Ice slurry thermal performance parameter testing apparatus and method

Abstract

This application relates to the field of ice slurry storage and thermal energy testing technology, and provides an ice slurry thermal performance parameter testing device and method, including: a sample testing unit comprising a first test container, a first magnetic stirring assembly, a first heating assembly, and a first temperature detection element; a control testing unit comprising a second test container, a second magnetic stirring assembly, and a second temperature detection element; the first temperature detection element heats the ice slurry to be tested in the first test container through the first heating assembly, and detects the temperature of the ice slurry to be tested during the stirring process by the first magnetic stirring assembly; the second magnetic stirring assembly performs stirring on the control liquid in the second test container in accordance with the stirring of the first magnetic stirring assembly; the second temperature detection element detects its temperature; and a processor determines the thermal performance parameters during the melting process of the ice slurry based on the total input heat of the first heating assembly and a heat correction term determined based on the temperature of the control liquid, thereby improving the accuracy of the thermal performance parameters.

Description

Technical Field

[0001] This application relates to the field of ice slurry storage and thermal energy testing and analysis technology, and in particular to an apparatus and method for testing the thermal performance parameters of ice slurry. Background Technology

[0002] Ice slurry, a two-phase fluid composed of ice crystals and a liquid carrier, has both sensible and latent heat storage capabilities, making it highly valuable for applications such as cold storage air conditioning, cold chain preservation, industrial heat exchange, and pipeline cleaning.

[0003] When evaluating the thermal performance parameters of ice slurry, calorimetry is particularly suitable for evaluating parameters such as heat of melting, ice content, melting rate, and equivalent latent heat because it directly correlates the input heat with the ice crystal melting process and its principle is intuitive. However, existing ice slurry melting test schemes have significant shortcomings in determining these thermal performance parameters: Firstly, to ensure uniform melting of the ice slurry sample, a stirring mechanism is usually required during the test, but this stirring process introduces additional heat into the test system, and this heat is difficult to measure separately; secondly, due to limitations in insulation structure and environmental conditions, conventional test containers cannot achieve complete insulation, and heat exchange between the container and the environment is inevitable, thus introducing heat leakage into the system.

[0004] Therefore, accurately determining the thermal performance parameters during the melting process of ice slurry is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] This application provides a device and method for testing the thermal performance parameters of ice slurry, which can effectively eliminate the interference of additional heat from stirring and heat leakage from the system, thereby accurately determining the thermal performance parameters during the melting process of ice slurry.

[0006] In a first aspect, this application provides an apparatus for testing the thermal performance parameters of ice slurry, comprising: A sample testing unit, a control testing unit, and a processor are arranged in the same testing space. The sample testing unit includes a first testing container, a first magnetic stirring assembly, a first heating assembly, and a first temperature detection element. The control testing unit includes a second testing container, a second magnetic stirring assembly, and a second temperature detection element. The first test container is used to hold the ice slurry to be tested; The first temperature detection element is used to detect the temperature of the ice slurry to be tested during the process of heating the ice slurry to be tested by the first heating component and stirring the ice slurry to be tested by the first magnetic stirring component. The second test container is used to hold a control liquid that is free of ice crystals and matches the ice slurry to be tested; The second magnetic stirring assembly is used to perform a stirring operation on the control liquid corresponding to that of the first magnetic stirring assembly; The second temperature sensing element is used to detect the temperature of the control liquid during the operation of the second magnetic stirring assembly; The processor is configured to determine the total input heat of the first heating component based on the heating power and heating time of the first heating component, and to determine a heat correction term based on the temperature of the control liquid. The heat correction term is used to characterize the additional heat generated by the stirring operation and the system leakage heat. Based on the total input heat, the heat correction term and the temperature of the ice slurry to be tested, the processor is configured to determine the thermal performance parameters of the ice slurry during the melting process.

[0007] According to the ice slurry thermal performance parameter testing device provided in this application, the first magnetic stirring component includes a first magnetic stirring plate disposed inside the first test container and a first magnetic driving component disposed outside the first test container. The second magnetic stirring assembly includes a second magnetic stirring plate disposed inside the second test container and a second magnetic drive assembly disposed outside the second test container; The first magnetic drive component is used to drive the first magnetic stirring plate to rotate via a magnetic field in order to perform a stirring operation on the ice slurry to be tested; The second magnetic drive assembly is used to drive the second magnetic stirrer to rotate via a magnetic field in order to perform a stirring operation on the control liquid.

[0008] According to the ice slurry thermal performance parameter testing device provided in this application, the sample testing unit further includes a first sealing cover, and the control testing unit further includes a second sealing cover and a second heating component. The first sealing cap is disposed on the first test container to seal the first test container, and the second sealing cap is disposed on the second test container to seal the second test container; The first sealing cover is provided with a sealing interface for the first heating component and the first temperature sensing element to pass through; the second sealing cover is provided with a sealing interface for the second heating component and the second temperature sensing element to pass through. The second heating component is used to adjust the initial temperature of the control liquid before the test, and the initial temperature of the adjusted control liquid is in the same temperature range as the initial temperature of the ice slurry to be tested; during the test, the second heating component remains closed.

[0009] According to the ice slurry thermal performance parameter testing device provided in this application, the bottom of the first test container and the second test container are both made of magnetically permeable insulating material that can be penetrated by a magnetic field, which respectively serve as the isolation wall between the ice slurry to be tested and the first magnetic drive component in the first magnetic stirring assembly, and between the control liquid and the second magnetic drive component in the second magnetic stirring assembly. And / or, Each of the first test container and the first magnetic drive component, and the second test container and the second magnetic drive component, is independently provided with an isolation wall made of a magnetically permeable insulating material.

[0010] According to the ice slurry thermal performance parameter testing device provided in this application, the sample testing unit is provided with a first heat preservation structure, and the control testing unit is provided with a second heat preservation structure; The first thermal insulation structure is used to reduce the system heat leakage between the sample testing unit and the external environment; the second thermal insulation structure is used to reduce the system heat leakage between the control testing unit and the external environment. The first insulation structure and the second insulation structure are also used to ensure that the sample test unit and the control test unit have consistent thermal boundary conditions during the test. The first test container and the second test container have the same geometric dimensions, the same liquid volume, the same thermal boundary conditions, and the same material. The first temperature sensing element and the second temperature sensing element are arranged in the same way; The magnetic stirring conditions of the first magnetic stirring assembly and the second magnetic stirring assembly are the same.

[0011] This application also provides a method for testing the thermal performance parameters of ice slurry, applied to the ice slurry thermal performance parameter testing device described in any of the above claims, the method comprising: The temperature of the ice slurry to be tested and the temperature of the control liquid are obtained. The temperature of the ice slurry to be tested is detected by a first temperature detection element during the process of heating the ice slurry to be tested by a first heating component and stirring the ice slurry to be tested by a first magnetic stirring component. The temperature of the control liquid is detected by a second temperature detection element during the process of stirring the control liquid by a second magnetic stirring component in accordance with the stirring operation of the first magnetic stirring component. The heating power and heating time of the first heating component are obtained, and the total input heat of the first heating component is determined based on the heating power and the heating time. A heat correction term is determined based on the temperature of the control liquid. The heat correction term is used to characterize the additional heat generated by the stirring operation and the system leakage heat. Based on the total input heat, the heat correction term, and the temperature of the ice slurry to be tested, the thermal performance parameters during the melting process of the ice slurry are determined.

[0012] The ice slurry thermal performance parameter testing device provided in this application includes a sample testing unit, a control testing unit, and a processor, all arranged in the same testing space. The sample testing unit includes a first testing container, a first magnetic stirring assembly, a first heating assembly, and a first temperature detection element. The control testing unit includes a second testing container, a second magnetic stirring assembly, and a second temperature detection element. The first testing container is used to hold the ice slurry to be tested. The first temperature detection element is used to detect the temperature of the ice slurry during heating by the first heating assembly and stirring by the first magnetic stirring assembly. The second testing container is used for... The test unit comprises: a control liquid containing ice crystals that matches the ice slurry to be tested; a second magnetic stirring assembly for performing stirring operations on the control liquid corresponding to those of the first magnetic stirring assembly; a second temperature detection element for detecting the temperature of the control liquid during the operation of the second magnetic stirring assembly; and a processor for determining the total input heat of the first heating assembly based on its heating power and heating time, and determining a heat correction term based on the temperature of the control liquid. The heat correction term characterizes the additional heat generated by stirring and the system leakage heat. Based on the total input heat, the heat correction term, and the temperature of the ice slurry to be tested, the thermal performance parameters during the ice slurry melting process are determined. By placing a sample test unit and a control test unit within the same test space, the changes in the control liquid detected by the control test unit under stirring only, without heating, comprehensively characterize the additional heat generated by stirring and the system leakage heat. The processor then corrects the total input heat of the sample test unit based on the heat correction term, thereby accurately correcting the total input heat of the sample unit. This effectively eliminates the interference of additional heat generated by stirring and the system leakage heat, and accurately determines the thermal performance parameters during the ice slurry melting process. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of a device for testing the thermal performance parameters of ice slurry, provided in an embodiment of this application.

[0015] Figure 2 This is a schematic diagram of a method for testing the thermal performance parameters of ice slurry, provided in an embodiment of this application.

[0016] Figure label: 10. Ice slurry thermal performance parameter testing device; 1. Sample testing unit; 2. Control testing unit; 3. Testing space; 4. Processor; 11. First test container; 12. First sealing cover; 13. First temperature detection element; 14. First heating component; 15. First magnetic stirring plate; 16. First magnetic drive component; 21. Second test container; 22. Second sealing cover; 23. Second temperature detection element; 24. Second heating component; 25. Second magnetic stirring plate; 26. Second magnetic drive component. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] In the embodiments of this application, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone, where A and B can be singular or plural. In the textual description of this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0019] The technical solutions provided in this application can be applied to scenarios such as cold storage air conditioning, cold chain preservation, industrial heat exchange, and pipeline cleaning. In these scenarios, it is usually necessary to determine the heat of melting, ice content, melting rate, and equivalent latent heat of the ice slurry through ice slurry melting tests, so as to evaluate the performance of the ice slurry using these thermal performance parameters.

[0020] Considering the existing ice slurry melting test scheme, there are obvious shortcomings in determining the above thermal performance parameters: On the one hand, in order to ensure that the ice slurry sample melts uniformly, a stirring mechanism is usually required during the test. However, this stirring process will introduce additional stirring heat into the test system, and this part of the heat is difficult to measure separately. On the other hand, due to the limitations of the insulation structure and environmental conditions, conventional test containers are difficult to achieve complete insulation. Heat exchange between the container and the environment is inevitable, which will introduce heat leakage into the system, resulting in low accuracy of the determined thermal performance parameters during the ice slurry melting process.

[0021] Therefore, accurately determining the thermal performance parameters during the melting process of ice slurry is a technical problem that urgently needs to be solved by those skilled in the art.

[0022] In order to accurately determine the thermal performance parameters during the melting process of ice slurry, this application provides an ice slurry thermal performance parameter testing device. It should be noted that the technical solution provided in this application is not limited to ice slurry samples, but can also be extended to other solid-liquid two-phase slurry melting test scenarios that require stirring in the near-phase temperature change zone and are difficult to achieve strict insulation. The specific settings can be made according to actual needs.

[0023] The ice slurry thermal performance parameter testing device provided in this application will be described in detail below through several specific embodiments. It is understood that these specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0024] Figure 1 This is a schematic diagram of a device for testing the thermal performance parameters of ice slurry according to an embodiment of this application. For example, please refer to [link to relevant documentation]. Figure 1 As shown, the ice slurry thermal performance parameter testing device 10 may include: The sample testing unit 1, the control testing unit 2, and the processor 4 are set up in the same testing space 3. The sample testing unit 1 includes a first testing container 11, a first magnetic stirring assembly 15, a first heating assembly 14, and a first temperature detection element 13; the control testing unit 2 includes a second testing container 21, a second magnetic stirring assembly 25, and a second temperature detection element 23. The first test container 11 is used to hold the ice slurry to be tested; The first temperature sensing element 13 is used to detect the temperature of the ice slurry to be tested during the process of heating the ice slurry to be tested by the first heating component 14 and stirring the ice slurry to be tested by the first magnetic stirring component. The second test container 21 is used to hold a control liquid that is free of ice crystals and matches the ice slurry to be tested; The second magnetic stirring assembly is used to perform stirring operations on the control liquid corresponding to those of the first magnetic stirring assembly; The second temperature sensing element 23 is used to detect the temperature of the control liquid during the operation of the second magnetic stirring assembly; The data processor 4 is used to determine the total input heat of the first heating component 14 based on the heating power and heating time of the first heating component 14, and to determine the heat correction term based on the temperature of the control liquid. The heat correction term is used to characterize the additional heat generated by the stirring operation and the system leakage heat. Based on the total input heat, the heat correction term and the temperature of the ice slurry to be tested, the thermal performance parameters during the melting process of the ice slurry are determined.

[0025] It should be noted that the aforementioned same test space 3 is used to provide a common environmental boundary for the sample test unit 1 and the control test unit 2, preferably a relatively thermally and humidly stable space; the same test space 3 itself does not serve as an overall thermal insulation space, but rather provides a common environmental boundary for the sample test unit 1 and the control test unit 2. In this way, there is no need to perform strict thermal insulation treatment on the overall space, so that the sample test unit 1 and the control test unit 2 can be placed under the same environmental boundary conditions, thereby ensuring that the environmental thermal interference experienced by the two is consistent, which facilitates the effective correction of the measurement results of the sample test unit 1 by the heat correction term measured by the control test unit 2.

[0026] For example, the bottom wall or partition of the first test container 11 and the second test container 21 can be made of glass, quartz, polytetrafluoroethylene, engineering plastics or other magnetically permeable insulating materials, so as to reduce the mechanical and thermal interference transmitted from the external driving mechanism to the ice slurry or control liquid carried therein while ensuring the magnetic field coupling effect.

[0027] For example, in one possible implementation, the bottoms of the first test container 11 and the second test container 21 are both made of a magnetically permeable insulating material, which serves as an isolation wall between the ice slurry to be tested and the first magnetic drive component 16 in the first magnetic stirring assembly, and between the control liquid and the second magnetic drive component 26 in the second magnetic stirring assembly. In this way, the bottoms of the first test container 11 and the second test container 21 simultaneously serve the dual functions of container bottom wall and magnetically permeable isolation wall, eliminating the need for additional isolation components, resulting in a more compact structure, simpler assembly, and reduced device cost and maintenance difficulty.

[0028] In another possible implementation, an isolation wall made of a magnetically permeable insulating material is independently provided between the first test container 11 and the first magnetic drive component 16, and between the second test container 21 and the second magnetic drive component 26. In this way, the magnetically permeable isolation wall is independent of the first test container 11 and the second test container 21. When the first test container 11 and the second test container 21 themselves do not have magnetic permeability, magnetic coupling stirring can still be achieved by adding an independent magnetically permeable isolation wall, which has a wider applicability. Moreover, when the isolation wall is damaged, it is not necessary to replace the entire test container, thereby reducing maintenance costs.

[0029] For example, in some embodiments, the first magnetic stirring assembly may include a first magnetic stirring blade 15 disposed inside the first test container 11 and a first magnetic drive assembly 16 disposed outside the first test container 11; the second magnetic stirring assembly may include a second magnetic stirring blade 25 disposed inside the second test container 21 and a second magnetic drive assembly 26 disposed outside the second test container 21.

[0030] The first magnetic drive assembly 16 drives the first magnetic stirrer 15 to rotate via a magnetic field to perform a stirring operation on the ice slurry to be tested; that is, there is no rigid mechanical connection between the first magnetic drive assembly 16 and the ice slurry to be tested. The second magnetic drive assembly 26 drives the second magnetic stirrer 25 to rotate via a magnetic field to perform a stirring operation on the control liquid; that is, there is no rigid mechanical connection between the second magnetic drive assembly 26 and the control liquid. This magnetic coupling method drives the first and second magnetic stirrers 15 to stir the ice slurry, eliminating the need for a mechanical shaft to directly penetrate the test container. This avoids the frictional heat and thermal bridge effect caused by traditional mechanical shaft stirring, thereby reducing the additional heat introduced into the testing device and improving testing accuracy.

[0031] For example, the first magnetic drive component 16 and the second magnetic drive component 26 can be a separate single magnetic stirrer, or they can be a combined magnetic drive module that can drive multiple test containers simultaneously, i.e., an integrated multi-station magnetic drive platform, etc. The specific configuration can be made according to actual needs.

[0032] For example, when the first magnetic drive assembly 16 drives the first magnetic stirrer 15 to rotate via a magnetic field to perform a stirring operation on the ice slurry to be tested, and the second magnetic drive assembly 26 drives the second magnetic stirrer 25 to rotate via a magnetic field to perform a stirring operation on the control liquid, the first magnetic drive assembly 16 and the second magnetic drive assembly 26 can be turned on separately so that the first magnetic stirrer 15 and the second magnetic stirrer 25 run at the same speed to perform the corresponding stirring operation, thereby ensuring that the internal temperature field of the sample group and the control group is as uniform as possible, and making the additional heat from stirring comparable between the two groups.

[0033] For example, in some embodiments, the first heating component 14 may be a heating structure that can use an immersion heating rod, or use microwaves or lasers to deliver heat from the top of the first test container 11, etc., and can be set according to actual needs.

[0034] It should be noted that during the ice slurry melting test, only the first heating component 14 in the sample test unit 1 is usually turned on for heating. During the process of passing through the heating component 14, the heating power and heating time of the sample test unit 1 are recorded, and the recorded heating power and heating time are sent to the processor, so that the processor can determine the total input heat of the first heating component 14 based on the heating power and heating time of the first heating component 14.

[0035] Understandably, given that not all of the total input heat from the first heating component 14 is used by the ice slurry to melt ice crystals, a portion of the heat is used to raise the temperature of the ice slurry (i.e., the sensible heat portion), while the remaining heat is lost as additional heat from stirring and system leakage. Therefore, it is necessary to correct the total input heat using the heat correction term measured by the control test unit 2 to deduct the effects of additional heat from stirring and system leakage, thereby obtaining the net heat actually used by the ice slurry to melt ice crystals.

[0036] The first temperature sensing element 13 and the second temperature sensing element 23 can be temperature sensors, such as PT100, RTD or thermocouple and other high-precision temperature measurement elements, which can be set according to actual needs.

[0037] For example, the temperature measuring point of the first temperature sensing element 13 can be set in the central area, near the wall area, or at different heights above and below the first test container 11 to evaluate the uniformity of the melting process of the ice slurry to be tested; similarly, the temperature measuring point of the second temperature sensing element 23 can be set in the central area, near the wall area, or at different heights above and below the second test container 21 to evaluate the uniformity of the melting process of the control liquid, so as to ensure that both have the same detection conditions, thereby ensuring the accuracy of the heat correction item.

[0038] For example, the amount of ice slurry to be tested in sample testing unit 1 can be significantly greater than the amount of ice slurry to be tested in conventional microcalorimetric analysis methods such as differential scanning calorimetry, which is more suitable for particulate dispersed ice slurry samples. The specific settings can be made according to actual needs.

[0039] For example, the control liquid can be water in the range of 0.5℃ to 2℃, preferably about 1℃; or, the control liquid can be a reference liquid with the same continuous liquid phase composition as the ice slurry to be tested in the sample test unit 1, but without solid ice crystals. The initial temperature of the control liquid is controlled in a range close to the melting temperature of the ice slurry without phase change, which can more realistically characterize the additional heat of the stirring process and the non-adiabatic error of the system.

[0040] In combination with the above Figure 1 The ice slurry thermal performance parameter testing device shown first adds the ice slurry to be tested into the first test container 11 of the sample test unit 1 when conducting the ice slurry melting test, and adds a control liquid that matches the ice slurry to be tested into the second test container 21 of the control test unit 2. For example, a liquid without ice crystals with the same volume, equivalent heat capacity, same mass, or same thermal response characteristics, preferably water at about 1°C.

[0041] Next, the first magnetic drive assembly 16 and the second magnetic drive assembly 26 are turned on, and the first magnetic stirring plate 15 and the second magnetic stirring plate 25 are driven to rotate by the magnetic field respectively, so as to synchronously stir the ice slurry to be tested and the control liquid, so as to ensure that the internal temperature field of both is uniform and that the additional heat of stirring is comparable in the two groups.

[0042] Furthermore, only the first heating component 14 of the sample testing unit 1 is activated for heating, and the heating power and heating time of the first heating component 14 are recorded. Simultaneously, the temperature of the ice slurry to be tested detected by the first temperature detection element 13 and the temperature of the control liquid detected by the second temperature detection element 23 are also recorded. During this process, the second heating component 24 of the control testing unit 2 remains off, used only for initial temperature adjustment before the ice slurry melting test, equipment calibration, or pretreatment of the control liquid. The control liquid is stirred only by the second magnetic stirring component 25.

[0043] Since the control test unit 2 does not start heating during the test, the temperature change of the control liquid is mainly determined by the additional heat of stirring introduced by magnetic stirring and the system leakage heat between the second test container 21 and the environment. Therefore, the processor 4 can determine the heat correction term based on the temperature of the control liquid. The heat correction term is used to characterize the additional heat of stirring and the system leakage heat generated by the stirring operation. Based on the total input heat, the heat correction term and the temperature of the ice slurry to be tested, the processor 4 determines the thermal performance parameters during the melting process of the ice slurry, such as the heat of melting, ice content, melting rate and equivalent latent heat of the ice slurry, thereby realizing an accurate evaluation of the melting performance of the ice slurry.

[0044] For example, the processor 4's determination of the heat correction item based on the temperature of the control liquid can include at least two possible implementations. In one possible implementation, the heat correction item is determined based on the detected temperature of the control liquid after the ice slurry under test has melted, i.e., at the end of the test. In another possible implementation, during the melting process of the ice slurry under test, the melting process can be segmented according to time or temperature, and a heat correction sub-item for each segment can be determined separately based on the detected temperature of the control liquid in each segment. The heat correction item is then determined based on the heat correction sub-item for each segment, i.e., dynamic modification is achieved. This allows for tracking changes in the heat added by stirring and the heat leaked by the system as the test progresses. For example, changes in stirring heat due to a decrease in liquid viscosity or changes in heat leakage due to a decrease in temperature difference can improve the correction accuracy under long-term testing or non-constant heating conditions. This is particularly suitable for scenarios where the heating power is not constant or the test time is long.

[0045] Similarly, the processor 4 determines the specific implementation of the thermal performance parameters during the melting process of the ice slurry based on the total input heat, the heat correction term, and the temperature of the ice slurry to be tested. For details, please refer to the ice slurry thermal performance parameter testing method below. Here, the embodiments of this application will not be described in detail.

[0046] As can be seen, in this embodiment of the application, by setting up a sample test unit 1 and a control test unit 2 in the same test space 3, the changes in the control liquid detected by the control test unit 2 under the condition of stirring only and without heating are used to comprehensively characterize the additional heat of stirring and the heat leakage of the system. The processor 4 corrects the total input heat of the sample test unit 1 based on the heat correction term, thereby accurately correcting the total input heat of the sample unit based on the heat correction term. This can effectively eliminate the interference of additional heat of stirring and heat leakage of the system, and accurately determine the thermal performance parameters during the melting process of ice slurry.

[0047] It should be noted that in some embodiments, when conducting ice slurry melting tests using the aforementioned ice slurry thermal performance parameter testing device 10, the sample testing unit 1 and the control testing unit 2 can be tested simultaneously or sequentially. Synchronous testing mode: The sample testing unit 1 and the control testing unit 2 are arranged synchronously within the same testing space 3 and run simultaneously. In synchronous testing mode, the environmental boundary conditions of the two testing units are strictly consistent, which is more conducive to correcting system errors. Sequential testing mode: Within the same testing space 3, the sample testing unit 1 and the control testing unit 2 are run sequentially according to the same set parameters. In sequential testing mode, by maintaining the states of the first testing container 11 and the second testing container 21, the stirring speed program of the first magnetic drive component 16 and the second magnetic drive component 26, and the environmental conditions consistent, the correction of system errors can also be achieved.

[0048] It is easy to see that the ice slurry thermal performance parameter testing device 10 in this embodiment has a relatively simple structure, is easy to build and promote, and can be used for ice slurry preparation optimization, heat exchange experiments, cold storage performance evaluation, and related equipment calibration. When it is necessary to measure different types of ice slurry samples, by keeping the test container, the rotation speed of the magnetic drive component, the heating power, and the environmental conditions unchanged, and only changing the sample type and the type of control liquid, a horizontal comparison between different samples can be achieved.

[0049] For example, in some embodiments, the sample testing unit 1 further includes a first sealing cap 12, and the control testing unit 2 further includes a second sealing cap 22 and a second heating component 24; the first sealing cap 12 is disposed on the first testing container 11 for sealing the first testing container 11, and the second sealing cap 22 is disposed on the second testing container 21 for sealing the second testing container 21.

[0050] The first sealing cover 12 has a sealing interface for the first heating component 14 and the first temperature sensing element 13 to pass through; the second sealing cover 22 has a sealing interface for the second heating component 24 and the second temperature sensing element 23 to pass through, so as to reduce environmental convection, evaporation and external thermal disturbance, improve the consistency of boundary conditions of the two test units, and place them in the same test space 3, so as to reduce the influence of evaporation, air disturbance and external heat exchange on the test without relying on the overall space insulation, making the test boundary more stable; for example, in some embodiments, the second heating component 24 is used to initially adjust the temperature of the control liquid before the test. The initial temperature of the adjusted control liquid is within the same temperature range as the initial temperature of the ice slurry to be tested. During the test, the second heating component 24 remains off. On the one hand, this ensures that the control liquid and the ice slurry to be tested have similar initial temperatures, ensuring that their thermal states are consistent at the start of the test. On the other hand, it ensures that the temperature changes of the control liquid detected by the control test unit 2 are caused by the stirring of the second magnetic stirrer 25 and the heat leakage from the external system, which can truly reflect the combined effect of the additional heat from stirring and the heat leakage from the system, avoiding the introduction of additional heat transfer errors due to excessive initial temperature difference, thereby further improving the accuracy of the calculated heat correction item.

[0051] For example, in some embodiments, the sample testing unit 1 is provided with a first thermal insulation structure (not in...). Figure 1 (as shown in the text), the control test unit 2 is equipped with a second insulation structure (not shown in the text). Figure 1 (as reflected in the text).

[0052] The first insulation structure is used to reduce the system heat leakage between the sample test unit 1 and the external environment, and the second insulation structure is used to reduce the system heat leakage between the control test unit 2 and the external environment. The first and second insulation structures are also used to ensure that the sample test unit 1 and the control test unit 2 have consistent thermal boundary conditions during the test. This reduces the system heat leakage between each unit and the external environment and ensures that the two units have consistent thermal boundary conditions during the test. Thus, without the need for overall space insulation, the heat correction term can accurately reflect the impact of environmental heat leakage on the test results.

[0053] For example, the first and second insulation structures can be made of insulation materials such as polyurethane foam, expanded polypropylene, or aerogel felt, and can be implemented in the form of insulation jackets, double-layer containers, or insulation bases with insulation covers. To ensure that the sample test unit 1 and the control test unit 2 have consistent thermal boundary conditions, the first and second insulation structures should use the same or equivalent materials, thicknesses, and structural forms to ensure that the sample test unit 1 and the control test unit 2 have the same thermal response characteristics during testing.

[0054] For example, in some embodiments, the first test container 11 and the second test container 21 have the same geometric dimensions, liquid volume, thermal boundary conditions, and materials; the first temperature sensing element 13 and the second temperature sensing element 23 are arranged in the same way; and the first magnetic stirring assembly 15 and the second magnetic stirring assembly 25 have the same magnetic stirring conditions. In this way, by keeping the sample test unit 1 and the control test unit 2 consistent in terms of container size, liquid volume, temperature sensing element arrangement, and magnetic stirring conditions, it is ensured that the temperature change of the control test unit 2 can truly reflect the additional heat of stirring of the sample unit and the system heat leakage, thereby providing a reliable basis for the accurate calculation of the heat correction item.

[0055] The first test container 11 and the second test container 21 have the same geometric dimensions, meaning they share the same shape, diameter, height, wall thickness, and other geometric parameters to ensure identical heat capacity and thermal response characteristics. The same liquid volume means the ice slurry in the first test container 11 and the control liquid in the second test container 21 have the same liquid volume, ensuring identical liquid heat capacity and a consistent relationship between temperature rise and heat absorption in both units. This effectively avoids differences in heat capacity between the sample test unit 1 and the control test unit 2 due to differences in container size or liquid volume, thus guaranteeing identical temperature rise response under the same stirring conditions.

[0056] The arrangement of the first temperature sensing element 13 and the second temperature sensing element 23 can be understood as the two temperature sensing elements having the same position in their respective test containers, such as the central area, near-wall area, insertion depth, and height from the bottom, to ensure that the measured temperatures are comparable and reflect temperature changes in the same spatial location.

[0057] The magnetic stirring conditions of the first magnetic stirring assembly 15 and the second magnetic stirring assembly 25 are the same, which can be understood as the same stirring speed, stirring blade shape and size, stirring power and other parameters, to ensure that the additional heat generated by stirring in the sample test unit 1 and the control test unit 2 is the same. In this way, the additional heat generated by stirring in the sample test unit 1 can be accurately reflected by the temperature change of the control test unit 2.

[0058] Based on the above Figure 1 The ice slurry thermal performance parameter testing device 10 shown in this application embodiment also provides an ice slurry thermal performance parameter testing method. For example, see the following: Figure 2 As shown, Figure 2 This is a schematic diagram of a method for testing the thermal performance parameters of ice slurry according to an embodiment of this application. The method for testing the thermal performance parameters of ice slurry may include: S201. Obtain the temperature of the ice slurry to be tested and the temperature of the control liquid. The temperature of the ice slurry to be tested is detected by the first temperature detection element 13 during the process of heating the ice slurry to be tested by the first heating component 14 and performing a stirring operation on the ice slurry to be tested by the first magnetic stirring component. The temperature of the control liquid is detected by the second temperature detection element 23 during the process of performing a stirring operation on the control liquid by the second magnetic stirring component in accordance with the stirring operation of the first magnetic stirring component.

[0059] It should be noted that the method for obtaining the temperature of the ice slurry to be tested and the temperature of the control liquid in S201 can be found in the relevant description in the above-mentioned ice slurry thermal performance parameter testing device 10. Here, the embodiments of this application will not be repeated.

[0060] S202. Obtain the heating power and heating time of the first heating component 14, and determine the total input heat of the first heating component 14 based on the heating power and heating time.

[0061] For example, in some embodiments, when determining the total input heat of the first heating component 14 based on the heating power and heating time, if the heating power is constant, the total input heat is equal to the product of the heating power and the heating time; if the heating power is variable, the total input heat is equal to the integral of the variable power over the heating time. The specific settings can be made according to actual needs, and this application embodiment does not further limit this.

[0062] S203. Determine the heat correction term based on the temperature of the control liquid. The heat correction term is used to characterize the additional heat generated by the stirring operation and the system leakage heat.

[0063] For example, in some embodiments, determining the heat correction term based on the temperature of the control liquid may include at least two of the following possible implementations: In one possible implementation, a heat correction term is determined based on the temperature of the control liquid when the ice slurry to be tested has completely melted.

[0064] Once the ice slurry under test has completely melted, the first end temperature of the control liquid at the end of the test is obtained. Based on the first temperature difference between the first end temperature and the initial temperature of the control liquid at the start of the test, a heat correction term is determined. In this way, the heat correction term is determined once based on the initial and final temperature difference of the control liquid when the ice slurry under test has completely melted, i.e., at the end of the test. This method has the advantages of simple calculation, easy implementation, and reduced data acquisition pressure, and is suitable for test scenarios where the heat of stirring and heat leakage are relatively stable.

[0065] For example, when determining the heat correction term based on the first temperature difference between the first ending temperature and the initial temperature of the control liquid at the start of the test, the first total equivalent heat capacity of the control test unit 2 can be determined firstly based on the mass and specific heat capacity of the control liquid, the mass and equivalent specific heat capacity of the second test container 21, the mass and specific heat capacity of the second magnetic stirrer 25, and the mass and specific heat capacity of the second temperature sensing element 23. Then, the heat correction term is determined based on the product of the first total equivalent heat capacity and the first temperature difference. By determining the first total equivalent heat capacity using the mass and specific heat capacity of the control liquid, the mass and equivalent specific heat capacity of the second test container 21, the mass and specific heat capacity of the second magnetic stirrer 25, and the mass and specific heat capacity of the second temperature sensing element 23, and then multiplying it by the first temperature difference to determine the heat correction term, the heat absorption contribution of each component of the control test unit 2 can be comprehensively considered, making the calculation of the heat correction term more accurate and reliable.

[0066] For example, in some embodiments, when determining the first total equivalent heat capacity of the control test unit 2 based on the mass and specific heat capacity of the control liquid, the mass and equivalent specific heat capacity of the second test container 21, the mass and specific heat capacity of the second magnetic stirrer 25, and the mass and specific heat capacity of the second temperature sensing element 23, the following formula 1 can be used: Formula 1 in, Indicates the first total equivalent mass. This represents the first total equivalent heat capacity. Indicates the mass of the control liquid. This indicates the specific heat capacity of the control liquid. This indicates the mass of the second test container 21. Indicates the equivalent specific heat capacity of the second test container 21, This indicates the mass of the second magnetic stirrer plate 25. This indicates the specific heat capacity of the second magnetic stirrer plate 25. This indicates the mass of the second temperature sensing element 23. This indicates the specific heat capacity of the second temperature sensing element 23.

[0067] For example, in some embodiments, a heat correction term is determined based on the product of a first total equivalent heat capacity and a first temperature difference, as shown in Formula 2 below: Formula 2 in, Indicates the heat correction term. This represents the first temperature difference, i.e., the initial and final temperature increase of the control liquid.

[0068] In another possible implementation, a heat correction term is determined based on the temperature of the control liquid detected in segments during the melting process of the ice slurry to be tested.

[0069] Based on a preset time step or temperature range, the melting process of the ice slurry to be tested is divided into multiple melting intervals. For each melting interval, the initial temperature and the second final temperature of the control liquid within the melting interval are obtained. Based on the second temperature difference between the second final temperature and the initial temperature, a heat correction sub-item corresponding to the melting interval is determined. Based on the heat correction sub-item corresponding to each melting interval, a heat correction term is determined. In this way, by segmenting the ice slurry melting process according to the time step or temperature range, calculating the heat correction sub-item segment by segment, and accumulating them to obtain the heat correction term, it is possible to track the changes in the additional heat of stirring and the system heat leakage as the test progresses, effectively improving the correction accuracy under long-term testing or non-constant heating conditions.

[0070] The preset time step or temperature range can be set according to actual needs. When the heating power is not constant, the more segments the melting range is divided into, the smaller the temperature change in each melting range, and the closer it is to a linear change. This allows for more accurate tracking of the changes in the additional heat of stirring and the system heat leakage as the test progresses, reducing the approximate error introduced by using the average correction value, thereby further improving the accuracy of the heat correction item.

[0071] For example, in some embodiments, the heat correction sub-item corresponding to the melting range is determined based on the second temperature difference between the second end temperature and the start temperature, including: determining the first total equivalent heat capacity of the control test unit 2 based on the mass and specific heat capacity of the control liquid, the mass and equivalent specific heat capacity of the second test container 21, the mass and specific heat capacity of the second magnetic stirrer 25, and the mass and specific heat capacity of the second temperature detection element 23; and determining the heat correction sub-item corresponding to the melting range based on the product of the first total equivalent heat capacity and the second temperature difference.

[0072] It is understood that the specific implementation of determining the first total equivalent heat capacity of the control test unit 2 based on the mass and specific heat capacity of the control liquid, the mass and equivalent specific heat capacity of the second test container 21, the mass and specific heat capacity of the second magnetic stirring plate 25, and the mass and specific heat capacity of the second temperature sensing element 23 can be referred to as Formula 1 above. The specific implementation of determining the heat correction sub-item corresponding to the melting range based on the product of the first total equivalent heat capacity and the second temperature difference can be referred to as Formula 2 above. Here, the embodiments of this application will not be described in detail.

[0073] For example, when determining the heat correction term based on the heat correction sub-items corresponding to each melting interval, the heat correction sub-items corresponding to each melting interval can be accumulated to obtain the heat correction term. The calculation logic is simple and intuitive, naturally corresponds to the segmentation method, and is mathematically accurate, making it easy to implement in a program and trace the results.

[0074] S204. Based on the total input heat, heat correction term, and temperature of the ice slurry to be tested, determine the thermal performance parameters during the melting process of the ice slurry.

[0075] For example, in some embodiments, thermal performance parameters during the melting process of ice slurry are determined based on total input heat, heat correction terms, and the temperature of the ice slurry to be measured, including: The actual net heat absorbed by the ice slurry is determined based on the difference between the total input heat and the heat correction term. The sensible heat of the ice slurry is determined based on its total mass, average specific heat capacity during the test, and the third temperature difference between the initial and final temperatures. Finally, the thermal performance parameters during the melting process are determined based on the difference between the actual net heat absorbed and the sensible heat. This progressive logic—subtracting the heat correction term from the total input heat to obtain the actual net heat absorbed, and then subtracting the sensible heat to obtain the thermal performance parameters during the melting process—strictly adheres to the principle of heat balance. Each step has a clear physical meaning, effectively eliminating interference from additional heat from stirring and system heat leakage, ensuring a clear and controllable conversion process from raw electrical work data to final performance indicators. Simultaneously, by introducing average specific heat capacity and temperature difference to calculate sensible heat, accurate deduction of heat consumed during sample heating is achieved, thus accurately obtaining the net heat contributed by ice crystal melting. This provides a reliable basis for subsequent calculations of ice content, melting rate, and equivalent heat of melting, significantly improving the accuracy and reliability of ice slurry melting performance evaluation.

[0076] For example, the actual net heat absorbed by the ice slurry to be tested is determined based on the difference between the total input heat and the heat correction term, as shown in Formula 3 below: Formula 3 in, This indicates the actual net heat absorbed by the ice slurry being tested. Indicates total heat input. This indicates a heat correction term.

[0077] For example, the sensible heat of the ice slurry to be tested is determined based on the total mass of the ice slurry, the average specific heat capacity of the ice slurry during the test, and the third temperature difference between the final temperature and the initial temperature of the ice slurry, as shown in Formula 4 below: Formula 4 in, This indicates the sensible heat of the ice slurry being measured. Indicates the total mass of the ice slurry to be tested. Indicates the average specific heat capacity of the ice slurry being tested during the test process. This represents the third temperature difference between the end temperature and the starting temperature of the ice slurry being tested.

[0078] For example, when determining the thermal performance parameters of the ice slurry melting process based on the difference between the actual net heat absorbed and the sensible heat, taking the thermal performance parameters of the ice slurry melting process including the heat of melting, ice content, melting rate, and equivalent latent heat of the ice slurry as an example, when determining the heat of melting of the ice slurry based on the latent heat of the ice slurry, refer to the following formula 5: Formula 5 in, This indicates the heat of melting of the ice slurry being measured, also known as latent heat. This indicates the actual net heat absorbed. It represents sensible heat.

[0079] For example, when determining the ice content of the ice slurry to be tested, refer to Formula 6 below: Formula 6 in, This indicates the ice content of the ice slurry being tested. The standard heat of melting of pure ice.

[0080] For example, when determining the equivalent latent heat of the ice slurry to be tested, refer to the following formula 7: or, Formula 7 in, This represents the equivalent heat of melting per unit mass of the ice slurry being tested. This represents the equivalent heat of melting per unit mass of ice crystals. = .

[0081] As can be seen from the embodiments of this application, by setting up a control test unit that is synchronously stirred with the sample test unit, the temperature change of the control liquid under conditions of stirring only and no heating is used to achieve a comprehensive quantitative characterization of the additional heat from stirring and the heat leakage from the system. This heat correction term is then incorporated into the heat analysis of the sample test unit for correction. Therefore, during the ice slurry melting test, the additional heat introduced by the stirring operation and the systematic errors caused by environmental heat exchange can be effectively eliminated, significantly improving the accuracy and repeatability of the test of thermal performance parameters such as the heat of melting, ice content, melting rate, and equivalent latent heat of ice slurry. Furthermore, this ice slurry melting test method does not rely on complex adiabatic conditions and sophisticated micro-analysis equipment; it is simple to operate and suitable for the rapid and accurate evaluation of engineered ice slurry samples.

[0082] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A device for testing the thermal performance parameters of ice slurry, characterized in that, include: A sample testing unit, a control testing unit, and a processor are arranged in the same testing space. The sample testing unit includes a first testing container, a first magnetic stirring assembly, a first heating assembly, and a first temperature detection element. The control testing unit includes a second testing container, a second magnetic stirring assembly, and a second temperature detection element. The first test container is used to hold the ice slurry to be tested; The first temperature detection element is used to detect the temperature of the ice slurry to be tested during the process of heating the ice slurry to be tested by the first heating component and stirring the ice slurry to be tested by the first magnetic stirring component. The second test container is used to hold a control liquid that is free of ice crystals and matches the ice slurry to be tested; The second magnetic stirring assembly is used to perform a stirring operation on the control liquid corresponding to that of the first magnetic stirring assembly; The second temperature sensing element is used to detect the temperature of the control liquid during the operation of the second magnetic stirring assembly; The processor is configured to determine the total input heat of the first heating component based on the heating power and heating time of the first heating component, and to determine a heat correction term based on the temperature of the control liquid. The heat correction term is used to characterize the additional heat generated by the stirring operation and the system leakage heat. Based on the total input heat, the heat correction term and the temperature of the ice slurry to be tested, the processor is configured to determine the thermal performance parameters of the ice slurry during the melting process.

2. The ice slurry thermal performance parameter testing device according to claim 1, characterized in that, The first magnetic stirring assembly includes a first magnetic stirring blade disposed inside the first test container and a first magnetic drive assembly disposed outside the first test container; The second magnetic stirring assembly includes a second magnetic stirring plate disposed inside the second test container and a second magnetic drive assembly disposed outside the second test container; The first magnetic drive component is used to drive the first magnetic stirring plate to rotate via a magnetic field in order to perform a stirring operation on the ice slurry to be tested; The second magnetic drive assembly is used to drive the second magnetic stirrer to rotate via a magnetic field in order to perform a stirring operation on the control liquid.

3. The ice slurry thermal performance parameter testing device according to claim 1 or 2, characterized in that, The sample testing unit further includes a first sealing cover, and the control testing unit further includes a second sealing cover and a second heating component; The first sealing cap is disposed on the first test container to seal the first test container, and the second sealing cap is disposed on the second test container to seal the second test container; The first sealing cover is provided with a sealing interface for the first heating component and the first temperature sensing element to pass through; the second sealing cover is provided with a sealing interface for the second heating component and the second temperature sensing element to pass through. The second heating component is used to adjust the initial temperature of the control liquid before the test, and the initial temperature of the adjusted control liquid is in the same temperature range as the initial temperature of the ice slurry to be tested. During the test, the second heating component remained off.

4. The ice slurry thermal performance parameter testing device according to claim 3, characterized in that, The bottoms of both the first and second test containers are made of a magnetically permeable insulating material that can be penetrated by a magnetic field, serving as isolation walls between the ice slurry to be tested and the first magnetic drive component in the first magnetic stirring assembly, and between the control liquid and the second magnetic drive component in the second magnetic stirring assembly, respectively. And / or, Each of the first test container and the first magnetic drive component, and the second test container and the second magnetic drive component, is independently provided with an isolation wall made of a magnetically permeable insulating material.

5. The ice slurry thermal performance parameter testing device according to claim 1 or 2, characterized in that, The sample testing unit is provided with a first heat insulation structure, and the control testing unit is provided with a second heat insulation structure; The first thermal insulation structure is used to reduce the system heat leakage between the sample testing unit and the external environment; the second thermal insulation structure is used to reduce the system heat leakage between the control testing unit and the external environment. The first insulation structure and the second insulation structure are also used to ensure that the sample test unit and the control test unit have consistent thermal boundary conditions during the test. The first test container and the second test container have the same geometric dimensions, the same liquid volume, the same thermal boundary conditions, and the same material. The first temperature sensing element and the second temperature sensing element are arranged in the same way; The magnetic stirring conditions of the first magnetic stirring assembly and the second magnetic stirring assembly are the same.

6. A method for testing the thermal performance parameters of ice slurry, characterized in that, The method, applied to the ice slurry thermal performance parameter testing device according to any one of claims 1-5, comprises: The temperature of the ice slurry to be tested and the temperature of the control liquid are obtained. The temperature of the ice slurry to be tested is detected by a first temperature detection element during the process of heating the ice slurry to be tested by a first heating component and stirring the ice slurry to be tested by a first magnetic stirring component. The temperature of the control liquid is detected by a second temperature detection element during the process of stirring the control liquid by a second magnetic stirring component in accordance with the stirring operation of the first magnetic stirring component. The heating power and heating time of the first heating component are obtained, and the total input heat of the first heating component is determined based on the heating power and the heating time. A heat correction term is determined based on the temperature of the control liquid. The heat correction term is used to characterize the additional heat generated by the stirring operation and the system leakage heat. Based on the total input heat, the heat correction term, and the temperature of the ice slurry to be tested, the thermal performance parameters during the melting process of the ice slurry are determined.

7. The method for testing the thermal performance parameters of ice slurry according to claim 6, characterized in that, The determination of the heat correction term based on the temperature of the control liquid includes: If it is determined that the ice slurry to be tested has completely melted, obtain the first end temperature at the end of the test of the control liquid; The heat correction term is determined based on the first temperature difference between the first end temperature and the initial temperature of the control liquid at the start of the test.

8. The method for testing the thermal performance parameters of ice slurry according to claim 7, characterized in that, The determination of the heat correction term based on the first temperature difference between the first end temperature and the initial temperature of the control liquid at the start of the test includes: Based on the mass and specific heat capacity of the control liquid, the mass and equivalent specific heat capacity of the second test container, the mass and specific heat capacity of the second magnetic stirrer, and the mass and specific heat capacity of the second temperature sensing element, the first total equivalent heat capacity of the control test unit is determined. The heat correction term is determined based on the product of the first total equivalent heat capacity and the first temperature difference.

9. The method for testing the thermal performance parameters of ice slurry according to claim 6, characterized in that, The determination of the heat correction term based on the temperature of the control liquid includes: Based on a preset time step or temperature range, the melting process of the ice slurry to be tested is divided into multiple melting intervals; For each melting interval, the starting temperature and the second ending temperature of the control liquid within the melting interval are obtained, and based on the second temperature difference between the second ending temperature and the starting temperature, the heat correction sub-item corresponding to the melting interval is determined. The heat correction item is determined based on the heat correction sub-item corresponding to each of the melting intervals.

10. The method for testing the thermal performance parameters of ice slurry according to claim 9, characterized in that, The step of determining the heat correction sub-item corresponding to the melting range based on the second temperature difference between the second ending temperature and the starting temperature includes: Based on the mass and specific heat capacity of the control liquid, the mass and equivalent specific heat capacity of the second test container, the mass and specific heat capacity of the second magnetic stirrer, and the mass and specific heat capacity of the second temperature sensing element, the first total equivalent heat capacity of the control test unit is determined. Based on the product of the first total equivalent heat capacity and the second temperature difference, the heat correction sub-item corresponding to the melting range is determined.

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