CN115876834A - Testing device and testing method for performance evaluation of corrugated ribbon heat transfer device - Google Patents
Testing device and testing method for performance evaluation of corrugated ribbon heat transfer device Download PDFInfo
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- CN115876834A CN115876834A CN202211520660.3A CN202211520660A CN115876834A CN 115876834 A CN115876834 A CN 115876834A CN 202211520660 A CN202211520660 A CN 202211520660A CN 115876834 A CN115876834 A CN 115876834A
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- 238000012546 transfer Methods 0.000 title claims abstract description 109
- 238000012360 testing method Methods 0.000 title claims abstract description 45
- 238000011156 evaluation Methods 0.000 title claims description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 72
- 238000001816 cooling Methods 0.000 claims abstract description 63
- 238000010521 absorption reaction Methods 0.000 claims abstract description 51
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000010998 test method Methods 0.000 claims description 9
- 239000012790 adhesive layer Substances 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 238000005457 optimization Methods 0.000 abstract description 5
- 238000004804 winding Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 239000002969 artificial stone Substances 0.000 description 2
- 239000010454 slate Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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Abstract
The invention relates to a testing device and a testing method for evaluating the performance of a corrugated strip heat transfer device, which comprises a fixing unit, a testing unit and a control unit, wherein the fixing unit is used for fixing the corrugated strip heat transfer device to be tested; the heating unit is attached to the heat absorption end of the corrugated strip heat transfer device and used for heating the heat absorption end; the cooling unit is attached to the heat release end of the corrugated strip-shaped heat transfer device and used for cooling the heat release end; the detection unit is respectively positioned on one side of the heat absorption end and one side of the heat release end and is used for measuring the temperature of the heat absorption end and the heat release end; and the display unit is electrically connected with the detection unit and is used for displaying the temperature of the heat absorption end and the heat release end. The invention can obtain the heat transfer performance parameters of the corrugated ribbon heat transfer device and provide data support for the optimization and the update of the heat transfer device.
Description
Technical Field
The invention relates to the technical field of performance test of heat transfer devices, in particular to a test device and a test method for performance evaluation of a corrugated strip-shaped heat transfer device.
Background
The serious heating of the motor overhanging part winding is a main reason for limiting the further improvement of the motor power, and the heat dissipation scheme of adopting the corrugated ribbon-shaped phase change heat transfer device to be matched with the heat conduction glue to wrap the overhanging part winding is an effective way for realizing the efficient heat dissipation of the motor. However, due to the current lack of suitable performance evaluation testing devices and methods for heat transfer devices in the form of corrugated ribbons, data support for heat transfer device optimization and updating is not provided, thus resulting in slow device update iterations.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a testing device and a testing method for evaluating the performance of a corrugated ribbon heat transfer device, which can obtain the heat transfer performance parameters of the corrugated ribbon heat transfer device and provide data support for optimization and updating of the heat transfer device.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a testing device for evaluating performance of a corrugated belt phase-change heat transfer device, which comprises a fixing unit, a phase-change unit and a phase-change unit, wherein the fixing unit is used for fixing a corrugated belt-shaped heat transfer device to be tested; the heating unit is attached to the heat absorption end of the corrugated strip heat transfer device and used for heating the heat absorption end; a cooling unit attached to a heat releasing end of the corrugated band-shaped heat transfer device for cooling the heat releasing end; the detection unit is respectively positioned on one side of the heat absorption end and one side of the heat release end and is used for measuring the temperature of the heat absorption end and the heat release end; and the display unit is electrically connected with the detection unit and is used for displaying the temperature of the heat absorption end and the heat release end.
The invention preferably adopts the technical scheme that the test device further comprises a test bench, the test bench is provided with an accommodating area for accommodating the heating unit, the cooling unit and the detection unit, and the heating unit, the cooling unit and the detection unit are positioned in the test bench.
The heating unit comprises a heating block and a heating rod for heating by electrifying, a heating hole for inserting the heating rod is formed in the heating block, a heat-conducting adhesive layer is arranged in the heating hole, and one surface of the heating block is attached to the heat absorption end.
The invention has the preferable technical scheme that the cooling unit comprises a liquid cooling plate and a constant temperature water tank, the liquid cooling plate is connected with the constant temperature water tank through a pipeline, and one surface of the liquid cooling plate is attached to the heat release end.
The invention has the preferable technical scheme that the detection unit is a K-type thermocouple, and the display unit is a computer.
The invention provides a test method for evaluating performance of a corrugated belt phase change heat transfer device, which comprises the following steps of:
s00: measuring the equivalent heat transfer length L and the effective cross-sectional area A of the corrugated ribbon heat transfer device, and fixing the corrugated ribbon heat transfer device;
s10: heating the heat absorption end of the corrugated ribbon heat transfer device by adopting a heating unit with constant power P, and cooling the heat release end of the corrugated ribbon heat transfer device by adopting a cooling unit with cooling temperature T;
s20: measuring the temperature of the heat absorption end and the heat release end;
s30: after the temperature changes of the heat absorption end and the heat release end are stable, recording the temperatures of the heat absorption end and the heat release end after the temperature changes are stable, and calculating the temperature difference delta T;
s40: the heat transfer coefficient K of the corrugated ribbon heat transfer device at constant power P is obtained according to the formula (constant power P × equivalent heat transfer length L)/(effective cross-sectional area a × temperature difference Δ T).
The invention preferably adopts the technical scheme that in S10, the constant power P is 25-60W, and the cooling temperature T is 30-50 ℃.
The invention preferably adopts the technical scheme that in S20, the time for stabilizing the temperature change is 5-15min.
The invention preferably adopts the technical scheme that in S10, heat-conducting glue is coated between the heating unit and the heat absorption end and between the cooling unit and the heat release end. The invention also provides another testing method for evaluating the performance of the corrugated belt phase change heat transfer device, which comprises the following steps of:
s00: fixing the corrugated ribbon heat transfer device;
s10: cooling the heat release end of the corrugated ribbon heat transfer device by adopting a cooling unit with a cooling temperature T, heating the heat absorption end of the corrugated ribbon heat transfer device by adopting a heating unit, wherein the power value of the heating unit is P;
s20: measuring the temperature of the heat absorption end and the heat release end, and gradually increasing the power value after the temperature change of the heat absorption end and the heat release end is stable until the temperature of the heat absorption end and the heat release end can not reach the stability;
s30: recording the power value P at the moment to obtain the limit heat transfer power P of the corrugated belt-shaped heat transfer device at the cooling temperature T max 。
The invention has the beneficial effects that:
the invention provides a testing device and a testing method for evaluating the performance of a corrugated ribbon heat transfer device, wherein the testing device is provided with a heating unit and a cooling unit which are closely attached to a heat absorption end and a heat release end of the corrugated ribbon heat transfer device, and a detection unit which is respectively positioned at one side of the heat absorption end and one side of the heat release end and is used for detecting the temperature is used for outputting the detected temperature data to a display unit, so that the parameters such as the heat transfer coefficient, the limit heat transfer power and the like of the corrugated ribbon heat transfer device can be obtained through formula calculation, the accurate test of the heat transfer performance of the corrugated ribbon heat transfer device is realized, and data support is provided for the optimization and the update of the heat transfer device. Besides, the invention also has the following advantages: 1. the device is simple and easy to process, and various components are low in price and convenient to realize; 2. the operation is simple, convenient and practical; 3, the structure is simple, and the assembly requirement is not high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a perspective view of a corrugated ribbon heat transfer device of a first embodiment; FIG. 2 is a schematic structural view of a test apparatus for evaluating performance of a corrugated strip heat transfer device according to a first embodiment;
FIG. 3 is a perspective view of a testing table according to the first embodiment;
FIG. 4 is a front view of the testing table according to the first embodiment;
FIG. 5 is a schematic diagram of a method of testing the heat transfer coefficient K of the first embodiment;
FIG. 6 is a schematic diagram of a method for testing the limit heat transfer power according to the first embodiment;
fig. 7 is a schematic diagram of the temperature change of the testing method of the limit heat transfer power according to the first embodiment.
In the figure:
1-a stationary unit; 11-adding slate; 12-lower slate; 2-a heating unit; 21-heating block; 22-a heating rod; 3-a cooling unit; 31-liquid cold plate; 32-constant temperature water tank; 4-a detection unit; 5-a display unit; 61-a heat sink end; 62-heat release end.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Example one
As shown in fig. 1, a corrugated ribbon heat transfer device is used as a novel heat transfer device, one of the purposes of the corrugated ribbon heat transfer device is used for heat dissipation of a motor, one end of the corrugated ribbon heat transfer device is a heat absorption end 61 and is tightly attached to an overhanging winding in the motor, the other end of the corrugated ribbon heat transfer device is a heat dissipation end 62 and is tightly attached to a housing of the motor, and a plurality of corrugated ribbon heat transfer devices are arranged according to the size and the requirement of the motor so as to surround the overhanging winding. This technical scheme leads the produced concentrated heat of overhang winding to the shell of motor in through addding extra heat transfer path fast, makes its thermal radiating efficiency higher to prevent that the heat from piling up in the overhang winding, thereby make the power of motor can further promote. The corrugated ribbon-shaped heat transfer device in this embodiment is a phase-change heat transfer device, and can have higher heat transfer efficiency.
As shown in fig. 2 to 4, in the testing apparatus for evaluating performance of a corrugated strip heat transfer device provided in this embodiment, both the pipeline and the electrical connection circuit in the testing apparatus are shown in fig. 4 by line connection, in order to better integrate each unit of the apparatus, a testing table is provided in the testing apparatus, the testing table is provided with an accommodating area for accommodating the heating unit 2, the cooling unit 3, and the detecting unit 4, and the fixing unit 1, the heating unit 2, the cooling unit 3, and the detecting unit 4 are located in the testing table. By integrating each unit, the integration of the device is facilitated, and the use and the measurement are convenient.
The test bench is manufactured from a synthetic stone slab, the fixing unit 1 is formed by clamping an upper stone slab 11 and a lower stone slab 12, and since the thermal conductivity of the synthetic stone slab is only 0.25W/m.k, it can be assumed approximately that all the heat generated by the heating unit is transferred to the corrugated strip-shaped heat transfer element.
The fixing unit 1 is used for fixing a to-be-detected corrugated strip heat transfer device, and the clamping structure of the fixing unit is matched with the to-be-detected corrugated strip heat transfer device; the heating unit 2 is tightly attached to the heat absorption end of the corrugated ribbon heat transfer device and used for heating the heat absorption end; the cooling unit 3, the cooling unit 3 is clung to the exothermic end of the heat transfer device of the corrugated strip shape and is used for cooling the exothermic end; the detection unit 4 is respectively positioned on one side of the heat absorption end and one side of the heat release end and is used for measuring the temperature of the heat absorption end and the heat release end, and the display unit 5, the display unit 5 and the detection unit 4 are electrically connected and are used for displaying the temperature of the heat absorption end and the heat release end. In this embodiment, the number of the heat absorbing ends is three, and the number of the heat releasing ends is two. Accordingly, three heating units, two cooling units and five detection units are provided, respectively.
Specifically, the heating unit 2 includes a heating block 21 and a heating rod 22 for heating by energization, the heating block 21 is embedded in the accommodating area of the test table, a heating hole for inserting the heating rod 22 is formed in the heating block 21, a heat conducting adhesive layer is arranged in the heating hole, and one surface of the heating block 21 is attached to the heat absorbing end. The structure is arranged to be beneficial to quickly transferring the heat energy generated by the heating rod to the heat absorption end so as to ensure the accuracy of data measurement.
Specifically, the cooling unit 3 includes a liquid cooling plate 31 and a constant temperature water tank 32, the liquid cooling plate 31 is embedded in the accommodating area of the test board, the liquid cooling plate 31 and the constant temperature water tank 32 are connected by a pipeline, and one surface of the liquid cooling plate 31 is attached to the heat releasing end. The water inlet of the liquid cooling plate is connected with the water pump through a hose, the water pump is connected with the constant temperature water tank through a hose, the water pump provides power for the liquid cooling working medium loop, and the water outlet of the liquid cooling plate is connected with the hose and extends to the constant temperature water tank. The liquid cooling plate, the water pump and the constant temperature water tank jointly form a liquid cooling working medium loop. The structure is beneficial to the liquid cooling plate to quickly take away heat at the heat release end so as to ensure the accuracy of data measurement.
Specifically, the detection unit 4 is a K-type thermocouple, and the display unit 5 is a computer. The K-type thermocouple has the advantages of good linearity, larger thermoelectromotive force, high sensitivity, better stability and uniformity, strong oxidation resistance, low price and the like, and is very suitable for rapidly detecting the temperature change conditions of a heat absorption end and a heat release end. The K-type thermocouple is connected with the data acquisition card, the data acquisition card is connected with the computer, the K-type thermocouple detects the temperature of each point on the heat transfer device in real time and transmits the data to the computer, and required parameters can be obtained through computer operation.
As shown in fig. 5, the specific test method is as follows:
s00: measuring an equivalent heat transfer length L and an effective cross-sectional area A of the corrugated ribbon-shaped heat transfer device by using a vernier caliper, wherein the equivalent heat transfer length L is the shortest distance from a heat absorption end to a heat release end through the heat transfer device, and the measured values are respectively as follows: equivalent heat transfer length L =120mm; the effective cross-sectional area A is 25mm x 0.98mm =24.5mm 2 After measurement, the corrugated belt-shaped heat transfer device is fixed on the fixing unit,
s10: in S10, the constant power P is 25-60W, the cooling temperature T is 30-50 ℃, in the embodiment, P is 45W, T is 50 ℃, and the numerical value is adopted so as to simulate the practical motor application environment.
S20: measuring the temperature of the heat absorption end and the heat release end;
s30: the temperature changes of the heat absorption end and the heat release end are gradually stabilized after the device runs for 8min, the temperatures of the heat absorption end and the heat release end after stabilization are recorded, the average values are taken, the numerical values are that the temperature of the heat absorption end is 59.35 ℃, the temperature of the heat release end is 54.12 ℃, and the temperature difference delta T =5.23 ℃ is calculated;
s40: according to a formula (constant power P equivalent heat transfer length L)/(effective cross section area A temperature difference delta T), the values are substituted to obtain the heat transfer coefficient K of the corrugated ribbon heat transfer device under the constant power P, namely (45W 120mm 1000)/(24.5 mm) 2 *5.23℃)＝42143W/m·℃。
The testing method is used for simulating the actual application environment of the corrugated ribbon heat transfer device, can perform research and development tests according to the actual application requirements, and can provide data support for optimization and updating of the heat transfer device.
Preferably, in order to make heat in S10, heat conductive paste is applied between the heating unit 2 and the heat absorbing end, and between the cooling unit 3 and the heat discharging end. The heat-conducting glue can improve the heat transfer effect so as to further simulate the actual use process and play a role in fixing.
In addition to the above-described measurement of the heat transfer coefficient K of the corrugated ribbon heat transfer device at constant power, the limit heat transfer power was further measured. As shown in fig. 6-7, the specific method is as follows:
the cooling temperature of the fixed cooling unit is 50 ℃, the heating power of the heating unit is 15W at the beginning, after the temperature change of the heat absorption end and the heat release end is stabilized under the power, the heating power of the heating unit is gradually increased, the heating power is gradually increased according to the range of 10 ℃ at the interval of 15W, 25W and 35W until the temperature of the heat absorption end and the heat release end cannot be stabilized with time, the power value at the moment is 85W, and the limit heat transfer power P of the corrugated belt-shaped heat transfer device at the cooling temperature of 50 ℃ can be obtained max Between about 75 and 85W, it is believed that: when the corrugated ribbon heat transfer device is used at the external cooling temperature of 50 ℃ and the overhang winding transfers no more than 75W to the heat transfer component, the overhang winding can stably dissipate heat,the motor cannot be out of control due to the accumulation of heat. In addition, P can also be determined by gradually narrowing the range of 75-85W max The exact value of (c).
It should be added that, in the device according to the above technical solution, in addition to the constant power heating by the heating unit, the constant temperature heating by the heating unit may also be performed according to the actual application, and conversely, in the same way, the constant power cooling by the cooling unit may also be performed according to the actual application. By different adjustments, different heat transfer parameters can be obtained for development according to the needs of the user, not only the above heat transfer coefficient and the limit heat transfer power. The above uses are all in the scope of use of the measuring device.
While the invention has been described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.
Claims (10)
1. A test device for evaluating the performance of a corrugated ribbon heat transfer device is characterized by comprising:
a fixing unit for fixing a corrugated strip heat transfer device to be tested;
the heating unit is attached to the heat absorption end of the corrugated ribbon heat transfer device and used for heating the heat absorption end;
the cooling unit is attached to the heat release end of the corrugated ribbon-shaped heat transfer device and used for cooling the heat release end;
the detection unit is respectively positioned on one side of the heat absorption end and one side of the heat release end and is used for measuring the temperature of the heat absorption end and the heat release end;
and the display unit is electrically connected with the detection unit and is used for displaying the temperatures of the heat absorption end and the heat release end.
2. The test device of claim 1, wherein:
the test bed is also included;
the test bench is provided with an accommodating area for accommodating the heating unit, the cooling unit and the detection unit;
the heating unit, the cooling unit and the detection unit are positioned in the test bench.
3. The test device of claim 1, wherein:
the heating unit comprises a heating block and a heating rod for electrifying and heating;
a heating hole for inserting the heating rod is formed in the heating block, and a heat-conducting adhesive layer is arranged in the heating hole;
one surface of the heating block is attached to the heat absorption end.
4. The test device of claim 1, wherein:
the cooling unit comprises a liquid cooling plate and a constant-temperature water tank;
the liquid cooling plate is connected with the constant-temperature water tank through a pipeline, and one surface of the liquid cooling plate is attached to the heat release end.
5. The test device of claim 1, wherein:
the detection unit is a K-type thermocouple, and the display unit is a computer.
6. A test method for performance evaluation of a corrugated ribbon heat transfer device is characterized by comprising the following steps:
s00: measuring the equivalent heat transfer length L and the effective cross-sectional area A of the corrugated belt-shaped heat transfer device, and fixing the corrugated belt-shaped heat transfer device;
s10: heating the heat absorption end of the corrugated ribbon heat transfer device by adopting a heating unit with constant power P, and cooling the heat release end of the corrugated ribbon heat transfer device by adopting a cooling unit with cooling temperature T;
s20: measuring the temperature of the heat absorption end and the heat release end;
s30: after the temperature changes of the heat absorption end and the heat release end are stable, recording the stable temperatures of the heat absorption end and the heat release end, and calculating a temperature difference delta T;
s40: the heat transfer coefficient K of the corrugated ribbon heat transfer device at constant power P is obtained according to the formula (constant power P × equivalent heat transfer length L)/(effective cross-sectional area a × temperature difference Δ T).
7. The test method of claim 6, wherein:
in S10, the constant power P is 25-60W, and the cooling temperature T is 30-50 ℃.
8. The test method of claim 6, wherein:
in S20, the time for stabilizing the temperature change is 5-15min.
9. The test method of claim 6, wherein:
in S10, heat conductive paste is applied between the heating unit and the heat absorbing end, and between the cooling unit and the heat releasing end.
10. A test method for evaluating the performance of a corrugated ribbon heat transfer device is characterized by comprising the following steps:
s00: fixing the corrugated ribbon heat transfer device;
s10: cooling the heat release end of the corrugated ribbon heat transfer device by using a cooling unit with a cooling temperature T; heating the heat absorption end of the corrugated ribbon heat transfer device by adopting a heating unit, wherein the power value of the heating unit is P;
s20: measuring the temperature of the heat absorption end and the heat release end, and gradually increasing the power value after the temperature change of the heat absorption end and the heat release end is stable until the temperature of the heat absorption end and the heat release end can not reach the stability;
s30: record the power number at this timeObtaining the limit heat transfer power P of the corrugated ribbon-shaped heat transfer device at the cooling temperature T max 。
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211520660.3A CN115876834A (en) | 2022-11-30 | 2022-11-30 | Testing device and testing method for performance evaluation of corrugated ribbon heat transfer device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211520660.3A CN115876834A (en) | 2022-11-30 | 2022-11-30 | Testing device and testing method for performance evaluation of corrugated ribbon heat transfer device |
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| CN202211520660.3A Pending CN115876834A (en) | 2022-11-30 | 2022-11-30 | Testing device and testing method for performance evaluation of corrugated ribbon heat transfer device |
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- 2022-11-30 CN CN202211520660.3A patent/CN115876834A/en active Pending
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