US20100025026A1 - Fatigue-proof plate heat exchanger - Google Patents
Fatigue-proof plate heat exchanger Download PDFInfo
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- US20100025026A1 US20100025026A1 US12/503,520 US50352009A US2010025026A1 US 20100025026 A1 US20100025026 A1 US 20100025026A1 US 50352009 A US50352009 A US 50352009A US 2010025026 A1 US2010025026 A1 US 2010025026A1
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- heat exchanger
- passages
- plate heat
- ratio
- exchanger according
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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
- F28D9/0062—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 spaced plates with inserted elements
- F28D9/0068—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 spaced plates with inserted elements with means for changing flow direction of one heat exchange medium, e.g. using deflecting zones
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
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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
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0049—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for lubricants, e.g. oil coolers
Definitions
- the invention relates to a plate heat exchanger for indirect heat exchange between at least two liquid and/or gaseous media with an essentially parallelepiped-shaped base, means for feeding and removing the media (headers, supports), and a number of passages, arranged essentially like stacks, for indirect heat exchange between media that respectively flow into adjacent passages, whereby the passages are formed by partitions that are spaced some distance apart, whereby the partitions are spaced some distance apart by end strips, the passages have a corrugated profile (fins), which is in heat-conductive contact with the partitions at its wave peaks and wave troughs, and the stack is closed off by a cover plate.
- the invention is exemplified below as an oil or air cooler, but in principle, it can be used for any plate heat exchanger and therefore is not limited to the application that is described by way of example.
- Plate heat exchangers are known in numerous embodiments and are laid out between at least two liquid and/or gaseous media for indirect heat exchange.
- the media that are involved in the heat exchange in this case flow through physically separated passages in the heat exchanger, so that the heat exchange is carried out only indirectly.
- the indirect heat exchange in this case is carried out via the structures, which separate the respective passages from one another, the thus mentioned partitions.
- the partitions are arranged like stacks in a plate heat exchanger and are spaced some distance apart by end strips.
- the passages through which flow the media that are involved in each case in heat exchange are formed between the partitions.
- the partitions have an essentially rectangular shape, so when arranged in a stack, an approximately parallelepiped plate heat exchanger is produced.
- means for feeding and removing the respective media in the different passages are attached to the essentially parallelepiped structure.
- the passages have a corrugated profile, the thus mentioned fins.
- a corrugated profile is introduced, and said profile is in heat-conductive contact with the partitions at the respective reversal points of the corrugated structure, the wave peaks and wave troughs.
- the corrugated profile is perpendicular to the flow direction of the medium that flows through the passage. The heat exchange between two media that flow through adjacent passages is thus improved by the heat-conductive contact of the corrugated profile at the reversal points with the partitions.
- the means for feeding and removing are designed in such a way that in each case oil flows alternately with air as a coolant through adjacent passages. If the coolers are used in compressors, the plate heat exchangers are often exposed to pressure and temperature changes. Such pressure or temperature changes are accompanied by high mechanical stresses and loads, which results in a high material requirement and quick material fatigue.
- An object of this invention is therefore to provide plate heat exchangers of the above-mentioned type having an improved stability and fatigue strength.
- a heretofore undisclosed result-effective variable provides that the ratio between the width of the partition and the repetition interval of the same characteristic of the corrugated profile as, for example, the repetition interval of two wave peaks (wavelength) or midpoints or minima has a value in the range of between 15 and 80. The ratio has not been addressed prior to the present invention.
- a concept of the invention is to increase stability by the suitable adaptation of the geometric parameters of the plate heat exchanger to one another.
- the plate heat exchanger can be designed more solidly to increase its stability, but rather the ratio between the wavelength and width of the partition is optimized.
- the division of how many corrugated structures (fins) are located on a partition of a given width is selected by setting the ratio of width of the partition to wavelength in such a way that the optimum stability and fatigue strength of the plate heat exchanger are achieved.
- the ratio between the width of the partition and the wavelength has a value in the range of between 20 and 60, preferably 28 and 50, and especially preferably 29 and 43.
- the ratio between the width and thickness of the partition is less than 150.
- the ratio between the width and thickness of the partition has a value in the range of between 50 and 150, preferably 75 and 115, and especially preferably between 80 and 105.
- the ratio of the height difference between the highest point of a wave peak and the lowest point of a wave trough (fin height) to the material thickness of the corrugated profile (fin thickness) is in the range of between 7 and 80 in passages through which oil flows as a medium.
- the ratio between fin height and fin thickness is in the range of between 8 and 20, preferably 10 and 15, in passages through which oil flows as a medium.
- the end strip in such a way that the end strip has a bottom side and three blades that are perpendicular to it, whereby the three blades are oriented in such a way that they face the interior of the parallelepiped-shaped base, and the middle of the three blades is longer than the outer two blades.
- such an end strip according to the invention can have both several openings or recesses, through which the respective medium/media is/are conveyed into the passages. All intervals between two partitions on the two shorter sides of the partition are preferably closed off by such an end strip in each case.
- the plate heat exchanger according to the invention is used as an oil or air cooler, whereby in particular hot oil is cooled in heat exchange with air.
- the plate heat exchanger is exposed to especially high mechanical loads by the application-induced frequent fluctuation of temperature and/or pressure of the oil that is to be cooled.
- the high mechanical stability and fatigue strength achieved according to the invention are especially advantageously produced in such a use.
- FIG. 1 shows a diagrammatic, perspective visualization of an embodiment of the plate heat exchanger according to the invention
- FIG. 2 shows the same visualization as FIG. 1 without fittings
- FIG. 3 a shows a diagrammatic, perspective visualization of a passage of the plate heat exchanger from FIGS. 1 and 2
- FIG. 3 b shows a section from the cross-section of a passage according to FIG. 3 a
- FIG. 4 shows a diagrammatic, perspective visualization of an exploded view of a second embodiment of the plate heat exchanger according to the invention
- FIG. 5 shows the profile of end bar 4 a or 4 b.
- FIG. 1 shows a plate heat exchanger from the outside.
- the plate heat exchanger has a central cuboid 8 with a length L of 1.1 m and a width B or height H of respectively 11 cm.
- On the top on the cuboid 8 on its sides and below the latter, mounted semicylindrical boxes 6 and 6 a (headers) are visible. Such mounted boxes are also located below the cuboid 8 and on the side that faces away from the side depicted. The latter are partially covered, however.
- fluids here air and oil, can be fed to the plate heat exchanger or can be removed again from the latter.
- the headers 6 and 6 a are used for distribution of the media that are introduced by the supports 7 or for collecting and for concentrating the media that are to be removed from the plate heat exchanger and have a (wall) thickness of 8 mm (header 6 ) or 6 mm (header 6 a ).
- the plate heat exchanger that is shown in FIG. 1 is designed for more than two fluid streams to bypass one another in separate passages for heat exchange.
- a portion of the streams can be directed past one another in opposite directions, while another portion can be directed crosswise.
- the simple situation is considered where an air stream and an oil stream flow crosswise to one another in separate, alternating passages. Larger numbers of fluid streams do not bring up any additional qualitative aspects within the scope of the invention.
- FIG. 2 it can be seen how the plate heat exchanger from FIG. 1 is built up in the interior.
- the cuboid 8 is built from partitions 1 and corrugated profiles 2 (fins) or distributor profiles 3 . Layers that have partitions 1 and profiles 2 or 3 alternate.
- An intermediate space between partitions 1 which is designed for a fluid to flow through it and which has profiles 2 and 3 here, is named passage 14 (such a passage is shown in FIGS. 3 a and 3 b and is described below.)
- the cuboid 8 has alternating passages 14 and partitions 1 that are parallel to the directions of flow. Both the partition and the passages 14 , i.e., the profiles 2 and 3 , are made from aluminum.
- the partitions 1 have a thickness of 1.1 mm.
- the passages 14 are closed off by aluminum end beams 4 a, so that a side wall is formed by the stack design with the partitions 1 .
- the end beams 4 a have a width of 10 mm along the partition 1 .
- the stacked partitions 1 of the cuboid 8 are closed off by aluminum cover plates 5 with a thickness of 6 mm that are parallel to the partitions 1 .
- the passages 14 are closed off by aluminum end strips 4 b with a thickness of 5.5 mm along the partition.
- the cuboid 8 has been produced by applying solder on the surfaces of the partition 1 and then alternately stacking the partitions 1 and the passages 14 one on top of the other.
- the cover plates 5 cover the stack 8 upward or downward. Then, the stack 8 has been soldered by heating in a furnace that comprises the stack 8 .
- the distributor profiles 3 On the sides of the plate heat exchanger, the distributor profiles 3 have distributor profile accesses 9 (cf. also FIG. 2 , recesses in the end beams 4 a and end strips 4 b ). By the latter, the fluids can be introduced from outside or also removed again in the related passages 14 via the headers 6 and 6 a and supports 7 .
- the distributor profile accesses 9 that are shown in FIG. 2 are covered in FIG. 1 by the headers 6 and 6 a.
- FIG. 3 a shows one of the passages 14 of the plate heat exchanger that is shown in FIGS. 1 and 2 .
- the flow direction of the fluid is identified by arrows.
- the fluid flows in on one distributor profile access 9 to be distributed in the related distributor profile 3 to the entire width of the passage 14 .
- the fluid flows through the corrugated heat exchange profile 2 and is concentrated on the outlet-side distributor profile access 9 after the heat exchange from the other distributor profile 3 is completed.
- the passage 14 is limited by the end beams 4 a and the end strips 4 b.
- FIG. 3 b shows a cutaway from a cross-section through the corrugated heat exchange profile 2 in FIG. 3 a.
- the profile 2 has a height HP of 4 mm and a profile thickness SP of 0.8 mm.
- the corrugated plot of the profile 2 is repeated within a wavelength LP of 1.6 mm.
- the ratio of partition width B to wavelength LP according to the invention is thus 69.
- FIG. 4 four passages of an air-oil-plate heat exchanger is shown in an exploded view without fittings.
- a cuboid 30 that consists of partitions 22 and profiles 23 or 25 is closed off upward by a cover plate 21 .
- the upmost-lying passage 27 is designed for air flowing through it; the passage 28 that is found thereunder is designed for oil flowing through it. Again, a passage that is designed for air, etc., flowing through it follows thereunder. In this plate heat exchanger, the air is conveyed crosswise to the longitudinal direction, and the oil along the longitudinal direction of the cuboid 30 .
- the end strips 24 of the air-carrying passages 27 have a profile in the shape of a large “E,” whereby the dovetails of the large “E” point into the interior of the plate heat exchanger. These front end strips 24 have a thickness of 5.5 mm along the partition 22 .
- the oil-carrying passages 28 are closed off by lateral end beams 26 , which have a width of 12 mm along the partition 22 .
- the profiles 23 in the air-carrying passages 27 are designed differently than the profiles 25 in the oil-carrying passages 28 . In the air-carrying passages 27 , the profiles 23 have a height of 6 mm, the structures are repeated with a wavelength of 3.5 mm, and the profile has a thickness of 0.8 mm.
- the profile height is 3.5 mm, and the structures are repeated with a wavelength of 1.5 mm.
- the profile thickness is also 0.8 mm in the oil-carrying passages 28 .
- the profile height is 5 mm with a profile thickness of 0.5 mm in the oil-carrying passages.
- the profile of the end bar is shown along line AA.
- the opening of the E-type profile is directed to the fins of the passage 2 and therefore to the inner part of the heat exchanger.
- Above and below the E-type lamella would be a parting sheet.
- the middle lamella is a little longer than the other ones.
- the plate heat exchangers that are described based on the preceding drawings are operated such that the fluid pressure and the temperature in the plate heat exchangers do not exceed 80 bar and 70° C. Also, in these plate heat exchangers, the fluid is fed so that pressure fluctuations remain below 50% of the design pressure, and the volume flow is 10 l/m inute in each passage during the heat exchange. Even if no heat exchange is carried out between oil and air, oil with a reduced volume flow of 0.5 l/minute also flows through the plate heat exchanger. This happens so that the plate heat exchanger remains at an elevated temperature.
- the properties of the plate heat exchanger from FIGS. 1 and 2 are adopted to a large extent.
- the lowermost two partitions and the uppermost two partitions have a thickness of 1.1 mm.
- the inside partitions have only a thickness of 0.8 mm.
- only the uppermost and the lowermost profiles have the values indicated in FIG. 3 b.
- Profiles in the interior have a greater height, a smaller profile thickness and a greater wavelength of the profile structure.
- the profile height 5 is 5 mm with a profile thickness of 0.5 mm in the oil-carrying passages.
- the wavelength LP is 2.5 mm with a partition width B of 11 cm.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Plate heat exchanger for indirect heat exchange between at least two liquid and/or gaseous media with an essentially parallelepiped-shaped base (8), means for feeding and removing the media (headers 6, 6 a, 7), and a number of passages (14), arranged essentially like stacks, for indirect heat exchange between media that respectively flow into adjacent passages (14), whereby the passages are formed by partitions (1, 22) that are spaced some distance apart, whereby the partitions are spaced some distance apart by end strips (4a, 4b), the passages have a corrugated profile (fins, 2), which is in heat-conductive contact with the partitions (1, 22) at its wave peaks and wave troughs, and the stack is closed off by a cover plate (5, 21), characterized in that the ratio between the width of the partition (B) and the repetition interval of the same characteristic of the corrugated profile as, for example, the repetition interval of two wave peaks (wavelength, LP) has a value in the range of between 15 and 80.
Description
- The invention relates to a plate heat exchanger for indirect heat exchange between at least two liquid and/or gaseous media with an essentially parallelepiped-shaped base, means for feeding and removing the media (headers, supports), and a number of passages, arranged essentially like stacks, for indirect heat exchange between media that respectively flow into adjacent passages, whereby the passages are formed by partitions that are spaced some distance apart, whereby the partitions are spaced some distance apart by end strips, the passages have a corrugated profile (fins), which is in heat-conductive contact with the partitions at its wave peaks and wave troughs, and the stack is closed off by a cover plate. The invention is exemplified below as an oil or air cooler, but in principle, it can be used for any plate heat exchanger and therefore is not limited to the application that is described by way of example.
- Plate heat exchangers are known in numerous embodiments and are laid out between at least two liquid and/or gaseous media for indirect heat exchange. The media that are involved in the heat exchange in this case flow through physically separated passages in the heat exchanger, so that the heat exchange is carried out only indirectly. The indirect heat exchange in this case is carried out via the structures, which separate the respective passages from one another, the thus mentioned partitions.
- The partitions are arranged like stacks in a plate heat exchanger and are spaced some distance apart by end strips. The passages through which flow the media that are involved in each case in heat exchange are formed between the partitions. In general, the partitions have an essentially rectangular shape, so when arranged in a stack, an approximately parallelepiped plate heat exchanger is produced. According to the prior art, means for feeding and removing the respective media in the different passages are attached to the essentially parallelepiped structure.
- According to the prior art, the passages have a corrugated profile, the thus mentioned fins. In the passages that are formed between the partitions, a corrugated profile is introduced, and said profile is in heat-conductive contact with the partitions at the respective reversal points of the corrugated structure, the wave peaks and wave troughs. In this case, the corrugated profile is perpendicular to the flow direction of the medium that flows through the passage. The heat exchange between two media that flow through adjacent passages is thus improved by the heat-conductive contact of the corrugated profile at the reversal points with the partitions.
- In one application of such a plate heat exchanger according to the prior art as an oil or air cooler, the means for feeding and removing are designed in such a way that in each case oil flows alternately with air as a coolant through adjacent passages. If the coolers are used in compressors, the plate heat exchangers are often exposed to pressure and temperature changes. Such pressure or temperature changes are accompanied by high mechanical stresses and loads, which results in a high material requirement and quick material fatigue.
- An object of this invention is therefore to provide plate heat exchangers of the above-mentioned type having an improved stability and fatigue strength.
- Upon further study of the specification and appended claims, other objects and advantages of the invention will become apparent.
- To achieve these objects, at least one new geometric ratio has been discovered which can lead to the improved fatigue strength and stability.
- More specifically, a heretofore undisclosed result-effective variable provides that the ratio between the width of the partition and the repetition interval of the same characteristic of the corrugated profile as, for example, the repetition interval of two wave peaks (wavelength) or midpoints or minima has a value in the range of between 15 and 80. The ratio has not been addressed prior to the present invention.
- Simulations of a plate heat exchanger, which is used as an oil cooler, show an improvement in the fatigue strength in the statistical mean by a factor of 10 in the embodiment according to the invention before fatigue rupture occurs.
- Thus a concept of the invention is to increase stability by the suitable adaptation of the geometric parameters of the plate heat exchanger to one another. According to the invention, not merely parts of the plate heat exchanger can be designed more solidly to increase its stability, but rather the ratio between the wavelength and width of the partition is optimized. According to the invention, the division of how many corrugated structures (fins) are located on a partition of a given width is selected by setting the ratio of width of the partition to wavelength in such a way that the optimum stability and fatigue strength of the plate heat exchanger are achieved.
- According to an advantageous configuration of the invention, the ratio between the width of the partition and the wavelength has a value in the range of between 20 and 60, preferably 28 and 50, and especially preferably 29 and 43.
- Suitably, the ratio between the width and thickness of the partition is less than 150. In an advantageous configuration of the invention, the ratio between the width and thickness of the partition has a value in the range of between 50 and 150, preferably 75 and 115, and especially preferably between 80 and 105. By the additional optimization of partition width to partition thickness, another improvement in stability and fatigue strength is achieved.
- Advantageously, the ratio of the height difference between the highest point of a wave peak and the lowest point of a wave trough (fin height) to the material thickness of the corrugated profile (fin thickness) is in the range of between 7 and 80 in passages through which oil flows as a medium. In one configuration of the invention, the ratio between fin height and fin thickness is in the range of between 8 and 20, preferably 10 and 15, in passages through which oil flows as a medium. Within the scope of the invention, it has proven advantageous to design the fins, in passages of the heat exchanger through which the hot oil that is to be cooled is conveyed, in such a way that the ratio between fin height and fin thickness is always between a value of 7 and 80.
- It is also advantageous to design the end strip in such a way that the end strip has a bottom side and three blades that are perpendicular to it, whereby the three blades are oriented in such a way that they face the interior of the parallelepiped-shaped base, and the middle of the three blades is longer than the outer two blades. In this case, such an end strip according to the invention can have both several openings or recesses, through which the respective medium/media is/are conveyed into the passages. All intervals between two partitions on the two shorter sides of the partition are preferably closed off by such an end strip in each case. By the design with the three perpendicular blades on the bottom side, the mass of the end strip can be reduced, without in this case forfeiting mechanical stability. In an application as an oil cooler, the two longer sides are advantageously designed without end strips, and thus ambient air can flow through them as a coolant.
- In an especially preferred configuration of the invention, the plate heat exchanger according to the invention is used as an oil or air cooler, whereby in particular hot oil is cooled in heat exchange with air. In such a use, the plate heat exchanger is exposed to especially high mechanical loads by the application-induced frequent fluctuation of temperature and/or pressure of the oil that is to be cooled. The high mechanical stability and fatigue strength achieved according to the invention are especially advantageously produced in such a use.
- With this invention, it is possible to configure in particular a plate heat exchanger of the initially mentioned type in such a way that the mechanical stability and the fatigue strength of the plate heat exchanger, in particular with use under permanent fluctuation of the pressure and temperature conditions, can be considerably increased compared to the prior art.
- Various other features and attendant advantages of the present invention will be more fully appreciated as the same becomes better understood when considered in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the several views, and wherein:
-
FIG. 1 shows a diagrammatic, perspective visualization of an embodiment of the plate heat exchanger according to the invention -
FIG. 2 shows the same visualization asFIG. 1 without fittings -
FIG. 3 a shows a diagrammatic, perspective visualization of a passage of the plate heat exchanger fromFIGS. 1 and 2 -
FIG. 3 b shows a section from the cross-section of a passage according toFIG. 3 a -
FIG. 4 shows a diagrammatic, perspective visualization of an exploded view of a second embodiment of the plate heat exchanger according to the invention -
FIG. 5 shows the profile ofend bar 4 a or 4 b. -
FIG. 1 shows a plate heat exchanger from the outside. The plate heat exchanger has a central cuboid 8 with a length L of 1.1 m and a width B or height H of respectively 11 cm. On the top on the cuboid 8, on its sides and below the latter, mountedsemicylindrical boxes 6 and 6 a (headers) are visible. Such mounted boxes are also located below the cuboid 8 and on the side that faces away from the side depicted. The latter are partially covered, however. By supports 7, fluids, here air and oil, can be fed to the plate heat exchanger or can be removed again from the latter. Theheaders 6 and 6 a are used for distribution of the media that are introduced by the supports 7 or for collecting and for concentrating the media that are to be removed from the plate heat exchanger and have a (wall) thickness of 8 mm (header 6) or 6 mm (header 6 a). - The plate heat exchanger that is shown in
FIG. 1 is designed for more than two fluid streams to bypass one another in separate passages for heat exchange. A portion of the streams can be directed past one another in opposite directions, while another portion can be directed crosswise. To explain the invention, the simple situation is considered where an air stream and an oil stream flow crosswise to one another in separate, alternating passages. Larger numbers of fluid streams do not bring up any additional qualitative aspects within the scope of the invention. - In
FIG. 2 , it can be seen how the plate heat exchanger fromFIG. 1 is built up in the interior. Essentially, the cuboid 8 is built from partitions 1 and corrugated profiles 2 (fins) ordistributor profiles 3. Layers that have partitions 1 andprofiles profiles FIGS. 3 a and 3 b and is described below.) - The cuboid 8 has alternating passages 14 and partitions 1 that are parallel to the directions of flow. Both the partition and the passages 14, i.e., the
profiles aluminum end beams 4 a, so that a side wall is formed by the stack design with the partitions 1. The end beams 4 a have a width of 10 mm along the partition 1. The stacked partitions 1 of the cuboid 8 are closed off by aluminum cover plates 5 with a thickness of 6 mm that are parallel to the partitions 1. At their fronts, the passages 14 are closed off by aluminum end strips 4 b with a thickness of 5.5 mm along the partition. - The cuboid 8 has been produced by applying solder on the surfaces of the partition 1 and then alternately stacking the partitions 1 and the passages 14 one on top of the other. The cover plates 5 cover the stack 8 upward or downward. Then, the stack 8 has been soldered by heating in a furnace that comprises the stack 8.
- On the sides of the plate heat exchanger, the distributor profiles 3 have distributor profile accesses 9 (cf. also
FIG. 2 , recesses in the end beams 4 a and end strips 4 b). By the latter, the fluids can be introduced from outside or also removed again in the related passages 14 via theheaders 6 and 6 a and supports 7. The distributor profile accesses 9 that are shown inFIG. 2 are covered inFIG. 1 by theheaders 6 and 6 a. -
FIG. 3 a shows one of the passages 14 of the plate heat exchanger that is shown inFIGS. 1 and 2 . The flow direction of the fluid is identified by arrows. The fluid flows in on onedistributor profile access 9 to be distributed in therelated distributor profile 3 to the entire width of the passage 14. Then, the fluid flows through the corrugatedheat exchange profile 2 and is concentrated on the outlet-sidedistributor profile access 9 after the heat exchange from theother distributor profile 3 is completed. On their lateral sides and fronts, the passage 14 is limited by the end beams 4 a and the end strips 4 b. -
FIG. 3 b shows a cutaway from a cross-section through the corrugatedheat exchange profile 2 inFIG. 3 a. Theprofile 2 has a height HP of 4 mm and a profile thickness SP of 0.8 mm. The corrugated plot of theprofile 2 is repeated within a wavelength LP of 1.6 mm. The ratio of partition width B to wavelength LP according to the invention is thus 69. - In
FIG. 4 , four passages of an air-oil-plate heat exchanger is shown in an exploded view without fittings. - A cuboid 30 that consists of
partitions 22 andprofiles 23 or 25 is closed off upward by a cover plate 21. Regarding the dimensions of the cuboid 30 and the cover plate 21 andpartition 22 or for their materials, what is stated inFIGS. 1 and 2 applies here accordingly. The upmost-lyingpassage 27 is designed for air flowing through it; the passage 28 that is found thereunder is designed for oil flowing through it. Again, a passage that is designed for air, etc., flowing through it follows thereunder. In this plate heat exchanger, the air is conveyed crosswise to the longitudinal direction, and the oil along the longitudinal direction of the cuboid 30. The end strips 24 of the air-carryingpassages 27 have a profile in the shape of a large “E,” whereby the dovetails of the large “E” point into the interior of the plate heat exchanger. These front end strips 24 have a thickness of 5.5 mm along thepartition 22. The oil-carrying passages 28 are closed off by lateral end beams 26, which have a width of 12 mm along thepartition 22. Theprofiles 23 in the air-carryingpassages 27 are designed differently than the profiles 25 in the oil-carrying passages 28. In the air-carryingpassages 27, theprofiles 23 have a height of 6 mm, the structures are repeated with a wavelength of 3.5 mm, and the profile has a thickness of 0.8 mm. In the oil-carrying passages 28, the profile height is 3.5 mm, and the structures are repeated with a wavelength of 1.5 mm. The profile thickness is also 0.8 mm in the oil-carrying passages 28. In another configuration of the invention, the profile height is 5 mm with a profile thickness of 0.5 mm in the oil-carrying passages. - In
FIG. 5 , the profile of the end bar is shown along line AA. InFIG. 3 a, the opening of the E-type profile is directed to the fins of thepassage 2 and therefore to the inner part of the heat exchanger. Above and below the E-type lamella would be a parting sheet. The middle lamella is a little longer than the other ones. - The plate heat exchangers that are described based on the preceding drawings are operated such that the fluid pressure and the temperature in the plate heat exchangers do not exceed 80 bar and 70° C. Also, in these plate heat exchangers, the fluid is fed so that pressure fluctuations remain below 50% of the design pressure, and the volume flow is 10 l/m inute in each passage during the heat exchange. Even if no heat exchange is carried out between oil and air, oil with a reduced volume flow of 0.5 l/minute also flows through the plate heat exchanger. This happens so that the plate heat exchanger remains at an elevated temperature. For a third embodiment (not shown), the properties of the plate heat exchanger from
FIGS. 1 and 2 are adopted to a large extent. Unlike the first embodiment, only the lowermost two partitions and the uppermost two partitions have a thickness of 1.1 mm. The inside partitions have only a thickness of 0.8 mm. In addition, only the uppermost and the lowermost profiles have the values indicated inFIG. 3 b. Profiles in the interior have a greater height, a smaller profile thickness and a greater wavelength of the profile structure. In this configuration of the invention, the profile height 5 is 5 mm with a profile thickness of 0.5 mm in the oil-carrying passages. In this configuration, the wavelength LP is 2.5 mm with a partition width B of 11 cm. - To facilitate an understanding of the figures, the following list will be helpful:
-
- 1 Partition
- 2 Heat Exchange Profile
- 3 Distributor Profile
- 4 a End Beam
- 4 b End Strip
- 5 Cover Plate
- 6, 6 a Boxes
- 7 Support
- 8 Cuboid
- 9 Distributor Profile Access
- 14 Passage
- 21 Cover Plate
- 22 Partition
- 23, 25 Profiles
- 24 End Strip
- 26 End Beam
- 27 Air-Carrying Passage
- 28 Oil-Carrying Passage
- 30 Cuboid
- SP Profile Thickness
- LP Wavelength
- HP Passage Height
- B Cuboid Width
- H Cuboid Height
- L Cuboid Length
- Without further elaboration, it is believed that one skilled in the art can, using the preceding description, utilize the present invention to its fullest extent. The preceding preferred specific embodiments are, therefore, to be construed as merely illustrative, and not limitative of the remainder of the disclosure in any way whatsoever.
- The entire disclosures of all applications, patents and publications, cited herein and of corresponding German application No. 10200803302.6, filed Jul. 15, 2008 are incorporated by reference herein.
- The preceding examples can be repeated with similar success by substituting the generically or specifically described reactants and/or operating conditions of this invention for those used in the preceding examples.
- From the foregoing description, one skilled in the art can easily ascertain the essential characteristics of this invention and, without departing from the spirit and scope thereof, can make various changes and modifications of the invention to adapt it to various usages and conditions.
Claims (16)
1. In a plate heat exchanger for indirect heat exchange between at least two liquid and/or gaseous media with an essentially parallelepiped-shaped base (8), means for feeding and removing the media (headers 6, 6 a, 7), and a number of passages (14), arranged essentially like stacks, for indirect heat exchange between media that respectively flow into adjacent passages (14), whereby the passages are formed by partitions (1, 22) that are spaced some distance apart, whereby the partitions are spaced some distance apart by end strips (4 a, 4 b), the passages have a corrugated profile (fins, 2), which is in heat-conductive contact with the partitions (1, 22) at its wave peaks and wave troughs, and the stack is closed off by a cover plate (5, 21), the improvement wherein the ratio between the width of the partition (B) and the repetition interval of the same characteristic of the corrugated profile (2) as, for example, the repetition interval of two wave peaks (wavelength, LP) has a value in the range of between 15 and 80.
2. A plate heat exchanger according to claim 1 , wherein the ratio between the width of the partition (B) and wavelength (LP) has a value in the range of between 20 and 60.
3. A plate heat exchanger according to claim 1 , wherein the ratio between the width (B) and the thickness of the partition is less than 150.
4. A plate heat exchanger according to claim 3 , wherein the ratio between the width (B) and the thickness of the partition has a value in the range of between 50 and 150.
5. A plate heat exchanger according to claim 1 , wherein the ratio of height difference (HP) between the highest point of a wave peak and the lowest point of a wave trough (fin height) to the material thickness (fin thickness, SP) of the corrugated profile (2), in passages (14) through which oil may flow as a medium, has a value in the range of between 7 and 80.
6. A plate heat exchanger according to claim 1 , wherein the ratio between fin height (HP) and fin thickness (SP), in passages (14) through which oil flows as a medium, has a value in the range of between 8 and 20.
7. A plate heat exchanger for indirect heat exchange between at least two liquid and/or gaseous media with an essentially parallelepiped-shaped base (8), means for feeding and removing the media (headers 6, 6 a, 7), and a number of passages (14), arranged essentially like stacks, for indirect heat exchange between media that respectively flow into adjacent passages, whereby the passages (14) are formed by partitions (1, 22) that are spaced some distance apart, whereby the partitions (1, 22) are spaced some distance apart by end strips (4 a, 4 b), and the stack is closed off by a cover plate (5, 21), wherein the end strip (4 a, 4 b) has a bottom side and three blades that are perpendicular to it, whereby the three blades are oriented in such a way that they face the interior of the parallelepiped-shaped base, and the middle of the three blades is longer than the outer two blades.
8. A method of cooling oil or air, comprising providing a heat exchanger according to claim 1 and passing oil or air there through in indirect heat exchange with a heat exchange medium.
9. A plate heat exchanger according to claim 2 , wherein said ratio is between 28 and 50.
10. A plate heat exchanger according to claim 2 , wherein said ratio is between 29 and 43.
11. A plate heat exchanger according to claim 4 , wherein said ratio is between 75 and 115.
12. A plate heat exchanger according to claim 4 , wherein said ratio is between 80 and 105.
13. A plate heat exchanger according to claim 6 , wherein said range is between 10 and 15.
14. A plate heat exchanger according to claim 1 , wherein the ratio of the height difference between the highest point of a wave peak and the lowest point of a wave trough (fin height) to the material thickness of the corrugated profile (fin thickness) is in the range of between 7 and 80 in passages through which oil flows as a medium.
15. A plate heat exchanger according to claim 14 , wherein, the ratio between fin height and fin thickness is in the range of between 8 and 20, through which oil flows as a medium.
16. A plate heat exchanger according to claim 14 , wherein, the ratio between fin height and fin thickness is in the range of between 10 and 15, in passages through which oil flows as a medium.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008033302.6 | 2008-07-15 | ||
DE102008033302A DE102008033302A1 (en) | 2008-07-15 | 2008-07-15 | Fatigue resistant plate heat exchanger |
Publications (1)
Publication Number | Publication Date |
---|---|
US20100025026A1 true US20100025026A1 (en) | 2010-02-04 |
Family
ID=41427152
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/503,520 Abandoned US20100025026A1 (en) | 2008-07-15 | 2009-07-15 | Fatigue-proof plate heat exchanger |
Country Status (3)
Country | Link |
---|---|
US (1) | US20100025026A1 (en) |
CN (1) | CN101629792A (en) |
DE (1) | DE102008033302A1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140352933A1 (en) * | 2013-05-28 | 2014-12-04 | Hamilton Sundstrand Corporation | Core assembly for a heat exchanger and method of assembling |
US20160245591A1 (en) * | 2013-10-14 | 2016-08-25 | Airec Ab | Plate for heat exchanger and heat exchanger |
US20170089643A1 (en) * | 2015-09-25 | 2017-03-30 | Westinghouse Electric Company, Llc. | Heat Exchanger |
US9804607B1 (en) * | 2011-11-16 | 2017-10-31 | Zane Coleman | Fluid transfer systems, devices, components, and methods of manufacture |
US20180292143A1 (en) * | 2015-10-06 | 2018-10-11 | Linde Aktiengesellschaft | Edge strips with surface structure for plate heat exchanger |
US10724802B2 (en) | 2015-10-02 | 2020-07-28 | Alfa Laval Corporate Ab | Heat transfer plate and plate heat exchanger |
US10907500B2 (en) | 2015-02-06 | 2021-02-02 | Raytheon Technologies Corporation | Heat exchanger system with spatially varied additively manufactured heat transfer surfaces |
US20220011052A1 (en) * | 2018-11-26 | 2022-01-13 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Method for manufacturing a heat exchanger comprising a zone to be supported and heat exchanger manufactured using such a method |
EP4343252A1 (en) * | 2022-09-20 | 2024-03-27 | Alfa Laval Corporate AB | A plate heat exchanger |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103759474B (en) * | 2014-01-28 | 2018-01-02 | 丹佛斯微通道换热器(嘉兴)有限公司 | Plate type heat exchanger |
FR3069918B1 (en) * | 2017-08-04 | 2020-01-17 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | HEAT EXCHANGER COMPRISING A MULTI-CHANNEL DISTRIBUTION ELEMENT |
DE102018003479A1 (en) * | 2018-04-27 | 2019-10-31 | Linde Aktiengesellschaft | Plate heat exchanger, process plant and process |
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US3847211A (en) * | 1969-01-28 | 1974-11-12 | Sub Marine Syst Inc | Property interchange system for fluids |
US4623019A (en) * | 1985-09-30 | 1986-11-18 | United Aircraft Products, Inc. | Heat exchanger with heat transfer control |
US5054545A (en) * | 1990-12-04 | 1991-10-08 | Northern Telecom Limited | Heat exchanger for a sealed cabinet |
US6347662B1 (en) * | 1999-02-01 | 2002-02-19 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Heat exchanger, in particular plate heat exchanger for an air separation unit |
-
2008
- 2008-07-15 DE DE102008033302A patent/DE102008033302A1/en not_active Withdrawn
-
2009
- 2009-07-15 CN CN200910151674A patent/CN101629792A/en active Pending
- 2009-07-15 US US12/503,520 patent/US20100025026A1/en not_active Abandoned
Patent Citations (4)
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US3847211A (en) * | 1969-01-28 | 1974-11-12 | Sub Marine Syst Inc | Property interchange system for fluids |
US4623019A (en) * | 1985-09-30 | 1986-11-18 | United Aircraft Products, Inc. | Heat exchanger with heat transfer control |
US5054545A (en) * | 1990-12-04 | 1991-10-08 | Northern Telecom Limited | Heat exchanger for a sealed cabinet |
US6347662B1 (en) * | 1999-02-01 | 2002-02-19 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Heat exchanger, in particular plate heat exchanger for an air separation unit |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9804607B1 (en) * | 2011-11-16 | 2017-10-31 | Zane Coleman | Fluid transfer systems, devices, components, and methods of manufacture |
US20140352933A1 (en) * | 2013-05-28 | 2014-12-04 | Hamilton Sundstrand Corporation | Core assembly for a heat exchanger and method of assembling |
US20160245591A1 (en) * | 2013-10-14 | 2016-08-25 | Airec Ab | Plate for heat exchanger and heat exchanger |
US10371454B2 (en) * | 2013-10-14 | 2019-08-06 | Alfa Laval Corporate Ab | Plate for heat exchanger and heat exchanger |
US10907500B2 (en) | 2015-02-06 | 2021-02-02 | Raytheon Technologies Corporation | Heat exchanger system with spatially varied additively manufactured heat transfer surfaces |
US20170089643A1 (en) * | 2015-09-25 | 2017-03-30 | Westinghouse Electric Company, Llc. | Heat Exchanger |
US10724802B2 (en) | 2015-10-02 | 2020-07-28 | Alfa Laval Corporate Ab | Heat transfer plate and plate heat exchanger |
US20180292143A1 (en) * | 2015-10-06 | 2018-10-11 | Linde Aktiengesellschaft | Edge strips with surface structure for plate heat exchanger |
US20220011052A1 (en) * | 2018-11-26 | 2022-01-13 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Method for manufacturing a heat exchanger comprising a zone to be supported and heat exchanger manufactured using such a method |
EP4343252A1 (en) * | 2022-09-20 | 2024-03-27 | Alfa Laval Corporate AB | A plate heat exchanger |
WO2024061817A1 (en) * | 2022-09-20 | 2024-03-28 | Alfa Laval Corporate Ab | A plate heat exchanger |
Also Published As
Publication number | Publication date |
---|---|
DE102008033302A1 (en) | 2010-01-21 |
CN101629792A (en) | 2010-01-20 |
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