CN115791244A - Modular microchannel compact heat exchange experiment body, method, equipment and medium - Google Patents
Modular microchannel compact heat exchange experiment body, method, equipment and medium Download PDFInfo
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Abstract
The invention discloses a modular microchannel compact heat exchange experiment body, method, equipment and medium, and belongs to the technical field of performance test of heat exchange equipment. The experiment body comprises a core body module, a boundary module and a heat exchange module, wherein the core body module is used for realizing that a fluid working medium flows through a flow channel to be detected and exchanges heat with the boundary module to finish a convective heat exchange process; the boundary module is used for realizing that boundary working media flow through to provide different heat exchange boundary conditions for the core module so as to complete the performance measurement of the core module under different boundary conditions; and the connecting assembly is used for compressing and fixing the core body module and the boundary module and guiding the working medium to enter and exit. The invention is based on modular design, can measure the thermodynamic parameters in the microchannel, and provides data support for researching the microchannel heat exchanger and establishing a flowing heat transfer experiment database.
Description
Technical Field
The invention relates to the technical field of performance testing of heat exchange equipment, in particular to a modular microchannel compact heat exchange experiment body, a method, equipment and a medium.
Background
The heat exchanger is general process equipment for heat exchange operation, and is widely applied to industrial departments of nuclear energy, chemistry, power, metallurgy and the like. Especially in the power circulation system of ships, submarines and aircrafts, the heat exchanger plays an important role in transferring and allocating energy between working media.
With the continuous improvement of the technological level, people pay more and more attention to the environmental friendliness of power systems in nuclear power stations, thermal power stations and aircraft engines, the improvement of efficiency, the reduction of cost and the consumption of natural resources are one of the future development directions in the field, and meanwhile, in order to enable the power systems to have the capacity of being suitable for various complex environments, miniaturization and modularization are the development targets of the power systems. The types of heat exchangers currently used in industrial applications mainly include shell-and-tube heat exchangers, plate-fin heat exchangers, and the like, which cannot simultaneously satisfy the requirements of large heat exchange specific surface area, high welding strength, and small volume. In recent years, with the improvement of the industrial manufacturing level, the micro-channel compact heat exchanger taking high-precision chemical etching and vacuum diffusion welding as the process core receives wide attention, and has the advantages of small flow channel size, high compactness, no welding slag in a welding mode, and obvious connection strength close to that of a base metal.
However, in the process of applying the microchannel compact heat exchanger, it is found that, due to the integral forming and processing of the heat exchanger, the flow heat transfer performance in a single flow channel is difficult to measure, only overall and inaccurate performance parameters can be obtained, and the design result and the actual test result have deviation.
Disclosure of Invention
In order to solve the problem that the flow heat transfer performance in a single flow channel is difficult to measure by integrally forming and processing the conventional micro-channel heat exchanger, the invention provides a modular micro-channel compact heat exchange experiment body. The invention is based on modular design, can measure the thermodynamic parameters in the microchannel, and provides data support for researching the microchannel heat exchanger and establishing a flowing heat transfer experiment database.
The invention is realized by the following technical scheme:
a compact heat transfer experiment body of modular microchannel includes:
the core body module is used for realizing that the fluid working medium flows through the runner to be detected and exchanges heat with the boundary module to finish the convective heat exchange process;
the boundary module is used for realizing that boundary working media flow through to provide different heat exchange boundary conditions for the core module so as to complete the performance measurement of the core module under different boundary conditions;
and the connecting assembly is used for compressing and fixing the core body module and the boundary module and guiding the working medium to enter and exit.
As a preferred embodiment, the core module of the present invention includes a sealing plate to be tested and a flow passage plate to be tested;
a plurality of temperature measuring grooves are processed on the sealing plate to be tested in a working medium flowing mode, and the depth of each temperature measuring groove does not exceed the thickness of the sealing plate to be tested;
a runner to be measured is processed on the runner plate to be measured along the flowing direction of the working medium, and the depth of the runner to be measured does not exceed the thickness of the runner plate to be measured;
and the sealing plate to be tested and the runner plate to be tested are provided with fixing holes and working medium inlets and outlets.
In a preferred embodiment, the upper surface and the lower surface of the runner plate to be measured are respectively overlapped with one sealing plate to be measured and welded into a whole, and one side of each of the two sealing plates to be measured, which is provided with the temperature measuring groove, is far away from the runner plate to be measured.
As a preferred embodiment, the end of the temperature measuring groove is arranged at the center of the sealing plate to be measured, the diameter of the cross section of the temperature measuring groove is 1-5mm, and the shape of the cross section is semicircular, rectangular or trapezoidal;
the diameter of the section of the flow channel to be detected is 1-5mm, and the section is semicircular, rectangular or trapezoidal;
the shape of the flow channel to be measured in the flowing direction of the working medium comprises a linear type, a fold line type, a streamline type or an S-fin type.
As a preferred embodiment, the boundary module of the present invention includes a boundary sealing plate, a boundary flow passage plate, and a compression sleeve;
a boundary flow channel is processed on the boundary flow channel plate, and the depth of the boundary flow channel does not exceed the thickness of the boundary flow channel plate;
working medium inlets and outlets are formed in the boundary sealing plate and the boundary runner plate;
the boundary sealing plate and the boundary runner plate are stacked and welded into a whole, and one side of the boundary runner plate with the boundary runner is in contact with the boundary sealing plate;
the four compressing sleeves are welded and fixed at four corners of the outer surface of the boundary sealing plate through bent metal rods with different heights, and two compressing sleeves in the diagonal direction are in a group and belong to the same height.
As a preferred embodiment, the boundary module of the present invention has a square shape as a whole, and the side length is equal to the width of the core module but less than the length of the core module;
the boundary modules cover the upper surface and the lower surface of the core body module, and two compression sleeves with different heights on two adjacent boundary modules are aligned with each other.
As a preferred embodiment, each of the boundary modules of the present invention can be rotatably installed at a predetermined angle to form different boundary conditions.
In a preferred embodiment, the boundary flow channel of the present invention has an interface diameter of 1 to 5mm and a cross-sectional shape of a semicircle, a rectangle or a trapezoid.
As a preferred embodiment, the connecting assembly of the present invention comprises a compression stud, a compression nut, a nipple and a hose;
the inlet and outlet holes of the core body module and the boundary module are welded with connecting pipes; connecting a plurality of boundary modules in sequence through hoses, and connecting the boundary modules in series in sequence through connecting pipes at an inlet and an outlet;
the compression studs penetrate through the boundary module and the core module, and compression nuts are screwed at two ends of the compression studs to compress and fix the boundary module and the core module.
In a second aspect, the invention provides a performance measurement method based on the modular microchannel compact heat exchange experiment body, which comprises the following steps:
arranging temperature sensors on the core body module and the boundary module, and arranging pressure sensors at inlet and outlet positions on two sides of the core body module fluid working medium and the boundary module boundary working medium;
putting the whole experiment body with the measuring sensor into a closed circulation loop and arranging a flowmeter;
after the loop is started and adjusted to reach the design working condition and be stable, the inlet and outlet temperatures, the operating pressure and the operating flow of the fluid working medium in the core body module, the metal wall surface temperatures at different positions along the way and the inlet and outlet temperatures of each boundary module are obtained through the measuring sensor;
and calculating the flow heat transfer characteristics of the experiment body along a plurality of positions according to the measured data.
As a preferred embodiment, the method of the present invention further comprises:
and the micro-channel heat exchange performance measurement under different boundary conditions is realized by adjusting the installation position of the boundary module.
In a third aspect, the invention provides a data processing method based on the modular microchannel compact heat exchange experimental body, which comprises the following steps:
acquiring inlet and outlet temperatures, operating pressures and operating flows of fluid working media in the core body module, metal wall surface temperatures at different positions along the way, and inlet and outlet temperatures of each boundary module;
according to the energy conservation of heat exchange between the fluids at two sides, calculating to obtain the outlet fluid temperature of the fluid working medium in the core module within the coverage range of the corresponding boundary module;
obtaining the on-way temperature distribution of the fluid in the core body module according to the inlet and outlet fluid problems of the fluid working medium in the core body module in the coverage range of the corresponding boundary module;
and calculating the convective heat transfer coefficients of a plurality of positions on the core body module along the way according to the along-way temperature distribution of the fluid in the core body module and the corresponding metal wall surface temperature.
In a fourth aspect, the present invention provides a computer device, which includes a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the data processing method when executing the computer program.
In a fifth aspect, the invention proposes a computer-readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, realizes the steps of the above-mentioned data processing method.
The invention has the following advantages and beneficial effects:
because the microchannels of the traditional microchannel compact heat exchange body are stacked in a large quantity, thermotechnical parameters such as the internal temperature and pressure of the microchannel cannot be measured, and the machining is complex. Compared with the experiment body provided by the invention, the experiment body not only can measure the temperature and the pressure in the microchannel, but also is convenient to process and assemble, and can provide different cooling boundaries, thereby improving the accuracy of measuring the heat exchange performance of the microchannel, expanding the measuring range and being widely suitable for the use environment of the microchannel heat exchanger.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic diagram of the parts of the experimental body according to the embodiment of the present invention.
FIG. 2 is an assembled cross-sectional view of an experimental body according to an embodiment of the present invention.
Fig. 3 is a schematic view of an embodiment of the present invention showing the boundary module and the core module after they are overlapped.
Reference numbers and corresponding part names in the figures:
1-a sealing plate to be tested, 2-a runner plate to be tested, 3-a boundary sealing plate, 4-a boundary runner plate, 5-a temperature measuring groove, 6-a runner to be tested, 7-a compression sleeve, 8-a boundary runner, 9-a compression stud, 10-a compression nut, 11-a connecting pipe and 12-a hose.
Detailed Description
Hereinafter, the term "including" or "may include" used in various embodiments of the present invention indicates the presence of the inventive function, operation, or element, and does not limit the addition of one or more functions, operations, or elements. Furthermore, as used in various embodiments of the present invention, the terms "comprises," "comprising," "includes," "including," "has," "having" and their derivatives are intended to mean that the specified features, numbers, steps, operations, elements, components, or combinations of the foregoing, are only meant to indicate that a particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as first excluding the existence of, or adding to the possibility of, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
In various embodiments of the invention, the expression "or" at least one of a or/and B "includes any or all combinations of the words listed simultaneously. For example, the expression "a or B" or "at least one of a or/and B" may include a, may include B, or may include both a and B.
Expressions (such as "first", "second", and the like) used in various embodiments of the present invention may modify various constituent elements in various embodiments, but may not limit the respective constituent elements. For example, the above description does not limit the order and/or importance of the elements described. The foregoing description is for the purpose of distinguishing one element from another. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present invention.
It should be noted that: if it is described that one constituent element is "connected" to another constituent element, the first constituent element may be directly connected to the second constituent element, and a third constituent element may be "connected" between the first constituent element and the second constituent element. In contrast, when one constituent element is "directly connected" to another constituent element, it is understood that there is no third constituent element between the first constituent element and the second constituent element.
The terminology used in the various embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the invention. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and the accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not used as limiting the present invention.
Example (b):
the traditional micro-channel heat exchanger can only obtain integral heat transfer performance parameters due to integral forming processing, cannot measure the flowing heat transfer performance in the micro-channel inside the traditional micro-channel heat exchanger, and cannot provide an accurate and reliable heat transfer performance result for the design of the heat exchanger. To this end, an embodiment of the present invention provides a modular microchannel compact heat exchange experimental body, where the experimental body includes:
and the core body module is used for realizing that the fluid working medium flows through the micro-channel and exchanges heat with the boundary module to finish the convective heat exchange process.
And the boundary module is used for providing different heat exchange boundary conditions for the core module so as to finish the performance measurement of the core module under different conditions.
And the connecting assembly compresses and fixes all modules of the experiment body, prevents measurement results and normal operation from being influenced by shaking and air entering the modules, and connects the inlet and outlet of the fluid working medium.
The working principle of the experiment body provided by the embodiment of the invention is as follows: the core body module and the boundary module complete a flowing heat exchange process, a fluid working medium flows in a micro-channel with a specific structure, and a boundary working medium flows in the boundary module, so that heat exchange is carried out between the fluid working medium and the boundary working medium; realize the fixed connection of each module of whole experiment body through coupling assembling to realize guaranteeing the steady operation of experiment body after the dismouting transformation. The embodiment of the invention utilizes a modular design principle, is convenient for disassembly, assembly and transformation, and can realize accurate measurement of heat transfer performance parameters (flow channel temperature, pressure, flow and the like) in the micro-channel.
Specifically, as shown in fig. 1, the core module according to the embodiment of the present invention includes a sealing plate 1 to be tested, a runner plate 2 to be tested, a temperature measuring tank 5, and a runner 6 to be tested. The temperature measuring groove 5 is obtained on the sealing plate 1 to be measured through machining (such as turn milling) or chemical etching or photoetching, the runner plate 2 to be measured is processed through machining (such as turn milling) or chemical etching or photoetching, the runner 6 to be measured to be researched is obtained, and the depths of the temperature measuring groove 5 and the runner 6 to be measured do not exceed the corresponding plate thicknesses. Through holes are processed on the peripheries of the sealing plate 1 to be tested and the runner plate 2 to be tested so as to fix the compression studs 9. Through holes are processed at two ends of the sealing plate 1 to be tested so that a fluid working medium can enter and exit, and holes with the same depth as the flow channel 6 to be tested are processed at corresponding positions of the flow channel plate 2 to be tested so as to form a fluid working medium inlet/outlet a/A of the core module. In this embodiment, the sealing plate 1 to be measured and the flow channel plate 2 to be measured have the same shape and size and are both rectangular structures.
The core module of the embodiment of the invention is integrally stacked according to the sequence of the sealing plate 1 to be tested, the runner plate 2 to be tested and the sealing plate 1 to be tested, and ensures that the temperature measuring groove 5 is not contacted with the runner 6 to be tested (namely, the side of the sealing plate 1 to be tested, which is provided with the temperature measuring groove 5, is far away from the runner plate 2 to be tested), and finally, as shown in fig. 2, a plurality of plates are welded into a whole by using, but not limited to, high-temperature vacuum diffusion welding, vacuum brazing, fusion welding and other modes.
Further, the length of the temperature measuring groove 5 in the embodiment of the present invention is about half of the width of the sealing plate 1 to be measured, that is, the end of the temperature measuring groove is near the center of the sealing plate 1 to be measured, the diameter of the cross section of the temperature measuring groove is about 1-5mm, and the shape of the cross section includes but is not limited to a semicircular shape, a rectangular shape, or a trapezoidal shape.
Further, the cross-sectional diameters of the flow channel 6 to be measured and the boundary flow channel 8 in the embodiment of the invention are about 1-5mm, and the cross-sectional shapes include but are not limited to geometric shapes such as a semicircle, a rectangle, a trapezoid and the like; the shape of the flow channel 6 to be measured in the flow direction comprises a linear type, a fold line type and other continuous flow channels or a streamline type, S-fin type and other discontinuous flow channels.
The boundary module of the embodiment of the invention comprises a boundary sealing plate 3, a boundary runner plate 4, a compression sleeve 7 and a boundary runner 8. The boundary runner plate 4 is processed by mechanical processing (such as turning and milling) or chemical etching or photoetching to obtain a boundary runner 8, the depth of the boundary runner 8 does not exceed the thickness of the boundary runner plate 4, the boundary sealing plate 3 is provided with a through hole which is used as a boundary working medium inlet/outlet, meanwhile, a hole with the depth equal to that of the boundary runner 8 is arranged at the corresponding position of the boundary runner plate 4 to form a working medium inlet/outlet (B/B) of a boundary module, the boundary sealing plate 3 and the boundary runner plate 4 are stacked together and the boundary runner is inward (namely, the side of the boundary runner plate 4 with the boundary runner 8 is contacted with the boundary sealing plate 3), and the boundary runner plate 4 is welded into a whole by adopting a mode of, but not limited to high-temperature vacuum diffusion welding, vacuum brazing, fusion welding and the like.
The 4 compression sleeves 7 of the embodiment of the invention are welded and fixed at four corners of the outer surface of the boundary sealing plate 3 through two bent metal rods (or rigid structures such as straight rods, curved rods and fins) with different heights, wherein the two compression sleeves in the diagonal direction form a group and belong to a high position or a low position; four compression sleeves 7 outside four corners of each boundary module are in an X shape in plan view, and two compression sleeves with two heights are just connected end to end.
In the embodiment of the invention, the boundary module is integrally square, and the side length is equal to the width of the flow channel to be detected and is less than the length of the flow channel to be detected. A plurality of boundary modules are covered on the upper surface and the lower surface of the core body module, and a high compression sleeve 7 and a low compression sleeve 7 on two adjacent boundary modules are aligned with each other. If the boundary module is larger than one, the inlet and the outlet of the added boundary runner plate are through holes so as to increase the heat exchange capability of the boundary.
The connecting assembly of the embodiment of the invention comprises a compression stud 9, a compression nut 10, a connecting pipe 11 and a hose 12. Wherein, the double ends of the hold-down studs 9 are provided with threads, the length is larger than or equal to the height of the whole experiment body (namely the length of four hold-down sleeves and the thickness of one core module, as shown in fig. 2), the hold-down studs 9 are passed through the aligned hold-down sleeves, namely one hold-down stud 9 is passed through the four hold-down sleeves and one core module, as shown in fig. 2, then the hold-down nuts 10 are used for screwing at the two ends of the hold-down studs 9, and the two sides are pressurized to ensure that the core module is fully contacted with the boundary module. The compression stud and the compression nut of the embodiment of the invention are made of metal materials such as stainless steel, iron alloy, titanium alloy and the like.
Connecting pipes 11 are welded on inlet and outlet holes of the core body module and the boundary module, and the inlet and outlet connecting pipes 11 on the plurality of boundary modules are sequentially connected through hoses 12, so that the plurality of boundary modules are sequentially connected in series. The hose 12 of the present embodiment is made of flexible materials such as, but not limited to, rubber, teflon, etc.
Further, the material of the sealing plate to be measured 1, the material of the flow channel plate to be measured 2, the material of the boundary sealing plate 3, and the material of the boundary flow channel plate 4 in the embodiment of the present invention are the same, and the materials may be, but not limited to, stainless steel, iron alloy, titanium alloy, and other metal materials. Based on the experiment body that this embodiment provided, can carry out microchannel heat transfer performance under the different boundary conditions and measure, specifically do: one boundary module can be installed by rotating 90 degrees without any influence, the boundary conditions can be changed by different forms, when the flow channel in the boundary module is parallel to the flow channel to be detected, the boundary module is a downstream or inverse transformation thermal boundary, and when the flow channel in the boundary module is vertical to the flow channel to be detected, the boundary module is a cross-flow heat exchange boundary. Therefore, the installation position of the boundary module is adjusted, so that the flow channel in the boundary module and the flow channel to be measured are positioned under a certain boundary condition, and the micro-channel heat exchange performance measurement under different boundary conditions can be carried out.
Based on the experiment body that this embodiment provided, carry out microchannel heat transfer performance measurement, specifically include the following step:
first, the assembly of the experimental body was completed. And then, arranging temperature sensors in the inlet and outlet connecting pipes of the core body module, the inlet and outlet connecting pipes of each boundary module and the temperature measuring tank 5, arranging pressure sensors at inlet positions on two sides of the fluid working medium and the boundary working medium of the experiment body, and integrally placing the experiment body with the measuring sensors into a closed circulation loop and arranging a flowmeter.
After the loop is started and each control instrument is adjusted to achieve the designed working condition and stability, the inlet and outlet temperature, the operating pressure and the operating flow of the fluid working medium in the core module and the metal wall surface temperature at the temperature measuring groove along the way (namely along the flowing direction of the working medium of the core module) can be obtained through the measuring instruments (namely each sensor), and the inlet and outlet temperature of each boundary module can be obtained at the same time.
And finally, calculating the fluid temperature of the core body module at the inlet and outlet positions of each boundary module by using energy conservation, calculating the wall surface temperature of the fluid working medium at the same position by using a heat conduction principle, calculating the convection heat transfer coefficient of the position by using a convection heat transfer formula, and obtaining the flowing heat transfer characteristics of the heat transfer experiment body at a plurality of positions along the way by using the same principle.
Specifically, as shown in fig. 3, the following temperature can be measured, where t and t' are the boundary working fluid temperature at the inlet and outlet positions of the boundary module, and t w1 And t w2 Is the metal wall temperature, t, of a thermocouple arranged on the temperature measuring tank 5 b And t b The' respectively are the fluid working medium in the core module and the inlet and outlet fluid temperature in the coverage range of the corresponding boundary module. The calculation method is as follows:
t b the inlet temperature calculated from the energy conservation for the last boundary module is known. At this time, after measuring t and t', the energy conservation according to the heat exchange between the fluids on both sides, i.e.
Wherein cp 1 And cp 2 The specific heat capacities of boundary working medium and core working medium are known, m 1 And m 2 The mass flow rates of the boundary working medium and the core working medium belong to measured values respectively, and t can be calculated according to the measured values b '。
Then according to t b And t b ', canThe on-way temperature distribution of the fluid in the core module is obtained (basically, the fluid temperature is linearly distributed along the flow direction), so that t can be obtained w1 And t w2 Core working medium fluid temperature t at corresponding position b1 And t b2 。
Meanwhile, the heat exchange heat flow density q corresponding to one boundary module can be obtained by dividing the heat exchange quantity by the heat exchange area, and the specific formula is as follows:
the numerator is the heat exchange quantity of fluid at two sides, is known, and the denominator is the heat exchange area S covered by one boundary module.
The convective heat transfer coefficient h is calculated as follows:
at this time, the heat flux q is known, and the wall temperatures t at two positions w And the temperature t of the fluid b The method can obtain the convection heat transfer coefficient h of the two positions, and by analogy, the convection heat transfer characteristic of the 5 position of each temperature measuring groove on the heat exchange core body can be obtained, and the performance measurement of multiple positions of the micro-channel compact heat exchange experiment body to be measured can be completed.
The present embodiment also proposes a computer device for executing the above-mentioned convective heat transfer characteristic calculation process of the present embodiment.
The computer equipment comprises a processor, an internal memory and a system bus; various device components including internal memory and processors are connected to the system bus. A processor is hardware used to execute computer program instructions through basic arithmetic and logical operations in a computer system. An internal memory is a physical device used to temporarily or permanently store computing programs or data (e.g., program state information). The system bus may be any of several types of bus structures including a memory bus or memory controller, a peripheral bus, and a local bus. The processor and the internal memory may be in data communication via a system bus. Including read-only memory (ROM) or flash memory (not shown), and Random Access Memory (RAM), which typically refers to main memory loaded with an operating system and computer programs.
Computer devices typically include an external storage device. The external storage device may be selected from a variety of computer-readable media, which refers to any available media that can be accessed by the computing device, including both mobile and fixed media. For example, computer-readable media includes, but is not limited to, flash memory (micro SD cards), CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer device.
A computer device may be logically connected in a network environment to one or more network terminals. The network terminal may be a personal computer, a server, a router, a smartphone, a tablet, or other common network node. The computer device is connected to the network terminal through a network interface (local area network LAN interface). A Local Area Network (LAN) refers to a computer network formed by interconnecting within a limited area, such as a home, a school, a computer lab, or an office building using a network medium. WiFi and twisted pair wiring ethernet are the two most commonly used technologies to build local area networks.
It should be noted that other computer systems including more or less subsystems than computer devices can also be suitable for use with the invention.
As described above in detail, the computer device adapted to the present embodiment can perform the specified operation of the convection heat transfer characteristics calculation process. The computer device performs these operations in the form of software instructions executed by a processor in a computer-readable medium. These software instructions may be read into memory from a storage device or from another device via a local area network interface. The software instructions stored in the memory cause the processor to perform the method of processing group membership information described above. Furthermore, the present invention can be implemented by hardware circuits or by a combination of hardware circuits and software instructions. Thus, implementation of the present embodiments is not limited to any specific combination of hardware circuitry and software.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (14)
1. The utility model provides a compact heat transfer experiment body of modular microchannel which characterized in that includes:
the core body module is used for realizing that the fluid working medium flows through the runner to be detected and exchanges heat with the boundary module to finish the convective heat exchange process;
the boundary module is used for realizing that boundary working media flow through to provide different heat exchange boundary conditions for the core module so as to complete the performance measurement of the core module under different boundary conditions;
and the connecting assembly is used for compressing and fixing the core body module and the boundary module and guiding the working medium to enter and exit.
2. The modular microchannel compact heat exchange experimental body according to claim 1, wherein the core module comprises a sealing plate to be tested and a runner plate to be tested;
a plurality of temperature measuring grooves are processed on the sealing plate to be tested in a working medium flowing mode, and the depth of each temperature measuring groove does not exceed the thickness of the sealing plate to be tested;
a runner to be measured is processed on the runner plate to be measured along the flowing direction of the working medium, and the depth of the runner to be measured does not exceed the thickness of the runner plate to be measured;
and the sealing plate to be tested and the runner plate to be tested are provided with fixing holes and working medium inlets and outlets.
3. The modular microchannel compact heat exchange experimental body as claimed in claim 2, wherein one sealing plate to be tested is stacked on each of the upper and lower surfaces of the flow channel plate to be tested and welded together, and one side of the two sealing plates to be tested, which is provided with the temperature measuring groove, is far away from the flow channel plate to be tested.
4. The compact heat exchange experimental body of a modular microchannel as claimed in claim 2, wherein the end of the temperature measuring groove is at the center of the sealing plate to be tested, the diameter of the cross section of the temperature measuring groove is 1-5mm, and the shape of the cross section is semicircular, rectangular or trapezoidal;
the diameter of the section of the flow channel to be measured is 1-5mm, and the section is semicircular, rectangular or trapezoidal;
the shape of the flow channel to be measured in the flowing direction of the working medium comprises a linear type, a fold line type, a streamline type or an S-fin type.
5. The compact heat exchange experimental body of modular microchannel of claim 1, wherein the boundary module comprises a boundary sealing plate, a boundary flow channel plate and a compression sleeve;
a boundary flow channel is processed on the boundary flow channel plate, and the depth of the boundary flow channel does not exceed the thickness of the boundary flow channel plate;
working medium inlets and outlets are formed in the boundary sealing plate and the boundary runner plate;
the boundary sealing plate and the boundary runner plate are stacked and welded into a whole, and one side of the boundary runner plate with the boundary runner is in contact with the boundary sealing plate;
the four compressing sleeves are welded and fixed at four corners of the outer surface of the boundary sealing plate through bent metal rods with different heights, and two compressing sleeves in the diagonal direction are in a group and belong to the same height.
6. The compact heat exchange experimental body of claim 5, wherein the boundary module is square in shape, and has a side length equal to the width of the core module but less than the length of the core module;
the boundary modules cover the upper surface and the lower surface of the core body module, and two compression sleeves with different heights on two adjacent boundary modules are aligned with each other.
7. The compact heat exchange experimental body of the modular micro-channel of claim 5,
each of the boundary modules can be rotatably installed at a predetermined angle to form different boundary conditions.
8. The compact heat exchange experimental body of the modular micro-channel of claim 5,
the interface diameter of the boundary flow channel is 1-5mm, and the cross section is semicircular, rectangular or trapezoidal.
9. The compact heat exchange experimental body of modular microchannel of claim 5, wherein the connection assembly comprises a hold-down stud, a hold-down nut, a connection pipe and a hose;
the inlet and outlet holes of the core body module and the boundary module are welded with connecting pipes; connecting a plurality of boundary modules in sequence through hoses, and connecting the boundary modules in series in sequence through connecting pipes at an inlet and an outlet;
the compression studs penetrate through the boundary module and the core module, and compression nuts are screwed at two ends of the compression studs to compress and fix the boundary module and the core module.
10. The performance measurement method of the modular microchannel compact heat exchange experiment body based on any one of claims 1 to 9, is characterized by comprising the following steps:
arranging temperature sensors on the core body module and the boundary module, and arranging pressure sensors at inlet and outlet positions on two sides of the core body module fluid working medium and the boundary module boundary working medium;
putting the whole experiment body with the measuring sensor into a closed circulation loop and arranging a flowmeter;
after the loop is started and adjusted to reach the design working condition and be stable, the inlet and outlet temperatures, the operating pressure and the operating flow of the fluid working medium in the core body module, the metal wall surface temperatures at different positions along the way and the inlet and outlet temperatures of each boundary module are obtained through the measuring sensor;
and calculating to obtain the flow heat transfer characteristics of the experiment body along multiple positions according to the measured data.
11. The performance measurement method of claim 10, further comprising:
and the micro-channel heat exchange performance measurement under different boundary conditions is realized by adjusting the mounting position of the boundary module.
12. The data processing method of the modular microchannel compact heat exchange experiment body based on any one of claims 1 to 9, is characterized by comprising the following steps:
acquiring inlet and outlet temperatures, operating pressures and operating flows of fluid working mediums in the core module, metal wall surface temperatures at different positions along the way, and inlet and outlet temperatures of each boundary module;
according to the energy conservation of heat exchange between the fluids at two sides, calculating to obtain the outlet fluid temperature of the fluid working medium in the core module within the coverage range of the corresponding boundary module;
obtaining the on-way temperature distribution of the fluid in the core body module according to the inlet and outlet fluid problems of the fluid working medium in the core body module in the coverage range of the corresponding boundary module;
and calculating the convective heat transfer coefficients of a plurality of positions on the core body module along the way according to the along-way temperature distribution of the fluid in the core body module and the corresponding metal wall surface temperature.
13. A computer arrangement comprising a memory and a processor, the memory storing a computer program, characterized in that the processor realizes the steps of the data processing method of claim 12 when executing the computer program.
14. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the data processing method of claim 12.
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