CN116403740A - Heat loss compensation device and method for thermal experiment - Google Patents
Heat loss compensation device and method for thermal experiment Download PDFInfo
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- CN116403740A CN116403740A CN202310254642.3A CN202310254642A CN116403740A CN 116403740 A CN116403740 A CN 116403740A CN 202310254642 A CN202310254642 A CN 202310254642A CN 116403740 A CN116403740 A CN 116403740A
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Abstract
The invention relates to a heat loss compensation device and a heat loss compensation method for a thermal experiment. The first temperature measuring element is used for acquiring the temperature T1 of the component wall surface or the pipeline wall surface of the thermal experimental device. The second temperature measuring element is used for acquiring the temperature T2 of a heating zone formed by a heater, the heater is arranged near the wall surface of the part or near the wall surface of the pipeline, and the heating zone is the periphery of the wall surface of the part or the wall surface of the pipeline of the thermal experimental device. The control assembly is used for comparing and analyzing the received wall surface temperature T1 with the heating area temperature T2, and controlling the heating power of the heater by controlling the output signal of the power adjusting assembly so that the heating area temperature T2 follows the wall surface temperature T1. The invention can accurately compensate the heat loss of the whole thermal experimental device and each component in real time according to the experimental requirement, and has wide heat loss compensation range and flexible compensation mode.
Description
Technical Field
The invention relates to the technical field of heat loss compensation, in particular to a heat loss compensation device and a heat loss compensation method for a thermal experiment.
Background
A series of reactor thermal hydraulic experiment research works are required to be carried out in the processes of reactor research and development, safety evaluation, optimization improvement, reactor safety analysis software development and the like. Simulation of the boundary conditions of heat injection is required in the thermal hydraulic experiment of the reactor, and the simulation distortion of the thermal boundary influences the related experimental results.
Because the temperature of each equipment, pipeline and related accessories is higher than the ambient temperature in the experimental process, the experimental device has certain heat loss. Therefore, it is desirable to evaluate and minimize the effects of heat loss in a reasonable manner to obtain reasonable thermal boundary conditions.
The prior art mainly aims at measuring the heat loss of an experimental device to obtain the heat loss power under different temperature working conditions, so as to correct the effective heating power. The invention patent with the application number 201610524433.6 provides a heat loss testing method of a thermal comprehensive experimental device. The method takes the stable maintenance of the system temperature as a judgment criterion for the thermodynamic comprehensive experiment device to reach a thermal equilibrium state, namely, the heating power is considered to be equal to the heat loss power at the moment, and then the total heat loss power of the experiment device is obtained. This approach does not capture the lost power of each device or component of the system. When the method is adopted to measure the heat loss power of the experimental device, the temperature distribution of the experimental device is different from the temperature distribution of the experimental device when the experimental device actually operates to carry out experimental study, so that a certain error exists between the measured value and the true value of the heat loss power of the experimental device.
The invention patent with the application number of 201510235059.3 provides a calibration method and a calibration device for heat loss of a gas-liquid two-phase thermal experiment. According to the method, the heat dissipation capacity of the measured experimental section under different wall temperature conditions is obtained through a preheater, a flowmeter, pressure and temperature measuring points and other methods arranged in a loop, and then the relation between the wall temperature and the heat dissipation capacity is established. The method is mainly used for calibrating heat loss aiming at a single experimental section, so that the application range is limited. In the method, a preheater needs to be configured, the preheater needs to have enough heating power to ensure that the outlet temperature of the preheater can cover the experimental temperatures of different working conditions of an experimental section, and the outlet fluid of the preheater needs to be ensured to be in a single-phase state.
The method has the problems of complex composition of the heat loss measuring device, measurement under the condition of steady state, limited application range of the method, low measurement precision and the like, and the obtained thermal boundary condition of the experimental device is easy to be distorted.
Disclosure of Invention
The invention aims to solve the technical problem of providing a heat loss compensation device and a heat loss compensation method for a thermal experiment.
The technical scheme adopted for solving the technical problems is as follows: a heat loss compensation device for a thermal experiment comprises a control component, a power adjusting component, a heater, a first temperature measuring element and a second temperature measuring element.
The control assembly is respectively connected with the first temperature measuring element, the second temperature measuring element and the first end of the power adjusting assembly, and the second end of the power adjusting assembly is connected with the heater.
The first temperature measuring element is used for acquiring the temperature T1 of the component wall surface or the pipeline wall surface of the thermal experimental device.
The second temperature measuring element is used for acquiring the temperature T2 of a heating zone formed by the heater, wherein the heater is arranged near the part wall surface or near the pipeline wall surface, and the heating zone is the periphery of the part wall surface or the pipeline wall surface of the thermal experimental device.
The control component is used for controlling the heating power of the heater to enable the heating area temperature T2 to follow the wall surface temperature T1 by controlling the output signal of the power regulating component after comparing and analyzing the received wall surface temperature T1 with the heating area temperature T2.
Further, in the heat loss compensation device for thermal experiments according to the present invention, the control assembly is further configured to control the output signal of the power adjusting assembly to stop heating the heater when the heating zone temperature T2 exceeds a preset safety threshold.
Further, in the heat loss compensation device for thermal experiments according to the present invention, the control unit controls the output signal of the power adjusting unit to control the heating power of the heater so that the heating zone temperature T2 reaches the wall temperature T1, or
The heating zone temperature T2 is set within a preset fluctuation range of the wall temperature T1.
Further, in the heat loss compensation device for thermal experiments according to the present invention, the heat loss compensation device further comprises a first insulation layer, wherein the first insulation layer is wrapped on a wall surface of a component or a wall surface of a pipeline of the thermal experiment device and is interposed between the first temperature measurement element and the second temperature measurement element.
Further, in the heat loss compensation device for the thermal experiment, the thickness of the first heat insulation layer is between 10mm and 20 mm.
Further, in the heat loss compensation device for the thermal experiment, the heat loss compensation device further comprises a second heat insulation layer, and the second heat insulation layer is wrapped on the exposed outer surface of the heater.
Further, in the heat loss compensation device for thermal experiments according to the present invention, the heat loss compensation device further comprises a third temperature measuring element connected to the control assembly for obtaining the temperature T3 of the heater. The control assembly uses the heater temperature T3 to verify the accuracy of the heating zone temperature T2.
Further, in the heat loss compensation device for thermal experiments according to the present invention, the control component is further configured to control the output signal of the power adjusting component to stop heating the heater when the heater temperature T3 exceeds a preset safety threshold.
Further, in the heat loss compensation device for thermal experiments of the invention, the control assembly comprises a control cabinet and a controller, the controller is respectively connected with the first temperature measuring element, the second temperature measuring element and the power regulating assembly, and the control cabinet provides working power for the controller.
Further, in the heat loss compensation device for thermal experiments, the power adjusting assembly comprises a power adjusting cabinet and a power adjusting device, wherein the power adjusting device is connected with the heater, and the power adjusting cabinet provides a working power supply for the power adjusting device.
Further, in the heat loss compensating device for a thermal experiment according to the present invention, one of the components or the pipe is correspondingly provided with one of the heater, the first temperature measuring element and the second temperature measuring element; the output signal is an output current signal or an output voltage signal.
In addition, the invention also provides a heat loss compensation method for the thermal experiment, which comprises the following steps:
acquiring the temperature T1 of the part wall surface or the pipeline wall surface of the thermal experimental device and the temperature T2 of a heating zone formed by a heater; the heater is arranged near the part wall surface or near the pipeline wall surface, and the heating area is the periphery of the part wall surface or the pipeline wall surface of the thermal experimental device.
After the control component compares and analyzes the received wall surface temperature T1 with the heating zone temperature T2, the heating zone temperature T2 is enabled to follow the wall surface temperature T1 by controlling the heating power of the heater.
Further, in the heat loss compensation method of a thermal experiment according to the present invention, the controlling means for making the heating zone temperature T2 follow the wall temperature T1 by controlling the heating power of the heater includes:
the control component controls the heating power of the heater to enable the heating zone temperature T2 to reach the wall surface temperature T1 by controlling the output signal of the power regulating component, or
The heating zone temperature T2 is set within a preset fluctuation range of the wall temperature T1.
Wherein the output signal is an output current signal or an output voltage signal.
Further, in the heat loss compensation method for a thermal experiment according to the present invention, the method further comprises the steps of:
and when the heating zone temperature T2 exceeds a preset safety threshold, controlling an output signal of the power regulating assembly to stop heating of the heater.
Further, in the heat loss compensation method for a thermal experiment according to the present invention, the method further comprises the steps of:
and acquiring the temperature T3 of the heater, and correcting the accuracy of the temperature T2 of the heating zone by using the temperature T3 of the heater.
Further, in the heat loss compensation method for a thermal experiment according to the present invention, the method further comprises the steps of:
and when the temperature T3 of the heater exceeds a preset safety threshold, controlling an output signal of the power regulating assembly to stop heating the heater.
The implementation of the invention has the following beneficial effects: the invention can obtain the heat loss value of the thermal experimental device and each component according to the experimental requirement, accurately compensates the heat loss of any component or pipeline and the thermal experimental device in real time, has wide heat loss compensation range, can compensate the heat loss under any temperature condition, has flexible heat loss compensation mode, simple device composition and can be configured in a modularized way.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of a thermal loss compensation device for thermal experiments according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a thermal loss compensation device for thermal experiments according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an installation of a heat loss compensation device for a thermal experiment provided by an embodiment of the present invention;
FIG. 4 is a flow chart of a method of compensating for heat loss in a thermal experiment provided by an embodiment of the present invention;
FIG. 5 is a flow chart of a method of heat loss compensation for a thermal experiment provided by an embodiment of the present invention;
FIG. 6 is a flow chart of a method of heat loss compensation for a thermal experiment provided by an embodiment of the present invention;
FIG. 7 is a flow chart of a method for compensating heat loss in a thermal experiment provided by an embodiment of the invention.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings. The terms "first," "second," "third," and the like are used merely for convenience in describing the present invention and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby features defining "first," "second," "third," etc. may explicitly or implicitly include one or more such features. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In a preferred embodiment, referring to fig. 1, the heat loss compensating device for a thermal experiment of the present embodiment includes a control assembly 10, a power adjusting assembly 20, a heater 30, a first temperature measuring element 40, and a second temperature measuring element 50. Alternatively, the temperature measuring element of the present embodiment may employ a thermocouple, a thermal resistor, or the like according to the wall temperature range and the change characteristics.
The control assembly 10 is respectively connected with the first temperature measuring element 40, the second temperature measuring element 50 and the first end of the power adjusting assembly 20, and the second end of the power adjusting assembly 20 is connected with the heater 30.
The first temperature measuring element 40 is used for acquiring the temperature T1 of the component wall surface or the pipeline wall surface of the thermal experimental device. Specifically, the first temperature measuring element 40 is attached to the wall surface of a component of the thermal experimental device or the wall of the pipeline, and may be fixed to the wall surface by bonding or binding. The wall temperature T1 refers to the surface temperature of each component/device/pipe in the thermal experimental apparatus.
The second temperature measuring element 50 is configured to obtain the temperature T2 of the heating zone formed by the heater 30, where the heater 30 is disposed near the wall surface of the component or near the wall surface of the pipe, or the heater 30 is disposed at the periphery of the wall surface of the component or the periphery of the wall surface of the pipe, that is, the heater 30 is disposed near the wall surface, and the heating zone is the periphery of the wall surface of the component or the periphery of the wall surface of the pipe of the thermal experimental device, or the periphery formed by the heater 30 is the heating zone.
Preferably, in this embodiment, the heaters 30 may be arranged in a partitioned manner according to specific requirements of the thermal experiment and differences of equipment, components, temperature change characteristics and the like, that is, the number of the first temperature measuring elements 40, the second temperature measuring elements 50 and the heaters 30 is configured according to specific experimental requirements, if the specific requirements of the thermal experiment are that only heat loss compensation needs to be performed on a plurality of components of the thermal experiment device, one first temperature measuring element 40, one second temperature measuring element 50 and one heater 30 are configured for each component of the plurality of components, and preferably, one control component 20 and one power regulating component 20 control all heaters 30 to heat, and the control component 20 receives temperature measurement signals or specific temperature values corresponding to all the temperature measuring elements, so as to achieve the purpose of partition flexible heat compensation. When the invention is implemented, heat loss compensation can be carried out on any part according to experimental requirements, and the heat loss compensation range is wide.
The control assembly 10 is configured to control the heating power of the heater 30 by controlling the output signal of the power adjusting assembly 20 so that the heating zone temperature T2 follows the wall temperature T1 after comparing and analyzing the received wall temperature T1 and the heating zone temperature T2. Preferably, the control assembly 10 controls the output signal of the power adjusting assembly 20 to control the heating power of the heater 30 to make the heating zone temperature T2 reach the wall temperature T1, or make the heating zone temperature T2 within a preset fluctuation range of the wall temperature T1. That is, when the heating zone temperature T2 is equal to the wall temperature T1, the ideal adiabatic boundary condition of the wall can be achieved. Alternatively, the output signal of the control component 10 controlling the power adjusting component 20 may be an output current signal, an output voltage signal, etc. of the power adjusting component 20.
The working principle of the invention can also be as follows: after the temperature measuring element collects the corresponding temperature measuring electric signal, the temperature measuring electric signal is transmitted to the control component 10, the control component 10 converts the temperature measuring electric signal into a specific temperature value, then the control component 10 carries out comparative analysis on the wall surface temperature T1 and the heating zone temperature T2 and generates a corresponding control signal to be transmitted to the power regulating component 20 so as to control the start and stop of the power regulating component 20 and the power change, and the purposes of controlling the start and stop of the heater 30 and the heating power are achieved. The heat loss value of the thermal engineering test device as a whole or any component may be obtained according to the specific heating power of the heater 30. By adding the heater 30 such that T2 follows T1, the heat generated by the heater 30 compensates for the heat loss to complete the construction of the thermal boundary conditions.
In the embodiment, the heat loss values of the whole thermal experimental device and each component can be obtained according to experimental requirements, accurate real-time heat loss compensation can be performed on any component or pipeline and the whole thermal experimental device, the heat loss compensation range is wide, the heat loss compensation can be performed under any temperature condition, the heat loss compensation mode is flexible, the device is simple in composition, and the device can be configured in a modularized mode.
In the heat loss compensation device of the thermal experiment of some embodiments, the control assembly 10 is further configured to control the output signal of the power adjustment assembly 20 to stop heating the heater 30 when the heating zone temperature T2 exceeds the preset safety threshold. Note that the preset safety threshold in the present embodiment is not limited to 700 ℃, 750 ℃, 800 ℃, and the like.
In this embodiment, heat loss compensation can be performed under any temperature condition according to experimental requirements, the heat loss compensation mode is flexible, and the protection of the heater 30 is realized by monitoring whether the temperature T2 of the heating zone exceeds a preset safety threshold, so that the safety of the heat loss compensation device is further improved.
In the heat loss compensation device for thermal experiments of some embodiments, referring to fig. 3, the heat loss compensation device further includes a first insulation layer 70, and materials with good heat insulation performance such as silicate insulation cotton, glass cotton and the like can be used. The first insulating layer 70 is wrapped around the wall of the component or the wall of the pipe of the thermal experimental device and is interposed between the first temperature measuring element 40 and the second temperature measuring element 50. Preferably, the heater 30 is attached to the outer surface of the first heat insulation layer 70, and may be fixed to the outer surface of the first heat insulation layer 70 by means of adhesion, bundling, or the like. Specifically, the thickness of the first insulating layer 70 is selected by comprehensively considering the difference between the wall temperature T1 and the heating zone temperature T2, and preferably, the thickness is between 10mm and 20 mm.
In this embodiment, adding an insulating layer to make the heater 30 in an indirect heating mode can ensure that the heater 30 has a sufficient heating area, reduce heat loss, make heat loss compensation uniform, and prevent the service life from being affected by too high heat flux density of the heater 30.
In the heat loss compensation device for thermal experiments of some embodiments, referring to fig. 3, the heat loss compensation device further includes a second insulation layer 80, and materials with good heat insulation performance such as silicate insulation cotton, glass cotton and the like can be used. The second insulating layer 80 is wrapped around the exposed outer surface of the heater 30. Specifically, the thickness of the second insulation layer 80 may be calculated by referring to the calculation method in GB50264 "industrial equipment and pipeline insulation engineering design Specification".
In this embodiment, the second insulating layer 80 can further reduce the heat loss of the heater 30, and the heat loss is compensated uniformly, so as to facilitate the heating zone temperature T2 to reach the wall temperature T1 faster.
In the heat loss compensation device for thermal experiments of some embodiments, referring to fig. 2 and 3, the heat loss compensation device further includes a third temperature measuring element 60 connected to the control assembly 10, specifically, the third temperature measuring element 60 is attached to the outer surface of the heater 30 or disposed inside the heater 30, for obtaining the temperature T3 of the heater 30. The control assembly 10 uses the heater temperature T3 to correct the heating zone temperature T2, that is, the second temperature measuring element 50 and the third temperature measuring element 60 can correct the measurement accuracy, so as to prevent the second temperature measuring element 50 from malfunctioning or missing the measurement, which would result in inaccurate heating zone temperature T2 being obtained by the controller. Alternatively, the temperature measuring element may employ a thermocouple, a thermal resistor, or the like, depending on the wall temperature range and the change characteristics.
Alternatively, the control assembly 10 is further configured to control the output signal of the power adjustment assembly 20 to stop heating the heater 30 when the heater temperature T3 exceeds a preset safety threshold. Note that the preset safety threshold in the present embodiment is not limited to 700 ℃, 750 ℃, 800 ℃, and the like.
In this embodiment, the accuracy of thermal compensation of the heat loss compensation device can be improved, whether the temperature T3 of the heating zone exceeds the preset safety threshold is monitored to protect the heater 30, and the heat loss compensation can be performed under any temperature condition according to the experimental requirement, so that the heat loss compensation mode is flexible.
Preferably, the control assembly 10 includes a control cabinet and a controller, the controller is respectively connected to the first temperature measuring element 40, the second temperature measuring element 50 and the power regulating assembly 20, and the control cabinet provides working power for the controller. The power adjusting assembly 20 comprises a power adjusting cabinet and a power adjusting device, the power adjusting device is connected with the heater 30, and the power adjusting cabinet provides working power for the power adjusting device.
It should be noted that, the temperature measuring element in the present invention may be modularly manufactured according to the structural characteristics of the thermal compensation area, so as to facilitate the configuration, disassembly, replacement and maintenance of each component.
In another preferred embodiment, referring to fig. 4, the heat loss compensation method of the thermal experiment of the present embodiment includes the steps of:
s10, acquiring the temperature T1 of the part wall surface or the pipeline wall surface of the thermal experimental device and the temperature T2 of a heating zone formed by the heater 30. Wherein the heater 30 is disposed near the wall surface of the component or near the wall surface of the pipeline, or the heater 30 is disposed at the periphery of the wall surface of the component or the periphery of the wall surface of the pipeline, that is, the heater 30 is disposed near the wall surface, and the heating zone is the periphery of the wall surface of the component or the wall surface of the pipeline of the thermal experimental device.
S20, after the control assembly compares and analyzes the received wall temperature T1 with the heating zone temperature T2, the heating zone temperature T2 is enabled to follow the wall temperature T1 by controlling the heating power of the heater 30.
Preferably, the control assembly 10 controls the heating power of the heater 30 by controlling the output signal of the power regulating assembly 20 to make the heating zone temperature T2 reach the wall temperature T1, or make the heating zone temperature T2 within a preset fluctuation range of the wall temperature T1. That is, when the heating zone temperature T2 is equal to the wall temperature T1, a reasonable adiabatic boundary condition of the wall can be constructed. Alternatively, the output signal of the control component 10 controlling the power adjusting component 20 may be an output current signal, an output voltage signal, etc. of the power adjusting component 20.
Preferably, in this embodiment, the heaters 30 may be arranged in a partitioned manner according to specific requirements of the thermal experiment and differences of equipment, components, temperature change characteristics and the like, that is, the number of the first temperature measuring elements 40, the second temperature measuring elements 50 and the heaters 30 is configured according to specific experimental requirements, if the specific requirements of the thermal experiment are that only heat loss compensation needs to be performed on a plurality of components of the thermal experiment device, the first temperature measuring elements 40, the second temperature measuring elements 50 and the heaters 30 are configured for each component of the plurality of components, preferably, one control component 20 and one power adjusting component 20 are used for controlling heating of all the heaters 30 according to the control, and the control component 20 receives temperature measurement signals or specific temperature values corresponding to all the temperature measuring elements, so as to achieve the purpose of flexible thermal compensation in a partitioned manner. When the invention is implemented, heat loss compensation can be carried out on any part according to experimental requirements, and the heat loss compensation range is wide.
The working principle of the invention can also be as follows: after the temperature measuring element collects the corresponding temperature measuring electric signal, the temperature measuring electric signal is transmitted to the control component 10, the control component 10 converts the temperature measuring electric signal into a specific temperature value, and then the control component 10 compares and analyzes the wall surface temperature T1 and the heating area temperature T2 to generate a corresponding control signal and sends the corresponding control signal to the power regulating component 20 to control the start and stop of the power regulating component 20 and the power change, so that the purposes of controlling the start and stop of the heater 30 and the heating power are achieved. The heat loss value of the thermal engineering test device as a whole or any component may be obtained according to the specific heating power of the heater 30. By adding the heater 30 such that T2 follows T1, the heat generated by the heater 30 compensates for the heat loss to complete the construction of the thermal boundary conditions.
In the embodiment, the heat loss values of the whole thermal experimental device and each component can be obtained according to experimental requirements, accurate real-time heat loss compensation can be performed on any component or pipeline and the whole thermal experimental device, the heat loss compensation range is wide, the heat loss compensation can be performed under any temperature condition, the heat loss compensation mode is flexible, the device is simple in composition, and the device can be configured in a modularized mode.
In the heat loss compensation method of the thermal experiment of some embodiments, referring to fig. 5, further comprising the steps of:
and S30, when the heating zone temperature T2 exceeds a preset safety threshold, controlling the output signal of the power regulating assembly 20 to stop heating of the heater 30. Note that the preset safety threshold in the present embodiment is not limited to 700 ℃, 750 ℃, 800 ℃, and the like.
In this embodiment, heat loss compensation can be performed under any temperature condition according to experimental requirements, the heat loss compensation mode is flexible, and the protection of the heater 30 is realized by monitoring whether the temperature T2 of the heating zone exceeds a preset safety threshold, so that the safety of the heat loss compensation device is further improved.
In the heat loss compensation method of the thermal experiment of some embodiments, referring to fig. 6, further comprising the steps of:
s40, acquiring the temperature T3 of the heater 30, and checking the accuracy of the heating zone temperature T2 by using the heater temperature T3. That is, the heater temperature T3 and the heating zone temperature T2 can be mutually calibrated for measurement accuracy. The embodiment can further improve the accuracy of the heat loss compensation method of the thermal experimental device.
In the heat loss compensation method of the thermal experiment of some embodiments, referring to fig. 7, further comprising the steps of:
and S50, when the temperature T3 of the heater exceeds a preset safety threshold, controlling an output signal of the power regulating assembly to stop heating the heater. Note that the preset safety threshold in the present embodiment is not limited to 700 ℃, 750 ℃, 800 ℃, and the like.
In this embodiment, heat loss compensation can be performed under any temperature condition according to experimental requirements, the heat loss compensation mode is flexible, and the protection of the heater is realized by monitoring whether the temperature T3 of the heating zone exceeds a preset safety threshold, so that the safety of the heat loss compensation device is further improved.
It is to be understood that the above examples only represent preferred embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the invention; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (16)
1. The heat loss compensation device for the thermal experiment is characterized by comprising a control assembly, a power adjusting assembly, a heater, a first temperature measuring element and a second temperature measuring element;
the control component is respectively connected with the first temperature measuring element, the second temperature measuring element and the first end of the power regulating component, and the second end of the power regulating component is connected with the heater;
the first temperature measuring element is used for acquiring the temperature T1 of the component wall surface or the pipeline wall surface of the thermal experimental device;
the second temperature measuring element is used for acquiring the temperature T2 of a heating zone formed by the heater, wherein the heater is arranged near the part wall surface or near the pipeline wall surface, and the heating zone is the periphery of the part wall surface or the pipeline wall surface of the thermal experimental device;
the control component is used for controlling the heating power of the heater to enable the heating area temperature T2 to follow the wall surface temperature T1 by controlling the output signal of the power regulating component after comparing and analyzing the received wall surface temperature T1 with the heating area temperature T2.
2. The thermal test heat loss compensation apparatus of claim 1, wherein the control assembly is further configured to control the output signal of the power regulating assembly to stop heating the heater when the heating zone temperature T2 exceeds a preset safety threshold.
3. The heat loss compensation device according to claim 1, wherein the control unit controls the output signal of the power adjusting unit to control the heating power of the heater to make the heating zone temperature T2 reach the wall temperature T1, or
The heating zone temperature T2 is set within a preset fluctuation range of the wall temperature T1.
4. The thermal test heat loss compensation device of claim 1, further comprising a first insulation layer wrapped around a component wall or a pipe wall of the thermal test device and interposed between the first temperature measurement element and the second temperature measurement element.
5. The thermal test heat loss compensating apparatus of claim 4, wherein the first insulating layer has a thickness of between 10mm and 20 mm.
6. The thermal test heat loss compensation device of claim 1, further comprising a second insulation layer, wherein the second insulation layer is wrapped around the exposed outer surface of the heater.
7. The thermal test heat loss compensation apparatus of claim 1, further comprising a third temperature measurement element coupled to the control assembly for obtaining a temperature T3 of the heater; the control assembly uses the heater temperature T3 to verify the accuracy of the heating zone temperature T2.
8. The thermal test heat loss compensation apparatus of claim 7, wherein the control assembly is further configured to control the output signal of the power regulating assembly to stop heating the heater when the heater temperature T3 exceeds a preset safety threshold.
9. The thermal experimental heat loss compensation device according to claim 1, wherein the control assembly comprises a control cabinet and a controller, the controller is respectively connected with the first temperature measuring element, the second temperature measuring element and the power regulating assembly, and the control cabinet provides working power for the controller.
10. The thermal experimental heat loss compensation device according to claim 1, wherein the power regulating assembly comprises a power regulating cabinet and a power regulator, the power regulator is connected with the heater, and the power regulating cabinet provides working power for the power regulator.
11. The heat loss compensating apparatus for thermal experiments according to claim 1, wherein one of the components or the pipe is correspondingly provided with one heater, one first temperature measuring element and one second temperature measuring element; the output signal is an output current signal or an output voltage signal.
12. The heat loss compensation method for the thermal experiment is characterized by comprising the following steps of:
acquiring the temperature T1 of the part wall surface or the pipeline wall surface of the thermal experimental device and the temperature T2 of a heating zone formed by a heater; the heater is arranged near the part wall surface or near the pipeline wall surface, and the heating area is the periphery of the part wall surface or the pipeline wall surface of the thermal experimental device;
after the control component compares and analyzes the received wall surface temperature T1 with the heating zone temperature T2, the heating zone temperature T2 is enabled to follow the wall surface temperature T1 by controlling the heating power of the heater.
13. The thermal experiment heat loss compensation method of claim 12 wherein the controlling the heating zone temperature T2 to follow the wall temperature T1 by controlling the heating power of the heater comprises:
the control component controls the heating power of the heater to enable the heating zone temperature T2 to reach the wall surface temperature T1 by controlling the output signal of the power regulating component, or
The heating zone temperature T2 is within a preset fluctuation range of the wall temperature T1;
wherein the output signal is an output current signal or an output voltage signal.
14. The method of thermal experiment heat loss compensation according to claim 12, further comprising the step of:
and when the heating zone temperature T2 exceeds a preset safety threshold, controlling an output signal of the power regulating assembly to stop heating of the heater.
15. The method of thermal experiment heat loss compensation according to claim 12, further comprising the step of:
and acquiring the temperature T3 of the heater, and correcting the accuracy of the temperature T2 of the heating zone by using the temperature T3 of the heater.
16. The method of thermal experiment heat loss compensation according to claim 15, further comprising the step of:
and when the temperature T3 of the heater exceeds a preset safety threshold, controlling an output signal of the power regulating assembly to stop heating the heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310254642.3A CN116403740A (en) | 2023-03-06 | 2023-03-06 | Heat loss compensation device and method for thermal experiment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310254642.3A CN116403740A (en) | 2023-03-06 | 2023-03-06 | Heat loss compensation device and method for thermal experiment |
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| CN116403740A true CN116403740A (en) | 2023-07-07 |
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| CN202310254642.3A Pending CN116403740A (en) | 2023-03-06 | 2023-03-06 | Heat loss compensation device and method for thermal experiment |
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| Country | Link |
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| CN (1) | CN116403740A (en) |
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