CN113804029B - Side-in type end socket structure suitable for micro-channel plate heat exchanger - Google Patents
Side-in type end socket structure suitable for micro-channel plate heat exchanger Download PDFInfo
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- CN113804029B CN113804029B CN202111115247.4A CN202111115247A CN113804029B CN 113804029 B CN113804029 B CN 113804029B CN 202111115247 A CN202111115247 A CN 202111115247A CN 113804029 B CN113804029 B CN 113804029B
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- 239000012530 fluid Substances 0.000 claims abstract description 75
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000000903 blocking effect Effects 0.000 claims description 17
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 238000009826 distribution Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 7
- 238000009827 uniform distribution Methods 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0246—Arrangements for connecting header boxes with flow lines
- F28F9/0251—Massive connectors, e.g. blocks; Plate-like connectors
-
- 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
A side-in type end socket structure suitable for a micro-channel plate heat exchanger belongs to the technical field of end socket structure design of heat exchanger equipment. The invention aims to solve the problem of overlarge pressure loss in the direct-in type end socket structure of the existing optimized heat exchanger. The invention relates to a side-entering type end socket structure suitable for a micro-channel plate heat exchanger, wherein the integral structure of the end socket structure is divided into a water inlet section, a divergent section and a diversion section; the cold fluid outlet of the water inlet section is connected with the cold fluid inlet of the divergent section, and the cold fluid outlet of the divergent section is connected with the cold fluid inlet of the diversion section; the cold fluid outlet of the diversion section is connected with the cold fluid inlet of the micro channel; the overall depth of the diversion section is gradually reduced. The invention is mainly used for connecting the micro-channels of the heat exchanger and uniformly distributing cold fluid into the micro-channels.
Description
Technical Field
The invention belongs to the technical field of heat exchanger equipment end socket structure design, and particularly relates to a side-in end socket structure suitable for a micro-channel plate heat exchanger.
Background
The micro-channel plate heat exchanger is widely applied to the fields of energy power, chemical industry, electric machinery, aerospace and the like, and has the characteristics of high heat transfer efficiency, compact structure, strong adaptability and the like. The micro channels are machined on the metal plates, channel plates on the cold working medium side and channel plates on the hot working medium side are alternately arranged together to form a multi-layer metal plate structure, and then the multi-layer metal plate structure is combined together in a brazing mode to form an alternate flow plate type micro channel plate type heat exchanger, and heat exchange is carried out on cold fluid in the hot fluid through the plates. In the running process of the micro-channel plate heat exchanger, the flow distribution of working medium among all flow channels is unbalanced due to the influences of pressure distribution, flow channel states and the like, so that the heat conduction of the longitudinal wall surface and the uneven distribution of the internal temperature are enhanced, and the efficiency of the heat exchanger is further deteriorated. The head structure of the general micro-channel plate heat exchanger is mainly a straight-in head structure (as shown in fig. 1 and 2), but the flow of cold fluid in the straight-in head structure has the problem of global non-uniformity, and even if structures such as baffles, guide plates or pore plates are added on two sides of the inlet of the straight-in head structure to improve the flow distribution in the head structure, the problem of excessive pressure loss in the straight-in head structure is directly caused.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the problem of overlarge pressure loss in the direct-in type end socket structure of the existing optimized heat exchanger; and further provides a side-entry type end socket structure suitable for the micro-channel plate heat exchanger.
The invention adopts the technical scheme for solving the technical problems that:
the side-entering type end socket structure suitable for the micro-channel plate heat exchanger is characterized in that the integral structure of the end socket structure is divided into a water inlet section, a divergent section and a diversion section; the cold fluid outlet of the water inlet section is connected with the cold fluid inlet of the divergent section, and the cold fluid outlet of the divergent section is connected with the cold fluid inlet of the diversion section; the cold fluid outlet of the diversion section is connected with the cold fluid inlet of the micro channel; the overall depth of the diversion section is gradually reduced.
Further, the seal head structure comprises two side vertical plates, an upper top plate, a lower bottom plate and a rear blocking plate, wherein the two side vertical plates are vertically and oppositely arranged, and the upper top plate and the lower bottom plate are vertically and oppositely arranged and are respectively welded between the two side vertical plates; the rear blocking plate is fixedly arranged at the tail end of a flow channel formed by the two side vertical plates and the upper top plate; the front end surfaces of the two side vertical plates, the front end surface of the upper top plate and the front end surface of the lower bottom plate form a cold fluid inlet, the lower end surfaces of the two side vertical plates, the lower end surface of the lower bottom plate and the lower end surface of the rear blocking plate form a cold fluid outlet, and the cold fluid outlet is connected to the inlet of the micro channel of the heat exchanger;
the upper top plate comprises a horizontal section, an inclined section and a streamline section; establishing a plane rectangular coordinate system for a curve of the streamline section of the upper top plate projected to the paper surface, wherein the origin of the coordinate system is an endpoint of the tail end of the curve, and the direction of the x axis is the inflow direction of cold fluid; the parameterization equation for the curve structure of the streamline section projected to the paper surface is as follows:
wherein n is a variable parameter.
Further, a guide plate is obliquely arranged between the diverging section and the guide section of the end socket structure or at the front end of the guide section, a first gap is reserved between the upper end face of the guide plate and the inner wall of the diverging section of the end socket structure, and a second gap is reserved between the lower end face of the guide plate and the inlet of the micro channel of the heat exchanger.
Further, the deflector is an orifice plate, and a plurality of deflector orifices are arranged on the deflector in an array mode.
Further, the distance between the gravity center position of the guide plate and the inlet of the end socket structure is L, and the value range of L is 15-25 mm.
Further, the included angle between the guide plate and the vertical surface is set as alpha, and the value range of alpha is 0< alpha <90 degrees.
Further, the circle center distance of two adjacent transverse diversion holes is R, the value of R is 3mm, the aperture of the diversion holes is phi, and the value range of phi is 0.5mm < phi <2.5mm.
Further, the thickness of the baffle is 1mm.
Further, the juncture of the guide plate and the two side wall surfaces of the fluid contact part is subjected to rounding treatment with the radius of 0.5 mm; and (3) carrying out rounding treatment with the radius of 0.2mm at the intersection line of the side wall surface of the guide hole and the surface of the guide plate.
Furthermore, the two side vertical plates, the upper top plate, the lower bottom plate, the rear blocking plate and the guide plate are all manufactured by adopting metal titanium.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adopts the side-in type end socket structure, designs the outer part of the end socket based on a cubic spline curve, gradually presses down the depth of the end socket structure to reduce the pressure loss generated by the internal huge vortex, and weakens the huge pressure drop caused by the internal huge vortex of the end socket; the phenomenon of impact of cold fluid jet flow is reduced by adding the porous guide plate in the end socket, so that the problem of vortex dead zone of the cold fluid at the inlet of the micro channel at the inlet side of the end socket is solved, and the approximately uniform distribution of the fluid entering the inlet of the flow channel is realized;
2. according to the invention, the relative placement position, the inclination angle and the aperture of the guide plate are changed according to the actual working conditions, and the three parameters are adjusted to adapt to different running environments, so that the overall efficiency of the heat exchanger is improved to the greatest extent;
3. the juncture of the two side wall surfaces of the fluid contact part of the guide plate and the side wall of the guide hole and the intersection line of the side wall of the guide plate are respectively rounded, so that the local pressure loss in the seal head structure is reduced;
4. the invention solves the problem of uniform distribution of cold fluid in the micro channel of the heat exchanger, and also solves the problems of local turbulence, pressure loss and nonuniform temperature distribution in the micro channel caused by nonuniform flow distribution before the cold fluid enters the micro channel, and finally solves the problem of performance degradation of the heat exchanger.
Drawings
FIG. 1 shows an inlet mode of a straight-in type seal head structure;
FIG. 2 is a schematic view of a straight-in head structure and a general flow path of a flow channel after entering the head structure;
FIG. 3 is a schematic diagram of a side entry head structure of the present invention;
FIG. 4 is a schematic diagram of a side entry head structure and a flow path according to the present invention;
FIG. 5 is a schematic view of a "spline curve" of the shell of the side entry head structure of the present invention;
FIG. 6 is a schematic view of a baffle structure; FIG. 6 (a) is a schematic view of the structure of the baffle plate with the inner diameter of the baffle hole being 0.5 mm; FIG. 6 (b) is a schematic view of the structure of the baffle plate with the inner diameter of the baffle hole being 2.5mm;
FIG. 7 is a schematic view of the angle of inclination of the baffle;
FIG. 8 is a schematic diagram of the relative positions of baffles;
FIG. 9 is a schematic diagram showing the dimensions of the seal head structure and the dimensions of the micro-channels in embodiment 1 of the present invention; fig. 9 (a) is a front view of the present invention; fig. 9 (b) is a left side view of the present invention; fig. 9 (C) is a partial enlarged view at C in fig. 9 (b); FIG. 9 (d) is a top view of the present invention with the upper top plate removed; fig. 9 (e) is a partial enlarged view at B in fig. 9 (d);
FIG. 10 is a numerical simulation diagram of a structure of a side entry type seal head structure according to an embodiment of the present invention under a certain working condition; FIG. 10 (a) is a schematic diagram showing the velocity of the cold fluid at the first gap, the second gap and the baffle just before entering the head structure; fig. 10 (b) is a schematic diagram showing the fluid states at the first gap, the second gap and the baffle when the cold fluid is in a steady state after completely entering the seal head structure.
Detailed Description
The technical scheme of the invention is further described by the following specific embodiments with reference to the accompanying drawings:
as shown in fig. 3 and fig. 4, the side-entering seal head structure suitable for the micro-channel plate heat exchanger comprises two side vertical plates 1, an upper top plate 2, a lower bottom plate 3 and a rear plugging plate 4, wherein the two side vertical plates 1 are vertically and oppositely arranged, the upper top plate 2 and the lower bottom plate 3 are vertically and oppositely arranged and are respectively welded between the two side vertical plates 1, namely, two side end surfaces of the upper top plate 2 are respectively welded with the upper end surfaces of the two side vertical plates 1, and two side end surfaces of the lower bottom plate 3 are respectively welded with the lower end surfaces of the two side vertical plates 1; the rear blocking plate 4 is fixedly arranged at the tail end of a flow channel formed by the two side vertical plates 1 and the upper top plate 2, namely, two opposite side end surfaces of the rear blocking plate 4 are respectively welded on the rear end surfaces of the two side vertical plates 1, and the upper end surface of the rear blocking plate 4 is welded on the rear end surface of the upper top plate 2;
the front end surfaces of the two side vertical plates 1, the front end surface of the upper top plate 2 and the front end surface of the lower bottom plate 3 form a cold fluid inlet, the lower end surfaces of the two side vertical plates 1, the lower end surface of the lower bottom plate 3 and the lower end surface of the rear blocking plate 4 form a cold fluid outlet, and the cold fluid outlet is connected to the inlet of the heat exchanger micro channel 5; as shown in fig. 5, the whole structure of the seal head structure is divided into a water inlet section 6, a divergent section 7 and a diversion section 8; the cold fluid outlet of the water inlet section 6 is connected with the cold fluid inlet of the diverging section 7, and the cold fluid outlet of the diverging section 7 is connected with the cold fluid inlet of the guiding section 8; the overall depth of the diversion section 8 is gradually reduced; namely, the two side vertical plates 1, the upper top plate 2 and the lower bottom plate 3 are all abnormal plates, and the upper top plate 2 comprises a horizontal section 2-1, an inclined section 2-2 and a streamline section 2-3; as shown in fig. 3, a plane rectangular coordinate system is established for a curve of the streamline section 2-3 of the upper top plate projected to the paper surface, the origin of the coordinate system is an end point of the curve tail end, and the direction of the x axis is the direction of inflow of cold fluid; the parameterization of the curve structure of the streamline section 2-3 projected to the paper surface is as follows:
wherein n is a variable parameter, and the variable guiding curve is changed to a certain extent, so that different shell structures are formed.
The shell structure of the end socket structure adopts the structural design of a cubic spline curve to form a streamline shell structure, the structural appearance of the shell structure is changed according to actual application scenes, namely, the shell structure is determined according to the flow speed of a working medium at an end socket inlet, the basic physical properties (viscosity) of the working medium, the environmental pressure and other factors, and a proper streamline structure is selected to adapt to different working conditions; the streamline shell structure gradually presses down the depth, reduces the pressure loss generated by the huge vortex in the end socket structure, and weakens the huge pressure drop caused by the huge vortex in the end socket.
As an alternative embodiment, in order to uniformly distribute the cold fluid into the micro channels 5 of each heat exchanger, as shown in fig. 4 and 6, a deflector 9 is obliquely arranged between the diverging section 7 and the guiding section 8 of the seal head structure or at the front end of the guiding section 8, a first gap is reserved between the upper end surface of the deflector 9 and the inner wall of the diverging section of the seal head structure, a second gap is reserved between the lower end surface of the deflector 9 and the inlet of the micro channel of the heat exchanger, the deflector 9 is an orifice plate, and a plurality of guiding holes 9-1 are arranged on the deflector 9 in an array manner; as shown in fig. 7, the diversion holes 9-1, the first gap and the second gap all achieve the diversion effect, and because the first gap and the second gap are not affected by the resistance of the diversion plate, the cold fluid flowing through the first gap flows to the tail end of the diversion section 8 of the seal head structure under the action of the streamline section 2-3 of the upper top plate 2, the cold fluid flowing through the diversion plate 9 flows to the middle and middle rear position of the diversion section 8 of the seal head structure, and the cold fluid flowing through the second gap flows to the front end and middle front position of the diversion section 8 of the seal head structure; through FIG. 7, it can be clearly seen that cold fluid enters from the inlet of the seal head structure, and flows into each micro channel 5 uniformly under the action of the shell of the seal head structure, so that uniform distribution of flow of the seal head structure is realized; the cold fluid enters the micro-channel, exchanges heat with the hot fluid at the other side and flows out; the invention solves the problem of uniform distribution of cold fluid in the micro channel of the heat exchanger, and also solves the problems of local turbulence, pressure loss and nonuniform temperature distribution in the micro channel caused by nonuniform flow distribution before the cold fluid enters the micro channel, and finally solves the problem of performance degradation of the heat exchanger.
As an alternative embodiment, in order to uniformly distribute the cold fluid into the micro-channel, reduce the local turbulence in the seal head and uniformly distribute the temperature in the micro-channel, as shown in fig. 8, the position of the guide plate 9 is adjusted according to different working conditions, the distance between the center of gravity of the guide plate 9 and the inlet of the seal head structure is L, and the value range of L is 15 mm-25 mm;
the initial position that guide plate 9 originally set up is 25mm department from head structure entrance, and guide plate 9 translates to head structure entrance according to different operating modes gradually, and the maximum translation distance is 10mm.
As an alternative embodiment, in order to uniformly distribute the cooling medium into the micro-channel, reduce the local turbulence in the seal head, and uniformly distribute the temperature in the micro-channel, as shown in fig. 7, the inclination angle of the deflector 9 may be adjusted according to different working conditions, and the included angle between the deflector 9 and the vertical surface is set to be α, where the value range of α is 0< α <90 °.
As an alternative implementation mode, in order to uniformly distribute the cooling working medium into the micro-channel, reduce the local turbulence in the seal head and uniformly distribute the temperature in the micro-channel, the aperture size of the diversion holes 9-1 is adjusted according to different working conditions, namely, the circle center distance of two laterally adjacent diversion holes 9-1 is R, the value of R is 3mm, the aperture of the diversion holes 9-1 is phi, and the value range of phi is 0.5mm < phi <2.5mm.
As an alternative implementation manner, in order to reduce the local pressure loss in the seal head structure as much as possible, the edges of the side wall of the guide plate and the edges of the wall of the guide hole are respectively subjected to rounding treatment; namely, when the guide plate 9 is processed, the juncture of the guide plate and the two side wall surfaces of the fluid contact part is subjected to rounding treatment with the radius of 0.5 mm; when the diversion holes 9-1 are processed, the intersection line of the side wall surface of the diversion holes and the side wall of the diversion plate is subjected to rounding treatment with the radius of 0.2 mm.
According to the invention, the relative placement position, the inclination angle and the aperture of the guide plate are respectively adjusted according to the influence of the actual working conditions such as the flow speed of the cooling working medium at the inlet of the end socket, the basic physical properties (viscosity) of the working medium, the ambient pressure and the like, and the three parameters are adjusted to adapt to different running environments, so that the overall efficiency of the heat exchanger is improved to the greatest extent.
As an alternative embodiment, the two side vertical plates 1, the upper top plate 2, the lower bottom plate 3, the rear blocking plate 4 and the guide plate 9 are all made of metal titanium, and are consistent with the whole material of the heat exchanger, so that the power-weight ratio (the ratio of power to mass) of the light heat exchanger is improved.
The embodiment 1, a side-in type end enclosure structure suitable for a micro-channel plate heat exchanger comprises two side vertical plates 1, an upper top plate 2, a lower bottom plate 3, a rear blocking plate 4 and a flow guide plate 9, wherein the two side vertical plates 1 are vertically and oppositely arranged, the upper top plate 2 and the lower bottom plate 3 are vertically and oppositely arranged, two side end surfaces of the upper top plate 2 are respectively welded with the upper end surfaces of the two side vertical plates 1, and two side end surfaces of the lower bottom plate 3 are respectively welded with the lower end surfaces of the two side vertical plates 1; the two opposite side end surfaces of the rear blocking plate 4 are respectively welded on the rear end surfaces of the two side vertical plates 1, and the upper end surface of the rear blocking plate 4 is welded on the rear end surface of the upper top plate 2;
the front end surfaces of the two side vertical plates 1, the front end surface of the upper top plate 2 and the front end surface of the lower bottom plate 3 form a cold fluid inlet, the inner diameter of the cold fluid inlet is 30mm, the inner diameter of the outlet of the divergent section is 50mm, the lower end surfaces of the two side vertical plates 1, the lower end surface of the lower bottom plate 3 and the lower end surface of the rear closure plate 4 form a cold fluid outlet, and the length of the cold fluid outlet is 150mm and the width of the cold fluid outlet is 39mm; the height of the rear blocking plate 4 is 10mm, the outlet of the cold fluid is connected with the inlet of the micro channel 5 of the heat exchanger, the space between heat exchange tubes of the micro channel 5 is 3.5mm, and the inner diameter of the heat exchange tubes is 2.5mm;
as shown in fig. 5, the whole structure of the seal head structure is divided into a water inlet section 6, a divergent section 7 and a diversion section 8; a guide plate 9 is obliquely arranged between the diverging section 7 and the guide section 8 of the end socket structure, a first gap is reserved between the upper end surface of the guide plate 9 and the inner wall of the diverging section of the end socket structure, a second gap is reserved between the lower end surface of the guide plate 9 and the inlet of the micro channel of the heat exchanger, the guide plate 9 is an orifice plate, and a plurality of guide holes 9-1 are arranged on the guide plate 9 in an array mode; the length of the water inlet section 6 is 10mm, and the inner diameter of the diverging section 7 is 50mm; the thickness of the guide plate 9 is 1mm, the side length of the guide plate 9 is 30mm, and the center distance R of two guide holes 9-1 adjacent transversely is 3mm;
when the flow velocity of the working medium at the inlet side of the end socket is between 0.21m/s and 1.03m/s, the inclination angle alpha=45° of the guide plate, the position L=22.7 mm of the guide plate from the inlet, the aperture phi=2.5 mm of the guide plate, and the side wall of the guide plate is subjected to rounding treatment with the radius of 0.5 mm; the hole wall of the diversion hole 9-1 is subjected to rounding treatment with the radius of 0.2 mm;
establishing a plane rectangular coordinate system for a curve of the streamline section 2-3 of the upper top plate projected to the paper surface, wherein the origin of the coordinate system is an endpoint of the tail end of the curve, and the direction of the x axis is the inflow direction of cold fluid; the parameterization of the curve structure of the streamline section 2-3 projected to the paper surface is as follows:
variable parameter n=5;
as shown in fig. 7, the diversion holes 9-1, the first gap and the second gap all achieve the diversion effect, and because the first gap and the second gap are not affected by the resistance of the diversion plate, the cold fluid flowing through the first gap flows to the tail end of the diversion section 8 of the seal head structure under the action of the streamline section 2-3 of the upper top plate 2, the cold fluid flowing through the diversion plate 9 flows to the middle and middle rear position of the diversion section 8 of the seal head structure, and the cold fluid flowing through the second gap flows to the front end and middle front position of the diversion section 8 of the seal head structure; through FIG. 7, it can be clearly seen that cold fluid enters from the inlet of the seal head structure, and flows into each micro channel 5 uniformly under the action of the shell of the seal head structure, so that uniform distribution of flow of the seal head structure is realized; the cold fluid enters the micro-channel, exchanges heat with the hot fluid at the other side and flows out; the invention solves the problem of uniform distribution of cold fluid in the micro channel of the heat exchanger, and also solves the problems of local turbulence, pressure loss and nonuniform temperature distribution in the micro channel caused by nonuniform flow distribution before the cold fluid enters the micro channel, and finally solves the problem of performance degradation of the heat exchanger.
It will be apparent that the embodiments described are some, but not all embodiments of the invention. Other embodiments of the present invention are also possible, and all other embodiments obtained by researchers of different technologies in the art without making creative efforts based on the embodiments of the present invention fall within the protection scope of the present invention without departing from the novel spirit and the structural essence of the embodiments of the present invention.
Claims (9)
1. Side income formula head structure suitable for little passageway plate heat exchanger, its characterized in that: the whole structure of the end socket structure is divided into a water inlet section (6), a divergent section (7) and a diversion section (8); the cold fluid outlet of the water inlet section (6) is connected with the cold fluid inlet of the diverging section (7), and the cold fluid outlet of the diverging section (7) is connected with the cold fluid inlet of the diversion section (8); the cold fluid outlet of the diversion section (8) is connected with the cold fluid inlet of the micro channel (5); the overall depth of the diversion section (8) is gradually reduced;
the end socket structure comprises two side vertical plates (1), an upper top plate (2), a lower bottom plate (3) and a rear blocking plate (4), wherein the two side vertical plates (1) are vertically and oppositely arranged, and the upper top plate (2) and the lower bottom plate (3) are vertically and oppositely arranged and respectively welded between the two side vertical plates (1); the rear blocking plate (4) is fixedly arranged at the tail end of a flow channel formed by the two side vertical plates (1) and the upper top plate (2); the front end surfaces of the two side vertical plates (1), the front end surface of the upper top plate (2) and the front end surface of the lower bottom plate (3) form a cold fluid inlet, the lower end surfaces of the two side vertical plates (1), the lower end surface of the lower bottom plate (3) and the lower end surface of the rear blocking plate (4) form a cold fluid outlet, and the cold fluid outlet is connected to the inlet of the heat exchanger micro-channel (5);
the upper top plate (2) comprises a horizontal section (2-1), an inclined section (2-2) and a streamline section (2-3); establishing a plane rectangular coordinate system for a curve projected to the paper surface by a streamline section (2-3) of the upper top plate, wherein the origin of the coordinate system is an endpoint of the tail end of the curve, and the direction of the x-axis is the inflow direction of cold fluid; the parameterization equation of the curve structure of the streamline section (2-3) projected to the paper surface is as follows:
wherein n is a variable parameter.
2. The side-entry head structure for a mini-channel plate heat exchanger of claim 1, wherein: the heat exchanger is characterized in that a guide plate (9) is obliquely arranged between the diverging section (7) and the guide section (8) of the end socket structure or at the front end of the guide section (8), a first gap is reserved between the upper end face of the guide plate (9) and the inner wall of the diverging section (7) of the end socket structure, and a second gap is reserved between the lower end face of the guide plate (9) and the inlet of the micro channel (5) of the heat exchanger.
3. A side entry head structure for a mini-channel plate heat exchanger as claimed in claim 2, wherein: the guide plate (9) is an orifice plate, and a plurality of guide holes (9-1) are arranged on the guide plate (9) in an array mode.
4. A side entry head structure for a mini-channel plate heat exchanger as claimed in claim 3, wherein: the distance between the gravity center position of the guide plate (9) and the inlet of the end socket structure is L, and the value range of L is 15-25 mm.
5. The side-entry head structure for a mini-channel plate heat exchanger as in claim 4, wherein: the included angle between the guide plate (9) and the vertical surface is alpha, and the value range of alpha is 0< alpha <90 degrees.
6. The side-entry head structure for a mini-channel plate heat exchanger of claim 5, wherein: the circle center distance of two adjacent transverse diversion holes (9-1) is R, the value of R is 3mm, the aperture of the diversion holes (9-1) is phi, and the value range of phi is 0.5mm < phi <2.5mm.
7. The side-entry head structure for a mini-channel plate heat exchanger of claim 6, wherein: the thickness of the guide plate (9) is 1mm.
8. The side-entry head structure for a mini-channel plate heat exchanger of claim 6, wherein: the juncture of the guide plate and the two side wall surfaces of the fluid contact part is subjected to rounding treatment with the radius of 0.5 mm; the intersection line of the side wall surface of the deflector hole (9-1) and the surface of the deflector plate is subjected to rounding treatment with the radius of 0.2 mm.
9. The side-entry head structure for a mini-channel plate heat exchanger of claim 6, wherein: the two side vertical plates (1), the upper top plate (2), the lower bottom plate (3), the rear blocking plate (4) and the guide plate (9) are all manufactured by adopting metal titanium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111115247.4A CN113804029B (en) | 2021-09-23 | 2021-09-23 | Side-in type end socket structure suitable for micro-channel plate heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111115247.4A CN113804029B (en) | 2021-09-23 | 2021-09-23 | Side-in type end socket structure suitable for micro-channel plate heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113804029A CN113804029A (en) | 2021-12-17 |
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| CN117968439B (en) * | 2024-04-01 | 2024-06-04 | 中国核动力研究设计院 | Flow equipartition seal head of heat exchanger and design method thereof |
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| CN112414162A (en) * | 2020-11-29 | 2021-02-26 | 承德石油高等专科学校 | Blade type water mixer |
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