CN113514491A - Bionic topology microchannel heat exchanger and fluid heat exchange experimental system thereof - Google Patents
Bionic topology microchannel heat exchanger and fluid heat exchange experimental system thereof Download PDFInfo
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- CN113514491A CN113514491A CN202110421861.7A CN202110421861A CN113514491A CN 113514491 A CN113514491 A CN 113514491A CN 202110421861 A CN202110421861 A CN 202110421861A CN 113514491 A CN113514491 A CN 113514491A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
- H05K7/20327—Accessories for moving fluid, for connecting fluid conduits, for distributing fluid or for preventing leakage, e.g. pumps, tanks or manifolds
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
- H05K7/20336—Heat pipes, e.g. wicks or capillary pumps
Abstract
The invention provides a bionic topology microchannel heat exchanger and a fluid heat exchange experimental system thereof, wherein an upper cover plate and a lower cover plate of a substrate are closed to form a closed independent space, a peristaltic pump in the heat exchange experimental system is connected between a liquid supply box and a test area, the other end of the test area is connected with a liquid cooling box through a pipeline, the other end of the liquid cooling box is connected with the liquid supply box through a pipeline, a temperature collector is respectively connected with an inlet, an outlet and the bottom surface of the bionic topology microchannel heat exchanger, and a pressure gauge is respectively connected with the inlet end and the outlet end of the heat exchanger and is used for measuring the pressure drop of the water inlet and the water outlet. The inlet and outlet arrangement of the flow channel and the uniform distribution of the flow channel can improve the heat exchange performance and the temperature equalizing performance of the heat exchanger, have higher heat dissipation efficiency, can meet the heat dissipation requirement of high-load electronic devices, and provide a reliable temperature environment for the electronic devices; the heat exchange effect of the heat exchanger can be rapidly detected; simple structure, convenient operation, low cost and greatly improved working efficiency.
Description
Technical Field
The invention relates to the technical field of micro-channel enhanced heat dissipation, in particular to a heat exchanger and a heat exchange experiment system thereof.
Background
With the development of technology and the progress of processing means, electronic components tend to be miniaturized and integrated, but because the heat generated by the components is not changed, extremely high heat flux density is generated. Failure to dissipate such high heat flow can result in the temperature of the components being higher than it can withstand, resulting in the burning and failure of the components. Therefore, increasingly miniaturized electronic components and other devices have made extremely high demands on the heat dissipation capability of equipment. Since the microchannel heat exchanger has a good heat dissipation effect, and researchers of the first microchannel heat exchanger can realize cooling with extremely high heat flow, the microchannel technology is applied to electronic equipment which tends to be integrated more and more.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a bionic topology microchannel heat exchanger and a fluid heat exchange experimental system thereof, and solves the problems that the traditional heat dissipation mode in the prior art cannot meet the heat dissipation requirement of a high-load electronic device, the traditional heat exchanger is low in heat exchange efficiency, the temperature environment of the electronic device is unreliable and the like.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a bionic topological microchannel heat exchanger comprises a substrate (1) and a U-shaped groove (2), wherein the substrate (1) is in a regular hexagon shape, the substrate (1) comprises an upper cover plate (3) and a lower cover plate (4), the upper cover plate (3) is a regular hexagon aluminum alloy plate with the thickness of 1.5mm, the lower cover plate (4) is provided with a runner, the runner is obtained by a topological optimization method, the volume of the runner is 50% of the volume of the whole lower cover plate, the temperature difference is the minimum optimization target, and the optimal runner is obtained after 114 times of iteration by using simulation software; the base plate (1) is provided with three inlets (6) and three outlets (7), the inlets (6) and the outlets (7) are respectively positioned at six vertex angles of a regular hexagon, the three inlets (6) and the three outlets (7) are arranged in a staggered mode, and flow channels are uniformly distributed in the lower cover plate (4); after the upper cover plate (3) and the lower cover plate (4) are closed, the whole flow channel is a closed independent space with three inlets (6) and three outlets (), wherein the bottom surface of the flow channel is parallel to the plane of the lower bottom plate, and the planes of the two U-shaped grooves (2) are parallel to the plane of the whole base plate (1).
U type groove (2) are equipped with collection groove (8) and pipe (9), every U type groove (2) are equipped with three collection groove (8) and three pipe (9), U type groove (2) and heat exchanger cooperation back, one side of the collection groove (8) in U type groove (2) is linked together with the export or the entry of base plate (1), the opposite side of collection groove (8) links to each other with the one end of pipe (9), the other end of pipe (9) passes through the hose and links to each other with shunt or converging the ware, the planar one side in the U type groove of perpendicular to (2) of U type groove (2) still is equipped with the connecting pipe of pressure gauge.
The inner side of the U-shaped groove (2) is provided with a boss, the upper end and the lower end of the substrate (1) are provided with grooves, and the boss on the inner side of the U-shaped groove (2) is clamped in the groove of the substrate (1).
The invention also provides a fluid heat exchange experimental system of the bionic topology microchannel heat exchanger, which comprises a peristaltic pump (14), a liquid cooling box (17), a liquid supply box (15) and a test area, wherein the test area comprises the bionic topology microchannel heat exchanger (11), a temperature collector (21), a pressure gauge (22), an electric heating device, a flow divider (12), a flow combiner (19) and a flow stopping valve, the peristaltic pump (14) is connected between the liquid supply box (15) and the test area, the other end of the test area is connected with the liquid cooling box (17) through a pipeline, and the other end of the liquid cooling box (17) is connected with the liquid supply box (15) through a pipeline.
In the test area, one end of a flow divider (12) is connected with a peristaltic pump (14) through a pipeline, the other end of the flow divider (12) is connected with a bionic topology microchannel heat exchanger (11) through a pipeline, the other end of the bionic topology microchannel heat exchanger (11) is connected with a junction station (19) through a pipeline, the other end of the junction station (19) is connected with a liquid cooling tank (17) through a pipeline, an electric heating device comprises a direct current power supply (18) and a heat source (20), the heat source (20) is connected with the direct current power supply (18), the heat source (20) is arranged on the bottom surface of the bionic topology microchannel heat exchanger (11) through heat-conducting silica gel, a temperature collector (21) is respectively connected with the inlet end and the outlet end of the bionic topology microchannel heat exchanger (11) and a pressure gauge (22) is respectively connected with the inlet end and the outlet end of the bionic topology microchannel heat exchanger (11), used for measuring the pressure drop of the water inlet and the water outlet.
The stop valve comprises a first stop valve (13) and a second stop valve (16), the first stop valve (13) is arranged between the peristaltic pump (14) and the test area and used for controlling cooling liquid to enter the test area, the second stop valve (16) is arranged between the liquid supply box (15) and the liquid cooling box (17) and used for controlling cooled fluid to enter the liquid supply box (15).
The flow divider (12) comprises a first water inlet pipe (23) and first water outlet pipes (24), wherein the first water inlet pipe (23) is communicated with the first water outlet pipes (24), the first water inlet pipe (23) is one, the first water outlet pipes (24) are three, one first water inlet pipe (23) is connected with the peristaltic pump (14) through a pipeline, and the three first water outlet pipes (24) are respectively connected with three round pipes (9) which are staggered in two U-shaped grooves of the bionic topology microchannel heat exchanger (11).
The flow combiner (19) comprises second water inlet pipes (25) and second water outlet pipes (26), wherein the second water inlet pipes (25) are communicated with the second water outlet pipes (26), the number of the second water inlet pipes (25) is three, the number of the second water outlet pipes (26) is one, the three second water inlet pipes (25) are respectively connected with three round pipes (9) which are staggered in two U-shaped grooves of the bionic topology microchannel heat exchanger (11), and one of the second water outlet pipes (26) is connected with the liquid cooling tank (17) through a pipeline.
The heat source (20) is formed by connecting a plurality of thin film resistors in series, the heat source (20) after being connected in series is supplied with current by a direct current power supply (18), and insulating materials are wrapped on all the surfaces of the heat source (20) except the surface which is in contact with the bionic topology microchannel heat exchanger (11).
The invention has the beneficial effects that:
(1) the bionic topology microchannel heat exchanger has the advantages that the lower cover plate is distributed with the runners, and the runners are uniformly distributed in the lower cover plate. The flow channel is provided with three inlets and three outlets, the inlets and the outlets are distributed in a staggered mode, and cold and hot flows can be well mixed. The inlet and outlet arrangement of the flow channel and the uniform distribution of the flow channel can improve the heat exchange performance and the temperature equalizing performance of the heat exchanger, have higher heat dissipation efficiency, can meet the heat dissipation requirement of high-load electronic devices, and provide a reliable temperature environment for the electronic devices;
(2) the fluid flow heat exchange experimental system comprises a peristaltic pump, a liquid cooling box, a liquid supply box and a test area, wherein the test area comprises a bionic topology microchannel heat exchanger;
(3) the bionic topology microchannel heat exchanger and fluid flow heat exchange experiment system has the advantages of simple structure, convenience in operation and low cost, and greatly improves the working efficiency.
Drawings
FIG. 1 is a schematic structural diagram of a bionic topology microchannel heat exchanger according to the invention.
Fig. 2 is a schematic structural view of the lower cover plate of the present invention.
Fig. 3 is a schematic view of the U-shaped groove structure of the present invention.
FIG. 4 is a schematic connection diagram of a fluid flow heat exchange experimental system of the present invention.
Fig. 5 is a schematic view of the diverter of the present invention.
Fig. 6 is a schematic diagram of a combiner structure according to the present invention.
The device comprises a substrate 1, a U-shaped groove 2, an upper cover plate 3, a lower cover plate 4, a flow channel 5, an inlet 6, an outlet 7, a flow collecting groove 8, a circular pipe 9, a pressure gauge connecting pipe 10, a bionic topological microchannel heat exchanger 11, a flow divider 12, a first check valve 13, a peristaltic pump 14, a liquid supply tank 15, a second check valve 16, a liquid cooling tank 17, a direct current power supply 18, a flow combiner 19, a heat source 20, a temperature collector 21, a pressure gauge 22, a first water inlet pipe 23, a first water outlet pipe 24, a second water inlet pipe 25 and a second water outlet pipe 26.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
Example 1
The invention discloses a bionic topological microchannel heat exchanger which comprises a substrate (1) and two U-shaped grooves (2), wherein the number of the U-shaped grooves (2) is two, the two U-shaped grooves (2) are respectively matched with two opposite sides of the substrate (1), the substrate (1) comprises an upper cover plate (3) and a lower cover plate (4), the lower cover plate (4) is provided with runners (5), the runners (5) are uniformly distributed on the lower cover plate (4), the runners (5) are communicated with three inlets (6) and three outlets (7), the upper cover plate (3) and the lower cover plate (4) are covered to enable each runner (5) to be an enclosed independent space with three inlets and three outlets, and the straight line where the runners (5) are located is parallel to the straight line where the two U-shaped grooves (2) are connected.
As shown in fig. 2, preferably, the flow channels (5) are uniformly distributed in the lower cover plate (4), the flow channels (5) have three inlets 6 and three outlets 7, and the three inlets 6 and the three outlets 7 are distributed in a staggered manner.
Example 2
As shown in figures 1-2, the invention discloses a bionic topology microchannel heat exchanger which comprises a substrate (1) and two U-shaped grooves (2), wherein the number of the U-shaped grooves (2) is two, the two U-shaped grooves (2) are respectively matched with two opposite sides of the substrate (1), the substrate (1) comprises an upper cover plate (3) and a lower cover plate (4), the lower cover plate (4) is provided with a flow channel (5), the flow channel (5) is provided with three inlets (6) and three outlets (7), the upper cover plate (3) and the lower cover plate (4) are covered to enable the channel to be a closed independent space with three inlets and three outlets, and a straight line where the flow channel (5) is located is parallel to a straight line where the two U-shaped grooves (2) are connected
As shown in fig. 2, preferably, the flow channels (5) are uniformly distributed in the lower cover plate (4), the flow channels (5) have three inlets (6) and three outlets (7), and the three inlets (6) and the three outlets (7) are distributed in a staggered manner.
As shown in fig. 3, preferably, the U-shaped groove (2) is provided with a flow collecting groove (8) and six circular tubes (9), wherein the number of the circular tubes (9) is six, the flow collecting groove (8) is respectively communicated with the six circular tubes (9), the inlet and outlet of the substrate (1) provided with the flow channel (5) can be in clamping butt joint with the flow collecting groove (8), and one side of the U-shaped groove (2) is further provided with a pressure gauge connecting tube (10).
As shown in fig. 3, preferably, a boss is provided inside the U-shaped groove (2), wherein grooves are provided at the upper and lower ends of the substrate (1), and the boss inside the U-shaped groove (2) is engaged with the groove of the substrate (1).
Example 3
As shown in figures 1-2, the invention discloses a bionic topology microchannel heat exchanger which comprises a substrate (1) and two U-shaped grooves (2), wherein the number of the U-shaped grooves (2) is two, the two U-shaped grooves (2) are respectively matched with two opposite sides of the substrate (1), the substrate (1) comprises an upper cover plate (3) and a lower cover plate (4), the lower cover plate (4) is provided with a flow channel (5), the flow channel (5) is provided with three inlets (6) and three outlets (7), the upper cover plate (3) and the lower cover plate (4) are covered to enable the channel to be a closed independent space with three inlets and three outlets, and a straight line where the flow channel (5) is located is parallel to a straight line where the two U-shaped grooves (2) are connected
As shown in fig. 2, preferably, the flow channels (5) are uniformly distributed in the lower cover plate (4), the flow channels (5) have three inlets 6 and three outlets 7, and the three inlets 6 and the three outlets (7) are distributed in a staggered manner.
As shown in fig. 3, preferably, the U-shaped groove (2) is provided with a flow collecting groove (8) and six circular tubes (9), wherein the number of the circular tubes (9) is six, the flow collecting groove (8) is respectively communicated with the six circular tubes (9), the inlet and outlet of the substrate (1) provided with the flow channel (5) can be in clamping butt joint with the flow collecting groove (8), and one side of the U-shaped groove (2) is further provided with a pressure gauge connecting tube (10).
As shown in fig. 3, preferably, a boss is provided inside the U-shaped groove (2), wherein grooves are provided at the upper and lower ends of the substrate (1), and the boss inside the U-shaped groove (2) can be engaged with the groove of the substrate (1).
As shown in FIG. 4, preferably, the fluid flow heat exchange experimental device for testing the bionic topological microchannel heat exchanger comprises a peristaltic pump (14), a liquid supply tank (15), a liquid cooling tank (17) and a test area, wherein the test area comprises the bionic topological microchannel heat exchanger (11), the peristaltic pump (14) is connected between the liquid supply tank (15) and the test area, the other end of the test area is connected with the liquid cooling tank (17) through a pipeline connection, and the other end of the liquid cooling tank (17) is connected with the liquid supply tank (15) through a pipeline.
As shown in fig. 4, preferably, the test device further comprises a check valve, wherein the check valve comprises a first check valve (13) and a second check valve (16), wherein the first check valve (13) is arranged between the peristaltic pump (14) and the test area, and wherein the second check valve (16) is arranged between the liquid cooling tank (17) and the liquid supply tank (15).
As shown in fig. 4, preferably, the test area further includes a temperature collector (21), a pressure gauge (22), an electric heating device, a flow divider (12) and a flow combiner (19), wherein one end of the flow divider (12) is connected to the peristaltic pump (14) through a pipeline, the other end of the flow divider (12) is connected to the bionic topology microchannel heat exchanger (11) through a pipeline, the other end of the bionic topology microchannel heat exchanger (11) is connected to the flow combiner (19) through a pipeline, the other end of the flow combiner (19) is connected to the liquid cooling tank (17) through a pipeline, the electric heating device includes a dc power supply (18) and a heat source (20), wherein the heat source (20) is connected to the dc power supply (18), the heat source (20) is disposed on one end face of the bionic topology microchannel heat exchanger (11), and the temperature collector (21) is respectively connected to an inlet end (6) and an outlet end (7) of the bionic topology microchannel heat exchanger (11), The bionic topological microchannel heat exchanger comprises a heat source (20), a liquid supply tank (15) and a liquid cooling tank (17), wherein the pressure gauges (22) are respectively connected with an inlet end (6) and an outlet end (7) of the bionic topological microchannel heat exchanger (11).
Example 5
As shown in figures 1-2, the invention discloses a bionic topology microchannel heat exchanger which comprises a substrate (1) and two U-shaped grooves (2), wherein the number of the U-shaped grooves (2) is two, the two U-shaped grooves (2) are respectively matched with two opposite sides of the substrate (1), the substrate (1) comprises an upper cover plate (3) and a lower cover plate (4), the lower cover plate (4) is provided with a flow channel (5), the flow channel (5) is provided with three inlets 6 and three outlets 7, the upper cover plate (3) and the lower cover plate (4) are covered to enable the channel to be a closed independent space with three inlets and three outlets, a straight line where the flow channel (5) is located is parallel to a straight line where the two U-shaped grooves (2) are connected, and the straight line is parallel to the straight line where the flow channel (5) is located
As shown in fig. 2, preferably, the flow channels (5) are uniformly distributed in the lower cover plate (4), the flow channels (5) have three inlets (6) and three outlets (7), and the three inlets (6) and the three outlets (7) are distributed in a staggered manner.
As shown in fig. 3, preferably, the U-shaped groove (2) is provided with a flow collecting groove (8) and six circular tubes (9), wherein the number of the circular tubes (9) is six, the flow collecting groove (8) is respectively communicated with the six circular tubes (9), the inlet and outlet of the substrate (1) provided with the flow channel (5) can be in clamping butt joint with the flow collecting groove (8), and one side of the U-shaped groove (2) is further provided with a pressure gauge connecting tube (10).
As shown in fig. 3, preferably, a boss is provided inside the U-shaped groove (2), wherein grooves are provided at the upper and lower ends of the substrate (1), and the boss inside the U-shaped groove (2) can be engaged with the groove of the substrate (1).
As shown in FIG. 4, preferably, the fluid flow heat exchange experimental device for testing the bionic topological microchannel heat exchanger comprises a peristaltic pump (14), a liquid supply tank (15), a liquid cooling tank (17) and a test area, wherein the test area comprises the bionic topological microchannel heat exchanger (11), the peristaltic pump (14) is connected between the liquid supply tank (15) and the test area, the other end of the test area is connected with the liquid cooling tank (17) through a pipeline connection, and the other end of the liquid cooling tank (17) is connected with the liquid supply tank (15) through a pipeline.
As shown in fig. 4, preferably, the test device further comprises a check valve, wherein the check valve comprises a first check valve (13) and a second check valve (16), wherein the first check valve (13) is arranged between the peristaltic pump (14) and the test area, and wherein the second check valve (16) is arranged between the liquid cooling tank (17) and the liquid supply tank (15).
As shown in fig. 4, preferably, the test area further includes a temperature collector (21), a pressure gauge (22), an electric heating device, a flow divider (12) and a flow combiner (19), wherein one end of the flow divider (12) is connected to the peristaltic pump (14) through a pipeline, the other end of the flow divider (12) is connected to the bionic topology microchannel heat exchanger (11) through a pipeline, the other end of the bionic topology microchannel heat exchanger (11) is connected to the flow combiner (19) through a pipeline, the other end of the flow combiner (19) is connected to the liquid cooling tank (17) through a pipeline, the electric heating device includes a dc power supply (18) and a heat source (20), wherein the heat source (20) is connected to the dc power supply (18), the heat source (20) is disposed on one end surface of the bionic topology microchannel heat exchanger (11), and the temperature collector (21) is connected to the inlet end 6 and the outlet end 7 of the bionic topology microchannel heat exchanger (11) respectively, The heat source (20), the liquid supply tank (15) and the liquid cooling tank (17) and the pressure gauge (22) are respectively connected with the inlet end 6 and the outlet end 7 of the bionic topology microchannel heat exchanger (11).
As shown in fig. 5, fig. 5 has the same structure as fig. 6, but the flow direction of the coolant is different during operation. The flow divider (12) comprises a first water inlet pipe (23) and a first water outlet pipe (24), wherein the first water inlet pipe (23) is communicated with the first water outlet pipe (24), the number of the first water inlet pipe (23) is one, the number of the first water outlet pipe (24) is three, the first water inlet pipe (23) is connected with a peristaltic pump (14) through a pipeline, and three circular pipes (9) which are staggered in two U-shaped grooves (2) of the bionic topology microchannel heat exchanger (11) are respectively connected with the three first water outlet pipes (24).
As shown in fig. 6, preferably, the flow combiner (19) includes a second water inlet pipe (25) and a second water outlet pipe (26), wherein the second water inlet pipe (25) is communicated with the second water outlet pipe (26), the number of the second water inlet pipes (25) is three, the number of the second water outlet pipes (26) is one, the three second water inlet pipes (25) are respectively connected with three round pipes (9) staggered in two U-shaped grooves (2) of the bionic topology microchannel heat exchanger (11), and one of the second water outlet pipes (26) is connected with the liquid cooling tank (17) through a pipeline.
Preferably, the heat source (20) is composed of a plurality of thin film resistors, wherein insulating materials are wrapped on all the surfaces of the heat source (20) except the surface which is in contact with the bionic microchannel heat exchanger.
The working process of the invention is as follows:
bionic topology microchannel heat exchanger (11) includes base plate (1) and U type groove (2), and processing has collection groove (8) and pipe (9) to flow in and out for the cooling liquid on U type groove (2), and base plate (1) comprises upper cover plate (3) and lower apron (4), and processing has runner (5) down on apron (4), runner (5) evenly set up in apron (4) down, the runner gets as the target topology with the samming, can improve the heat transfer performance and the samming performance of heat exchanger, and the runner of bionic topology microchannel heat exchanger (11) communicates three entry (6) and three export (7), and wherein upper and lower apron welding provides a inclosed passageway for the liquid.
The invention provides a fluid flow heat exchange experimental device for the bionic topology microchannel heat exchanger (11), which comprises a peristaltic pump (14), a liquid supply box (15), a liquid cooling box (17) and a test area, wherein the test area also comprises a temperature collector (21), a pressure gauge (22), an electric heating device, a flow divider (12) and a flow combiner (19), cooling liquid is divided into three branches through the flow divider (12) and flows into the bionic topology microchannel heat exchanger (11) from three inlets, then flows out of three outlets of the flow combiner (19) and is combined into one branch to flow into the liquid cooling box, a liquid outlet of the liquid supply box (15) is communicated with an inlet of the test area, an outlet of the test area is communicated with an inlet of the liquid cooling box (17) through a pipeline, a liquid outlet of the liquid cooling box (17) is communicated with a liquid inlet of the liquid supply box (15), and the invention provides an inlet and outlet method of fluid in the bionic topology microchannel heat exchanger (11) with multiple inlets and multiple outlets, the cooling liquid passes through the microchannel heat exchanger (11) loaded with the heat source (20), the temperature of the cooling liquid is increased, the cooling liquid is introduced into the liquid cooling box (17) to be cooled to the inlet temperature, and then the cooling liquid flows into the liquid supply box (15) through the second check valve (16).
The cooling liquid in the liquid supply tank flows through a first stop valve (13) under the drive of a peristaltic pump (14), is injected into a test area, flows into a bionic topological microchannel heat exchanger (11) with a heat source from three inlets (6) through a flow divider (12), flows out of the test area through a flow combiner (19) from three outlets (7) to flow into a liquid cooling tank (17), and can flow into the liquid supply tank (15) from the liquid cooling tank (17) if a second stop valve (16) is opened, so that circulation is realized; in the process, the electric heating device is started, the loaded heat flow density is adjusted to a required value, each temperature value and each pressure value can be read after the pressure gauge (22) and the temperature collector (21) are stabilized, the temperature of the cooling liquid can be increased after the cooling liquid passes through the bionic topology microchannel heat exchanger loaded with the heat source, in order to ensure that the temperature of the cooling liquid is reduced to the inlet temperature, the fluid cooling tank (17) of the fluid channel is used for measuring the temperature of the liquid in the fluid cooling tank (17), and the second check valve (16) is started when the temperature of the cooling liquid is reduced to the inlet temperature, so that the cooling liquid in the fluid cooling tank (17) flows into the liquid supply tank (15).
The testing area is uniformly heated by adopting a heat source (20), the thin film resistor is used as an external heat source, the temperatures of the inlet and the outlet of the bionic topology microchannel heat exchanger and the temperature of the heating surface of the bionic topology microchannel heat exchanger are measured, the convection heat exchange coefficient of the bionic topology microchannel heat exchanger can be calculated according to the heat flow density provided by the heat source, the average temperature of a fluid inlet and a fluid outlet and the temperature of the heating surface of the bionic topology microchannel heat exchanger, and the pressure at two ends of the testing section is measured by a pressure gauge (22) to obtain the flow resistance parameter of the bionic topology microchannel heat exchanger.
Bionical topology microchannel heat exchanger adds a pair of U type groove (2), and the arrangement that corresponds respectively is at the both ends of bionical topology microchannel heat exchanger, and processing has one and enables the abundant inflow groove (8) that flow flows of fluid on U type groove (2), and processing has the boss that can carry out the positioning action with the heat exchanger on the two inboards of inflow groove (8), and base plate (1) is equipped with the recess from top to bottom, the inboard boss of inflow groove (8) can block in the recess of base plate (1), and bionical topology microchannel heat exchanger's every entry all has an inflow groove (8), and every export corresponds an inflow groove (8), and two such U type grooves (2) have three entry inflow groove and three export inflow groove.
The bionic topology microchannel heat exchanger is characterized in that a heat source (20) is loaded on a cover plate of the bionic topology microchannel heat exchanger to provide required heat flux density for the bionic topology microchannel heat exchanger, the heat source (20) is composed of a plurality of thin film resistors, heat is transferred to a heated surface of the microchannel through heat conducting silica gel, the heat flux density can be controlled by the number of the thin film resistors on one hand and can be controlled by adjusting current on the other hand, and in order to reduce heat loss, the heat source is wrapped with a layer of insulating material on the other surfaces except the surface in contact with the bionic topology microchannel heat exchanger.
The temperature collector (21) needs to measure the temperature of 5 parts: the temperature of cooling liquid at the inlet of the bionic topology microchannel heat exchanger, the temperature of cooling liquid at the outlet of the bionic topology microchannel heat exchanger, the temperature of the heating surface of the bionic topology microchannel heat exchanger, the temperature of cooling liquid in the liquid cooling box (17) and the temperature in the liquid supply box are tested by adopting thermocouples, all the thermocouples are connected to the temperature collector, and the temperature values of all points can be displayed on the temperature collector.
The lower cover plate (4) of the bionic topology microchannel heat exchanger is provided with uniform flow channels, the flow channels are provided with three inlets and three outlets, and the inlets and the outlets are distributed in a staggered manner.
The fluid flow heat exchange experimental system comprises a peristaltic pump, a liquid cooling box, a liquid supply box and a test area, wherein the test area comprises a bionic topological micro-channel heat exchanger, the peristaltic pump is connected between the liquid supply box and the test area, the other end of the test area is connected with the liquid cooling box through a pipeline, the other end of the liquid cooling box is connected with the liquid supply box through a pipeline, the test area further comprises a temperature collector, a pressure gauge, an electric heating device, a flow divider and a flow combiner, and the fluid flow heat exchange experimental device can rapidly detect the heat exchange effect of the heat exchanger; the bionic topology microchannel heat exchanger and fluid flow heat exchange experimental device disclosed by the invention are simple in structure, convenient to operate and low in cost, and the working efficiency is greatly improved.
Although the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, but only by the scope of the appended claims.
Claims (9)
1. The utility model provides a bionical topology microchannel heat exchanger, includes base plate (1) and U type groove (2), its characterized in that:
the base plate (1) is in a regular hexagon shape, the base plate (1) comprises an upper cover plate (3) and a lower cover plate (4), the upper cover plate (3) is a regular hexagon aluminum alloy plate with the thickness of 1.5mm, the lower cover plate (4) is provided with a flow channel, the flow channel is obtained by a topological optimization method, the volume of the flow channel is set to be 50% of the volume of the whole lower cover plate, the temperature difference is the minimum optimization target, and the optimal flow channel is obtained after iteration by using simulation software; the base plate (1) is provided with three inlets (6) and three outlets (7), the inlets (6) and the outlets (7) are respectively positioned at six vertex angles of a regular hexagon, the three inlets (6) and the three outlets (7) are arranged in a staggered mode, and flow channels are uniformly distributed in the lower cover plate (4); after the upper cover plate (3) and the lower cover plate (4) are closed, the whole flow channel is a closed independent space with three inlets (6) and three outlets (), wherein the bottom surface of the flow channel is parallel to the plane of the lower bottom plate, and the planes of the two U-shaped grooves (2) are parallel to the plane of the whole base plate (1).
2. The bionic topology microchannel heat exchanger of claim 1, wherein:
u type groove (2) are equipped with collection groove (8) and pipe (9), every U type groove (2) are equipped with three collection groove (8) and three pipe (9), U type groove (2) and heat exchanger cooperation back, one side of the collection groove (8) in U type groove (2) is linked together with the export or the entry of base plate (1), the opposite side of collection groove (8) links to each other with the one end of pipe (9), the other end of pipe (9) passes through the hose and links to each other with shunt or converging the ware, the planar one side in the U type groove of perpendicular to (2) of U type groove (2) still is equipped with the connecting pipe of pressure gauge.
3. The bionic topology microchannel heat exchanger of claim 1, wherein:
the inner side of the U-shaped groove (2) is provided with a boss, the upper end and the lower end of the substrate (1) are provided with grooves, and the boss on the inner side of the U-shaped groove (2) is clamped in the groove of the substrate (1).
4. A fluid heat exchange experimental system using the bionic topology microchannel heat exchanger as claimed in claim 1, is characterized in that:
the fluid heat exchange experimental system of the bionic topology microchannel heat exchanger comprises a peristaltic pump (14), a liquid cooling box (17), a liquid supply box (15) and a test area, wherein the test area comprises the bionic topology microchannel heat exchanger (11), a temperature collector (21), a pressure gauge (22), an electric heating device, a flow divider (12), a flow combiner (19) and a flow stopping valve, the peristaltic pump (14) is connected between the liquid supply box (15) and the test area, the other end of the test area is connected with the liquid cooling box (17) through a pipeline, and the other end of the liquid cooling box (17) is connected with the liquid supply box (15) through a pipeline.
5. The fluid heat exchange experimental system of the bionic topology microchannel heat exchanger as claimed in claim 4, is characterized in that:
in the test area, one end of a flow divider (12) is connected with a peristaltic pump (14) through a pipeline, the other end of the flow divider (12) is connected with a bionic topology microchannel heat exchanger (11) through a pipeline, the other end of the bionic topology microchannel heat exchanger (11) is connected with a junction station (19) through a pipeline, the other end of the junction station (19) is connected with a liquid cooling tank (17) through a pipeline, an electric heating device comprises a direct current power supply (18) and a heat source (20), the heat source (20) is connected with the direct current power supply (18), the heat source (20) is arranged on the bottom surface of the bionic topology microchannel heat exchanger (11) through heat-conducting silica gel, a temperature collector (21) is respectively connected with the inlet end and the outlet end of the bionic topology microchannel heat exchanger (11) and a pressure gauge (22) is respectively connected with the inlet end and the outlet end of the bionic topology microchannel heat exchanger (11), used for measuring the pressure drop of the water inlet and the water outlet.
6. The fluid heat exchange experimental system of the bionic topology microchannel heat exchanger as claimed in claim 4, is characterized in that:
the stop valve comprises a first stop valve (13) and a second stop valve (16), the first stop valve (13) is arranged between the peristaltic pump (14) and the test area and used for controlling cooling liquid to enter the test area, the second stop valve (16) is arranged between the liquid supply box (15) and the liquid cooling box (17) and used for controlling cooled fluid to enter the liquid supply box (15).
7. The fluid heat exchange experimental system of the bionic topology microchannel heat exchanger as claimed in claim 4, is characterized in that:
the flow divider (12) comprises a first water inlet pipe (23) and first water outlet pipes (24), wherein the first water inlet pipe (23) is communicated with the first water outlet pipes (24), the first water inlet pipe (23) is one, the first water outlet pipes (24) are three, one first water inlet pipe (23) is connected with the peristaltic pump (14) through a pipeline, and the three first water outlet pipes (24) are respectively connected with three round pipes (9) which are staggered in two U-shaped grooves of the bionic topology microchannel heat exchanger (11).
8. The fluid heat exchange experimental system of the bionic topology microchannel heat exchanger as claimed in claim 4, is characterized in that:
the flow combiner (19) comprises second water inlet pipes (25) and second water outlet pipes (26), wherein the second water inlet pipes (25) are communicated with the second water outlet pipes (26), the number of the second water inlet pipes (25) is three, the number of the second water outlet pipes (26) is one, the three second water inlet pipes (25) are respectively connected with three round pipes (9) which are staggered in two U-shaped grooves of the bionic topology microchannel heat exchanger (11), and one of the second water outlet pipes (26) is connected with the liquid cooling tank (17) through a pipeline.
9. The fluid heat exchange experimental system of the bionic topology microchannel heat exchanger as claimed in claim 4, is characterized in that:
the heat source (20) is formed by connecting a plurality of thin film resistors in series, the heat source (20) after being connected in series is supplied with current by a direct current power supply (18), and insulating materials are wrapped on all the surfaces of the heat source (20) except the surface which is in contact with the bionic topology microchannel heat exchanger (11).
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