CN113670098A - Metal foam base printed circuit board type flue gas heat exchanger - Google Patents
Metal foam base printed circuit board type flue gas heat exchanger Download PDFInfo
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- CN113670098A CN113670098A CN202111015456.1A CN202111015456A CN113670098A CN 113670098 A CN113670098 A CN 113670098A CN 202111015456 A CN202111015456 A CN 202111015456A CN 113670098 A CN113670098 A CN 113670098A
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- heat exchanger
- metal foam
- fluid channel
- circuit board
- printed circuit
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- 239000006262 metallic foam Substances 0.000 title claims abstract description 62
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 239000003546 flue gas Substances 0.000 title claims abstract description 36
- 239000012530 fluid Substances 0.000 claims abstract description 112
- 239000000463 material Substances 0.000 claims abstract description 29
- 239000000758 substrate Substances 0.000 claims description 21
- 238000005452 bending Methods 0.000 claims description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- 239000004071 soot Substances 0.000 claims description 10
- 239000002585 base Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 239000003054 catalyst Substances 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 230000004913 activation Effects 0.000 claims description 6
- 230000001154 acute effect Effects 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 230000008929 regeneration Effects 0.000 claims description 6
- 238000011069 regeneration method Methods 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 4
- 238000009713 electroplating Methods 0.000 claims description 4
- 238000005187 foaming Methods 0.000 claims description 4
- 238000005245 sintering Methods 0.000 claims description 4
- 229910052783 alkali metal Inorganic materials 0.000 claims description 3
- 150000001340 alkali metals Chemical group 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 3
- 239000010970 precious metal Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 210000000497 foam cell Anatomy 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 13
- 239000002918 waste heat Substances 0.000 abstract description 12
- 238000002485 combustion reaction Methods 0.000 abstract description 8
- 230000010354 integration Effects 0.000 abstract description 4
- 230000035699 permeability Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 238000005192 partition Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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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
- F28D9/0037—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 conduits for the other heat-exchange medium also being formed by paired plates touching each other
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/082—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys
- F28F21/083—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys from stainless steel
-
- 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
- F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
- F28F3/048—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2260/00—Heat exchangers or heat exchange elements having special size, e.g. microstructures
- F28F2260/02—Heat exchangers or heat exchange elements having special size, e.g. microstructures having microchannels
Landscapes
- 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
The invention discloses a metal foam base printed circuit board type flue gas heat exchanger, which comprises a heat exchanger core body, wherein the heat exchanger core body is of a micron-sized printed circuit board type structure, the heat exchanger core body comprises a cold fluid channel and a hot fluid channel, the hot fluid channel adopts a zigzag flow channel made of metal foam materials, the cold fluid channel and the hot fluid channel are periodically arranged in a staggered combination manner in the stacking direction, and the range of the linear distance from a starting point to a terminal point of the hot fluid channel is between 2 and 40 mm; the invention has the advantages that: the heat exchange performance is further improved through the circulation of the metal foam, and due to the permeability of the metal foam, the pressure drop of the Z-shaped flow channel made of the metal foam material is greatly reduced, so that the heat exchange device can be applied to a vehicle-mounted waste heat recovery system, has very important significance for saving energy and reducing emission of an internal combustion engine and realizing the miniaturization and integration of the waste heat recovery system of the internal combustion engine.
Description
Technical Field
The invention relates to the technical field of heat energy, in particular to a metal foam base printed circuit board type smoke heat exchanger.
Background
The flue gas heat exchanger is a key component in a waste heat recovery and circulation system of the internal combustion engine and is responsible for absorbing heat from the flue gas of the internal combustion engine. The design of a proper flue gas heat exchanger can greatly improve the efficiency of the waste heat recovery system. The traditional heat exchanger and the traditional heat exchange strengthening means have the defect of low heat exchange efficiency, so that the flue gas heat exchanger is too large in size and weight, and difficult to apply to a vehicle-mounted waste heat recovery system under the conditions of large size and weight. In addition, the internal combustion engine is very sensitive to the loss of the pressure drop of the flue gas, and the flue gas heat exchanger needs to meet the requirement of small flow resistance so as to improve the heat exchange efficiency.
Chinese patent publication No. CN208620384U discloses a composite plate formula gas heater, including upper cover plate, lower apron, stand and heat exchanger fin, upper cover plate, lower apron and stand constitute the heat exchanger frame, the heat exchanger fin be provided with a plurality ofly and interval distribution set up in the heat exchanger frame to correspond between arbitrary two adjacent heat exchanger fins and be provided with the sealing strip, the sealing strip that sets up on arbitrary two adjacent heat exchanger fins is 90 dislocation set, forms hot fluid passage and cold fluid passage of a plurality of adjacent crisscross settings, all correspond in hot fluid passage and the cold fluid passage and be provided with the fluid of disturbing, the heat exchanger fin is polygonal composite plate. The utility model has the advantages of dew point corrosion resistance, long-period stable operation, recovery of sensible heat in low-temperature waste heat of flue gas, recovery of latent heat of vapor in the flue gas, obvious energy-saving effect, obvious emission reduction effect, high strength, good sealing property, prolonged service life of equipment and long-period operation; the pressure drop is small and the cleaning is easy. But this patent heat transfer intensification means has the shortcoming that heat exchange efficiency is low, leads to flue gas heat exchanger volume and weight too huge, only leans on the smooth surface of composite sheet coating to make fluid flow resistance little to reduce fluid pressure drop, the effect that reduces the pressure drop is not obvious, based on its bulky and the effect that reduces the pressure drop is not obvious leads to the not high problem of heat exchange efficiency, this patent is not applicable to on-vehicle waste heat recovery system.
Disclosure of Invention
The invention aims to solve the technical problems that the flue gas heat exchanger in the prior art is too large in size and weight, and the effect of reducing pressure drop is not obvious, so that the heat exchange efficiency is not high, and the flue gas heat exchanger is difficult to apply to a vehicle-mounted waste heat recovery system.
The invention solves the technical problems through the following technical means: the utility model provides a metal foam base printed circuit board formula flue gas heat exchanger, includes the heat exchanger core, the heat exchanger core is micron order printed circuit board formula structure, the heat exchanger core includes cold fluid passageway and hot-fluid passageway, the hot-fluid passageway adopts metal foam's zigzag runner, cold fluid passageway and hot-fluid passageway are alternately arranged in the range of the combination of piling up the orientation periodicity, the straight line distance scope of the starting point of hot-fluid passageway to the terminal point is between 2-40 mm.
The range of the linear distance from the starting point to the end point of the hot fluid channel is 2-40mm, the core body of the heat exchanger is of a micron-sized printed circuit board type structure, the cold fluid channel and the hot fluid channel are periodically arranged in a staggered combination manner in the stacking direction, the compactness of the heat exchanger is greatly improved, the miniaturization and the light weight are realized, the hot fluid channel adopts the Z-shaped channel made of the metal foam material, the fluid flowing direction can be changed, the turbulence degree is improved, meanwhile, part of fluid flows through the metal foam to further improve the heat exchange performance, and due to the permeability of the metal foam, the pressure drop of the Z-shaped channel made of the metal foam material is greatly reduced, so that the heat exchanger can be applied to a vehicle-mounted waste heat recovery system, the energy conservation and emission reduction are realized, and the miniaturization and the integration of the internal combustion engine are very important.
Furthermore, the heat exchanger core body is formed by high-temperature diffusion welding of at least one layer of hot fluid substrate and at least one layer of cold fluid substrate, the cold fluid substrates and the hot fluid substrates are periodically arranged in a staggered combination manner in the stacking direction, the cold fluid channels are arranged in the cold fluid substrates, and the hot fluid channels are arranged in the hot fluid substrates.
Furthermore, the hot fluid channel comprises a plurality of first separating strips, the first separating strips are made of metal foam materials, each first separating strip is a zigzag strip-shaped structure formed by connecting a plurality of continuous first z-shaped strips end to end, each first separating strip is arranged at equal intervals, a first channel is formed between every two adjacent first separating strips, the first channels are arranged in the hot fluid substrate, the inlet and the outlet of each first channel are respectively located on one opposite side of the heat exchanger core, and hot fluid flows in the first channels.
Furthermore, the cold fluid channel comprises a plurality of second separating strips, the second separating strips are of a metal solid structure, each second separating strip is a second Z-shaped strip formed by bending a straight metal strip vertically to the right and then bending the straight metal strip vertically to the lower, each second separating strip is arranged at equal intervals, a second channel is formed between every two adjacent second separating strips, the second channels are arranged in the cold fluid base plate, the inlets and the outlets of the second channels are respectively located on the other opposite sides of the heat exchanger core, and the cold fluid circulates in the second channels.
Further, the metal foam porosity is between 0.7 and 0.98 and the metal foam cell density is between 30PPI and 90 PPI.
Further, the metal foam is made of aluminum, copper, nickel or an alloy of aluminum, copper, nickel by a sintering method, an electroplating method, a pressure casting method or a foaming method.
Furthermore, the hydraulic diameter of the aperture of the hot fluid channel is 1mm-3mm, and the hydraulic diameter of the aperture of the cold fluid channel is 0.5mm-3 mm.
Furthermore, the bending angle of the Z-shaped flow channel of the metal foam material is an acute angle or an acute angle fillet, and the bending angle range is between 0 and 45 degrees.
Further, the heat exchanger core body is made of metal foam materials or stainless steel materials.
Further, the surface of a Z-shaped flow channel of the metal foam material in the heat exchanger core is coated with a soot activation regeneration catalyst, and the soot activation regeneration catalyst is alkali metal or precious metal.
The invention has the advantages that:
(1) the range of the linear distance from the starting point to the end point of the hot fluid channel is 2-40mm, the core body of the heat exchanger is of a micron-sized printed circuit board type structure, the cold fluid channel and the hot fluid channel are periodically arranged in a staggered combination manner in the stacking direction, the compactness of the heat exchanger is greatly improved, the miniaturization and the light weight are realized, the hot fluid channel adopts the Z-shaped channel made of the metal foam material, the fluid flowing direction can be changed, the turbulence degree is improved, meanwhile, part of fluid flows through the metal foam to further improve the heat exchange performance, and due to the permeability of the metal foam, the pressure drop of the Z-shaped channel made of the metal foam material is greatly reduced, so that the heat exchanger can be applied to a vehicle-mounted waste heat recovery system, the energy conservation and emission reduction are realized, and the miniaturization and the integration of the internal combustion engine are very important.
(2) The part of the fluid flows through the metal foam, so that the flow dead zone is obviously reduced, and the dirt and impurities at the dead corner of the flow are washed away.
(3) The hot fluid channel adopts the Z-shaped flow channel made of the metal foam material, so that the influence of the traditional Z-shaped flow channel on the change of the flow form can be reduced, and the pressure drop of the Z-shaped flow channel can be obviously reduced while the heat exchange is enhanced.
Drawings
Fig. 1 is a schematic structural diagram of a metal foam-based printed circuit board type flue gas heat exchanger disclosed in an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a hot fluid channel in a metal foam-based printed circuit board type flue gas heat exchanger according to an embodiment of the present invention in a top view direction;
fig. 3 is a schematic structural diagram of a cold fluid channel in a metal foam-based printed circuit board type flue gas heat exchanger in a top view direction according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the metal foam-based printed circuit board type flue gas heat exchanger comprises a heat exchanger core 5, wherein the heat exchanger core 5 is of a micron-sized printed circuit board type structure, the heat exchanger core 5 comprises a cold fluid channel 2 and a hot fluid channel 1, the hot fluid channel 1 adopts a zigzag flow channel made of metal foam materials, the cold fluid channel 2 and the hot fluid channel 1 are periodically arranged in a staggered combination manner in the stacking direction, and the range of the linear distance from the starting point to the end point of the hot fluid channel 1 is 2-40 mm.
The heat exchanger core body 5 is formed by high-temperature diffusion welding of at least one layer of hot fluid substrate 3 and at least one layer of cold fluid substrate 4, the cold fluid substrates 4 and the hot fluid substrates 3 are periodically arranged in a staggered combination manner in the stacking direction, the cold fluid channels 2 are arranged in the cold fluid substrate 4, and the hot fluid channels 1 are arranged in the hot fluid substrate 3.
As shown in fig. 2, the thermal fluid channel 1 includes a plurality of first division bars 101, the material of the first division bars 101 is a metal foam material, each first division bar 101 is a zigzag-shaped bar structure formed by connecting a plurality of continuous first z-shaped bars end to end, each first division bar 101 is arranged at equal intervals, a first channel 102 is formed between two adjacent first division bars 101, the first channel 102 is arranged in the thermal fluid substrate 3, an inlet and an outlet of the first channel 102 are respectively located on one opposite side of the heat exchanger core 5, and a thermal fluid circulates in the first channel 102. The bending angle of the Z-shaped flow channel of the metal foam material is an acute angle or an acute angle fillet, and other bending angles can be adopted, and the bending angle range is 0-45 degrees, namely the angle range of each bending position of the zigzag strip-shaped structure is 0-45 degrees.
As shown in fig. 3, the cold fluid channel 2 includes a plurality of second partition strips 201, the second partition strips 201 are metal solid structures, each second partition strip 201 is a second Z-shaped strip formed by bending a straight metal strip vertically to the right and then bending the straight metal strip vertically to the lower, each second partition strip 201 is arranged at equal intervals, a second channel 202 is formed between two adjacent second partition strips 201, the second channel 202 is arranged in the cold fluid base plate 4, an inlet and an outlet of the second channel 202 are respectively located on the other opposite sides of the heat exchanger core 5, and the cold fluid circulates in the second channel 202. In the invention, the hot fluid is smoke in automobile exhaust, and the cold fluid is CO2。
The cold fluid channel 2 of the invention is overlapped with the hot fluid channel 1 in space as much as possible, that is, the connecting line of the whole hot fluid channel 1 from the flue gas inlet to the flue gas outlet shown in fig. 1 and the two vertical bending parts of the second Z-shaped strip of the cold fluid channel 2 is exactly overlapped in the overlooking direction, so that the cold fluid in the cold fluid channel 2 can be closest to the hot fluid in the hot fluid channel 1, the contact surface is largest, and the heat of the hot fluid channel 1 is taken away as soon as possible.
As a further improved scheme, the porosity of the metal foam is between 0.7 and 0.98, the pore density of the metal foam is between 30PPI and 90PPI, and the porosity and the pore density of the metal foam are ranges with optimal comprehensive performance selected by continuously adjusting parameters after modeling the flue gas heat exchanger through the existing modeling software. The metal foam is made of aluminum, copper and nickel or an alloy of the aluminum, the copper and the nickel by adopting a sintering method, an electroplating method, a pressure casting method or a foaming method. Sintering, electroplating, pressure casting and foaming are all prior art and are not described herein.
As a further improvement scheme, the hydraulic diameter of the pore diameter of the hot fluid channel 1 is 1mm-3mm, and the hydraulic diameter of the pore diameter of the cold fluid channel 2 is 0.5mm-3 mm. The hydraulic diameter range is also the optimal hydraulic diameter range obtained by continuously adjusting parameters after modeling the flue gas heat exchanger through the existing modeling software and performing multi-objective optimization calculation according to the physical difference of the flue gas and the carbon dioxide.
As a further improvement, the heat exchanger core 5 is made of a corrosion-resistant material such as a metal foam material or stainless steel, and the corrosion-resistant material is adopted to prolong the service life of the whole heat exchanger.
As a further improved scheme, the surfaces of the zigzag flow channels of the metal foam material in the heat exchanger core 5 are coated with soot activation regeneration catalysts, and the soot activation regeneration catalysts are alkali metals or precious metals. The catalyst has the function of preventing soot particles from depositing in a flue gas flow passage, and if the soot particles deposit, the soot particles are easier to generate chemical reaction by using the heat of the flue gas, so that the influence of the soot particles is eliminated.
Through the technical scheme, the range of the linear distance from the starting point to the end point of the hot fluid channel 1 is 2-40mm, the heat exchanger core 5 is of a micron-sized printed circuit board type structure, the cold fluid channel 2 and the hot fluid channel 1 are periodically arranged in a staggered combination manner in the stacking direction, the compactness of the heat exchanger is greatly improved, the miniaturization and the light weight are realized, the hot fluid channel 1 adopts a Z-shaped flow channel made of metal foam materials, and the effects of changing the flow direction of the fluid and improving the turbulence degree can be achieved, meanwhile, part of the fluid flows through the metal foam to further improve the heat exchange performance, and the Z-shaped flow channel of the metal foam material greatly reduces the pressure drop due to the permeability of the metal foam, so that the heat exchange material can be applied to a vehicle-mounted waste heat recovery system, the method has very important significance for saving energy, reducing emission and realizing the miniaturization and integration of the waste heat recovery system of the internal combustion engine.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The metal foam base printed circuit board type flue gas heat exchanger is characterized by comprising a heat exchanger core body, wherein the heat exchanger core body is of a micron-sized printed circuit board type structure, the heat exchanger core body comprises a cold fluid channel and a hot fluid channel, the hot fluid channel adopts a Z-shaped runner made of metal foam materials, the cold fluid channel and the hot fluid channel are periodically arranged in a staggered combination manner in the stacking direction, and the range of the linear distance from a starting point to a terminal point of the hot fluid channel is between 2 and 40 mm.
2. The metal foam base printed circuit board type flue gas heat exchanger of claim 1, wherein the heat exchanger core is formed by high-temperature diffusion welding of at least one layer of hot fluid substrate and at least one layer of cold fluid substrate, the cold fluid substrate and the hot fluid substrate are periodically arranged in a staggered combination in a stacking direction, the cold fluid channel is arranged in the cold fluid substrate, and the hot fluid channel is arranged in the hot fluid substrate.
3. The metal foam-based printed circuit board type flue gas heat exchanger according to claim 2, wherein the thermal fluid channel comprises a plurality of first parting strips, the material of the first parting strips is metal foam, each first parting strip is a zigzag strip structure formed by connecting a plurality of continuous first z-shaped strips end to end, each first parting strip is arranged at equal intervals, a first channel is formed between every two adjacent first parting strips, the first channels are arranged in the thermal fluid substrate, the inlet and the outlet of each first channel are respectively positioned on one opposite side of the heat exchanger core, and the thermal fluid circulates in the first channels.
4. The metal foam-based printed circuit board type flue gas heat exchanger of claim 3, wherein the cold fluid channel comprises a plurality of second separating strips, the second separating strips are of a metal solid structure, each second separating strip is a second Z-shaped strip formed by bending a straight metal strip vertically to the right and then vertically to the lower, each second separating strip is arranged at equal intervals, a second channel is formed between every two adjacent second separating strips, the second channels are arranged in the cold fluid base plate, the inlets and the outlets of the second channels are respectively located on the other opposite sides of the heat exchanger core, and the cold fluid circulates in the second channels.
5. The metal foam based printed circuit board type flue gas heat exchanger of claim 1, wherein the metal foam porosity is between 0.7-0.98 and the metal foam cell density is between 30PPI-90 PPI.
6. The metal foam-based printed circuit board type flue gas heat exchanger of claim 1, wherein the metal foam is made of aluminum, copper, nickel or an alloy of aluminum, copper and nickel by sintering, electroplating, pressure casting or foaming.
7. The metal foam-based printed circuit board type flue gas heat exchanger according to claim 1, wherein the hydraulic diameter of the aperture of the hot fluid channel is 1mm-3mm, and the hydraulic diameter of the aperture of the cold fluid channel is 0.5mm-3 mm.
8. The metal foam-based printed circuit board type flue gas heat exchanger according to claim 1, wherein the bending angle of the zigzag flow channel of the metal foam material is an acute angle or an acute angle rounded off, and the bending angle ranges from 0 ° to 45 °.
9. The metal foam-based printed circuit board type flue gas heat exchanger of claim 1, wherein the heat exchanger core is made of metal foam material or stainless steel material.
10. The metal foam-based printed circuit board type flue gas heat exchanger of claim 1, wherein the surface of the zigzag flow channel of the metal foam material in the heat exchanger core is coated with a soot activation regeneration catalyst, and the soot activation regeneration catalyst is an alkali metal or a precious metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111015456.1A CN113670098A (en) | 2021-08-31 | 2021-08-31 | Metal foam base printed circuit board type flue gas heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111015456.1A CN113670098A (en) | 2021-08-31 | 2021-08-31 | Metal foam base printed circuit board type flue gas heat exchanger |
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| Publication Number | Publication Date |
|---|---|
| CN113670098A true CN113670098A (en) | 2021-11-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111015456.1A Pending CN113670098A (en) | 2021-08-31 | 2021-08-31 | Metal foam base printed circuit board type flue gas heat exchanger |
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| CN (1) | CN113670098A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116642353A (en) * | 2023-07-24 | 2023-08-25 | 中国核动力研究设计院 | Current collecting structure, heat exchange core and heat exchanger |
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|---|---|---|---|---|
| EP2124009A2 (en) * | 2008-05-20 | 2009-11-25 | The Boeing Company | Mixed carbon foam/metal foam heat exchanger |
| WO2012045845A1 (en) * | 2010-10-06 | 2012-04-12 | Behr Gmbh & Co. Kg | Heat exchanger |
| CN103528406A (en) * | 2013-10-31 | 2014-01-22 | 中国石油大学(华东) | Flat-plate heat exchanger filled with metal foam at partial portion |
| CN208620384U (en) * | 2018-05-10 | 2019-03-19 | 上海孚旺炉业有限公司 | A kind of composite board type flue gas heat-exchange unit |
| CN111256095A (en) * | 2020-01-14 | 2020-06-09 | 西安交通大学 | Method for manufacturing printed circuit board type steam generator and steam generator manufactured by same |
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2021
- 2021-08-31 CN CN202111015456.1A patent/CN113670098A/en active Pending
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