CN115902119A - Material thermal safety testing device and method - Google Patents
Material thermal safety testing device and method Download PDFInfo
- Publication number
- CN115902119A CN115902119A CN202211636792.2A CN202211636792A CN115902119A CN 115902119 A CN115902119 A CN 115902119A CN 202211636792 A CN202211636792 A CN 202211636792A CN 115902119 A CN115902119 A CN 115902119A
- Authority
- CN
- China
- Prior art keywords
- temperature
- real
- time
- historical
- heat transfer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention provides a device and a method for testing the thermal safety of a material, wherein the device comprises: the material testing tank is internally provided with a material temperature detection assembly, a material pressure sensor and a gas phase temperature sensor; the device comprises a pressure-resistant container, wherein an accommodating cavity for installing the material testing pool is arranged in the middle of the pressure-resistant container, at least one layer of medium cavity is arranged between the inner side wall of the pressure-resistant container and the outer side wall of the accommodating cavity, and a heat transfer medium, a heater, a pressurizer, a medium temperature sensor and a medium pressure sensor are arranged in each layer of medium cavity; and the controller is used for adjusting the real-time heating temperature of the heater and the real-time pressure of the pressurizer according to the real-time material temperature, the real-time material pressure, the real-time gas phase temperature, the real-time medium temperature and the real-time medium pressure. The invention can ensure that the heat of the material to be tested is uniformly distributed without stirring, is suitable for different types of materials and improves the test accuracy.
Description
Technical Field
The invention relates to the technical field of chemical industry, in particular to a device and a method for testing the thermal safety of materials.
Background
With the rapid development of chemical technology, chemical safety is particularly important. When chemical safety evaluation is carried out, the reaction characteristics of substances are fully known to be the basis of the safety evaluation, and abnormal working conditions possibly occurring in the process are quantitatively described by combining a cooling failure model, so that corresponding measures are taken to avoid harm or reduce the severity of the harm. Therefore, the temperature, pressure, temperature rise rate and pressure rise rate of the material during the secondary reaction need to be tested, which is called a thermal safety test.
At present, the thermal safety testing device of the existing material is mainly used for testing the thermal safety of conventional liquid, and when the thermal safety is tested, the existing thermal safety testing device of the material needs to continuously stir the material to be tested in order to ensure that the temperature of an object is uniformly distributed. However, in the process of implementing the invention, the inventor finds that, when the existing material thermal safety testing device is used for performing a thermal safety test on a solid or high-viscosity material (a material with a viscosity of not less than 500 cP), the solid or high-viscosity material cannot be stirred or is not stirred uniformly, so that the heat transfer of the material to be tested is limited, the temperature distribution of different parts is not uniform, the heat release time and the heat release rate of the material to be tested are influenced, and the testing accuracy is low.
Disclosure of Invention
The invention aims to overcome the defects that the material thermal safety testing device in the prior art cannot be applied to the test of fixed or high-viscosity materials and has low testing accuracy, and provides a material thermal safety testing device and a material thermal safety testing method.
The technical scheme of the invention provides a material thermal safety testing device, which comprises:
the material testing pool is used for containing a material to be tested, and a material temperature detecting assembly for detecting the real-time material temperature of the material to be tested, a material pressure sensor for detecting the pressure of the material to be tested and a gas phase temperature sensor for detecting the real-time gas phase temperature above the material to be tested are arranged in the material testing pool;
the device comprises a pressure-resistant container, wherein an accommodating cavity for installing the material testing pool is arranged in the middle of the pressure-resistant container, at least one layer of medium cavity is arranged between the inner side wall of the pressure-resistant container and the outer side wall of the accommodating cavity, a heat transfer medium, a heater for heating the heat transfer medium, a pressurizer for pressurizing the heat transfer medium, a medium temperature sensor for detecting the real-time medium temperature of the heat transfer medium and a medium pressure sensor for detecting the real-time medium pressure in the medium cavity are arranged in each layer of medium cavity;
and the controller is used for adjusting the real-time heating temperature of the heater and the real-time pressure of the pressurizer according to the real-time material temperature, the real-time material pressure, the real-time gas phase temperature, the real-time medium temperature and the real-time medium pressure.
Further, the material testing pool comprises a shell with a hollow cavity and a sealing cover, a material opening communicated with the hollow cavity is formed in the top of the shell, the sealing cover seals the material opening, and the material temperature detecting assembly, the material pressure sensor and the gas phase temperature sensor are arranged in the shell.
Furthermore, at least one layer of heat conducting assembly is arranged on the inner side wall of the shell, each layer of heat conducting assembly comprises a plurality of heat conducting fins, and the plurality of heat conducting fins are distributed along the circumferential direction of the hollow cavity.
Further, the material temperature detection assembly comprises:
the material center temperature sensor is in communication connection with the controller, is positioned in the center of the material testing pool and is used for detecting the real-time material center temperature of a center material to be tested in the center of the material testing pool;
the material periphery temperature sensor is in communication connection with the controller and used for detecting the material periphery real-time temperature of the peripheral material to be detected, which is away from the two thirds of the radius of the center of the central material to be detected.
Further, the adjusting the real-time heating temperature of the heater and the real-time pressure of the pressurizer according to the real-time material temperature, the real-time material pressure, the real-time gas phase temperature, the real-time medium temperature and the real-time medium pressure comprises:
taking the difference value between the real-time material temperature and a preset target material temperature as input, and calculating a target heating temperature by adopting a PID control algorithm;
and adjusting the real-time heating temperature according to the target heating temperature.
Further, the calculating the target heating temperature by using the difference between the real-time material temperature and the preset target material temperature as an input and adopting a PID control algorithm includes:
calculating the target heating temperature using the following formula:
wherein U (t) is the target heating temperature; kp is a proportionality constant; e (t) is the difference between the real-time temperature of the material and the target temperature of the material; ki is an integral constant; kd is the differential constant.
Further, the adjusting the real-time heating temperature of the heater and the real-time pressure of the pressurizer according to the real-time material temperature, the real-time material pressure, the real-time gas phase temperature, the real-time medium temperature and the real-time medium pressure comprises:
if the real-time temperature of the material is less than or equal to the real-time temperature of the gas phase, taking the difference value between the real-time temperature of the gas phase and the real-time temperature of the material as input, and calculating a target heating temperature of the gas phase by adopting a PID control algorithm;
and adjusting the real-time gas-phase heating temperature according to the target gas-phase heating temperature.
Further, the adjusting the real-time heating temperature of the heater and the real-time pressure of the pressurizer according to the real-time material temperature, the real-time material pressure, the real-time gas phase temperature, the real-time medium temperature and the real-time medium pressure comprises:
if the real-time temperature of the periphery of the material is larger than the real-time temperature of the center of the material, before the material to be detected releases heat, the historical temperature of the center of the material and the historical temperature of the periphery of the material are collected for multiple times according to a preset sampling temperature, a target heat transfer rate of the corresponding material to be detected to the material to be detected is calculated according to each historical temperature of the center of the material and each historical temperature of the periphery of the material, and the heating rate of the heater is adjusted according to the target heat transfer rate.
Further, the calculating a target heat transfer rate of the corresponding peripheral material to be measured transferring heat to the central material to be measured according to each historical material temperature and each historical material temperature around the central material includes:
calculating corresponding historical heat transfer rate and historical heat conductivity according to the historical temperature of each material center and the historical temperature of each material periphery;
fitting the historical heat transfer rate, the historical thermal conductivity coefficient and a preset heat transfer rate function to obtain the thermal conductivity and the temperature coefficient of the solid of the preset heat transfer rate function at 0 ℃;
and calculating the target heat transfer rate according to the thermal conductivity, the temperature coefficient and the preset heat transfer rate function.
Further, the method of calculating the corresponding historical heat transfer rate and historical thermal conductivity according to the historical temperature of each material center and the historical temperature of each material periphery further comprises:
setting the historical heat transfer rate within a preset temperature threshold value as an initial historical heat transfer rate group within the time when the historical temperature of the material center is increased to the historical temperature of the periphery of the material, and acquiring the minimum historical heat transfer rate in the initial historical heat transfer rate group;
if the historical temperature of the material center is higher than the preset sampling temperature per liter, replacing the minimum historical heat transfer rate with the historical heat transfer rate corresponding to the preset sampling temperature per liter to generate a target historical heat transfer rate group;
the step of fitting the historical heat transfer rate, the historical heat conductivity coefficient and a preset heat transfer rate function to obtain the heat conductivity and the temperature coefficient of the solid of the preset heat transfer rate function at 0 ℃ comprises the following steps:
and fitting the target historical heat transfer rate group, the historical heat conductivity coefficient and the preset heat transfer rate function to obtain the heat conductivity and the temperature coefficient.
Further, the adjusting the real-time heating temperature of the heater and the real-time pressure of the pressurizer according to the real-time material temperature, the real-time material pressure, the real-time gas phase temperature, the real-time medium temperature and the real-time medium pressure comprises:
if the real-time temperature of the material center is the same as the real-time temperature of the periphery of the material, the real-time temperature of the material center is the same as the real-time temperature of the gas phase of each layer, the preset sampling temperature is increased within the preset time threshold, and the real-time heating temperature is adjusted to be the same as the real-time temperature of the material.
The technical scheme of the invention also provides a testing method of the material thermal safety testing device, which comprises the following steps:
acquiring the real-time material temperature, the real-time material pressure, the real-time gas phase temperature above the material to be detected, and the real-time medium temperature and the real-time medium pressure of a heat transfer medium in at least one layer of medium cavity;
and adjusting the real-time heating temperature of the heater and the real-time pressure of the pressurizer according to the real-time material temperature, the real-time material pressure, the real-time gas phase temperature, the real-time medium temperature and the real-time medium pressure.
Further, the adjusting of the real-time heating temperature of the heater and the real-time pressure of the pressurizer according to the real-time material temperature, the real-time material pressure, the real-time gas phase temperature, the real-time medium temperature and the real-time medium pressure comprises:
taking the difference value between the real-time material temperature and a preset target material temperature as input, and calculating a target heating temperature by adopting a PID control algorithm;
and adjusting the real-time heating temperature according to the target heating temperature.
Further, the calculating the target heating temperature by using the difference value between the real-time material temperature and the preset target material temperature as an input and adopting a PID control algorithm includes:
calculating the target heating temperature using the following formula:
wherein U (t) is the target heating temperature; kp is a proportionality constant; e (t) is the difference between the real-time temperature of the material and the target temperature of the material; ki is an integral constant; kd is the differential constant.
Further, the adjusting the real-time heating temperature of the heater and the real-time pressure of the pressurizer according to the real-time material temperature, the real-time material pressure, the real-time gas phase temperature, the real-time medium temperature and the real-time medium pressure comprises:
and if the real-time temperature of the material is greater than the target temperature of the material, reducing the heating temperature.
Further, the adjusting the real-time heating temperature of the heater and the real-time pressure of the pressurizer according to the real-time material temperature, the real-time material pressure, the real-time gas phase temperature, the real-time medium temperature and the real-time medium pressure comprises:
if the real-time temperature of the material is less than or equal to the real-time temperature of the gas phase, taking the difference value between the real-time temperature of the gas phase and the real-time temperature of the material as input, and calculating a target heating temperature of the gas phase by adopting a PID control algorithm;
and adjusting the real-time gas-phase heating temperature according to the target gas-phase heating temperature.
Further, the material that awaits measuring includes the central material that awaits measuring and the peripheral material that awaits measuring, the peripheral material that awaits measuring is the distance the material outside the two-thirds radius at the center of the central material that awaits measuring, material real-time temperature include with the material center real-time temperature that the central material that awaits measuring corresponds and with the peripheral real-time temperature of the material that awaits measuring corresponds, according to material real-time temperature material real-time pressure material gas phase real-time temperature medium real-time temperature with the real-time heating temperature of the real-time pressure regulation heater of medium and the real-time pressure of presser include:
if the real-time temperature of the periphery of the material is larger than the real-time temperature of the center of the material, before the material to be detected releases heat, the historical temperature of the center of the material and the historical temperature of the periphery of the material are collected for multiple times according to a preset sampling temperature within a preset temperature threshold value, a target heat transfer rate of the corresponding peripheral material to be detected transferring heat to the material of the center to be detected is calculated according to each historical temperature of the center of the material and each historical temperature of the periphery of the material, and the heating rate of the heater is adjusted according to the target heat transfer rate.
Further, the calculating a target heat transfer rate of the corresponding to-be-measured peripheral material to the to-be-measured central material according to each material center historical temperature and each material periphery historical temperature includes:
calculating corresponding historical heat transfer rate and historical heat conductivity coefficient according to each historical material center temperature and each historical material periphery temperature;
fitting the historical heat transfer rate, the historical heat conductivity coefficient and a preset heat transfer rate function to obtain the heat conductivity and the temperature coefficient of the solid of the preset heat transfer rate function at 0 ℃;
and calculating the target heat transfer rate according to the thermal conductivity of the solid at 0 ℃, the temperature coefficient and the preset heat transfer rate function.
Further, the calculating of the corresponding historical heat transfer rate and historical thermal conductivity according to the historical temperature of each material center and the historical temperature of each material periphery further includes:
setting the historical heat transfer rate within a preset temperature threshold value as an initial historical heat transfer rate group within the time when the historical temperature of the material center is increased to the historical temperature of the periphery of the material, and acquiring the minimum historical heat transfer rate in the initial historical heat transfer rate group;
if the historical temperature of the material center is higher than the preset sampling temperature per liter, replacing the minimum historical heat transfer rate with the historical heat transfer rate corresponding to the preset sampling temperature per liter to generate a target historical heat transfer rate group;
the step of fitting the historical heat transfer rate, the historical thermal conductivity coefficient and a preset heat transfer rate function to obtain the thermal conductivity and the temperature coefficient of the solid of the preset heat transfer rate function at 0 ℃ comprises the following steps:
and fitting the target historical heat transfer rate group, the historical heat conduction coefficient and the preset heat transfer rate function to obtain the heat conductivity and the temperature coefficient.
Further, the adjusting the real-time heating temperature of the heater and the real-time pressure of the pressurizer according to the real-time material temperature, the real-time material pressure, the real-time gas phase temperature, the real-time medium temperature and the real-time medium pressure comprises:
if the real-time temperature of the material center is the same as the real-time temperature of the periphery of the material, the real-time temperature of the material center is the same as the real-time temperature of the gas phase on each layer, the preset sampling temperature is increased within the preset time threshold, and the real-time heating temperature is adjusted to be the same as the real-time temperature of the material.
After adopting above-mentioned technical scheme, have following beneficial effect: the material testing pool for containing the materials to be tested is placed in the containing cavity of the pressure container, the real-time heating temperature of the heater and the real-time pressure of the pressurizer are adjusted according to the real-time material temperature, the real-time material pressure, the real-time gas phase temperature, the real-time medium temperature and the real-time medium pressure, the materials to be tested at different positions can be heated and pressurized when the thermal safety test is carried out, the heat distribution of the materials to be tested is uniform, the materials to be tested do not need to be stirred, the material testing pool is suitable for different types of materials, the testing accuracy is improved, meanwhile, the materials to be tested can form an adiabatic environment through the material testing pool and the pressure container, and the testing accuracy is further improved.
Drawings
The disclosure of the present invention will become more readily understood by reference to the drawings. It should be understood that: these drawings are for illustrative purposes only and are not intended to limit the scope of the present disclosure. In the figure:
fig. 1 is a schematic structural diagram of a material thermal safety testing apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of the material testing tank shown in FIG. 1;
FIG. 3 is a schematic structural diagram of a heat conducting assembly of the material thermal safety testing apparatus shown in FIG. 1;
fig. 4 is a flowchart illustrating a testing method of a material thermal safety testing apparatus according to an embodiment of the present invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings.
It is easily understood that, according to the technical solution of the present invention, a person skilled in the art can substitute various structural modes and implementation modes with each other without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as limiting or restricting the technical aspects of the present invention.
The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.
As shown in fig. 1 to fig. 3, a material thermal safety testing apparatus according to an embodiment of the present invention includes:
the material testing pool 10 is used for containing materials to be tested, and a material temperature detecting assembly for detecting the real-time material temperature of the materials to be tested, a material pressure sensor for detecting the pressure of the materials to be tested and a gas phase temperature sensor for detecting the real-time gas phase temperature above the materials to be tested are arranged in the material testing pool 10;
the device comprises a pressure container 20, wherein an accommodating cavity for installing a material testing pool is arranged in the middle of the pressure container 20, at least one layer of medium cavity is arranged between the inner side wall of the pressure container 20 and the outer side wall of the accommodating cavity, a heat transfer medium, a heater for heating the heat transfer medium, a pressurizer for pressurizing the heat transfer medium, a medium temperature sensor for detecting the real-time temperature of the medium of the heat transfer medium and a medium pressure sensor for detecting the real-time pressure of the medium in the medium cavity are arranged in each layer of medium cavity;
and the controller 30 is used for adjusting the real-time heating temperature of the heater and the real-time pressure of the pressurizer according to the real-time material temperature, the real-time gas phase temperature, the real-time medium temperature and the real-time medium pressure.
The material thermal safety testing device provided by the embodiment mainly comprises a material testing pool 10, a pressure container 20 and a controller 30.
The material testing tank 10 is in a cylindrical shape, and the material testing tank 10 is used for containing materials to be tested, such as liquid materials, solid materials, high-viscosity materials and the like. A material temperature detection assembly and a gas phase temperature sensor are arranged in the material testing pool 10, the material temperature detection assembly is used for detecting the real-time material temperature of the material to be tested, and the gas phase temperature sensor is used for detecting the real-time gas phase temperature above the material to be tested. The gas phase real-time temperature is the real-time temperature of the space (i.e. gas phase space) in the material testing tank 10, which is not filled with the material to be tested.
The pressure container 20 is also cylindrical, a containing cavity is arranged in the middle of the pressure container 20, and during testing, a material to be tested is placed into the material testing pool 10, and then the material testing pool 10 is placed in the containing cavity. At least one layer of medium chamber is arranged between the inner side wall of the pressure container 20 and the outer side wall of the accommodating cavity, and a heat transfer medium, a heater, a pressurizer, a medium temperature sensor and a medium pressure sensor are arranged in each layer of medium chamber. The heat transfer medium is filled between the inner side wall of the pressure container 20 and the outer side wall of the accommodating cavity, so that a gap is formed between the inner side wall of the pressure container 20 and the outer side wall of the accommodating cavity, and a heat insulation environment is provided for the material to be detected.
The controller 30 is respectively in communication connection with the material temperature detection assembly, the gas phase temperature sensor, the heater, the pressurizer, the medium temperature sensor and the medium pressure sensor, and the controller 30 is used for adjusting real-time heating temperature and real-time pressure according to real-time material temperature, real-time gas phase temperature and real-time medium temperature so as to control the temperature and pressure of the heat transfer medium and control the temperature and pressure of the material to be detected through the heat transfer medium.
Preferably, controller 30 is a Programmable Logic Controller (PLC)
Preferably, the controller 30 controls the pressure difference between the real-time pressure of the material and the real-time pressure of the medium to be 0.5bar-3bar.
Preferably, the controller 30 controls the temperature difference between the real-time temperature of the material and the real-time temperature of the medium to be 0.1 ℃ to 0.5 ℃.
Preferably, in order to make the material that awaits measuring be heated more evenly, further improve the test accuracy, the quantity of medium cavity is the multilayer, and multilayer medium cavity is followed the axial extension in holding chamber, and is equipped with the insulating layer between the adjacent medium cavity.
The number of the medium cavities is related to the height of the material to be detected, the higher the height of the material to be detected is, the more the number of layers of the medium cavities is, and the number of the medium cavities can be set according to the requirements of users. When the quantity of medium cavity was the multilayer, multilayer medium cavity extended along the axial (direction of height) of holding chamber, set up the insulating layer between every adjacent layer of medium cavity, prevented temperature and pressure in the adjacent medium cavity influence each other, can carry out independent control to the heat transfer medium in the different layers through multilayer medium cavity, further improved the test accuracy.
Preferably, in order to further improve the heat insulation effect, a heat insulation layer is provided on the inner sidewall of the pressure-resistant container 20.
It should be noted that the shape of the material testing cell 10 and the pressure-resistant container 20 may also be other shapes, such as a long strip, a square, etc.
According to the embodiment of the invention, the material testing pool for containing the materials to be tested is placed in the containing cavity of the pressure-resistant container, the real-time heating temperature of the heater and the real-time pressure of the pressurizer are adjusted by the controller according to the real-time temperature of the materials, the real-time pressure of the materials, the real-time temperature of the gas phase, the real-time temperature of the medium and the real-time pressure of the medium, the materials to be tested at different parts can be heated and pressurized during the thermal safety test, the heat of the materials to be tested is uniformly distributed, the materials to be tested do not need to be stirred, the material testing pool is suitable for different types of materials, the testing accuracy is improved, and meanwhile, the material testing pool and the pressure-resistant container can form an adiabatic environment for the materials to be tested, so that the testing accuracy is further improved.
In one embodiment, as shown in fig. 2, the material testing tank 10 includes a housing 11 having a hollow cavity, and a sealing cover 12, a material port communicating with the hollow cavity is formed at the top of the housing 11, the sealing cover 12 seals the material port, and a material temperature detecting assembly, a material pressure sensor and a gas phase temperature sensor are arranged in the housing 11.
The material testing cell 10 includes a housing 11 and a sealing lid 12. The material of the shell 11 can be 304 stainless steel, 316L stainless steel, etc., the wall thickness of the shell 11 is 0.1mm-0.3mm, and the pressure which can be borne by the shell 11 is less than or equal to 3bar. The top of casing 11 is equipped with the material mouth, is convenient for put the material that awaits measuring, is equipped with the external screw thread on the lateral wall of material mouth, and the inside wall of sealed lid 12 is equipped with the internal thread that corresponds with the external screw thread, and sealed lid 12 closes on the material mouth through external screw thread and internal thread lid, and seals the material mouth.
Preferably, in order to further facilitate the loading of the material to be measured, the diameter of the material port is 1/5 of the diameter of the housing 11.
Preferably, in order to further improve the sealing performance, the material testing tank 10 further includes a sealing ring, and the material opening and the sealing cover 12 are sealed by the sealing ring.
In one embodiment, as shown in fig. 2 and 3, at least one layer of heat conducting assembly is disposed on the inner sidewall of the housing 11, each layer of heat conducting assembly includes a plurality of heat conducting fins 13, and the plurality of heat conducting fins 13 are distributed along the circumferential direction of the hollow cavity.
The number of heat conducting components is related to the diameter of the housing 11, the larger the number of heat conducting components. The heat conducting fins 13 are used for transferring heat of the heat transfer medium to the material to be measured or transferring heat of the material to be measured to the heat transfer medium, so that the heat conducting rate is improved.
Preferably, in order to fix the heat conducting fin, the heat conducting assembly further comprises a clamping groove corresponding to the heat conducting fin 13, the heat conducting fin 13 is clamped with the clamping groove, one end of the clamping groove is connected with the inner side wall of the shell 11, and the clamping groove enables the heat conducting fin 13 to point to the center of the shell 11.
Preferably, in order to further increase the heat conduction rate, the number of the heat conduction assemblies is multiple layers, and the multiple layers of the heat conduction assemblies extend along the axial direction of the hollow cavity.
Preferably, the heat conductive sheet 13 is a metal sheet in order to facilitate heat conduction.
Preferably, the heat conductive sheet 13 has a shape of a flat sheet, a corrugated sheet, a perforated sheet, or a bumped irregular sheet.
In one embodiment, in order to detect the temperature of the material to be detected more accurately and further improve the test accuracy, the material temperature detecting assembly includes:
the material center temperature sensor 14 is in communication connection with the controller 30, the material center temperature sensor 14 is located in the center of the material testing pool 10, and the material center temperature sensor 14 is used for detecting the material center real-time temperature of a center material to be tested in the center of the material testing pool 10;
and the material periphery temperature sensor is in communication connection with the controller 30 and is used for detecting the material periphery real-time temperature of the peripheral material to be detected outside two thirds of the radius away from the center of the central material to be detected.
The material center temperature sensor 14 may be disposed at the center of the sealing cover 12, and the material center temperature sensor 14 is used for detecting the material center real-time temperature of the central material to be detected at the center of the material testing tank 10.
The material periphery temperature sensor is arranged outside the two-thirds radius of the center of the shell 11 and is used for measuring the material periphery real-time temperature of the periphery material to be measured.
In one embodiment, in order to control the temperature of the material to be tested more accurately and further improve the testing accuracy, the adjusting the real-time heating temperature of the heater and the real-time pressure of the pressurizer according to the real-time material temperature, the real-time material pressure, the real-time gas phase temperature, the real-time medium temperature and the real-time medium pressure comprises:
taking the difference value between the real-time temperature of the material and the preset target temperature of the material as input, and calculating the target heating temperature by adopting a PID control algorithm;
and adjusting the real-time heating temperature according to the target heating temperature.
Specifically, the target material temperature may be preset in the controller 30 according to a user requirement, the controller 30 uses a difference between the real-time material temperature and the preset target material temperature as an input, calculates a target heating temperature of the heater by using a PID control algorithm, and then adjusts the real-time heating temperature of the heater according to the target heating temperature.
In one embodiment, in order to further improve the test accuracy, the calculating a target heating temperature by using a PID control algorithm with a difference between the real-time material temperature and a preset target material temperature as an input includes:
calculating the target heating temperature by adopting the following formula:
wherein U (t) is a target heating temperature; kp is a proportionality constant; e (t) is the difference value between the real-time temperature of the material and the target temperature of the material; ki is an integral constant; kd is the differential constant.
Kp, ki and Kd can be set according to user requirements.
In one embodiment, in order to control the temperature of the material to be tested more accurately and further improve the testing accuracy, the adjusting the real-time heating temperature of the heater and the real-time pressure of the pressurizer according to the real-time material temperature, the real-time material pressure, the real-time gas phase temperature, the real-time medium temperature and the real-time medium pressure comprises:
if the real-time temperature of the material is less than or equal to the real-time temperature of the gas phase, taking the difference value of the real-time temperature of the gas phase and the real-time temperature of the material as input, and calculating the target heating temperature of the gas phase by adopting a PID control algorithm;
and adjusting the real-time gas-phase heating temperature according to the target gas-phase heating temperature.
In one embodiment, in order to control the temperature of the material to be measured more accurately and further improve the accuracy of the test, the adjusting the real-time heating temperature of the heater and the real-time pressure of the pressurizer according to the real-time material temperature, the real-time material pressure, the real-time gas phase temperature, the real-time medium temperature and the real-time medium pressure comprises:
if the real-time temperature of the periphery of the material is larger than the real-time temperature of the center of the material, before the material to be detected releases heat, the historical temperature of the center of the material and the historical temperature of the periphery of the material to be detected are collected for multiple times according to a preset sampling temperature, the target heat transfer rate of the corresponding material to be detected to the material of the center to be detected is calculated according to the historical temperature of the center of each material and the historical temperature of the periphery of each material, and the heating rate of the heater is adjusted according to the target heat transfer rate.
If the real-time temperature of the periphery of the material is greater than the real-time temperature of the center of the material, before the material to be tested releases heat, the historical temperature of the center of the material and the historical temperature of the periphery of the material to be tested are collected according to a preset sampling temperature, for example, the historical temperature of the center of the material and the historical temperature of the periphery of the material to be tested are collected once at every 2 ℃, then the target heat transfer rate of the corresponding peripheral material to be tested transferring heat to the central material to be tested is calculated according to the historical temperature of the center of each material and the historical temperature of the periphery of each material, the heating rate of the heater is adjusted according to the target heat transfer rate, therefore, the change trend of the next temperature difference can be predicted in advance, the heating rate of the heater can be adjusted in time, and the testing accuracy is further improved.
The heat release of the material to be detected means that the real-time temperature of the material to be detected continues to rise within a preset time period when the heat transfer medium does not heat the material to be detected any more.
In one embodiment, in order to control the temperature of the material to be measured more accurately and further improve the test accuracy, the calculating, according to the historical temperature of each material center and the historical temperature of each material periphery, a target heat transfer rate of the corresponding material to be measured to transfer heat to the material to be measured at the periphery includes:
calculating corresponding historical heat transfer rate and historical heat conductivity coefficient according to the historical temperature of the center of each material and the historical temperature of the periphery of each material;
fitting the historical heat transfer rate, the historical heat conductivity coefficient and a preset heat transfer rate function to obtain the heat conductivity and the temperature coefficient of the solid with the preset heat transfer rate function at 0 ℃;
and calculating the target heat transfer rate according to the heat conductivity, the temperature coefficient and a preset heat transfer rate function.
Specifically, a historical temperature difference value between the historical temperature of each material center and the historical temperature of the periphery of each material is calculated, a corresponding historical heat transfer rate q is obtained according to the historical temperature difference value, and then a historical heat conductivity coefficient lambda is calculated according to the following formula:
then, fitting the historical heat transfer rate q, the historical heat conductivity coefficient lambda and a preset heat transfer rate function to obtain the heat conductivity lambda 0 And temperature coefficient a, the preset heat transfer rate function is as follows:
λ＝λ 0 *(1+a*t)
in one embodiment, in order to control the temperature of the material to be tested more accurately and further improve the testing accuracy, the calculating the corresponding historical heat transfer rate and the historical thermal conductivity coefficient according to the historical temperature of each material center and the historical temperature of each material periphery further includes:
setting the historical heat transfer rate within a preset temperature threshold value as an initial historical heat transfer rate group within the time when the historical temperature of the material center is increased to the historical temperature of the periphery of the material, and acquiring the minimum historical heat transfer rate in the initial historical heat transfer rate group;
if the historical temperature of the material center is higher than a preset sampling temperature per liter, replacing the minimum historical heat transfer rate with the historical heat transfer rate corresponding to the preset sampling temperature per liter to generate a target historical heat transfer rate group;
the step of fitting the historical heat transfer rate, the historical heat conductivity coefficient and the preset heat transfer rate function to obtain the heat conductivity and the temperature coefficient of the solid with the preset heat transfer rate function at 0 ℃ comprises the following steps:
and fitting the target historical heat transfer rate group, the historical heat conductivity coefficient and a preset heat transfer rate function to obtain the heat conductivity and the temperature coefficient.
Since the heat transfer capacity among materials is changed due to the fact that the temperature of the materials is continuously changed in the temperature rising process, and the heat conduction coefficients corresponding to different temperatures are different, after the historical temperature of the center of the material is measured, in the time when the historical temperature of the center of the material is raised to the historical temperature of the periphery of the material, the historical heat transfer rate within a preset temperature threshold (such as 10 ℃) at the initial stage of the test is set as an initial historical heat transfer rate set, and the minimum historical heat transfer rate in the initial historical heat transfer rate set is obtained; then when the historical temperature of the material center is higher than a preset sampling temperature (such as 2 ℃) per liter, replacing the minimum historical heat transfer rate with the historical heat transfer rate corresponding to the preset sampling temperature per liter to generate a new set of target historical heat transfer rate set; and finally, fitting the target historical heat transfer rate group, the historical heat conductivity coefficient and a preset heat transfer rate function to obtain the heat conductivity and the temperature coefficient.
In one embodiment, in order to control the temperature of the material to be tested more accurately and further improve the testing accuracy, the adjusting the real-time heating temperature of the heater and the real-time pressure of the pressurizer according to the real-time material temperature, the real-time material pressure, the real-time gas phase temperature, the real-time medium temperature and the real-time medium pressure comprises:
if the real-time temperature of the center of the material is the same as the real-time temperature of the periphery of the material, the real-time temperature of each layer of gas phase is the same, the preset sampling temperature is increased within the preset time threshold, and the real-time heating temperature is adjusted to be the same as the real-time temperature of the material.
As shown in fig. 4, fig. 4 is a flowchart of a testing method of the material thermal safety testing apparatus according to an embodiment of the present invention, including:
step S401: acquiring the real-time material temperature, the real-time material pressure, the real-time gas phase temperature above the material to be detected, and the real-time medium temperature and the real-time medium pressure of the heat transfer medium in at least one layer of medium cavity;
step S402: and adjusting the real-time heating temperature of the heater and the real-time pressure of the pressurizer according to the real-time temperature of the material, the real-time pressure of the material, the real-time temperature of the gas phase, the real-time temperature of the medium and the real-time pressure of the medium.
Specifically, when the thermal safety of the material to be tested needs to be tested, the controller executes step S401 to obtain the material real-time temperature, the material real-time pressure, the gas phase real-time temperature above the material to be tested, and the medium real-time temperature and the medium real-time pressure of the heat transfer medium in the at least one layer of medium cavity; and then executing a step S402 of adjusting the real-time heating temperature of the heater and the real-time pressure of the pressurizer according to the real-time material temperature, the real-time material pressure, the real-time gas phase temperature, the real-time medium temperature and the real-time medium pressure.
According to the embodiment of the invention, the real-time temperature of the material, the real-time pressure of the material, the real-time temperature of the gas phase, the real-time temperature of the medium and the real-time pressure of the medium are obtained, and the real-time heating temperature of the heater and the real-time pressure of the pressurizer are adjusted according to the real-time temperature of the material, the real-time pressure of the material, the real-time temperature of the gas phase, the real-time temperature of the medium and the real-time pressure of the medium, so that the material to be tested at different positions can be heated and pressurized during the thermal safety test, the heat distribution of the material to be tested is uniform, the material to be tested does not need to be stirred, the device is suitable for different types of materials, the test accuracy is improved, and meanwhile, the material to be tested can form an adiabatic environment through the material test pool and the pressure-resistant container, and the test accuracy is further improved.
In one embodiment, in order to control the temperature of the material to be tested more accurately and further improve the testing accuracy, step S402 includes:
taking the difference value between the real-time temperature of the material and the preset target temperature of the material as input, and calculating the target heating temperature by adopting a PID control algorithm;
and adjusting the real-time heating temperature according to the target heating temperature.
In one embodiment, in order to control the temperature of the material to be tested more accurately and further improve the testing accuracy, the calculating the target heating temperature by using the PID control algorithm with the difference between the real-time temperature of the material and the preset target temperature of the material as input includes:
calculating the target heating temperature by adopting the following formula:
wherein U (t) is a target heating temperature; kp is a proportionality constant; e (t) is the difference between the real-time temperature of the material and the target temperature of the material; ki is an integral constant; kd is the differential constant.
In one embodiment, in order to control the temperature of the material to be tested more accurately and further improve the testing accuracy, step S402 includes:
and if the real-time temperature of the material is higher than the target temperature of the material, reducing the heating temperature.
In one embodiment, in order to control the temperature of the material to be tested more accurately and further improve the testing accuracy, step S402 includes:
if the real-time temperature of the material is less than or equal to the real-time temperature of the gas phase, taking the difference value of the real-time temperature of the gas phase and the real-time temperature of the material as input, and calculating the target heating temperature of the gas phase by adopting a PID control algorithm;
and adjusting the real-time gas phase heating temperature according to the target gas phase heating temperature.
In one embodiment, in order to control the temperature of the material to be tested more accurately and further improve the testing accuracy, the material to be tested includes a central material to be tested and a peripheral material to be tested, the peripheral material to be tested is a material outside a two-thirds radius from the center of the central material to be tested, the real-time material temperature includes a real-time material center temperature corresponding to the central material to be tested and a real-time material peripheral temperature corresponding to the peripheral material to be tested, and the step S402 includes:
if the real-time temperature of the periphery of the material is larger than the real-time temperature of the center of the material, before the material to be detected releases heat, the historical temperature of the center of the material and the historical temperature of the periphery of the material are collected for multiple times according to the preset sampling temperature within the preset temperature threshold value, the target heat transfer rate of the corresponding material to be detected to the material to be detected is calculated according to the historical temperature of the center of each material and the historical temperature of the periphery of each material, and the heating rate of the heater is adjusted according to the target heat transfer rate.
In one embodiment, in order to control the temperature of the material to be measured more accurately and further improve the measurement accuracy, the calculating a target heat transfer rate of the corresponding material to be measured to the material to be measured from each material center historical temperature and each material periphery historical temperature includes:
calculating corresponding historical heat transfer rate and historical heat conductivity coefficient according to the historical temperature of each material center and the historical temperature of the periphery of each material;
fitting the historical heat transfer rate, the historical heat conductivity coefficient and a preset heat transfer rate function to obtain the heat conductivity and the temperature coefficient of the solid with the preset heat transfer rate function at 0 ℃;
and calculating the target heat transfer rate according to the thermal conductivity of the solid at 0 ℃, the temperature coefficient and a preset heat transfer rate function.
In one embodiment, in order to control the temperature of the material to be tested more accurately and further improve the testing accuracy, the calculating the corresponding historical heat transfer rate and the historical thermal conductivity coefficient according to the historical temperature of each material center and the historical temperature of each material periphery further includes:
setting the historical heat transfer rate within a preset temperature threshold value as an initial historical heat transfer rate group within the time when the historical temperature of the material center is increased to the historical temperature of the periphery of the material, and acquiring the minimum historical heat transfer rate in the initial historical heat transfer rate group;
if the historical temperature of the material center is higher than the preset sampling temperature per liter, replacing the minimum historical heat transfer rate with the historical heat transfer rate corresponding to the preset sampling temperature per liter to generate a target historical heat transfer rate group;
the step of fitting the historical heat transfer rate, the historical heat conductivity coefficient and a preset heat transfer rate function to obtain the heat conductivity and the temperature coefficient of the solid of the preset heat transfer rate function at 0 ℃ comprises the following steps:
and fitting the target historical heat transfer rate group, the historical heat conduction coefficient and the preset heat transfer rate function to obtain the heat conductivity and the temperature coefficient.
In one embodiment, in order to control the temperature of the material to be tested more accurately and further improve the testing accuracy, step S402 includes:
if the real-time temperature of the center of the material is the same as the real-time temperature of the periphery of the material, the real-time temperature of each layer of gas phase is the same, the preset sampling temperature is increased within the preset time threshold, and the real-time heating temperature is adjusted to be the same as the real-time temperature of the material.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and not to limit the same; although embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (20)
1. The utility model provides a material thermal safety nature testing arrangement which characterized in that includes:
the material testing pool is used for containing a material to be tested, and a material temperature detecting assembly for detecting the real-time temperature of the material to be tested, a material pressure sensor for detecting the pressure of the material to be tested and a gas phase temperature sensor for detecting the real-time temperature of a gas phase above the material to be tested are arranged in the material testing pool;
the device comprises a pressure-resistant container, wherein an accommodating cavity for installing the material testing pool is arranged in the middle of the pressure-resistant container, at least one layer of medium cavity is arranged between the inner side wall of the pressure-resistant container and the outer side wall of the accommodating cavity, a heat transfer medium, a heater for heating the heat transfer medium, a pressurizer for pressurizing the heat transfer medium, a medium temperature sensor for detecting the real-time temperature of the heat transfer medium and a medium pressure sensor for detecting the real-time pressure of the medium in the medium cavity are arranged in each layer of medium cavity;
and the controller is used for adjusting the real-time heating temperature of the heater and the real-time pressure of the pressurizer according to the real-time material temperature, the real-time material pressure, the real-time gas phase temperature, the real-time medium temperature and the real-time medium pressure.
2. The material thermal safety testing device according to claim 1, wherein the material testing tank comprises a housing having a hollow cavity and a sealing cover, a material opening is formed in the top of the housing and is communicated with the hollow cavity, the sealing cover seals the material opening, and the material temperature detecting assembly, the material pressure sensor and the gas phase temperature sensor are arranged in the housing.
3. The material thermal safety testing device according to claim 2, wherein at least one layer of heat conducting assembly is arranged on the inner side wall of the casing, each layer of heat conducting assembly comprises a plurality of heat conducting fins, and the plurality of heat conducting fins are distributed along the circumferential direction of the hollow cavity.
4. The material thermal safety testing device of claim 2, wherein the material temperature detection assembly comprises:
the material center temperature sensor is in communication connection with the controller, is positioned in the center of the material testing pool and is used for detecting the real-time material center temperature of a center material to be tested in the center of the material testing pool;
the material peripheral temperature sensor is in communication connection with the controller and used for detecting the material peripheral real-time temperature of the peripheral material to be detected, wherein the material peripheral temperature sensor is away from the two thirds of the radius of the center of the central material to be detected.
5. The material thermal safety testing device according to claim 4, wherein the adjusting of the real-time heating temperature of the heater and the real-time pressure of the pressurizer according to the real-time material temperature, the real-time material pressure, the real-time gas phase temperature, the real-time medium temperature and the real-time medium pressure comprises:
taking the difference value between the real-time material temperature and a preset target material temperature as input, and calculating a target heating temperature by adopting a PID control algorithm;
and adjusting the real-time heating temperature according to the target heating temperature.
6. The material thermal safety testing device according to claim 5, wherein the calculating of the target heating temperature by using the PID control algorithm with the difference between the real-time material temperature and the preset target material temperature as input comprises:
calculating the target heating temperature using the following formula:
wherein U (t) is the target heating temperature; kp is a proportionality constant; e (t) is the difference between the real-time temperature of the material and the target temperature of the material; ki is an integral constant; kd is the differential constant.
7. The material thermal safety testing device according to claim 5, wherein the adjusting of the real-time heating temperature of the heater and the real-time pressure of the pressurizer according to the real-time material temperature, the real-time material pressure, the real-time gas phase temperature, the real-time medium temperature and the real-time medium pressure comprises:
if the real-time temperature of the material is less than or equal to the real-time temperature of the gas phase, taking the difference value between the real-time temperature of the gas phase and the real-time temperature of the material as input, and calculating a target heating temperature of the gas phase by adopting a PID control algorithm;
and adjusting the real-time gas-phase heating temperature according to the target gas-phase heating temperature.
8. The material thermal safety testing device according to claim 5, wherein the adjusting of the real-time heating temperature of the heater and the real-time pressure of the pressurizer according to the real-time material temperature, the real-time material pressure, the real-time gas phase temperature, the real-time medium temperature and the real-time medium pressure comprises:
if the real-time temperature of the periphery of the material is larger than the real-time temperature of the center of the material, before the material to be detected releases heat, the historical temperature of the center of the material and the historical temperature of the periphery of the material are collected for multiple times according to a preset sampling temperature, a target heat transfer rate of the corresponding material to be detected to the material to be detected is calculated according to each historical temperature of the center of the material and each historical temperature of the periphery of the material, and the heating rate of the heater is adjusted according to the target heat transfer rate.
9. The material thermal safety testing device according to claim 8, wherein the calculating a corresponding target heat transfer rate of the peripheral material to be tested to the central material to be tested according to each historical material center temperature and each historical material periphery temperature comprises:
calculating corresponding historical heat transfer rate and historical heat conductivity according to the historical temperature of each material center and the historical temperature of each material periphery;
fitting the historical heat transfer rate, the historical thermal conductivity coefficient and a preset heat transfer rate function to obtain the thermal conductivity and the temperature coefficient of the solid of the preset heat transfer rate function at 0 ℃;
and calculating the target heat transfer rate according to the thermal conductivity, the temperature coefficient and the preset heat transfer rate function.
10. The material thermal safety testing device according to claim 9, wherein the step of calculating a corresponding historical heat transfer rate and a corresponding historical thermal conductivity according to each historical material center temperature and each historical material periphery temperature further comprises:
setting the historical heat transfer rate within a preset temperature threshold value as an initial historical heat transfer rate group within the time when the historical temperature of the material center is increased to the historical temperature of the periphery of the material, and acquiring the minimum historical heat transfer rate in the initial historical heat transfer rate group;
if the historical temperature of the material center is higher than the preset sampling temperature per liter, replacing the minimum historical heat transfer rate with the historical heat transfer rate corresponding to the preset sampling temperature per liter to generate a target historical heat transfer rate group;
the step of fitting the historical heat transfer rate, the historical heat conductivity coefficient and a preset heat transfer rate function to obtain the heat conductivity and the temperature coefficient of the solid of the preset heat transfer rate function at 0 ℃ comprises the following steps:
and fitting the target historical heat transfer rate group, the historical heat conduction coefficient and the preset heat transfer rate function to obtain the heat conductivity and the temperature coefficient.
11. The material thermal safety testing device according to claim 5, wherein the adjusting of the real-time heating temperature of the heater and the real-time pressure of the pressurizer according to the real-time material temperature, the real-time material pressure, the real-time gas phase temperature, the real-time medium temperature and the real-time medium pressure comprises:
if the real-time temperature of the material center is the same as the real-time temperature of the periphery of the material, the real-time temperature of the material center is the same as the real-time temperature of the gas phase on each layer, the preset sampling temperature is increased within the preset time threshold, and the real-time heating temperature is adjusted to be the same as the real-time temperature of the material.
12. A method for testing a material thermal safety testing device according to any one of claims 1 to 11, comprising:
acquiring the real-time material temperature, the real-time material pressure, the real-time gas phase temperature above the material to be detected, and the real-time medium temperature and the real-time medium pressure of a heat transfer medium in at least one layer of medium cavity;
and adjusting the real-time heating temperature of the heater and the real-time pressure of the pressurizer according to the real-time material temperature, the real-time material pressure, the real-time gas phase temperature, the real-time medium temperature and the real-time medium pressure.
13. The method of claim 12, wherein said adjusting the real-time heating temperature of the heater and the real-time pressure of the pressurizer based on the real-time temperature of the material, the real-time pressure of the material, the real-time temperature of the gas phase, the real-time temperature of the medium, and the real-time pressure of the medium comprises:
taking the difference value between the real-time material temperature and a preset target material temperature as input, and calculating a target heating temperature by adopting a PID control algorithm;
and adjusting the real-time heating temperature according to the target heating temperature.
14. The testing method of claim 13, wherein the calculating a target heating temperature using a PID control algorithm with a difference between the real-time material temperature and a preset target material temperature as an input comprises:
calculating the target heating temperature using the following formula:
wherein U (t) is the target heating temperature; kp is a proportionality constant; e (t) is the difference between the real-time temperature of the material and the target temperature of the material; ki is an integral constant; kd is the differential constant.
15. The method of claim 12, wherein said adjusting the real-time heating temperature of the heater and the real-time pressure of the pressurizer based on the real-time temperature of the material, the real-time pressure of the material, the real-time temperature of the gas phase, the real-time temperature of the medium, and the real-time pressure of the medium comprises:
and if the real-time temperature of the material is greater than the target temperature of the material, reducing the heating temperature.
16. The method of claim 12, wherein said adjusting the real-time heating temperature of the heater and the real-time pressure of the pressurizer based on the real-time temperature of the material, the real-time pressure of the material, the real-time temperature of the gas phase, the real-time temperature of the medium, and the real-time pressure of the medium comprises:
if the real-time temperature of the material is less than or equal to the real-time temperature of the gas phase, taking the difference value between the real-time temperature of the gas phase and the real-time temperature of the material as input, and calculating a target heating temperature of the gas phase by adopting a PID control algorithm;
and adjusting the real-time gas-phase heating temperature according to the target gas-phase heating temperature.
17. The testing method of claim 12, wherein the materials to be tested comprise a central material to be tested and peripheral materials to be tested, the peripheral materials to be tested are materials which are out of two-thirds of a radius from the center of the central material to be tested, the real-time material temperature comprises a real-time material center temperature corresponding to the central material to be tested and a real-time material periphery temperature corresponding to the peripheral materials to be tested, and the adjusting of the real-time heating temperature of the heater and the real-time pressure of the pressurizer according to the real-time material temperature, the real-time material pressure, the real-time gas phase temperature, the real-time medium temperature and the real-time medium pressure comprises:
if the real-time temperature of the periphery of the material is larger than the real-time temperature of the center of the material, before the material to be detected releases heat, the historical temperature of the center of the material and the historical temperature of the periphery of the material are collected for multiple times according to a preset sampling temperature, a target heat transfer rate of the corresponding material to be detected to the material to be detected is calculated according to each historical temperature of the center of the material and each historical temperature of the periphery of the material, and the heating rate of the heater is adjusted according to the target heat transfer rate.
18. The method for testing as claimed in claim 17, wherein said calculating a corresponding target heat transfer rate of said peripheral material to be tested to said central material to be tested based on each said material center historical temperature and each said material periphery historical temperature comprises:
calculating corresponding historical heat transfer rate and historical heat conductivity coefficient according to each historical material center temperature and each historical material periphery temperature;
fitting the historical heat transfer rate, the historical heat conductivity coefficient and a preset heat transfer rate function to obtain the heat conductivity and the temperature coefficient of the solid of the preset heat transfer rate function at 0 ℃;
and calculating the target heat transfer rate according to the thermal conductivity, the temperature coefficient and the preset heat transfer rate function.
19. The method of testing as claimed in claim 18, wherein said calculating a corresponding historical heat transfer rate and historical thermal conductivity based on each said historical temperature of the center of the material and each said historical temperature of the periphery of the material, further comprises:
setting the historical heat transfer rate within a preset temperature threshold value as an initial historical heat transfer rate group within the time when the historical temperature of the material center is increased to the historical temperature of the periphery of the material, and acquiring the minimum historical heat transfer rate in the initial historical heat transfer rate group;
if the historical temperature of the material center is higher than the preset sampling temperature per liter, replacing the minimum historical heat transfer rate with the historical heat transfer rate corresponding to the preset sampling temperature per liter to generate a target historical heat transfer rate group;
the step of fitting the historical heat transfer rate, the historical heat conductivity coefficient and a preset heat transfer rate function to obtain the heat conductivity and the temperature coefficient of the solid of the preset heat transfer rate function at 0 ℃ comprises the following steps:
and fitting the target historical heat transfer rate group, the historical heat conduction coefficient and the preset heat transfer rate function to obtain the heat conductivity and the temperature coefficient.
20. The method of testing of claim 17, wherein said adjusting the real-time heating temperature of the heater and the real-time pressure of the pressurizer based on the real-time temperature of the material, the real-time pressure of the material, the real-time temperature of the gas phase, the real-time temperature of the medium, and the real-time pressure of the medium comprises:
if the real-time temperature of the material center is the same as the real-time temperature of the periphery of the material, the real-time temperature of the material center is the same as the real-time temperature of the gas phase on each layer, the preset sampling temperature is increased within the preset time threshold, and the real-time heating temperature is adjusted to be the same as the real-time temperature of the material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211636792.2A CN115902119A (en) | 2022-12-16 | 2022-12-16 | Material thermal safety testing device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211636792.2A CN115902119A (en) | 2022-12-16 | 2022-12-16 | Material thermal safety testing device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115902119A true CN115902119A (en) | 2023-04-04 |
Family
ID=86478056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211636792.2A Pending CN115902119A (en) | 2022-12-16 | 2022-12-16 | Material thermal safety testing device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115902119A (en) |
-
2022
- 2022-12-16 CN CN202211636792.2A patent/CN115902119A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108775971A (en) | A kind of measurement method of temperature measuring equipment and specific heat capacity and thermal conductivity | |
| CN101354365B (en) | Heat measuring system | |
| CN104459323A (en) | Humiture controllable conductivity testing device and operation method thereof | |
| CN102519833A (en) | Complete immersion type online vacuum stability tester | |
| US7320245B2 (en) | Corrosion testing apparatus | |
| CN209132206U (en) | A kind of electrolysis unit of temperature-controllable | |
| CN115902119A (en) | Material thermal safety testing device and method | |
| CN201304340Y (en) | Heat pipe-based temperature stabilization device | |
| CN102768085B (en) | Temperature sensor high-accuracy calibration device | |
| JP2007248462A (en) | Liquid level detector, and method therefor | |
| CN109916951A (en) | A kind of lithium battery diaphragm closed pore-broken film temperature detection device and its test method | |
| CN208721269U (en) | A kind of temperature measuring device | |
| CN101433867B (en) | Constant thermal apparatus based on hot pipe | |
| CN111174921A (en) | Water bath black body and infrared thermometer's water bath black body calibrator | |
| CN111965211A (en) | In-situ detection device and method for lithium salt concentration of lithium battery electrolyte | |
| CN102520085A (en) | Online vacuum stability test reactor | |
| CN215339704U (en) | Temperature titrator with heat preservation device | |
| CN114577847A (en) | Lithium battery charging and discharging heat production measuring method based on isothermal differential calorimetry | |
| CN112730507B (en) | Liquid specific heat capacity measurement system and measurement method | |
| CN111020703B (en) | High-temperature vacuum furnace and semiconductor processing equipment | |
| KR101965805B1 (en) | Canister with improved thermal response | |
| CN201508294U (en) | Constant temperature measuring device of BOB online monitoring instrument | |
| CN111617724A (en) | Reaction kettle with built-in cooling and heating functions | |
| CN221124383U (en) | Asphalt softening point testing device | |
| CN219201432U (en) | Device for measuring specific heat capacity of low-temperature substance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |