Heat storage capacity measuring device and method for heat mass energy storage system based on adiabatic heat

Abstract

The invention discloses a heat storage capacity measuring device and method for a heat mass energy storage system based on adiabatic heat. Comprising a high-heat-insulation heat exchanger, a first thermal parameter measuring group, a second thermal parameter measuring group, a third thermal parameter measuring group, a fourth thermal parameter measuring group, a first online metering device group, a second online metering device group, a cooling tower, a fluid circulating pump, a signal acquisition module and an operation parameter adjusting module. According to the method, the heat storage medium of the heat mass energy storage system exchanges heat with the stable calorimetric medium with the known physical property through the heat exchanger with the high heat insulation performance, and the heat stored by the heat storage medium of the heat mass energy storage system can be obtained by combining the enthalpy rise of the fluid with the known physical property and the calibration of the heat leakage amount of the heat exchanger.

Description

Technical Field

[0001] The present invention relates to the field of energy and measurement, and in particular to a device and method for measuring heat storage of a thermal mass energy storage system based on adiabatic calorimetry. Background Art

[0002] Thermal storage technology has developed rapidly in China in recent years. In terms of the energy transfer and conversion laws of key thermal processes in energy storage, parameter optimization design of thermal mass energy storage systems in multiple scenarios, research and development of core components of thermal mass energy storage systems, optimization of operating conditions, and research and integration of thermal storage technologies in multiple application scenarios, China has accumulated a wealth of research results and demonstration experience.

[0003] However, the development of heat storage technology is still facing many challenges. Among them, the improvement of the method of measuring the energy efficiency of thermal mass energy storage systems is one of the technical bottlenecks that needs to be broken through. Important energy efficiency indicators of existing heat storage systems, such as the heat storage capacity of the system, are mainly measured by thermal parameter instruments (such as temperature, pressure and flow meters) installed in the heat storage system itself, combined with the specific heat and other thermal properties of the heat storage medium. The instrument accuracy level and measurement methods of different heat storage systems are significantly different, and the traceability of the values ​​of related parameters is difficult to ensure, resulting in poor mutual recognition of existing measurement results. For some heat storage media with poor thermal properties in the high temperature range, even the accurate assessment of their heat storage capacity is an important problem. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention aims to provide a device and method for measuring heat storage of a thermal mass energy storage system based on adiabatic calorimetry.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A heat storage measuring device for a thermal mass energy storage system based on adiabatic calorimetry, comprising a highly adiabatic heat exchanger, a first thermal parameter measurement group, a second thermal parameter measurement group, a third thermal parameter measurement group, a fourth thermal parameter measurement group, a first online metering device group, a second online metering device group, a cooling tower, a fluid circulation pump, a signal acquisition module and an operation parameter adjustment module;

[0007] The heat storage medium inlet of the thermal mass energy storage system, the heat storage medium outlet of the thermal mass energy storage system, the calorimetric medium inlet and the calorimetric medium outlet of the high adiabatic heat exchanger are respectively connected with the heat storage medium input pipeline of the thermal mass energy storage system, the heat storage medium output pipeline of the thermal mass energy storage system, the calorimetric medium input pipeline and the calorimetric medium output pipeline; the first thermal parameter measurement group, the second thermal parameter measurement group, the third thermal parameter measurement group and the fourth thermal parameter measurement group are respectively connected to the calorimetric medium output pipeline, the calorimetric medium input pipeline, the heat storage medium input pipeline of the thermal mass energy storage system and the heat storage medium output pipeline of the thermal mass energy storage system; the calorimetric medium output pipeline and the calorimetric medium input pipeline are respectively connected to the inlet and outlet of the cooling tower, and the fluid circulation pump is arranged on the calorimetric medium input pipeline;

[0008] The signal acquisition module is respectively connected to the first thermal parameter measurement group, the second thermal parameter measurement group, the third thermal parameter measurement group and the fourth thermal parameter measurement group, and is connected to the host computer and the operation parameter adjustment module, and is used to collect signals from the first thermal parameter measurement group, the second thermal parameter measurement group, the third thermal parameter measurement group and the fourth thermal parameter measurement group and transmit them to the host computer and the operation parameter adjustment module;

[0009] A first stop valve, a second stop valve, a third stop valve and a fourth stop valve are respectively connected in series in front of the inlets of the first thermal parameter measurement group, the second thermal parameter measurement group, the third thermal parameter measurement group and the fourth thermal parameter measurement group; a first regulating valve and a second regulating valve are respectively provided in the calorimetric medium output pipeline and the calorimetric medium input pipeline, and the first stop valve, the second stop valve, the third stop valve, the fourth stop valve, the first regulating valve and the second regulating valve are all connected to the operation parameter adjustment module.

[0010] Furthermore, the calorimetric medium output pipeline and the calorimetric medium input pipeline are respectively connected to the first online metering device group and the second online metering device group, the first online metering device group and the second online metering device group are respectively connected in parallel with the first thermal parameter measurement group and the second thermal parameter measurement group, the first online metering device group and the second online metering device group are both connected to the signal acquisition module, the signal acquisition module collects signals from the first online metering device group and the second online metering device group and transmits them to the host computer and the operating parameter adjustment module; the fifth stop valve and the sixth stop valve are respectively connected in series in front of the inlets of the first online metering device group and the second online metering device group, and the fifth stop valve and the sixth stop valve are both connected to the operating parameter adjustment module.

[0011] Furthermore, the heat storage amount measuring device of the thermal mass energy storage system also includes a calorimetric medium storage tank, and the inlet and outlet of the calorimetric medium storage tank are respectively connected to the cooling tower outlet and the calorimetric medium input pipeline.

[0012] Furthermore, the high-insulation heat exchanger is a plate heat exchanger or a tube heat exchanger, and its outer surface is covered with a low thermal conductivity insulation material; the high-insulation heat exchanger is equipped with an emergency emptying bypass; a plurality of temperature measurement points are evenly distributed between the outer surface of the high-insulation heat exchanger and the insulation material, and each temperature measurement point is connected to the signal acquisition module.

[0013] Furthermore, the heat leakage rate of the highly adiabatic heat exchanger in the working state is not higher than 5% of the heat exchange amount between the cold and hot fluids.

[0014] Furthermore, the first thermal parameter measurement group, the second thermal parameter measurement group, the third thermal parameter measurement group and the fourth thermal parameter measurement group all include a working thermometer, a working flow meter and a working pressure gauge; the first online metering device group and the second online metering device group all include a standard thermometer, a standard flow meter and a standard pressure gauge.

[0015] Furthermore, the lining of the calorimetric medium storage tank is stainless steel, and high-temperature resistant insulation material is directly filled between the lining and the outer surface; 1-3 temperature measuring points are configured in the calorimetric medium storage tank, and all temperature measuring points are connected to the signal acquisition module.

[0016] The present invention also provides a working method of the above-mentioned heat storage capacity measuring device of the thermal mass energy storage system, and the specific process is as follows:

[0017] S1, open the first stop valve and the second stop valve, start the fluid circulation pump, and drive the calorimetric medium to circulate;

[0018] S2, opening the third stop valve and the fourth stop valve, so that the heat storage medium of the thermal mass energy storage system flows through the high adiabatic heat exchanger and exchanges heat with the calorimetric medium on the low temperature side;

[0019] S3, the first thermal parameter measurement group, the second thermal parameter measurement group, the third thermal parameter measurement group and the fourth thermal parameter measurement group respectively measure the thermal parameters of the heat storage medium input of the thermal mass energy storage system, the heat storage medium output of the thermal mass energy storage system, the calorimetric medium input and the calorimetric medium output, and the signal acquisition module collects the measurement signal and transmits it to the operation parameter adjustment module, and the operation parameter adjustment module adjusts the opening of the first regulating valve and the second regulating valve and the cooling rate of the cooling tower accordingly, so that the thermal parameters such as the input and output temperature of the heat storage medium of the thermal mass energy storage system are consistent with its operating conditions;

[0020] S4, maintaining stable operation until all the heat of the heat storage medium in the thermal mass energy storage system is transferred to the calorimetric medium through the highly adiabatic heat exchanger;

[0021] S5. The heat absorbed by the calorimetric medium can be obtained according to the temperature, pressure and flow rate of the calorimetric medium input and output recorded in real time by the first thermal parameter measurement group and the second thermal parameter measurement group during operation, combined with the specific heat and density and other physical properties of the calorimetric medium, and according to the integral enthalpy value increment of the calorimetric medium during the operation period;

[0022] S6. According to the measurement results of the temperature measurement points arranged on the high-insulation heat exchanger, combined with the pre-calibrated heat leakage rate of the high-insulation heat exchanger, the heat leakage amount of the high-insulation heat exchanger to the outside during the heat exchange process is obtained; according to the input and output temperatures of the calorimetric medium, combined with the thermal conductivity of the calorimetric medium and the ambient temperature, as well as the thermal conductivity of the pipe body of the pipe between the high-insulation heat exchanger and the first thermal parameter measurement group and the thermal conductivity of the insulation material wrapped on the pipe body, the weak heat leakage amount of the pipe between the high-insulation heat exchanger and the first thermal parameter measurement group is obtained; the sum of the weak heat leakage amount of the pipe is obtained by summing up the heat leakage amount of the high-insulation heat exchanger to the outside during the heat exchange process and the weak heat leakage amount of the pipe between the high-insulation heat exchanger and the first thermal parameter measurement group;

[0023] S7, adding the heat absorbed by the calorimetric medium calculated in step S5 and the sum of the weak heat leakage of the pipe calculated in step S6 to obtain the heat storage capacity of the thermal mass energy storage system to be tested including the heat leakage.

[0024] Furthermore, during operation, switching between the first stop valve and the fifth stop valve and switching between the second stop valve and the sixth stop valve are implemented to switch between the first thermal parameter measurement group and the first online metering device group and to switch between the second thermal parameter measurement group and the second online metering device group. The thermal parameters measured by the first online metering device group and the second online metering device group are compared with the temperature, pressure and flow values ​​measured by the first thermal parameter measurement group and the second thermal parameter measurement group, respectively, and the measuring instruments of the first thermal parameter measurement group and the second thermal parameter measurement group are calibrated in time to ensure the accuracy and reliability of the measurement.

[0025] Furthermore, if an emergency situation of pipe blockage occurs, the emergency drain bypass of the high-insulation heat exchanger is opened to avoid excessive pressure inside the system.

[0026] The beneficial effect of the present invention is that the present invention uses a specially designed high insulation performance heat exchanger to exchange heat between the heat storage medium of the thermal mass energy storage system (such as heat transfer oil, etc.) and a calorimetric medium with known and stable properties (such as liquid water, supercritical CO2). Combined with the enthalpy rise of the calorimetric medium with known properties and the calibration of the heat leakage of the heat exchanger, the heat stored in the heat storage medium of the thermal mass energy storage system can be obtained, thereby improving the standardized evaluation capability of thermal mass energy storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1Schematic diagram of the structure of a heat storage measuring device for a thermal mass energy storage system in an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings. It should be noted that this embodiment is based on the technical solution and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to this embodiment.

[0029] Example 1

[0030] This embodiment provides a heat storage measurement device for a thermal mass energy storage system based on adiabatic calorimetry. Figure 1 As shown, it includes a high adiabatic heat exchanger 1, a first thermal parameter measurement group 2, a second thermal parameter measurement group 3, a third thermal parameter measurement group 4, a fourth thermal parameter measurement group 5, a first online metering device group 6, a second online metering device group 7, a cooling tower 8, a fluid circulation pump 10, a signal acquisition module 11 and an operation parameter adjustment module 12;

[0031] The highly adiabatic heat exchanger 1 comprises a heat storage medium inlet of a thermal mass energy storage system, a heat storage medium outlet of the thermal mass energy storage system, a calorimetric medium inlet and a calorimetric medium outlet, wherein the heat storage medium inlet of the thermal mass energy storage system is connected to a heat storage medium input pipeline of the thermal mass energy storage system, the heat storage medium outlet of the thermal mass energy storage system is connected to a heat storage medium output pipeline of the thermal mass energy storage system, the calorimetric medium inlet is connected to a calorimetric medium input pipeline, and the calorimetric medium outlet is connected to a calorimetric medium output pipeline.

[0032] The first thermal parameter measurement group 2 is connected to the calorimetric medium output pipeline, the second thermal parameter measurement group 3 is connected to the calorimetric medium input pipeline, the third thermal parameter measurement group 4 is connected to the thermal mass energy storage system thermal storage medium input pipeline, and the fourth thermal parameter measurement group 5 is connected to the thermal mass energy storage system thermal storage medium output pipeline; the calorimetric medium output pipeline and the calorimetric medium input pipeline are respectively connected to the inlet and outlet of the cooling tower, and the fluid circulation pump 10 is arranged on the calorimetric medium input pipeline;

[0033] The signal acquisition module 11 is respectively connected to the first thermal parameter measurement group 2, the second thermal parameter measurement group 3, the third thermal parameter measurement group 4 and the fourth thermal parameter measurement group 5, and is connected to the host computer and the operating parameter adjustment module 12, and is used to collect signals from the first thermal parameter measurement group 2, the second thermal parameter measurement group 3, the third thermal parameter measurement group 4 and the fourth thermal parameter measurement group 5 and transmit them to the host computer and the operating parameter adjustment module 12;

[0034] A first stop valve 13 is connected in series before the inlet of the first thermal parameter measurement group 2, a second stop valve 14 is connected in series before the inlet of the second thermal parameter measurement group 3, a third stop valve 15 is connected in series before the inlet of the third thermal parameter measurement group 4, and a fourth stop valve 16 is connected in series before the inlet of the fourth thermal parameter measurement group 5; a first regulating valve 19 is provided on the calorimetric medium output pipeline, and a second regulating valve 20 is provided on the calorimetric medium input pipeline. The first stop valve 13, the second stop valve 14, the third stop valve 15, the fourth stop valve 16, the first regulating valve 19 and the second regulating valve 20 are all connected to the operation parameter adjustment module 12.

[0035] In this embodiment, the calorimetric medium output pipeline is connected to the first online metering device group 6, and the calorimetric medium input pipeline is connected to the second online metering device group 7. The first online metering device group 6 is connected in parallel with the first thermal parameter measurement group 2, and the second online metering device group 7 is connected in parallel with the second thermal parameter measurement group 3. The first online metering device group 6 and the second online metering device group 7 are both connected to the signal acquisition module 11, and the signal acquisition module 11 collects signals from the first online metering device group 6 and the second online metering device group 7 and transmits them to the host computer and the operating parameter adjustment module 12; a fifth stop valve 17 is connected in series before the inlet of the first online metering device group 6, and a sixth stop valve 18 is connected in series before the inlet of the second online metering device group 7, and the fifth stop valve 17 and the sixth stop valve 18 are both connected to the operating parameter adjustment module 12.

[0036] Furthermore, in this embodiment, the heat storage measuring device of the thermal mass energy storage system further comprises a calorimetric medium storage tank 9, the inlet and outlet of which are respectively connected to the cooling tower outlet and the calorimetric medium input pipeline. The calorimetric medium flowing out of the cooling tower can be temporarily stored in the calorimetric medium storage tank 9, and then input into the high adiabatic heat exchanger 1 through the fluid circulation pump 10.

[0037] In this embodiment, the highly insulated heat exchanger 1 may be a plate heat exchanger or a tubular heat exchanger, with an operating temperature range of room temperature to 700°C and an operating pressure range of normal pressure-10MPa. The outer surface of the highly insulated heat exchanger 1 is coated with a low thermal conductivity insulation material. The highly insulated heat exchanger 1 is provided with an emergency drain bypass, which can quickly drain the heat storage medium in the highly insulated heat exchanger 1 when the pressure of the heat storage medium of the heat-mass energy storage system increases rapidly due to an emergency. In addition, a plurality of temperature measurement points are evenly distributed between the outer surface of the highly insulated heat exchanger 1 and the insulation material, which are used to evaluate the temperature field inside the highly insulated heat exchanger 1, and each temperature measurement point is connected to the signal acquisition module 11. The heat leakage rate of the highly insulated heat exchanger 1 in the working state is not higher than 5% of the heat exchange between the cold and hot fluids.

[0038] In this embodiment, the first thermal parameter measurement group 2, the second thermal parameter measurement group 3, the third thermal parameter measurement group 4 and the fourth thermal parameter measurement group 5 all include a working thermometer, a working flow meter and a working pressure gauge. The working thermometer can be a platinum resistance thermometer or a thermocouple, etc.; the working flow meter can be an orifice flowmeter, an electromagnetic flowmeter or a vortex flowmeter, etc.; the working pressure gauge can be an elastic pressure gauge or an electronic pressure gauge, etc.

[0039] In this embodiment, the first online metering device group 6 and the second online metering device group 7 both include a standard thermometer, a standard flowmeter and a standard pressure gauge, wherein the standard thermometer, the standard flowmeter and the standard pressure gauge can be selected from first-class standard or second-class standard according to actual needs.

[0040] In this embodiment, the cooling tower 8 has a high specific surface area design and is equipped with an electric fan to dissipate high heat loads. The fluid heat exchange channels inside are made of stainless steel, and the outer surface of the heat exchange surface is coated with anti-corrosion paint.

[0041] In this embodiment, the inner lining of the calorimetric medium storage tank 9 is stainless steel, and the space between the inner lining and the outer surface is directly filled with a high temperature resistant insulating material. According to specific requirements, the volume of the calorimetric medium storage tank 9 can be selected to be 0.5-5m 3 In addition, the calorimetric medium storage tank 9 needs to be equipped with 1-3 temperature measuring points, and all temperature measuring points are connected to the signal acquisition module 11.

[0042] In this embodiment, the basic thermal properties of the calorimetric medium, such as specific heat and thermal conductivity, are known, and the calorimetric medium may be water or supercritical carbon dioxide, or other calorimetric fluids with known thermal properties.

[0043] Example 2

[0044] This embodiment provides a working method of the heat storage measuring device of the thermal mass energy storage system described in Embodiment 1, and the specific process is as follows:

[0045] S1, open the first stop valve 13 and the second stop valve 14, start the fluid circulation pump 10, and drive the calorimetric medium to circulate;

[0046] S2, opening the third stop valve 15 and the fourth stop valve 16, so that the heat storage medium (such as heat transfer oil or water vapor) of the thermal mass energy storage system flows through the high insulation heat exchanger 1 and exchanges heat with the calorimetric medium on the low temperature side;

[0047] S3, the first thermal parameter measurement group 2, the second thermal parameter measurement group 3, the third thermal parameter measurement group 4 and the fourth thermal parameter measurement group 5 respectively measure the thermal parameters (including temperature, flow rate and pressure) of the heat storage medium input of the thermal mass energy storage system, the heat storage medium output of the thermal mass energy storage system, the calorimetric medium input and the calorimetric medium output. After the signal acquisition module acquires the measurement signal, it transmits it to the operation parameter adjustment module, and the operation parameter adjustment module adjusts the opening of the first regulating valve 19 and the second regulating valve 20 and the cooling rate of the cooling tower accordingly, so that the thermal parameters such as the input and output temperature of the heat storage medium of the thermal mass energy storage system are consistent with its operating conditions;

[0048] S4, maintaining stable operation until all the heat of the heat storage medium in the thermal energy storage system is transferred to the calorimetric medium through the highly adiabatic heat exchanger 1;

[0049] S5. Based on the temperature, pressure and flow rate of the calorimetric medium input and output recorded in real time by the first thermal parameter measurement group 2 and the second thermal parameter measurement group 3 during operation, combined with the specific heat and density and other physical properties of the calorimetric medium, the heat absorbed by the calorimetric medium can be obtained according to the integral enthalpy value increment of the calorimetric medium during the operation period. The specific calculation formula is as follows:

[0050]

[0051] In the formula, Q 量热介质 represents the heat absorbed by the calorimetric medium during the measurement process, Δh represents the specific enthalpy of the calorimetric medium, t1 represents the start time of the measurement, t2 represents the end time of the measurement, and c represents the calorimetric medium.

[0052] Specific heat of medium at constant pressure (for pure substances, the specific value can be obtained from pressure and temperature), represents the mass flow rate of the calorimetric medium (obtained by multiplying the volume flow rate by the density, or directly obtained by a mass flow meter), T 出 Represents the output temperature of the calorimetric medium, T 入 Represents the input temperature of the calorimetric medium.

[0053] S6. According to the measurement results of the temperature measurement points arranged on the highly adiabatic heat exchanger 1, combined with the previously calibrated heat leakage rate of the highly adiabatic heat exchanger 1, the heat leakage of the highly adiabatic heat exchanger 1 to the outside during the heat exchange process can be obtained. According to the input and output temperatures of the calorimetric medium, combined with the physical parameters such as the thermal conductivity of the calorimetric medium, the thermal conductivity of the pipe body of the pipeline between the highly adiabatic heat exchanger 1 and the first thermal parameter measurement group 2 and the thermal conductivity of the insulation material wrapped on the pipe body, plus the ambient temperature, the weak heat leakage of the pipe between the highly adiabatic heat exchanger 1 and the first thermal parameter measurement group 2 is obtained (the reliability of the heat leakage calculation can be improved by combining analytical formulas with numerical heat transfer simulation). The sum of the heat leakage during the heat storage measurement process is obtained by summing up the heat leakage of the highly adiabatic heat exchanger 1 to the outside during the heat exchange process and the weak heat leakage of the pipe between the highly adiabatic heat exchanger 1 and the first thermal parameter measurement group 2.

[0054] S7, adding the heat absorbed by the calorimetric medium calculated in step S5 and the sum of the weak heat leakage of the pipe calculated in step S6 to obtain the heat storage capacity of the thermal mass energy storage system to be tested.

[0055] Q 储热介质 =Q 量热介质 +Q 换热器漏热 +Q 管路漏热 (2)

[0056] In the formula, Q 储热介质 Represents the heat storage capacity of the thermal mass energy storage system to be tested, Q 量热介质 Indicates the amount of heat absorbed by the calorimetric medium, Q 换热器漏热 represents the heat leakage of the high adiabatic heat exchanger 1 to the outside during the heat exchange process, Q 管路漏热 Represents the slight heat leakage in the tube between the highly adiabatic heat exchanger 1 and the first thermal parameter measurement group 2.

[0057] Furthermore, during operation, the switching between the first stop valve 13 and the fifth stop valve 17 and the switching between the second stop valve 14 and the sixth stop valve 18 realizes the switching between the first thermal parameter measurement group 2 and the first online metering device group 6 and the switching between the second thermal parameter measurement group 3 and the second online metering device group 7. The thermal parameters measured by the first online metering device group 6 and the second online metering device group 7 are compared with the temperature, pressure and flow values ​​measured in the first thermal parameter measurement group 2 and the second thermal parameter measurement group 3, respectively, and the measuring instruments of the first thermal parameter measurement group 2 and the second thermal parameter measurement group 3 are calibrated in time to ensure the accuracy and reliability of the measurement.

[0058] Furthermore, if an emergency situation such as pipe blockage occurs, the emergency drain bypass of the high-insulation heat exchanger can be quickly opened to avoid excessive pressure inside the system.

[0059] For those skilled in the art, various corresponding changes and modifications can be made according to the above technical solutions and concepts, and all of these changes and modifications should be included in the protection scope of the claims of the present invention.

Claims

1. A heat storage measurement device for a thermal mass energy storage system based on adiabatic calorimetry, characterized in that: It includes a high-insulation heat exchanger, a first thermal parameter measurement group, a second thermal parameter measurement group, a third thermal parameter measurement group, a fourth thermal parameter measurement group, a first online metering device group, a second online metering device group, a cooling tower, a fluid circulation pump, a signal acquisition module and an operation parameter adjustment module; The heat storage medium inlet of the thermal mass energy storage system, the heat storage medium outlet of the thermal mass energy storage system, the calorimetric medium inlet and the calorimetric medium outlet of the high adiabatic heat exchanger are respectively connected with the heat storage medium input pipeline of the thermal mass energy storage system, the heat storage medium output pipeline of the thermal mass energy storage system, the calorimetric medium input pipeline and the calorimetric medium output pipeline; the first thermal parameter measurement group, the second thermal parameter measurement group, the third thermal parameter measurement group and the fourth thermal parameter measurement group are respectively connected to the calorimetric medium output pipeline, the calorimetric medium input pipeline, the heat storage medium input pipeline of the thermal mass energy storage system and the heat storage medium output pipeline of the thermal mass energy storage system; the calorimetric medium output pipeline and the calorimetric medium input pipeline are respectively connected to the inlet and outlet of the cooling tower, and the fluid circulation pump is arranged on the calorimetric medium input pipeline; The signal acquisition module is respectively connected to the first thermal parameter measurement group, the second thermal parameter measurement group, the third thermal parameter measurement group and the fourth thermal parameter measurement group, and is connected to the host computer and the operation parameter adjustment module, and is used to collect signals from the first thermal parameter measurement group, the second thermal parameter measurement group, the third thermal parameter measurement group and the fourth thermal parameter measurement group and transmit them to the host computer and the operation parameter adjustment module; A first stop valve, a second stop valve, a third stop valve and a fourth stop valve are respectively connected in series in front of the inlets of the first thermal parameter measurement group, the second thermal parameter measurement group, the third thermal parameter measurement group and the fourth thermal parameter measurement group; a first regulating valve and a second regulating valve are respectively provided in the calorimetric medium output pipeline and the calorimetric medium input pipeline, and the first stop valve, the second stop valve, the third stop valve, the fourth stop valve, the first regulating valve and the second regulating valve are all connected to the operation parameter adjustment module.

2. The heat storage capacity measuring device of the thermal mass energy storage system according to claim 1 is characterized in that: The calorimetric medium output pipeline and the calorimetric medium input pipeline are respectively connected to the first online metering device group and the second online metering device group, the first online metering device group and the second online metering device group are respectively connected in parallel with the first thermal parameter measurement group and the second thermal parameter measurement group, the first online metering device group and the second online metering device group are both connected to the signal acquisition module, the signal acquisition module collects signals from the first online metering device group and the second online metering device group and transmits them to the host computer and the operating parameter adjustment module; the fifth stop valve and the sixth stop valve are respectively connected in series in front of the inlets of the first online metering device group and the second online metering device group, and the fifth stop valve and the sixth stop valve are both connected to the operating parameter adjustment module.

3. The heat storage capacity measuring device of the thermal mass energy storage system according to claim 1, characterized in that: The heat storage measuring device of the thermal mass energy storage system also includes a calorimetric medium storage tank, and the inlet and outlet of the calorimetric medium storage tank are respectively connected to the cooling tower outlet and the calorimetric medium input pipeline.

4. The heat storage capacity measuring device of the thermal mass energy storage system according to claim 1, characterized in that: The high-insulation heat exchanger is a plate heat exchanger or a tube heat exchanger, and its outer surface is covered with a low thermal conductivity insulation material; the high-insulation heat exchanger is equipped with an emergency emptying bypass; a plurality of temperature measurement points are evenly distributed between the outer surface of the high-insulation heat exchanger and the insulation material, and each temperature measurement point is connected to a signal acquisition module.

5. The heat storage capacity measuring device of the thermal mass energy storage system according to claim 4, characterized in that: The heat leakage rate of the highly adiabatic heat exchanger in the working state is not higher than 5% of the heat exchange between the cold and hot fluids.

6. The heat storage capacity measuring device of the thermal mass energy storage system according to claim 2, characterized in that: The first thermal parameter measurement group, the second thermal parameter measurement group, the third thermal parameter measurement group and the fourth thermal parameter measurement group all include a working thermometer, a working flow meter and a working pressure gauge; the first online metering device group and the second online metering device group all include a standard thermometer, a standard flow meter and a standard pressure gauge.

7. The heat storage capacity measuring device of the thermal mass energy storage system according to claim 3 is characterized in that: The inner lining of the calorimetric medium storage tank is stainless steel, and high temperature resistant insulation material is directly filled between the inner lining and the outer surface; 1-3 temperature measuring points are arranged in the calorimetric medium storage tank, and all temperature measuring points are connected to the signal acquisition module.

8. A method for measuring the heat storage capacity of a thermal mass energy storage system according to any one of claims 1 to 7, characterized in that: The specific process is: S1, open the first stop valve and the second stop valve, start the fluid circulation pump, and drive the calorimetric medium to circulate; S2, opening the third stop valve and the fourth stop valve, so that the heat storage medium of the thermal mass energy storage system flows through the high adiabatic heat exchanger and exchanges heat with the calorimetric medium on the low temperature side; S3, the first thermal parameter measurement group, the second thermal parameter measurement group, the third thermal parameter measurement group and the fourth thermal parameter measurement group respectively measure the thermal parameters of the heat storage medium input of the thermal mass energy storage system, the heat storage medium output of the thermal mass energy storage system, the calorimetric medium input and the calorimetric medium output, and the signal acquisition module collects the measurement signal and transmits it to the operation parameter adjustment module, and the operation parameter adjustment module adjusts the opening of the first regulating valve and the second regulating valve and the cooling rate of the cooling tower accordingly, so that the thermal parameters such as the input and output temperature of the heat storage medium of the thermal mass energy storage system are consistent with its operating conditions; S4, maintaining stable operation until all the heat of the heat storage medium in the thermal mass energy storage system is transferred to the calorimetric medium through the highly adiabatic heat exchanger; S5. The heat absorbed by the calorimetric medium can be obtained according to the temperature, pressure and flow rate of the calorimetric medium input and output recorded in real time by the first thermal parameter measurement group and the second thermal parameter measurement group during operation, combined with the specific heat and density and other physical properties of the calorimetric medium, and according to the integral enthalpy value increment of the calorimetric medium during the operation period; S6. According to the measurement results of the temperature measurement points arranged on the high-insulation heat exchanger, combined with the pre-calibrated heat leakage rate of the high-insulation heat exchanger, the heat leakage amount of the high-insulation heat exchanger to the outside during the heat exchange process is obtained; according to the input and output temperatures of the calorimetric medium, combined with the thermal conductivity of the calorimetric medium and the ambient temperature, as well as the thermal conductivity of the pipe body of the pipe between the high-insulation heat exchanger and the first thermal parameter measurement group and the thermal conductivity of the insulation material wrapped on the pipe body, the weak heat leakage amount of the pipe between the high-insulation heat exchanger and the first thermal parameter measurement group is obtained; the sum of the weak heat leakage amount of the pipe is obtained by summing up the heat leakage amount of the high-insulation heat exchanger to the outside during the heat exchange process and the weak heat leakage amount of the pipe between the high-insulation heat exchanger and the first thermal parameter measurement group; S7, adding the heat absorbed by the calorimetric medium calculated in step S5 and the sum of the weak heat leakage of the pipe calculated in step S6 to obtain the heat storage capacity of the thermal mass energy storage system to be tested including the heat leakage.

9. The method according to claim 8, characterized in that During operation, the switching between the first stop valve and the fifth stop valve and the switching between the second stop valve and the sixth stop valve are realized, and the switching between the first thermal parameter measurement group and the first online metering device group and the switching between the second thermal parameter measurement group and the second online metering device group are realized. The thermal parameters measured by the first online metering device group and the second online metering device group are compared with the thermal parameters measured in the first thermal parameter measurement group and the second thermal parameter measurement group, respectively, and the measuring instruments of the first thermal parameter measurement group and the second thermal parameter measurement group are calibrated in time to ensure the accuracy and reliability of the measurement.

10. The method according to claim 8, characterized in that If an emergency situation of pipe blockage occurs, open the emergency drain bypass of the high-insulation heat exchanger to avoid excessive pressure inside the system.

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