opening for removing fluid from the space, the sheets having a first end in the winding direction in which the openings are arranged, the winding step starting with a second end opposite the first end; the space formed is U-shaped, W-shaped, or zigzagged, the space having substantially rectilinear branches, the method also comprising a step for cutting the outer and inner sheets between at least two adjacent branches to form a cut-out; and/or the method comprises steps for forming an exchanger according to the invention.
- Other features and advantages of the present invention will emerge from the description thereof provided below, in reference to the drawings, which illustrates several non-limiting embodiments and in which:
-
FIG. 1 is a perspective view of the two sheet metal sheets for a spiral exchanger according to the invention; -
FIG. 2 is an exploded schematic view of two sheet metal sheets for a spiral exchanger according to the invention; -
FIG. 3 is a side view of two sheet metal sheets for an exchanger according to the invention before connection of the two sheets; -
FIG. 4 is a side view of the two sheet metal sheets for an exchanger according to the invention after connection of the two sheets; -
FIG. 5 is a longitudinal cross-sectional view of a portion of the two sheet metal sheets of an exchanger according to the invention after connection of the two sheets; -
FIG. 6 is a cross-sectional view in the radial plane of a spiral exchanger according to the invention after a winding turn; -
FIG. 7 is a cross-sectional view in a radial plane of the exchanger during mounting in an exhaust; -
FIG. 8 is a schematic perspective view of an outer sheet metal sheet for a spiral exchanger according to a second embodiment; and -
FIG. 9 is a top view of an outer sheet metal sheet of another embodiment for a spiral exchanger according to the invention. - A first embodiment will be described using
FIGS. 1 to 5 .FIGS. 1 to 5 schematically show an elongated element of anexchanger 1 before winding to form a spiral exchanger. Theelement 1 comprises twosheet metal sheets outer sheet 10 and aninner sheet 20 that are fastened to one another. During winding of theelement 1 around the winding axis X (seeFIG. 6 ), theinner sheet 20 is radially inside relative to theouter sheet 10. - The
element 1 has a winding direction Y in which theelement 1 is wound. The winding direction Y is substantially orthogonal to the winding axis X. The length of theelement 1 is defined in the winding direction Y and the width of theelement 1 is defined in the direction of the winding axis X. - The
inner sheet 20 has a thickness di larger than a thickness de of theouter sheet 10. Typically, the sheets have a thickness between 0.05 mm and 0.5 mm, in particular between 0.10 mm and 0.4 mm. The winding of thesesheet metal sheets - The
outer sheet 10 and theinner sheet 20 have undergone a deformation step, for example stamping, and after that deformation each have a plurality offlexible areas rigid areas flexible areas element 1. - The shape and arrangement of the rigid 14, 24 and
flexible areas FIG. 5 . During the deformation, a plurality offlats edges hollow profiles outer sheet 10 and theinner sheet 20. Theedges flats hollow profiles flats rigid areas edges hollow profiles flexible areas flexible areas 12 of theouter sheet 10 have, in the winding direction Y, a smaller width relative to the length of theflexible areas 22 of theinner sheet 20. - In the
outer sheet 10, thehollow profile 17 has, in the winding direction Y, a smaller width relative to the width of theflats 15. For example, theflats 15 of theouter sheet 10 have a width that is substantially twice the width of the hollow profiles 17. - In the
inner sheet 20, thehollow profiles 27 have, in the winding direction Y, a width larger than the width of theflats 25. For example, thehollow profiles 27 of theinner sheet 20 have a width that is substantially twice the width of theflats 25. - In the embodiment of
FIGS. 1 to 5 , the width of theflats 25 of theinner sheet 20 substantially corresponds to the width of thehollow profile 17 of theouter sheet 10, and the width of theflats 15 of theouter sheet 10 corresponds substantially to the width of thehollow profiles 27 of theinner sheet 20. - The
outer sheet 10 and theinner sheet 20 are arranged one on the other before they are connected, such that theflexible areas hollow profiles - The
outer sheet 10 is fastened to theinner sheet 20 in a fastening plane S before winding of theelement 1. For example, theouter sheet 10 is fastened to theinner sheet 20 by a weld. When thesheets space 30 is formed between the outer sheet and the inner sheet 20 (seeFIG. 5 ). - The
space 30 is provided for circulation of a fluid, for example water. For a fluid circulating in thespace 30, a minimum passage section 32 is defined by the space between thehollow profile 17 of theouter sheet 10 and theedges 26 of theinner sheet 20. - As shown in
FIG. 5 , eachflexible area 12, and therefore eachhollow profile 17, of theouter sheet 10 has, over its entire length along the winding axis X, a rectilinear portion that is located at the fastening plane S. Additionally, theedges 26 and theflats 25 of theinner sheet 20 are in the fastening plane S. - In the winding direction Y, the
element 1 comprises afirst end 34 and asecond end 35. At thefirst end 34 of theelement 1, twoopenings connection area 38 of theouter sheet 10, including a first or inlet opening 36 to allow fluid to enter thespace 30 and a second or outlet opening 37 to allow the fluid to leave thespace 30. Theconnection area 38 extends along the direction of the winding axis X, and theopenings flats 15. In another embodiment, the distance between theopenings FIG. 1 . - The
outer sheet 10 is welded to theinner sheet 20 along a weld line 39 (dotted line inFIG. 1 ), which is done such that thespace 30 between the twoelongated sheets branches first end 34, where the inlet andoutlet openings longitudinal portion 44 of theweld line 39 is arranged between thebranches element 1, the fluid, after entering the space through thefirst opening 36, passes through thefirst branch 40 toward thesecond end 35 to go from thefirst branch 40 to thesecond branch 42 in which the fluid passes through theelement 1 from thesecond end 35 to thesecond opening 37. - The
rigid areas 14 of theouter sheet 10 havehollow portions 46, in particular in theflats 15. At thehollow portions 46, theouter sheet 10 bears on theinner sheet 20, in particular on theflats 25. Thehollow portions 46 are made to stabilize thespace 30 of theelement 1, in particular to prevent thespace 30 from collapsing. In the embodiment ofFIG. 1 , thehollow portions 46 of theouter sheet 10 are respectively aligned, in thebranches hollow portions 46 in therigid areas 14 may be arranged randomly. - The assembly of the spiral exchanger is described below.
- In a first step, the outer 10 and inner 20 sheets are stamped to form the
flexible areas rigid areas flexible areas rigid areas FIGS. 3 and 4 ). Theouter sheet 10 is placed relative to theinner sheet 20 such that the passage of the fluid is ensured, and the passage section 32 of the fluid is constant even after the winding. - Next, the outer 10 and inner 20 sheets are fastened to each other by a weld running alongside the
weld line space 30 between the two sheets relative to the outside of that space and to form the U-shaped trajectory for a fluid passing through thespace 30. Theouter sheet 10 and theinner sheet 20 can be fastened to one another using a seam weld, laser weld, or, for example, brazing. - In a subsequent step, as shown in
FIG. 6 , thesecond end 35 of theelement 1 is fastened to acentral tube 48 to wind theelement 1 from thesecond end 35. Theouter sheet 10 is radially outside theinner sheet 20 during the winding. Once theelement 1 is wound, theopenings passage 50 is formed between the outer sheet of a layer and the inner sheet of the successive layer of thewound element 1, through which the exhaust gas passes to transfer its heat to the fluid circulating in thespace 30 of theelement 1. In an embodiment, thecentral tube 48 is obstructed. - During the winding, the folding of the
outer sheet 10 is done in theflexible areas 12, in particular in the rectilinear portion of the fastening plane S in the hollow profiles 17. Theinner sheet 20 is folded at theedges 26. The folding axis will then be situated between thehollow profiles 17 of theouter sheet 10 and theadjacent edges 26 of theinner sheet 20 in the fastening plane S. In theouter sheet 10, theflexible areas 12 are a reserve of material to make it possible, during winding of theelement 1, to elongate theouter sheet 10. In any case, theedges 26 of theinner sheet 20 and thehollow profiles 17 of theouter sheet 10 behave like a hinge during winding of theelement 1. The respective deformations of theouter sheet 10 and theinner sheet 20 are therefore different from one another, to allow elongation of the outer sheet relative to the inner sheet during winding of theelement 1. The number of winding layers varies and depends on the use of the exchanger. During winding, the passage section 32 does not change significantly. -
FIG. 7 shows the mounting of the exchanger in half-shells Tubes 56 are fastened to theinlet opening 36 and theoutlet opening 37 and are connected totubes 58 of one of the half-shells 54 of the exhaust. Once assembled, the half-shells element 1 and thetube 48 is placed in half-shells tubes space 30 of theelement 1. - In one embodiment, the distance between the
openings shells inner sheets shells - In other embodiments, which are described relative to
FIGS. 8 and 9 , a fluid circulating in the exchanger is vaporized and overheated. -
FIG. 8 schematically illustrates anelement 101 of an exchanger provided to vaporize fluid. The elements of the embodiment ofFIG. 8 that are identical or perform the same function as those of the embodiment ofFIGS. 1 to 7 will be designated using the same references plus 100. - In the same way, it has
flexible areas 112 andrigid areas 114 to allow winding with controlled deformations. The same principle as in the embodiment ofFIGS. 1 to 7 is used. As in the embodimentFIGS. 1 to 7 , a space to guide the fluid between the twosheets 110 is generally U-shaped with afirst branch 140 and asecond branch 142. UnlikeFIG. 1 , thefirst branch 140 and thesecond branch 142 are separated from one another by a longitudinal cut-out 160 in the winding direction Y. A width L1 of thefirst branch 140 bearing theinlet opening 136 is larger than the width L2 of thesecond branch 142 bearing theoutlet opening 137. A passage section for the fluid in the space in thesecond branch 142 is then smaller than a passage section of the fluid in the space in thefirst branch 140. The width L2 of thesecond branch 142 is between 10% and 80% smaller, in particular between 20% and 60% smaller, than the width L1 of thefirst branch 140. In one embodiment, the width L2 of thesecond branch 142 is 33% smaller than the width L1 of thefirst branch 140 for a mass flow of 30 liters/hour. - In fact, during operation of the exchanger, the fluid enters in liquid form into the
inlet opening 136, passes through thefirst branch 140, turns around at thesecond end 135, passes through thesecond branch 142, and leaves through the outlet opening 137 in gas form. -
FIG. 9 illustrates another embodiment of anelement 201 for a spiral exchanger. In particular,FIG. 9 shows an exchanger for vaporizing a fluid.FIG. 9 is a schematic top view of anouter sheet 210 of anelement 201. The elements of the embodiment ofFIG. 9 that are identical or perform the same function as those of the embodiment ofFIGS. 1 to 7 will be designated using the same references plus 200. - The
outer sheet 210 hasflexible areas 212 and rigid areas 214 that are arranged alternatingly in the direction of winding Y. - The space between the inner and
outer sheets 210 is formed such that the fluid is guided by a W-shaped trajectory (shown upside down inFIG. 9 ). The element 204 therefore has fourbranches branches outs outer sheets 210 are cut by the cut-outs first branch 240 is connected to thesecond branch 241 at thesecond end 235, thesecond branch 241 is connected to thethird branch 242 at thefirst end 234, and thethird branch 242 is connected to the fourth andfinal branch 243 at thesecond end 235. - The
element 201 has aninlet opening 236 and anoutlet opening 237. Theinlet opening 236 is arranged at thefirst end 234 of thefirst branch 240. Theoutlet opening 237 is arranged in afourth branch 243 at thefirst end 234. In fact, during operation of the exchanger, the fluid enters in liquid form into theinlet opening 236 and exits through the outlet opening 337 in gas form. - The branches have, in the direction of the winding axis, a width L1, L2, L3, L4, the width of the
branches second branch 241 is decreased by 33% relative to the width L1 of thefirst branch 240. The widths L3, L4 of thethird branch 242 and thefourth branch 243, respectively, are approximately half the width L1 of thefirst branch 240. In an embodiment, thefirst branch 240 has a width L1 of approximately 50 mm. - Contrary to the embodiment presented relative to
FIGS. 1 to 8 , thehollow portions 246 and the rigid areas 214 of thebranches outer sheet 210 bears against the rigid area of the inner sheet, are not aligned in the winding direction Y to create more perturbations of the fluid. - During operation of the exchangers for the vaporization of
FIGS. 8 and 9 , the fluid is introduced into theelement outlet 237 of the vapor, the temperature of the sheets of the exchanger is comprised between the vapor and that of the exhaust gas. The exchanger thus has a high temperature gradient between the fluid inlet in the exchanger (90° C. to 100° C.) and the fluid outlet (400 to 650° C.). For that reason, the cut-outs elements - In gaseous form, the fluid for example has a volume 1,680 times larger than that in liquid form, which means that at an equal mass flow, the volume flow rate is much higher, and therefore its speed is higher. The final speed of the vapor is a very important parameter in correctly vaporizing and overheating the vapor. In fact, the greater the speed, the more the heat exchanges at the wall of the space between the two sheets are good. That is why the passage section offered to the steam is reduced. In the embodiments of
FIGS. 8 and 9 , this reduction is proportional to the width of the branches. This makes it possible to increase the speed, and therefore further increase the heat exchanges. - For example, in the element of
FIG. 9 , thefirst branch 240 has a first area that corresponds to an area in which the fluid is heated until the first microbubbles appear (beginning of vaporization). Next, the vaporization will effectively take place in thesecond branch 241. The movement of the fluid is accelerated in thesecond branch 241 by narrowing the passage section to favor vaporization. In thethird branch 242 and thefourth branch 243, the vapor is transformed from a wet or saturated vapor to an overheated vapor. There again, decreasing the passage section makes it possible to increase the speed of the vapor, and thus the turbulence and therefore the heat exchange. - The fluid circulating in the exchanger according to the invention is water or another liquid. In one embodiment, the liquid is an organic fluid, for example ethanol.
- Generally, the exchanger according to the invention allows great flexibility. In some embodiments, the passage section of the fluid is managed over the course of the latter's conversion into overheated vapor. In other embodiments, the passage sections are varied depending on the anticipated temperatures of the exhaust gas. According to one embodiment, the length of the sheet metal sheets in the winding direction is varied as a function of the desired vapor quality and available energy in the exhaust gas.
- Although an embodiment of this invention has been disclosed, a worker of ordinary skill in this art would recognize that certain modifications would come within the scope of this invention. For that reason, the following claims should be studied to determine the true scope and content of this invention.
Claims (20)
1. A method for manufacturing a spiral exchanger comprising the following steps:
stamping, in an outer sheet and an inner sheet, a plurality of flexible areas and a plurality of rigid areas, the flexible areas being more flexible than the rigid areas during folding, and the flexible areas and the rigid areas being elongated along a winding axis;
aligning the outer sheet and the inner sheet such that at least one flexible area of the outer sheet and at least one flexible area of the inner sheet form a pair of flexible areas that are aligned with one another in a same radial direction;
permanently fastening the outer sheet to the inner sheet at predetermined locations to form a space between the outer and inner sheets; and
winding the outer sheet and the inner sheet about the winding axis to form the spiral exchanger.
2. The method according to claim 1 , wherein when considered in a direction of winding, the rigid areas are formed by flats and the flexible areas are formed by hollow profiles and edges are formed between the hollow profiles and the flats, and wherein, during the winding steps, the hollows are oriented toward the winding axis.
3. The method according to claim 1 , wherein at least one of the outer or inner sheets comprises a fluid inlet opening to introduce fluid into the space and at least one fluid outlet opening to remove fluid from the space, the at least one of the outer or inner sheets having a first end in a winding direction in which the fluid inlet and outlet openings are arranged, the winding step starting with a second end opposite the first end.
4. The method according to claim 3 , wherein an average passage diameter in the space decreases between the at least one fluid inlet opening and the at least one fluid outlet opening.
5. The method according to claim 1 , wherein the space formed is U-shaped, W-shaped, or zigzagged, the space having rectilinear branches, the method also comprising a step for cutting the outer and inner sheets between at least two adjacent branches to form a cut-out.
6. The method according to claim 5 , wherein each branch has a substantially constant width and the width of the branches in a direction of the winding axis of the at least two adjacent branches decreases one relative to the other.
7. The method according to claim 1 , wherein each flexible area, in particular each hollow profile of the outer sheet has, over an entire width of the outer sheet in the direction of the winding axis, a rectilinear part that is located at the fastening plane, and wherein each flexible area, in particular each edge of the inner sheet, has, over its entire length parallel to the winding axis, at least one rectilinear portion that is located in the fastening plane to form a plurality of hinges in the fastening plane.
8. The method according to claim 1 , wherein a plurality of rigid areas comprising a plurality of flats of the outer sheet is provided with at least one hollow portion, each hollow portion bearing against a rigid area selected from the rigid areas of the inner sheet subsequent to winding.
9. The method according to claim 1 , including forming at least one fluid inlet opening to introduce fluid into the space and at least one fluid outlet opening to remove fluid from the space, the at least one inlet opening and the at least one outlet opening being arranged at a first end of one of the outer sheet or the inner sheet in the winding direction, the first end being opposite a second end at which the winding began.
10. The method according to claim 9 , including forming the space to have at least two branches, and fastening the outer sheet and the inner sheet together between the two branches.
11. The method according to claim 1 , wherein when considered in cross-section in a direction of winding, further including the steps of forming the rigid areas as flats and the flexible areas as hollow profiles, and forming edges between the hollow profiles and the flats, the hollow profiles in particular being formed toward the winding axis.
12. The method according to claim 11 , wherein the hollow profiles of the outer sheet are, in a winding direction, defined by a first width, and wherein the hollow profiles of the inner sheet are, in the winding direction, defined by a second width that is greater than the first width.
13. The method according to claim 12 , wherein the hollow profiles of the outer sheet have, in a winding direction, a smaller width relative to a width of the flats of the outer sheet.
14. The method according to claim 13 , wherein the width of the flats of the outer sheet is approximately twice the width of the hollow profiles of the outer sheet.
15. The method according to claim 13 , wherein the hollow profiles of the inner sheet have, in the winding direction, a width larger than a width of the flats of the inner sheet.
16. The method according to claim 15 , wherein the width of the hollow profiles of the inner sheet is approximately twice the width of the flats of the inner sheet.
17. The method according to claim 15 , wherein the width of the flats of the inner sheet corresponds to the width of the hollow profiles of the outer sheet, and the width of the flats of the outer sheet corresponds to the width of the hollow profiles of the inner sheet.
18. The method according to claim 1 , wherein at least one of the flexible areas of the outer sheet and the flexible areas of the inner sheet are substantially rectilinear.
19. The method according to claim 1 , wherein, after winding the outer sheet and the inner sheet about the winding axis to form the spiral exchanger, a majority of the flexible areas of the outer sheet form, with a respective flexible area of the inner sheet, a pair of flexible areas that are aligned in a same radial direction.
20. The method according to claim 1 , wherein at least one of the outer sheet and the inner sheet comprise a metal sheet.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/631,018 US20150165573A1 (en) | 2011-11-15 | 2015-02-25 | Spiral Exchanger and Method for Manufacturing Such an Exchanger |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1160354 | 2011-11-15 | ||
FR1160354A FR2982662B1 (en) | 2011-11-15 | 2011-11-15 | SPIRAL-SHAPED EXCHANGER AND METHOD OF MANUFACTURING SUCH EXCHANGER |
US13/676,425 US9481055B2 (en) | 2011-11-15 | 2012-11-14 | Spiral exchanger and method for manufacturing such an exchanger |
US14/631,018 US20150165573A1 (en) | 2011-11-15 | 2015-02-25 | Spiral Exchanger and Method for Manufacturing Such an Exchanger |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US13/676,425 Division US9481055B2 (en) | 2011-11-15 | 2012-11-14 | Spiral exchanger and method for manufacturing such an exchanger |
Publications (1)
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US20150165573A1 true US20150165573A1 (en) | 2015-06-18 |
Family
ID=48145257
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US13/676,425 Expired - Fee Related US9481055B2 (en) | 2011-11-15 | 2012-11-14 | Spiral exchanger and method for manufacturing such an exchanger |
US14/631,018 Abandoned US20150165573A1 (en) | 2011-11-15 | 2015-02-25 | Spiral Exchanger and Method for Manufacturing Such an Exchanger |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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US13/676,425 Expired - Fee Related US9481055B2 (en) | 2011-11-15 | 2012-11-14 | Spiral exchanger and method for manufacturing such an exchanger |
Country Status (3)
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US (2) | US9481055B2 (en) |
DE (1) | DE102012022302A1 (en) |
FR (1) | FR2982662B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016103458A1 (en) * | 2016-02-26 | 2017-08-31 | Hanon Systems | Wrap heat exchanger |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3020869A1 (en) * | 2014-05-07 | 2015-11-13 | Faurecia Sys Echappement | HEAT EXCHANGER, EXHAUST LINE COMPRISING SUCH AN EXCHANGER, PROCESS FOR MANUFACTURING, AND CORRESPONDING HEAT OPERATING METHOD |
US11208934B2 (en) | 2019-02-25 | 2021-12-28 | Cummins Emission Solutions Inc. | Systems and methods for mixing exhaust gas and reductant |
JP7303647B2 (en) * | 2019-03-20 | 2023-07-05 | 株式会社Subaru | spiral heat exchanger |
CN112676770B (en) * | 2020-10-30 | 2022-04-19 | 厦门大学 | Laser-induced multi-scale micro-channel self-assembly forming processing method |
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US20030102114A1 (en) * | 2000-05-26 | 2003-06-05 | Jean-Marie Gueguen | Spiral heat exchangers |
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US1110065A (en) * | 1910-07-20 | 1914-09-08 | Torbjoern Linga | Radiator and method for manufacturing the same. |
US1826344A (en) * | 1930-09-23 | 1931-10-06 | Res & Dev Corp | Heat exchange element |
FR835161A (en) * | 1937-03-12 | 1938-12-14 | heat exchanger | |
US3229763A (en) * | 1963-07-16 | 1966-01-18 | Rosenblad Corp | Flexible plate heat exchangers with variable spacing |
CH613512A5 (en) * | 1976-07-30 | 1979-09-28 | Sulzer Ag | |
US4274186A (en) * | 1978-05-26 | 1981-06-23 | United States Steel Corporation | Heat exchanger |
US4270602A (en) * | 1978-08-30 | 1981-06-02 | The Garrett Corporation | Heat exchanger |
DE3031698A1 (en) * | 1980-08-22 | 1982-03-04 | Rudibert Dipl.-Ing. 7148 Remseck Götzenberger | Liq. or gas heat-exchanger - comprises strip of flexible sheets welded together with ribs or grooves |
DE3039693A1 (en) * | 1980-10-21 | 1982-04-29 | Gunnar 7770 Überlingen Larsson | METHOD AND DEVICE FOR MANUFACTURING HEAT EXCHANGER ELEMENTS, LIKE RADIATOR SEGMENTS, REFRIGERATORS, ETC. |
FR2810726B1 (en) | 2000-06-27 | 2004-05-28 | Spirec | MULTI-GAP SPIRAL EXCHANGER |
DE10034343C2 (en) * | 2000-07-14 | 2003-04-24 | Balcke Duerr Energietech Gmbh | Plate heat exchanger |
GB2372559B (en) * | 2001-02-21 | 2005-01-05 | Rolls Royce Plc | A heat exchanger |
GB0318838D0 (en) * | 2003-08-12 | 2003-09-10 | Rolls Royce Plc | A heat exchanger and a method of manufacturing a heat exchanger |
FR2874080A1 (en) | 2004-08-09 | 2006-02-10 | Spirec Sa | DEFORMABLE EXCHANGER |
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2011
- 2011-11-15 FR FR1160354A patent/FR2982662B1/en not_active Expired - Fee Related
-
2012
- 2012-11-14 DE DE102012022302A patent/DE102012022302A1/en not_active Withdrawn
- 2012-11-14 US US13/676,425 patent/US9481055B2/en not_active Expired - Fee Related
-
2015
- 2015-02-25 US US14/631,018 patent/US20150165573A1/en not_active Abandoned
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GB960975A (en) * | 1962-05-30 | 1964-06-17 | Uddeholms Ab | Heat exchanger element |
US20030102114A1 (en) * | 2000-05-26 | 2003-06-05 | Jean-Marie Gueguen | Spiral heat exchangers |
US20120175095A1 (en) * | 2011-01-12 | 2012-07-12 | Saade Makhlouf | Heat exchanger manifold and method of manufacture |
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DE102016103458A1 (en) * | 2016-02-26 | 2017-08-31 | Hanon Systems | Wrap heat exchanger |
US10590816B2 (en) | 2016-02-26 | 2020-03-17 | Hanon Systems | Rolled fin spiral EGR cooler |
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Also Published As
Publication number | Publication date |
---|---|
FR2982662B1 (en) | 2014-01-03 |
DE102012022302A1 (en) | 2013-05-16 |
US20130118722A1 (en) | 2013-05-16 |
FR2982662A1 (en) | 2013-05-17 |
US9481055B2 (en) | 2016-11-01 |
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