Thermal power measuring system and method

Abstract

The invention discloses a thermal power measuring system and method. The thermal power measuring system comprises a liquid storage mechanism, a heating mechanism, a first pipeline, a heat storage heat exchanger, a second pipeline, a first temperature sensor and a second temperature sensor. And a preset solution is arranged in the liquid storage mechanism. The heating mechanism is arranged in the liquid storage mechanism, and the heating mechanism is used for heating a preset solution. And one end of the first pipeline is connected with a liquid outlet of the liquid storage mechanism. And a liquid inlet of the heat storage heat exchanger is connected with the other end of the first pipeline. And one end of the second pipeline is connected with a liquid outlet of the heat storage heat exchanger. The first temperature sensor is installed on the first pipeline and is close to the liquid inlet of the heat storage heat exchanger. And the second temperature sensor is mounted on the second pipeline and is close to the liquid outlet of the heat storage heat exchanger. Therefore, the thermal power measuring system solves the problems that the thermal storage capacity performance evaluation deviation of a current thermal storage device is large, and fine design and model selection requirements of engineering application are difficult to guide.

Description

Technical Field

[0001] The present invention relates to the field of heat storage technology, and in particular to a thermal power measurement system and method. Background Art

[0002] Thermal storage technology is widely used in the fields of solar thermal utilization, building HVAC energy saving, temperature control in enclosed spaces, thermal management of power electronic equipment, etc. The thermal storage heat exchanger is the core equipment of thermal storage technology. At present, the thermal storage capacity of the thermal storage heat exchanger is generally given through design calculation and evaluation, which has certain errors. In actual use, it faces a complex operating environment, and the actual thermal storage capacity often deviates greatly from the design value. In order to obtain the actual thermal storage capacity data of the thermal storage heat exchanger and guide the purchase and use of the product, systematic calibration is required. Summary of the invention

[0003] The purpose of the present invention is to provide a thermal power measurement system and method, which solves the problem that the current thermal storage capacity performance evaluation of heat storage devices has large deviations and is difficult to guide the refined design and selection requirements of engineering applications.

[0004] To achieve the above-mentioned purpose, in a first aspect, the present invention provides a thermal power measurement system, comprising: a liquid storage mechanism, a heating mechanism, a first pipeline, a heat storage heat exchanger, a second pipeline, a first temperature sensor and a second temperature sensor. The liquid storage mechanism is provided with a preset solution. The heating mechanism is built in the liquid storage mechanism, and the heating mechanism is used to heat the preset solution. One end of the first pipeline is connected to the liquid outlet of the liquid storage mechanism. The liquid inlet of the heat storage heat exchanger is connected to the other end of the first pipeline. One end of the second pipeline is connected to the liquid discharge port of the heat storage heat exchanger. The first temperature sensor is installed on the first pipeline and is close to the liquid inlet of the heat storage heat exchanger. And the second temperature sensor is installed on the second pipeline and is close to the liquid discharge port of the heat storage heat exchanger.

[0005] In one embodiment of the present invention, the preset solution is water, molten salt or oil.

[0006] In one embodiment of the present invention, the thermal power measurement system further includes a thermal insulation layer wrapped around the outer surface of the liquid storage mechanism.

[0007] In one embodiment of the present invention, the thermal power measurement system further includes a flow meter installed on the first pipeline and located between the liquid storage mechanism and the first temperature sensor.

[0008] In one embodiment of the present invention, the thermal power measurement system further includes a first electronic regulating valve installed on the first pipeline and located between the liquid storage mechanism and the flow meter.

[0009] In one embodiment of the present invention, the thermal power measurement system further includes a second electronic regulating valve installed on the second pipeline and located behind the second temperature sensor.

[0010] In one embodiment of the present invention, the thermal power measurement system further includes a control mechanism electrically connected to the heating mechanism, the first temperature sensor, the second temperature sensor, the flow meter, the first electronic regulating valve and the second electronic regulating valve respectively.

[0011] In one embodiment of the present invention, the liquid storage mechanism is located above the heat storage heat exchanger, so that the preset solution in the liquid storage mechanism can automatically flow into the heat storage heat exchanger by utilizing the height difference.

[0012] In a second aspect, the present invention provides a method for measuring thermal power. Based on the thermal power measurement system as described above, the thermal power measurement method includes: placing a preset solution in a liquid storage mechanism according to calibration requirements, closing the second electronic regulating valve, and opening the first electronic regulating valve, so that the first pipeline, the heat storage heat exchanger, and the second pipeline are filled with the preset solution. The liquid storage mechanism is placed above the heat storage heat exchanger, so that the preset solution in the liquid storage mechanism can automatically flow into the heat storage heat exchanger by utilizing the height difference. The first electronic regulating valve is closed, and the heating mechanism is controlled to heat the preset solution to the calibration temperature. The first electronic regulating valve and the second electronic regulating valve are opened, so that the heated preset solution flows through the first pipeline and the heat storage heat exchanger, and is discharged from the second pipeline. The flow rate of the flowmeter, the temperature of the first temperature sensor, and the temperature of the second temperature sensor are recorded in real time. After the test is completed, the first electronic regulating valve and the second electronic regulating valve are closed. The thermal storage power of the heat storage heat exchanger is calculated using a preset formula.

[0013] In one embodiment of the present invention, the preset formula is:

[0014] Q=mc(T1-T2)

[0015] Wherein, Q is the heat storage power of the heat storage heat exchanger, m is the flow rate of the flow meter, c is the specific heat capacity of the preset solution, T1 is the temperature measured by the first temperature sensor, and T2 is the temperature measured by the second temperature sensor.

[0016] Compared with the prior art, the thermal power measurement system and method according to the present invention have the following beneficial effects:

[0017] 1. Improved the accuracy of heat storage heat exchanger performance evaluation: The existing heat storage heat exchanger performance evaluation mainly relies on design calculations, which has certain errors. The present invention can more accurately measure the actual heat storage capacity of the heat storage heat exchanger through actual calibration tests, thereby providing users with more reliable performance data;

[0018] 2. Enhanced adaptability and reliability of the heat storage system: The heat storage heat exchanger faces a complex operating environment in actual use, and its actual heat storage capacity often deviates greatly from the design value. Through the calibration test of the present invention, the actual performance data of the heat storage heat exchanger under different working conditions can be obtained, which helps users to select a suitable heat storage heat exchanger according to actual needs, optimize its use conditions, and improve the adaptability and reliability of the system;

[0019] 3. Simplified test process and reduced cost: The present invention uses gravity to achieve the natural flow of the solution, without the need to configure complex equipment such as active drive pumps, valves, and pipe networks, which simplifies the test process and reduces the test cost; this makes the calibration test of the heat storage heat exchanger more economical and feasible, and helps promote the widespread application of heat storage technology;

[0020] 4. Improved test flexibility and versatility: The present invention can be used to test and calibrate different solution media, such as water, molten salt, oil, etc., to meet the test requirements of different heat storage systems; at the same time, by adjusting the solution temperature, the heat storage capacity test and systematic calibration under different temperature differences can be achieved, which improves the flexibility and versatility of the test;

[0021] 5. Promote the research and development and application of heat storage technology: The present invention provides an effective heat storage power measurement system and method, which provides strong support for the research and development and application of heat storage technology. Through accurate calibration testing, the performance of different heat storage heat exchangers can be evaluated, guiding the optimal design and improvement of products, and promoting the continuous advancement of heat storage technology and the expansion of its application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a thermal power measurement system in Embodiment 1 of the present invention;

[0023] Figure 2 It is a flow chart of a method for measuring thermal power in the second embodiment of the present invention.

[0024] Description of main reference numerals:

[0025] 1-liquid storage mechanism, 2-heater, 3-insulation layer, 4-first electronic regulating valve, 5-first pipeline, 6-flow meter, 7-first temperature sensor, 8-heat storage heat exchanger, 9-second temperature sensor, 10-second electronic regulating valve. DETAILED DESCRIPTION

[0026] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0027] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0028] To facilitate understanding, the main implementation concepts of the embodiments of the present invention are first briefly described.

[0029] As a key link in energy utilization and management, heat storage technology is increasingly used in many fields, especially in solar thermal utilization, building HVAC energy saving, temperature control in enclosed spaces, and thermal management of power electronic equipment. The core equipment of this technology, the heat storage heat exchanger, has a performance that is directly related to the efficiency and reliability of the entire heat storage system. However, the current evaluation of the heat storage capacity of heat storage heat exchangers mainly relies on design calculations. Although this method can provide certain theoretical guidance, due to the complexity of the actual operating environment, there is often a large deviation between the design value and the actual value.

[0030] In practical applications, the heat storage heat exchanger faces variable environmental conditions, such as fluctuations in temperature, pressure, flow and other parameters, which will affect its heat storage capacity. In addition, factors such as the properties of the heat storage material, the structure of the heat exchanger and the manufacturing process will also have a certain impact on its performance. Therefore, it is far from enough to rely solely on design calculations to evaluate the performance of the heat storage heat exchanger. Systematic calibration tests are required to obtain more accurate and reliable performance data.

[0031] However, existing calibration test methods often have some problems. On the one hand, the test equipment is complex and requires the configuration of actively driven pumps, valves, pipe networks and other systems, which not only increases the test cost, but may also lead to increased errors during the test. On the other hand, the test process is cumbersome and requires a lot of manpower and time, which is not conducive to quickly and efficiently evaluating the performance of the heat storage heat exchanger.

[0032] The inventors discovered the defects of the prior art as mentioned above, and proposed a thermal power measurement system and method. The system realizes accurate measurement of the heat storage capacity of the heat storage heat exchanger 8 through simple equipment configuration and process design. At the same time, the method also has the characteristics of high flexibility and strong versatility, and can be tested and calibrated for different solution media, meeting the testing requirements of different heat storage systems. In addition, by adjusting the solution temperature, the heat storage capacity test and systematic calibration under different temperature differences can also be realized, further improving the flexibility and versatility of the test.

[0033] In summary, the thermal power measurement system and method of the present invention is an important innovation in the field of heat storage technology. It not only improves the accuracy of the performance evaluation of the heat storage heat exchanger, but also enhances the adaptability and reliability of the heat storage system. At the same time, the method simplifies the test process, reduces costs, improves the flexibility and versatility of the test, and provides strong support for the research and development and application of heat storage technology. The successful implementation of this invention is expected to promote the continuous advancement and application expansion of heat storage technology, and make positive contributions to the efficient use of energy and sustainable development.

[0034] Embodiment 1

[0035] Figure 1 FIG. 1 is a schematic diagram of the structure of a thermal power measurement system in Embodiment 1 of the present invention. Figure 1 As shown, embodiment 1 provides a thermal power measurement system, including: a liquid storage mechanism 1, a heating mechanism, a first pipe 5, a heat storage heat exchanger 8, a second pipe, a first temperature sensor 7 and a second temperature sensor 9. The liquid storage mechanism 1 is provided with a preset solution. The heating mechanism is built in the liquid storage mechanism 1, and the heating mechanism is used to heat the preset solution. One end of the first pipe 5 is connected to the liquid outlet of the liquid storage mechanism 1. The liquid inlet of the heat storage heat exchanger 8 is connected to the other end of the first pipe 5. One end of the second pipe is connected to the liquid discharge port of the heat storage heat exchanger 8. The first temperature sensor 7 is installed on the first pipe 5 and is close to the liquid inlet of the heat storage heat exchanger 8. And the second temperature sensor 9 is installed on the second pipe and is close to the liquid discharge port of the heat storage heat exchanger 8.

[0036] Specifically, the core components of the system include a liquid storage mechanism 1, a heating mechanism, a first pipe 5, a heat storage heat exchanger 8, a second pipe, a first temperature sensor 7, and a second temperature sensor 9. The liquid storage mechanism 1 is filled with a preset solution, such as water, molten salt or oil, which serves as a medium for heat energy transfer. The heating mechanism is built into the liquid storage mechanism 1 and is responsible for heating the preset solution to the required temperature. The first pipe 5 and the second pipe are respectively connected to the liquid outlet of the liquid storage mechanism 1 and the liquid inlet of the heat storage heat exchanger 8, as well as the liquid discharge port of the heat storage heat exchanger 8, forming a passage for the flow of the solution. The first temperature sensor 7 and the second temperature sensor 9 are respectively installed on the first pipe 5 and the second pipe, which are close to the liquid inlet and the liquid discharge port of the heat storage heat exchanger 8, and are used to accurately measure the temperature change of the solution before and after flowing through the heat storage heat exchanger 8. This setting can directly reflect the ability of the heat storage heat exchanger 8 to absorb or release the heat of the solution, which is a key data for calculating thermal power. In addition, the system is also equipped with an insulation layer 3 to reduce heat loss, a flow meter 6 for monitoring the flow of the solution, and a first electronic regulating valve 4 and a second electronic regulating valve 10 for controlling the flow of the solution. All these components are electrically connected through a control mechanism, making the operation of the entire system more automated and precise. In addition, the liquid storage mechanism 1 is designed to be placed above the heat storage heat exchanger 8, and the height difference is used to allow the preset solution to flow naturally into the heat storage heat exchanger 8, which not only simplifies the system structure, but also avoids the use of additional pumping equipment, thereby reducing costs and complexity. Among them, the thermal power measurement system may also include a power supply mechanism, which is electrically connected to the heating mechanism, the control mechanism, the flow meter 6, the first temperature sensor 7, the second temperature sensor 9, the first electronic regulating valve 4 and the second electronic regulating valve 10 respectively.

[0037] Based on the above analysis, it can be seen that by accurately measuring the temperature and flow rate of the solution before and after the heat storage heat exchanger 8, combined with the preset specific heat capacity of the solution, the heat storage power of the heat storage heat exchanger 8 can be accurately calculated. This measurement method not only improves the accuracy of the performance evaluation of the heat storage heat exchanger 8, but also enhances the adaptability and reliability of the heat storage system. At the same time, it simplifies the test process, reduces costs, improves the flexibility and versatility of the test, and provides strong support for the research and development and application of heat storage technology. This innovative measurement system is expected to promote the continuous advancement and widespread application of heat storage technology, and contribute to the efficient use of energy and sustainable development.

[0038] In this embodiment, the preset solution is water, molten salt or oil.

[0039] Specifically, water, molten salt and oil, as common heat transfer media, each have unique physical and chemical properties, such as specific heat capacity, thermal conductivity and viscosity, etc., which directly affect the heat transfer efficiency and heat storage capacity of the heat storage heat exchanger 8. Therefore, selecting an appropriate preset solution is crucial for accurately measuring and evaluating the performance of the heat storage heat exchanger 8. In this embodiment, by specifying these three solutions, the flexibility and versatility of the measurement system are ensured, so that it can adapt to the testing requirements of different heat storage systems, thereby providing users with more accurate and reliable performance data.

[0040] In this embodiment, the thermal power measurement system further includes a heat preservation layer 3 wrapped on the outer surface of the liquid storage mechanism 1 .

[0041] Specifically, the thermal insulation layer 3 can effectively reduce the heat loss of the liquid storage mechanism 1 to the external environment during the heating process, ensuring that the preset solution can maintain a relatively stable temperature level. This is crucial to improving the accuracy of the entire measurement system, because any unnecessary heat loss may lead to inaccurate temperature measurement, thereby affecting the final calculation result of the thermal storage power. In addition, the use of the thermal insulation layer 3 also helps to improve the energy efficiency of the system, reduce energy waste, and make the entire measurement process more efficient and environmentally friendly. Therefore, the thermal insulation layer 3 wrapped around the outer surface of the liquid storage mechanism 1 is an indispensable part of the thermal power measurement system of the present invention, and it plays an important role in ensuring the accuracy of the measurement and improving the overall performance of the system.

[0042] In this embodiment, the thermal power measurement system further includes a flow meter 6 installed on the first pipeline 5 and located between the liquid storage mechanism 1 and the first temperature sensor 7 .

[0043] Specifically, the installation of the flowmeter 6 enables the system to monitor and record the flow data of the preset solution passing through the first pipeline 5 in real time, which is one of the key parameters necessary for calculating the heat storage power of the heat storage heat exchanger 8. By placing the flowmeter 6 after the liquid storage mechanism 1, it can be ensured that the measured flow is the flow of the solution that is about to enter the heat storage heat exchanger 8 for heat exchange after heating, thereby ensuring the accuracy and validity of the data. Placing the flowmeter 6 before the first temperature sensor 7 helps to obtain its flow information before the solution enters the heat storage heat exchanger 8, which is crucial for the subsequent temperature difference calculation and heat storage power evaluation. Such a layout allows the system to first capture the exact value of the flow rate, and then record the temperature of the solution before entering the heat exchanger through the first temperature sensor 7. The combination of the two provides a complete input data set for the subsequent power calculation. In addition, from the perspective of the overall operation of the system, the installation position of the flowmeter 6 also takes into account the convenience of operation and the maintainability of the system. Placing it on an easily accessible pipeline section facilitates regular inspection, calibration and maintenance by staff to ensure the long-term stable operation of the measurement system.

[0044] Based on the above analysis, it can be seen that the installation of flow meter 6 is not only technically reasonable and meets the demand for accurate measurement of thermal storage power, but also takes into account the convenience of actual operation and maintenance, and is an indispensable part of system design.

[0045] In this embodiment, the thermal power measurement system further includes a first electronic regulating valve 4 , which is installed on the first pipeline 5 and located between the liquid storage mechanism 1 and the flow meter 6 .

[0046] Specifically, when the first electronic regulating valve 4 performs its regulating function, it can effectively control the flow rate of the preset solution flowing out of the liquid storage mechanism 1, while ensuring that the flowmeter 6 can accurately measure the amount of solution passing through. During the test, the opening and closing states of the first electronic regulating valve 4 have a significant impact on the fluid dynamics characteristics of the entire system. When the first electronic regulating valve 4 is opened, the preset solution can flow out of the liquid storage mechanism 1, pass through the flowmeter 6, and then enter the heat storage heat exchanger 8 for heat exchange. By accurately controlling the opening of the first electronic regulating valve 4, fine adjustment of the solution flow rate can be achieved to meet the needs under different test conditions. In addition, the first electronic regulating valve 4 is electrically connected to the control mechanism of the system, so that the entire test process can be automatically controlled, further improving the accuracy and efficiency of the test. Therefore, the addition of the first electronic regulating valve 4 not only enhances the functionality and flexibility of the thermal power measurement system, but also provides strong support for obtaining more accurate and reliable performance data of the heat storage heat exchanger 8.

[0047] In this embodiment, the thermal power measurement system further includes a second electronic regulating valve 10 installed on the second pipeline and located behind the second temperature sensor 9 .

[0048] Specifically, the second electronic regulating valve 10 is installed on the second pipeline and carefully arranged behind the second temperature sensor 9. This design ensures that when the preset solution passes through the heat storage heat exchanger 8 for heat exchange, its temperature can be accurately captured and recorded by the second temperature sensor 9, and then the solution flows through the second electronic regulating valve 10. The main function of the second electronic regulating valve 10 is to adjust and control the flow of the solution flowing through the second pipeline, and to realize the switch function of the pipeline in certain test stages. It is located after the second temperature sensor 9, which means that after recording the outlet temperature, the flow state of the solution can be adjusted instantly according to the test requirements, whether it is completely closed to cut off the flow, or partially opened to adjust the flow, it can be flexibly responded. Such a design not only helps to accurately control the fluid dynamic conditions during the test process, but also can quickly isolate a part of the system when necessary for more detailed analysis or troubleshooting. In addition, since the second electronic regulating valve 10 is electrically connected to the control mechanism, remote automatic control can be achieved, which not only improves the safety and efficiency of the test, but also reduces the errors caused by human operation. In the overall test process, the second electronic control valve 10 works together with the first electronic control valve 4, the heating mechanism, the flow meter 6 and the two temperature sensors to form an efficient and accurate thermal power measurement system, providing reliable data support for the performance evaluation of the heat storage heat exchanger 8.

[0049] Based on the above analysis, it can be seen that the ingenious setting of the second electronic regulating valve 10 in the thermal power measurement system not only reflects the consideration of fine control of the test process, but is also an important part of realizing the automatic and intelligent operation of the system. It is of great significance to improve the accuracy of heat storage technology evaluation and promote the development of related technologies.

[0050] In this embodiment, the thermal power measurement system also includes a control mechanism, which is electrically connected to the heating mechanism, the first temperature sensor 7, the second temperature sensor 9, the flow meter 6, the first electronic regulating valve 4 and the second electronic regulating valve 10 respectively.

[0051] Specifically, the control mechanism is electrically connected to the heating mechanism, the first temperature sensor 7, the second temperature sensor 9, the flowmeter 6, the first electronic regulating valve 4 and the second electronic regulating valve 10, respectively, to form a highly integrated automatic control system. First, the connection between the control mechanism and the heating mechanism enables the heating process to be precisely controlled. According to the test requirements, the control mechanism can send instructions to the heating mechanism to adjust its heating power to ensure that the preset solution can be heated to the calibrated temperature. This precise temperature control is the key to obtaining accurate test results. Secondly, by connecting with the first temperature sensor 7 and the second temperature sensor 9, the control mechanism can obtain the temperature data of the inlet and outlet solutions in real time. These data are an important basis for calculating the heat storage power of the heat storage heat exchanger 8. The control mechanism can continuously monitor temperature changes to ensure the accuracy and stability of the temperature during the test. At the same time, the installation of the flowmeter 6 and the connection with the control mechanism enable the solution flow to be accurately measured. Flow is another key factor affecting the heat storage power. By real-time monitoring and recording of flow data, the accuracy of the test results can be ensured. In addition, the control mechanism is also electrically connected to the first electronic regulating valve 4 and the second electronic regulating valve 10 to achieve precise control of the flow of the solution. Before the test begins, the control mechanism can send an instruction to close the second electronic regulating valve 10 and open the first electronic regulating valve 4 to ensure that the system pipeline and the heat exchanger are filled with the solution. During the test, the control mechanism can adjust the opening of the electronic regulating valve as needed to control the flow rate and flow of the solution.

[0052] Based on the above analysis, the introduction of the control mechanism enables the thermal power measurement system to achieve high automation and precise control. By real-time monitoring and recording of key data such as temperature and flow, and precise control of the heating and solution flow process, the system can provide more accurate and reliable performance evaluation results of the heat storage heat exchanger 8. This not only improves the efficiency and accuracy of the test, but also reduces the errors and risks caused by human operation.

[0053] In this embodiment, the thermal power measurement system further includes a pressure sensor installed on the first pipeline 5, the pressure sensor is electrically connected to the control mechanism, and the pressure sensor is used to monitor the pressure change in the first pipeline 5 in real time. When the first electronic regulating valve 4 and the second electronic regulating valve 10 are opened to allow the heated preset solution to flow through the system, the control mechanism receives data from the flow meter 6 and the pressure sensor in real time, monitors the actual flow rate and pipeline pressure, and calculates the required adjustment amount according to the deviation between the actual flow rate and the target flow rate, and the deviation between the actual pressure and the target pressure. If the actual flow rate is lower than the target flow rate, the control mechanism increases the opening of the first electronic regulating valve 4 to increase the flow rate; if the actual flow rate is higher than the target flow rate, the opening of the first electronic regulating valve 4 is reduced. At the same time, if the actual pressure is lower than the target pressure, the control mechanism can appropriately reduce the opening of the second electronic regulating valve 10 to increase the pipeline pressure; if the actual pressure is higher than the target pressure, the opening of the second electronic regulating valve 10 is increased. The control mechanism adopts a closed-loop control algorithm (such as PID control) to continuously adjust the valve opening according to real-time feedback data to maintain a stable flow rate and pressure. During the entire test process, the control mechanism will continuously record key data such as flow, pressure, temperature, etc. for subsequent analysis and calculation of thermal storage power.

[0054] Specifically, the thermal power measurement system realizes real-time monitoring of the pressure change in the first pipeline 5 by introducing a pressure sensor. This innovative design significantly improves the stability and accuracy of the system. Specifically, when the test starts, the first electronic regulating valve 4 and the second electronic regulating valve 10 are opened, and the heated preset solution begins to flow through the system. At this time, the control mechanism, as the "brain" of the system, receives data from the flow meter 6 and the pressure sensor in real time, and accurately monitors the actual flow and pipeline pressure. The control mechanism is not just a simple data receiver, but an intelligent regulator that can quickly calculate and output the required adjustment amount according to the deviation between the actual flow and the target flow, and the deviation between the actual pressure and the target pressure. If the system detects that the actual flow is lower than the target flow, it means that the solution flow rate is not fast enough and may not meet the test requirements. In order to respond to this change quickly, the control mechanism will immediately increase the opening of the first electronic regulating valve 4, thereby increasing the flow of the solution and ensuring the smooth progress of the test process. On the contrary, if the actual flow is higher than the target flow, the control mechanism will reduce the opening of the first electronic regulating valve 4 to avoid excessive system pressure or energy waste caused by excessive flow. At the same time, the control mechanism's attention to pipeline pressure is also indispensable. If the actual pressure is lower than the target pressure, this may cause the solution to flow poorly or the system stability to decrease. In order to deal with this situation, the control mechanism will appropriately reduce the opening of the second electronic regulating valve 10 to increase the pressure in the pipeline to ensure that the solution can flow stably and smoothly. Conversely, if the actual pressure is higher than the target pressure, the control mechanism will increase the opening of the second electronic regulating valve 10 to release excess pressure and prevent the system from being damaged due to excessive pressure.

[0055] This adjustment process is not achieved overnight. The control mechanism adopts a closed-loop control algorithm (such as PID control), which means that it will continuously adjust the valve opening according to the real-time feedback data until the system reaches a stable flow and pressure state. This dynamic adjustment mechanism not only improves the response speed of the system, but also ensures the continuous stability of the flow and pressure during the test, providing a reliable data basis for the subsequent thermal storage power calculation. During the entire test process, the control mechanism continuously records key data such as flow, pressure, and temperature. These data are not only an important basis for evaluating the performance of the thermal storage heat exchanger 8, but also a valuable resource for subsequent optimization of system design and improvement of test accuracy. Through this innovative design, the thermal power measurement system of the present invention not only realizes the precise control of solution flow and pipeline pressure, but also significantly improves the accuracy and reliability of the test, providing strong support for the research and development and application of thermal storage technology.

[0056] For example, at a certain moment, the control mechanism finds that the actual flow rate is lower than the target flow rate, while the actual pressure is higher than the target pressure. In order to maintain the stability of the system, the control mechanism immediately calculates the required adjustment amount and automatically adjusts the opening of the first electronic regulating valve 4 and the second electronic regulating valve 10. Specifically, the control mechanism increases the opening of the first electronic regulating valve 4 to increase the flow rate, and increases the opening of the second electronic regulating valve 10 to release the excess pressure, until the actual flow rate and pressure return to the target range.

[0057] In this embodiment, the liquid storage mechanism 1 is located above the heat storage heat exchanger 8, so that the preset solution in the liquid storage mechanism 1 can automatically flow into the heat storage heat exchanger 8 by utilizing the height difference.

[0058] Specifically, this design cleverly utilizes the principle of gravity in physics, so that the preset solution in the liquid storage mechanism 1 can automatically and continuously flow into the heat storage heat exchanger 8 by relying on the gravity generated by the height difference. This design not only avoids the use of additional pumping equipment or complex driving mechanisms, thereby simplifying the overall structure of the system, reducing manufacturing costs and the complexity of operation and maintenance, but also improves the reliability and stability of the system. The gravity-driven flow mode reduces the risk of mechanical failure and energy loss, making the entire thermal power measurement process smoother and more efficient. In addition, since the natural flow of the solution is based on the height difference, the relative height of the liquid storage mechanism 1 and the heat storage heat exchanger 8 can be adjusted more flexibly to adapt to different testing requirements and scenarios, further enhancing the flexibility and applicability of the system.

[0059] In another embodiment, the liquid storage mechanism 1 may be arranged above the adjustable height bracket, and a first height sensor is installed on the liquid storage mechanism 1, and a second height sensor is installed on the heat storage heat exchanger 8, and both the first height sensor and the second height sensor are electrically connected to the control mechanism, so that the control mechanism can obtain the height information of the liquid storage mechanism 1 and the heat storage heat exchanger 8 in real time. In addition, in this embodiment, the first pipe 5 may be, for example, a flexible pipe, which can be freely bent or stretched within a certain range to adapt to the change in the height of the liquid storage mechanism 1. The control mechanism can automatically calculate and adjust the length of the first pipe 5 (or a length sensor is installed on the first pipe 5) according to the change in the height difference between the liquid storage mechanism 1 and the heat storage heat exchanger 8. This can be achieved by controlling the telescopic amount of the telescopic pipe or the degree of bending of the flexible pipe section. That is, the control mechanism can test the stability of the system and the regulation effect of the liquid flow rate and pressure under different height differences, and make necessary adjustments and optimizations to the system according to the test results. For example, the control mechanism can dynamically adjust the power of the heating mechanism, the opening of the electronic regulating valve, etc. according to the height and pipeline length information monitored in real time to ensure that the system can maintain a stable liquid flow rate and pressure at different heights and pipeline lengths. When the liquid storage mechanism 1 is raised, the length of the first pipeline 5 may increase, resulting in a decrease in the liquid flow rate. The control mechanism can compensate for this change by increasing the power of the heating mechanism or increasing the opening of the electronic regulating valve to keep the flow rate constant. By collecting and analyzing the height, pipeline length and system performance data (such as flow rate, pressure, temperature, etc.) for a long time, the control mechanism can learn and optimize the control strategy to further improve the efficiency and stability of the system. For example, the control mechanism may find that at a specific height and pipeline length combination, a specific combination of heating power and valve opening can achieve the best energy efficiency ratio.

[0060] Embodiment 2

[0061] Figure 2 FIG. 1 is a flow chart of a method for measuring thermal power in Embodiment 2 of the present invention. Figure 2 As shown, embodiment 2 provides a method for measuring thermal power. Based on the thermal power measurement system as described above, the thermal power measurement method includes:

[0062] Step S100, according to the calibration requirements, a preset solution is placed in the liquid storage mechanism, the second electronic regulating valve is closed, and the first electronic regulating valve is opened, so that the first pipeline, the heat storage heat exchanger and the second pipeline are filled with the preset solution.

[0063] Step S200, placing a liquid storage mechanism above a heat storage heat exchanger, so that the preset solution in the liquid storage mechanism can automatically flow into the heat storage heat exchanger by utilizing the height difference.

[0064] Step S300, closing the first electronic regulating valve, and controlling the heating mechanism to heat the preset solution to a calibrated temperature.

[0065] Step S400, opening the first electronic regulating valve and the second electronic regulating valve, so that the heated preset solution flows through the first pipeline and the heat storage heat exchanger, and is discharged from the second pipeline.

[0066] Step S500, recording the flow rate of the flow meter, the temperature of the first temperature sensor and the temperature of the second temperature sensor in real time.

[0067] Step S600, completing the test, closing the first electronic regulating valve and the second electronic regulating valve.

[0068] Step S700, using a preset formula, calculate the heat storage power of the heat storage heat exchanger.

[0069] In this embodiment, the preset formula is:

[0070] Q=mc(T1-T2)

[0071] Wherein, Q is the heat storage power of the heat storage heat exchanger, m is the flow rate of the flow meter, c is the specific heat capacity of the preset solution, T1 is the temperature measured by the first temperature sensor, and T2 is the temperature measured by the second temperature sensor.

[0072] The various variations and specific examples of the thermal power measurement system provided in Example 1 are also applicable to the thermal power measurement method provided in this embodiment. Through the above detailed description of a thermal power measurement system, those skilled in the art can clearly know the implementation method of a thermal power measurement method in this embodiment, so for the sake of brevity of the specification, it will not be described in detail here.

[0073] In practical applications, the thermal power measurement system of the present invention includes a liquid storage mechanism 1, a heater 2, an insulation layer 3, a first electronic control valve 4, a first pipeline 5, a flow meter 6, a first temperature sensor 7, a heat storage heat exchanger 8, a second temperature sensor 9 and a second electronic control valve 10.

[0074] According to the calibration requirements, a specific solution (such as water, molten salt, oil, etc.) is selected and stored in the liquid storage mechanism 1. The specific heat capacity of the solution is c. The second electronic regulating valve 10 is closed, and the first electronic regulating valve 4 is opened to fill the entire system pipeline and heat exchanger with the solution. The liquid storage mechanism 1 is placed in the space above the heat storage heat exchanger 8 to achieve natural flow by utilizing the height difference. Close the first electronic regulating valve 4 and use the heater 2 to heat the solution to the calibration temperature. Open the first electronic regulating valve 4 and the second electronic regulating valve 10 to allow the high-temperature solution to flow through the system pipeline, heat exchanger, etc., and finally discharge through the second electronic regulating valve 10. Record the flow rate m of the flowmeter 6, the inlet temperature sensor temperature T1 (the temperature T1 measured by the first temperature sensor 7) and the outlet temperature sensor temperature T2 (the temperature T2 measured by the second temperature sensor 9) in real time. After the test is completed, close the first electronic regulating valve 4 and the second electronic regulating valve 10. The heat storage power Q of the heat storage heat exchanger 8 is calculated by the following formula: Q=mc(T1-T2); wherein Q is the heat storage power of the heat storage heat exchanger 8, m is the flow rate of the flowmeter 6, c is the specific heat capacity of the preset solution, T1 is the temperature measured by the first temperature sensor 7, and T2 is the temperature measured by the second temperature sensor 9.

[0075] In summary, the thermal power measurement system and method of the present invention have the following beneficial effects:

[0076] 1. Improved the accuracy of the performance evaluation of the heat storage heat exchanger: The existing performance evaluation of the heat storage heat exchanger 8 mainly relies on design calculations, which has certain errors. The present invention can more accurately measure the actual heat storage capacity of the heat storage heat exchanger through actual calibration tests, thereby providing users with more reliable performance data;

[0077] 2. Enhanced adaptability and reliability of the heat storage system: The heat storage heat exchanger faces a complex operating environment in actual use, and its actual heat storage capacity often deviates greatly from the design value. Through the calibration test of the present invention, the actual performance data of the heat storage heat exchanger under different working conditions can be obtained, which helps users to select a suitable heat storage heat exchanger according to actual needs, optimize its use conditions, and improve the adaptability and reliability of the system;

[0078] 3. Simplified test process and reduced cost: The present invention uses gravity to achieve the natural flow of the solution, without the need to configure complex equipment such as active drive pumps, valves, and pipe networks, which simplifies the test process and reduces the test cost; this makes the calibration test of the heat storage heat exchanger more economical and feasible, and helps promote the widespread application of heat storage technology;

[0079] 4. Improved test flexibility and versatility: The present invention can be used to test and calibrate different solution media, such as water, molten salt, oil, etc., to meet the test requirements of different heat storage systems; at the same time, by adjusting the solution temperature, the heat storage capacity test and systematic calibration under different temperature differences can be achieved, which improves the flexibility and versatility of the test;

[0080] 5. Promote the research and development and application of heat storage technology: The present invention provides an effective heat storage power measurement system and method, which provides strong support for the research and development and application of heat storage technology. Through accurate calibration testing, the performance of different heat storage heat exchangers can be evaluated, guiding the optimal design and improvement of products, and promoting the continuous advancement of heat storage technology and the expansion of its application.

[0081] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. A thermal power measurement system, characterized in that: include: A liquid storage mechanism with a preset solution built in; A heating mechanism, which is built into the liquid storage mechanism and is used to heat the preset solution; a first pipe, one end of which is connected to the liquid outlet of the liquid storage mechanism; a heat storage heat exchanger, wherein the liquid inlet of the heat storage heat exchanger is connected to the other end of the first pipeline; a second pipe, one end of which is connected to the liquid discharge port of the heat storage heat exchanger; A first temperature sensor is installed on the first pipe and close to the liquid inlet of the heat storage heat exchanger; as well as The second temperature sensor is installed on the second pipe and is close to the drain port of the heat storage heat exchanger.

2. The thermal power measurement system according to claim 1, characterized in that: The preset solution is water, molten salt or oil.

3. The thermal power measurement system according to claim 1, characterized in that: It also includes a heat-insulating layer wrapped on the outer surface of the liquid storage mechanism.

4. The thermal power measurement system according to claim 1, characterized in that: It also includes a flow meter installed on the first pipeline and located between the liquid storage mechanism and the first temperature sensor.

5. The thermal power measurement system according to claim 4, characterized in that: It also includes a first electronic regulating valve, which is installed on the first pipeline and located between the liquid storage mechanism and the flow meter.

6. The thermal power measurement system according to claim 5, characterized in that: The system also includes a second electronic regulating valve which is installed on the second pipe and located behind the second temperature sensor.

7. The thermal power measurement system according to claim 6, characterized in that: It also includes a control mechanism, which is electrically connected to the heating mechanism, the first temperature sensor, the second temperature sensor, the flow meter, the first electronic regulating valve and the second electronic regulating valve respectively.

8. The thermal power measurement system according to claim 1, characterized in that: The liquid storage mechanism is located above the heat storage heat exchanger, so that the preset solution in the liquid storage mechanism can automatically flow into the heat storage heat exchanger by utilizing the height difference.

9. A method for measuring thermal power, based on the thermal power measurement system according to any one of claims 1 to 8, characterized in that: The thermal power measurement method includes: According to the calibration requirements, a preset solution is placed in the liquid storage mechanism, the second electronic regulating valve is closed, and the first electronic regulating valve is opened, so that the first pipeline, the heat storage heat exchanger and the second pipeline are filled with the preset solution; Placing a liquid storage mechanism above the heat storage heat exchanger, so that the preset solution in the liquid storage mechanism can automatically flow into the heat storage heat exchanger by utilizing the height difference; Closing the first electronic regulating valve, and controlling the heating mechanism to heat the preset solution to a calibration temperature; Opening the first electronic regulating valve and the second electronic regulating valve, so that the heated preset solution flows through the first pipeline and the heat storage heat exchanger, and is discharged from the second pipeline; Record the flow rate of the flow meter, the temperature of the first temperature sensor and the temperature of the second temperature sensor in real time; After the test is completed, the first electronic regulating valve and the second electronic regulating valve are closed; The heat storage power of the heat storage heat exchanger is calculated using the preset formula.

10. The method for measuring thermal power according to claim 9, characterized in that: The preset formula is: Q=mc(T1-T2) Wherein, Q is the heat storage power of the heat storage heat exchanger, m is the flow rate of the flow meter, c is the specific heat capacity of the preset solution, T1 is the temperature measured by the first temperature sensor, and T2 is the temperature measured by the second temperature sensor.

Images