阅读说明：本技术 一种测量复合相变材料蓄热性能的装置及其测量方法 (Device and method for measuring heat storage performance of composite phase-change material ) 是由 王泽华 张俊霞 于 2019-11-20 设计创作，主要内容包括：本发明公开了一种测量复合相变材料蓄热性能的装置及其测量方法,属于相变材料技术领域,该装置通过在封装盒内设置支架,并在支架的下部设置多个热电偶,在封装盒外部设有与热电偶电性连接的测温仪,以及用于提供热源的散热源,使用时,散热源与封装盒底部接触,封装盒内部的复合相变材料吸热后融化,安装在支架上的热电偶感知到封装盒内相变材料的温度变化后,将温度值传递到测温仪,该装置可测量封装在封装盒中的复合相变材料蓄热过程中的温度场分布,从而得出复合材料的相变情况。结构简单,节能环保,可有效测量复合相变材料蓄热过程中的温度分布。(The invention discloses a device for measuring the heat storage performance of a composite phase-change material and a measuring method thereof, belonging to the technical field of phase-change materials. The device has the advantages of simple structure, energy conservation and environmental protection, and can effectively measure the temperature distribution of the composite phase-change material in the heat storage process.)

1. The utility model provides a measure device of compound phase change material heat accumulation performance which characterized in that: the temperature measurement device comprises a packaging box (2) and a support (8), wherein a composite phase change material to be measured is packaged in the packaging box (2), the support (8) is arranged in the packaging box (2), a plurality of thermocouples (7) are arranged at the lower part of the support (8), the upper part of the support (8) extends out of the top of the packaging box (2), and a temperature measurement instrument (6) electrically connected with the thermocouples (7) is arranged outside the packaging box (2); the packaging box also comprises a heat dissipation source for providing a heat source, and when the packaging box is used, the heat dissipation source is in contact with the bottom of the packaging box (2).

2. The apparatus for measuring the heat storage performance of the composite phase-change material according to claim 1, wherein: two layers of thermocouples (7) are arranged on the support (8) along the circumference of the support (8), and a plurality of thermocouples (7) on each layer are uniformly arranged in a surrounding manner.

3. The apparatus of claim 2, wherein the apparatus comprises: when in use, the heat dissipation source is arranged at the position of a circle center formed by the surrounding of a plurality of thermocouples (7).

4. The apparatus of claim 1, wherein the apparatus comprises: the cover plate (1) at the top of the packaging box (2) is provided with an interface (3), the interface (3) is connected with a sleeve (4) in a threaded manner, and the top end of the support (8) extends out of the packaging box (2) through the sleeve (4).

5. The apparatus of claim 4, wherein the apparatus comprises: the thermocouple (7) is connected with the temperature measuring instrument (6) by adopting a lead, and the lead is wound on the bracket (8) and fixed by a cotton thread (9); after being gathered, a plurality of leads extend out of the packaging box (2) through the sleeve (4) and are fixed through the clamping sleeve (5), and the upper end of the sleeve (4) is sealed in a cementing way.

6. The apparatus for measuring the heat storage performance of the composite phase-change material as claimed in any one of claims 1 to 5, wherein: the bottom of the bracket (8) is provided with a bearing (12) for supporting the bracket.

7. The apparatus of claim 6, wherein the apparatus comprises: the bottom of the bracket (8) is triangular branches, each branch is provided with 2 supports (12), and 6 supports (12) are welded at the bottom of the packaging box (2).

8. The apparatus of claim 1, wherein the apparatus comprises: the support (8) is a rod made of polyvinyl chloride, and the diameter of the rod is 2-3 mm.

9. The method for measuring the heat storage performance of the composite phase change material according to any one of claims 1 to 5 and 7 to 8 is characterized by comprising the following steps: the bottom of the packaging box (2) is contacted with a heat radiation source, the composite phase-change material arranged in the packaging box (2) absorbs heat and then melts, a thermocouple (7) arranged on a support (8) senses temperature change, a temperature value is transmitted to a temperature measuring instrument (6), the heat radiation condition of the composite phase-change material is detected, and the phase-change condition of the composite phase-change material is determined by comparing the temperature value with the melting point of the composite phase-change material.

Technical Field

The invention belongs to the technical field of phase-change materials, and relates to a device and a method for measuring the heat storage performance of a composite phase-change material.

Background

The phase change heat exchange of the composite material belongs to the interactive coupling of various physical fields and the complex processes of solid-liquid two-phase flow, heat transfer and mass transfer. At present, a plurality of scholars study the heat storage process of the phase-change composite material through experiments and theories. They point out that the phase change heat exchange of pure paraffin is mainly based on natural convection, the difference of the change rate of the internal transient temperature is large, the compactness and the uniformity of the composite phase change material can be effectively improved by adding polyethylene, the addition of foamed aluminum and foamed copper has important influence on a phase change temperature field and response time, the characteristic that the temperature in the phase change process is kept constant can be improved, the increase of the porosity can prolong the time for completely melting the phase change material, and the heat conductivity coefficient of the composite material is reduced. There are also scholars considering only the effect of the imbalance between paraffin and copper foam. They also developed a porous medium model and an enthalpy-porosity technology to simulate the melting process of the phase-change material, and analyzed the influence of the phase-change material on the heat dissipation effect of the lithium battery by establishing a transient heat conduction model of the heat generation of the square lithium battery.

However, the above experiments and numerical simulation of phase change heat exchange are mostly qualitative discussions, and a quantitative analysis of dimensionless parameters in the phase change heat exchange process is lacked, so it is necessary to provide an experimental apparatus for experimental research of temperature distribution change conditions in the heat storage process of the composite phase change material.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a device for detecting the heat storage performance of a composite phase-change material and a detection method thereof.

In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:

the invention discloses a device for measuring the heat storage performance of a composite phase-change material, which comprises a packaging box and a support, wherein the composite phase-change material to be measured is packaged in the packaging box; the packaging box also comprises a heat dissipation source for providing a heat source, and the heat dissipation source is contacted with the bottom of the packaging box when in use.

Preferably, two layers of thermocouples are arranged on the support along the circumference of the support, and a plurality of thermocouples on each layer are uniformly arranged in a surrounding manner.

Further preferably, the heat dissipation source is arranged at the position of a circle center formed by surrounding a plurality of thermocouples when in use.

Preferably, the cover plate at the top of the packaging box is provided with an interface, the interface is in threaded connection with a sleeve, and the top end of the support extends out of the packaging box through the sleeve.

Further preferably, the thermocouple is connected with the temperature measuring instrument by adopting a lead, and the lead is wound on the bracket and fixed by cotton threads; the plurality of leads are gathered and then extend out of the packaging box through the sleeve, and are fixed through the clamping sleeve, and the upper end of the sleeve is sealed in a cementing way.

Preferably, a support for supporting the same is provided at the bottom of the stand.

Further preferably, the bottom of the bracket is triangular and branched, 2 supports are arranged on each branch, and 6 supports are welded on the bottom of the packaging box.

Preferably, the stent is a rod made of polyvinyl chloride, the rod having a diameter of 2-3 mm.

The invention also discloses a method for measuring by adopting the device for measuring the heat storage performance of the composite phase-change material, which comprises the following steps:

the bottom of the packaging box is contacted with a heat dissipation source, the composite phase-change material arranged in the packaging box absorbs heat and then melts, a thermocouple arranged on the support senses temperature change, a temperature value is transmitted to a temperature measuring instrument, the heat dissipation condition of the composite phase-change material is detected, and the phase-change condition of the composite phase-change material is determined by comparing the temperature value with the melting point of the composite phase-change material.

Compared with the prior art, the invention has the following beneficial effects:

the invention relates to a device for measuring the heat storage performance of a composite phase change material, which is characterized in that a support is arranged in a packaging box, a plurality of thermocouples are arranged at the lower part of the support, a temperature measuring instrument electrically connected with the thermocouples and a heat dissipation source for providing a heat source are arranged outside the packaging box, when the device is used, the heat dissipation source is in contact with the bottom of the packaging box, the composite phase change material in the packaging box melts after absorbing heat, the thermocouples arranged on the support sense the temperature change of the phase change material in the packaging box and then transmit the temperature value to the temperature measuring instrument, and the device can measure the temperature field distribution in the heat storage process of the composite phase change material packaged in the packaging box, so that the phase change condition of the composite material is obtained. The device has the advantages of simple structure, energy conservation and environmental protection, and can effectively measure the temperature distribution of the composite phase-change material in the heat storage process.

Furthermore, the lead of the thermocouple is wound on the support, the lead is bound by cotton threads, the support bound with the thermocouple penetrates through the interface and penetrates through the casing, the casing and the interface are in threaded connection, the leads of the thermocouples on the end head of the lower portion of the support are gathered together and extend out of the upper port of the casing, the leads are fixed on the casing by the clamping sleeve, the upper port of the casing is sealed by glue, the sealing box can be guaranteed to be internally sealed, meanwhile, if the thermocouple is damaged, the cover plate can be opened, the glue on the top end of the support is peeled off, the clamping sleeve is loosened, the casing and the interface are unscrewed, and the damaged thermal resistor can be replaced after the support is taken out of the interface and the casing.

Furthermore, the bottom of the bracket is a triangular forked bracket, 2 supports are arranged on each forked bracket, and 6 supports are welded at the bottom of the packaging box, so that the stability of the bracket can be ensured.

Furthermore, the support is a rod made of polyvinyl chloride, the influence on the phase change heat exchange condition of the composite phase change material due to the fact that metal is adopted is avoided, the diameter of the rod is 2-3mm, and the phenomenon that the temperature field of the phase change composite material is interfered due to the fact that the diameter is too large is avoided.

The method for measuring the heat storage performance of the composite phase-change material is completed based on the device, and the test process is simple to operate: the bottom of the packaging box is contacted with a heat radiation source, the composite phase-change material in the packaging box melts after absorbing heat, a thermocouple arranged on the support senses temperature change, a temperature value is transmitted to a temperature measuring instrument, the heat radiation condition of the composite phase-change material can be detected, and the phase-change condition of the composite phase-change material can be determined by comparing the temperature value with the melting point of the composite phase-change material.

Drawings

FIG. 1 is a schematic structural view of the present invention;

wherein: 1-cover plate; 2-packaging the box; 3-interface; 4-a sleeve; 5, cutting the ferrule; 6-a temperature measuring instrument; 7-a thermocouple; 8-a scaffold; 9-cotton thread; 10-glue; 11-composite phase change material; 12-supporting.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The invention is described in further detail below with reference to the accompanying drawings:

referring to fig. 1, a device for measuring the heat storage performance of a composite phase change material comprises a support 8 and a packaging box 2 for packaging the composite phase change material 11, wherein the support 8 is arranged in the packaging box 2, a plurality of thermocouples 7 are arranged at the lower part of the support 8, the upper part of the support 8 extends out of the top of the packaging box 2, and a temperature measuring instrument 6 electrically connected with the thermocouples 7 is arranged outside the packaging box 2; the packaging box also comprises a heat dissipation source for providing a heat source, and the heat dissipation source is contacted with the bottom of the packaging box 2 when in use.

Further, a connector 3 is arranged on the cover plate 1 at the top of the packaging box 2, a sleeve 4 is connected to the connector 3 in a threaded mode, and the top end of the support 8 can extend out of the packaging box 2 through the sleeve 4 and is connected with a temperature measuring instrument 6 outside the packaging box 2. The thermocouple 7 is connected with the temperature measuring instrument 6 by adopting a lead, and the lead is wound on the bracket 8 and is fixed by a cotton thread 9; after being gathered, a plurality of leads extend out of the packaging box 2 through the sleeve 4 and are fixed through the clamping sleeve 5, and the upper end of the sleeve 4 is sealed in a cementing way.

Furthermore, the bottom of the enclosure 2 is connected with a support 12 for supporting the bracket 8, the bottom of the bracket 8 is triangular and bifurcated, 2 supports 12 are arranged on each bifurcation, and 6 supports 12 are welded on the bottom of the enclosure 2.

Further, the lead wire of the thermocouple 7 is wound on the bracket 8 and fixed with a cotton thread 9 to prevent the thermocouple 7 from falling; the bracket 8 is a rod made of polyvinyl chloride, and the diameter of the rod is 2-3 mm; the composite phase-change material 11 is metal or paraffin; the arrangement of the thermocouples 7 is annularly arranged by taking the heat dissipation source as a center, so that the heat diffusion condition of the heat source is determined.

Preferably, the thermal resistor 7 can be Pt100 platinum rhodium alloy thermal resistor, and the probe can be 0.5 mm.

Preferably, the composite phase-change material 11 may be selected from metal/paraffin, and the metal may be copper powder, magnesium powder, aluminum powder, etc.

The bracket 8 can be made of PVC, so that the influence of metal on the phase change heat exchange condition of the composite phase change material 11 is avoided. The rod of the bracket 8 is as thin as possible, and can be selected to be 2-3mm, so that the temperature field of the composite phase-change material 11 is prevented from being interfered.

The cotton thread 9 can be selected from about 0.5mm sewing thread.

The thermometer 6 may be Agilent34970A available from german technology.

The interface 3 can choose the metal material for use, welds on the encapsulation box 2.

When the device for measuring the heat storage performance of the composite phase-change material is used:

the bottom of the packaging box 2 is contacted with a heat radiation source, the composite phase change material 11 in the packaging box 2 absorbs heat and then melts, the thermocouple 7 arranged on the bracket 8 senses temperature change, and a temperature value is transmitted to the temperature measuring instrument 6, so that the heat radiation condition of the composite phase change material 11 can be detected; the phase change condition of the composite phase change material 11 can also be determined by comparing the temperature value with the melting point of the composite phase change material; if the thermal resistor 7 is damaged, the cover plate 1 can be opened, the glue 10 at the top end of the support 8 is peeled off, the cutting sleeve 5 is loosened, the sleeve 4 and the interface 3 are unscrewed, the support 8 is taken out from the interface 3 and the sleeve 4, and the damaged thermal resistor 7 is replaced.

The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.