Heat exchange performance test system and test method

Abstract

The present disclosure relates to a heat exchange performance testing system and a testing method, wherein the heat exchange performance testing system comprises a first flow path for exchanging heat with a heat storage device to be tested in a manner of releasing heat to the heat storage device; a second flow path for exchanging heat with the heat storage device in a manner of absorbing heat from the heat storage device; and a first measuring assembly for measuring a temperature difference before and after the first flow path and the second flow path exchange heat with the heat storage device; wherein the first flow path and the second flow path are designed as follows: the heat exchange medium of one of the first flow path and the second flow path flows to the other after flowing through the heat storage device, so that the first flow path, the second flow path and the heat storage device constitute a heat exchange cycle. The heat exchange performance testing system can test the heat storage performance and the heat release performance at the same time, significantly reduces the difficulty and complexity of the heat storage device performance testing, and greatly improves the testing efficiency, accuracy and universality.

Description

Technical Field

[0001] This disclosure relates to the technical field of heat transfer performance testing, specifically to a heat transfer performance testing system and testing method. Background Technology

[0002] Currently, performance testing of thermal energy storage technologies is generally conducted in laboratory conditions using equipment such as differential scanning calorimetry, thermogravimetric analysis, or simultaneous thermal analysis to systematically test sensible / phase change thermal energy storage materials, thereby evaluating their thermal energy storage performance. Alternatively, laboratory-scale experimental setups can be built to test the performance of the storage materials and the storage devices before scaling up and wider application. These methods are not only cumbersome to operate but also only applicable to single testing scenarios, lacking applicability testing for other temperature ranges or different operating conditions, and thus failing to meet diverse testing needs. Summary of the Invention

[0003] The purpose of this disclosure is to provide a heat exchange performance testing system and method to at least partially solve the technical problems existing in the related art.

[0004] To achieve the above objectives, this disclosure provides a heat transfer performance testing system, comprising: The first flow path is used to exchange heat with the thermal storage device in a manner that releases heat to the thermal storage device to be tested; A second flow path is used for heat exchange with the thermal storage device in a manner that absorbs heat from the thermal storage device; and A first measuring component is used to measure the temperature difference between the first flow path and the second flow path before and after heat exchange with the thermal storage device; The first flow path and the second flow path are designed such that the heat exchange medium of one flows to the other after passing through the heat storage device, so that the first flow path, the second flow path and the heat storage device constitute a heat exchange cycle.

[0005] Optionally, the first flow path includes: The first media management unit is used to store the heat exchange medium; A first conduit is disposed between the heat storage device and the first medium management unit. A first high-temperature pump and a first heat exchanger are mounted on the first conduit, with the first high-temperature pump located between the first heat exchanger and the first medium management unit. The second conduit is located between the heat storage device and the second flow path.

[0006] Optionally, it further includes a first branch pipe, the inlet end of which is connected to the side wall of the first conduit located between the first heat exchanger and the heat storage device, and the outlet end of the first branch pipe is connected to the second conduit.

[0007] Optionally, the second flow path includes: The second media management unit is used to store the heat exchange medium; A third conduit connects the thermal storage device and the second medium management unit. A second high-temperature pump and a second heat exchanger are mounted on the second conduit, with the second high-temperature pump located between the second heat exchanger and the thermal storage device. The fourth conduit is located between the heat storage device and the first flow path.

[0008] Optionally, a second branch pipe is included, the inlet end of which is connected to the side wall of the second conduit located between the second heat exchanger and the heat storage device, and the outlet end of the second branch pipe is connected to the fourth conduit.

[0009] Optionally, it also includes: Cooling tower; A circulation pipe, connected to the cooling tower, is used to circulate the coolant within the cooling tower and to exchange heat with the third conduit within the second heat exchanger; and A circulation pump is installed on the circulation pipeline.

[0010] Optionally, the first measurement component includes: The first measuring element is used to measure the temperature and flow rate of the heat exchange medium before heat exchange; and The second measuring element is used to measure the temperature and flow rate of the heat exchange medium after heat exchange.

[0011] Optionally, it further includes a second measuring component, the second measuring component comprising: The third measuring element is used to monitor the state parameters of the heat exchange medium inside the first conduit; and The fourth measuring element is used to monitor the state parameters of the heat exchange medium inside the third conduit.

[0012] Optionally, it also includes multiple safety components, with at least one of the safety components provided in the first flow path, the second flow path, and the thermal storage device, respectively. The safety components are configured to open when the pressure at their installation position is higher than a preset pressure to release pressure.

[0013] A second aspect of this disclosure provides a method for testing heat exchange performance, wherein the method applies the heat exchange performance testing system described above to test the heat storage performance of a heat storage device.

[0014] Through the above technical solution, the first flow path and the second flow path exchange heat with the thermal storage device respectively, and the three form a heat exchange cycle. The temperature difference between the first flow path and the second flow path before and after heat exchange is measured by the first test component. While enabling the heat exchange performance test system to test both thermal storage performance and heat release performance, it significantly reduces the difficulty and complexity of thermal storage device performance testing and greatly improves test efficiency, accuracy and versatility.

[0015] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is an overall schematic diagram of the heat exchange performance testing system provided in the exemplary embodiments of this disclosure; Figure 2 This is a schematic diagram of the heat exchange performance testing system provided by the exemplary embodiments of this disclosure under the heat storage conditions of the heat storage equipment; Figure 3 This is a schematic diagram of the heat exchange performance testing system provided by the exemplary embodiments of this disclosure under the over-temperature condition of the thermal storage equipment; Figure 4 This is a schematic diagram of the heat exchange performance testing system provided in the exemplary embodiments of this disclosure under the heat release condition of the thermal storage device; Figure 5 This is a schematic diagram of the heat exchange performance testing system provided in the exemplary embodiments of this disclosure under the heat release over-temperature condition of the heat storage device; Figure 6 This is a flowchart of a heat exchange performance testing method provided by an exemplary embodiment of this disclosure.

[0017] Explanation of reference numerals in the attached figures 1-Heat storage equipment; 11-First inlet; 12-First outlet; 13-Second inlet; 14-Second outlet; 2-First flow path; 201-First conduit; 202-Second conduit; 203-Fifth conduit; 21-First media management unit; 22-First heat exchanger; 23-First high-temperature pump; 24-Fifth valve; 25-First valve; 26-Second valve; 27-Third valve; 28-Fourth valve; 3-Second flow path; 301-Third conduit; 302-Fourth conduit; 303-Sixth conduit; 31-Second media management unit; 32-Second high-temperature pump; 33-Second heat exchanger; 34-Eleventh valve ; 35-Sixth valve; 36-Seventh valve; 37-Eighth valve; 38-Ninth valve; 39-Tenth valve; 41-First branch pipe; 411-Fourteenth valve; 42-Second branch pipe; 421-Fifteenth valve; 51-Cooling tower; 501-Circulation pipe; 52-Circulation pump; 53-Twelfth valve; 54-Thirteenth valve; 6-Safety assembly; 61-First pressure reducing valve; 62-Second pressure reducing valve; 63-Third pressure reducing valve; 64-First safety valve; 65-Second safety valve; 66-Third safety valve; 71-First thermometer; 72-First flow meter; 73-Second thermometer; 74-Second flow meter. Detailed Implementation

[0018] In this disclosure, unless otherwise stated, directional terms such as "inner" and "outer" refer to the outline of the corresponding component itself. Terms such as "first" and "second" used in this disclosure are for distinguishing one element from another and do not have sequential or importance. Furthermore, in the following description, when referring to the accompanying drawings, the same reference numerals in different drawings denote the same or similar elements.

[0019] Reference Figures 1-5This disclosure provides a heat exchange performance testing system for testing the heat storage performance of a thermal storage device 1. The system includes a first flow path 2, a second flow path 3, and a first testing component. The first flow path 2 is used to exchange heat with the thermal storage device 1 by releasing heat to it. In the embodiments provided in this disclosure, the first flow path 2 can be used to circulate a medium-temperature heat exchange medium to exchange heat with the thermal storage device 1, thereby achieving heat storage. The second flow path 3 is used to exchange heat with the thermal storage device 1 by absorbing heat from it. In the embodiments provided in this disclosure, the second flow path 3 can be used to circulate a low-temperature or room-temperature heat exchange medium to exchange heat with the thermal storage device 1, thereby achieving heat release. The first testing component can be used to measure the temperature difference between the first flow path 2 and the thermal storage device 1 before and after heat exchange, thereby determining the heat storage capacity of the thermal storage device 1. The first testing component can also measure the temperature difference between the second flow path 3 and the thermal storage device 1 before and after heat exchange, thereby determining the heat release capacity of the thermal storage device 1. The first flow path 2 and the second flow path 3 can be designed such that the heat exchange medium in one flows through the heat storage device 1 and then to the other, thus forming a heat exchange cycle among the first flow path 2, the second flow path 3, and the heat storage device 1. Specifically, the heat exchange medium in the first flow path 2 can flow through the heat storage device 1 and then to the second flow path 3, and then flow together with the heat exchange medium in the second flow path 3 to the heat storage device 1; the heat exchange medium in the second flow path 3 can flow through the heat storage device 1 and then to the first flow path 2, and then flow together with the heat exchange medium in the first flow path 2 to the heat storage device 1, thereby forming a heat exchange cycle among the first flow path 2, the heat storage device 1, and the second flow path 3. This design allows the heat exchange performance testing system to test both the heat storage performance and the heat release performance of the heat storage device 1. Furthermore, the circulating flow of the heat exchange medium effectively avoids the cumbersome process of separate testing in traditional testing methods, significantly reducing the testing difficulty and complexity, and greatly improving testing efficiency and accuracy.

[0020] In the embodiments provided in this disclosure, the heat exchange medium in the first flow path 2 and the second flow path 3 can also be selectively delivered to the thermal storage device 1 to realize the heat storage and heat release processes of the thermal storage device 1, thereby enabling comprehensive testing of the thermal storage device 1, improving the reliability of the testing of the thermal storage device 1, and reducing the failure rate of the thermal storage device 1. It should also be noted that the high temperature, low temperature, or medium temperature mentioned in this disclosure refers to the current temperature of the thermal storage device 1. This allows for the selection of a suitable heat exchange medium based on the actual temperature state of the thermal storage device 1 and the testing requirements during performance testing, facilitating accurate determination of the heat exchange capacity of the thermal storage device 1 during the heat release and heat storage processes, and ensuring the versatility of the measurement system. The first measuring component can be used to measure the changes in parameters before and after heat exchange between the heat exchange medium and the heat storage device 1. Here, the changed parameters refer to the heat difference between the inlet and outlet of the heat exchange medium in the heat storage device 1, reflecting the heat release or dissipation of the heat storage device 1 during operation. By calculating the formula power (P) = heat (Q) ÷ time (T), the heat storage power or heat release power of the heat storage device can be calculated, that is, the ability of the heat storage device 1 to store or release heat per unit time. The first measuring component can be used to measure the changes in parameters before and after heat exchange between the heat exchange medium and the heat storage device 1. Before and after the heat exchange medium flows through the heat storage device 1, the first measuring component detects the changes in parameters of the heat exchange medium after heat exchange, thereby evaluating the heat exchange performance of the heat storage device.

[0021] Through the above technical solution, the first flow path 2 and the second flow path 3 exchange heat with the heat storage device 1 respectively, and the three form a heat exchange cycle. The temperature difference between the first flow path 2 and the second flow path 3 before and after heat exchange is measured by the first test component. While enabling the heat exchange performance test system to test both heat storage performance and heat release performance, it significantly reduces the difficulty and complexity of the performance test of the heat storage device 1, and greatly improves the test efficiency, accuracy and versatility.

[0022] Reference Figure 1 and Figure 2The first flow path 2 may include a first media management unit 21, a first conduit 201, and a second conduit 202. The first medium management unit 21 can be used to output and store the heat exchange medium. In the embodiments provided in this disclosure, the first medium management unit 21 and the second medium management unit 31 mentioned below can be liquid storage tanks. The heat exchange medium can be, for example, heat transfer oil, high-pressure water, molten salt, etc., which are medium-temperature heat transfer media. The liquid storage tank is made of medium-temperature resistant metal materials, such as carbon steel, stainless steel, etc., and its shape can be vertical column, horizontal column, spherical, etc. This disclosure does not limit this. Its internal structure can adopt the type of external insulation and internal pressure bearing. The insulation material can be polyurethane, ceramic fiber, etc. This disclosure does not limit this. Its thermal conductivity at room temperature can be ≤0.03W / mK. In addition, the tank body of the heat storage tank can be equipped with safety components to ensure the stable operation of the test system. The safety components can be, for example, safety valves, pressure gauges, thermometers, and pressure regulating valves, so as to monitor the heat exchange medium contained inside in real time, ensure that the pressure and temperature inside the tank are kept within a stable range, and improve the safety of the heat storage equipment 1 during the performance test process.

[0023] The first conduit 201 can be disposed between the heat storage device 1 and the first medium management unit 21 for circulating the heat exchange medium, so that the heat exchange medium in the first medium management unit 21 flows to the heat storage device 1 for heat exchange. A first high-temperature pump 23 and a first heat exchanger 22 can be disposed on the first conduit 201, and the first high-temperature pump 23 can be located between the first heat exchanger 22 and the first medium management unit 21, so that the first high-temperature pump 23 and the first heat exchanger 22 can be arranged sequentially along the flow direction of the heat exchange medium. The first heat exchanger 22 can be a heater, which can finely adjust the temperature of the heat exchange medium at the first inlet 11 of the heat storage device 1 according to the needs of the heat storage device 1, and facilitate the realization and satisfaction of the heat storage performance evaluation of the heat storage device 1. This disclosure does not limit the specific type of the first heat exchanger 22 and the second heat exchanger 33 mentioned below; they can be electrically heated, gas-heated, or steam-heated. The first high-temperature pump 23 can be connected between the first heat exchanger 22 and the first inlet 11 of the heat storage device 1 for pumping the heat exchange medium, thereby adjusting the flow rate or circulation speed of the heat exchange medium according to the heat exchange requirements. In the embodiments provided in this disclosure, the first high-temperature pump 23 and the second high-temperature pump 32 mentioned below can be high-temperature pumps, which can be centrifugal, piston, axial flow, or shielded. This disclosure does not limit them.

[0024] The second conduit 202 can be disposed between the heat storage device 1 and the second flow path 3 to convey the heat exchange medium after heat exchange with the heat storage device 1 to the second flow path 3, in preparation for the next heat release performance test of the heat storage device 1. The first conduit 201 and the second conduit 202 can be made of metal to ensure strength. In the embodiments provided in this disclosure, the first conduit 201 and the second conduit 202 can be constructed as an integrally formed tube passing through the heat storage device 1, or the first conduit 201 and the second conduit 202 can also be two independent conduits respectively connected to the first inlet 11 and the first outlet 12 of the heat storage device 1. It should be noted that the heat exchange medium in the first flow path 2 and the second flow path 3 can be indirect heat exchange with the heat storage device 1. It is understood that in this heat exchange method, the heat storage material and the heat exchange medium in the heat storage device 1 can be separated by a solid wall, for example, and heat can be exchanged through the solid wall.

[0025] Reference Figure 1 The heat exchange performance testing system provided in this disclosure also includes multiple control valves. These valves can be opened and closed according to different testing requirements. To avoid redundancy, they will not be listed here, but will be shown one by one when describing each operating condition later.

[0026] Reference Figure 1 and Figure 2 During normal operation of the thermal storage device 1, under the condition of testing the thermal storage performance of the thermal storage device 1, the first flow path 2 delivers the heat exchange medium to the thermal storage device 1. Specifically, the first valve 25, the second valve 26, the third valve 27 on the first flow path 2, and the fourth valve 28 and the fifth valve 24 of the second conduit 202 are opened. The heat exchange medium is output through the first conduit 201 and the first medium management unit 21, and then flows through the first high-temperature pump 23 and the first heat exchanger 22 in sequence. After exchanging heat with the thermal storage device 1, it is then delivered to the second medium management unit 31 mentioned below through the second conduit 202. This completes the thermal storage process of the thermal storage device 1 and prepares for the next heat release performance test of the thermal storage device 1.

[0027] Accordingly, this disclosure provides a method for testing heat transfer performance, referring to... Figure 1 , Figure 2 as well as Figure 6 The method includes step S100, where the first medium management unit 21 outputs heat exchange medium, which is then conditioned by the first heat exchanger 22 and exchanged with the heat storage device 1 before flowing to the second flow path 3.

[0028] Reference Figure 1 and Figure 3The heat exchange performance testing system may also include a first branch pipe 41. The inlet end of the first branch pipe 41 is connected to the side wall of the first conduit 201 located between the first heat exchanger 22 and the heat storage device 1, and the outlet end of the first branch pipe 41 is connected to the second conduit 202. With this design, in the event of an overheating condition (exceeding the upper limit of the thermal storage temperature of thermal storage equipment 1) during the thermal storage performance test of thermal storage equipment 1, the first high-temperature pump 23, the third valve 27, and the fourth valve 28 will be closed, while the first valve 25, the second valve 26, the fifth valve 24 on the first flow path 2, and the fourteenth valve 411 on the first branch pipe 41 will be opened. The heat exchange medium will be discharged through the first conduit 201 and the first medium management unit 21, and then flow through the first heat exchanger 22 for temperature regulation. It will bypass thermal storage equipment 1 and directly flow through the first branch pipe 41 to the second conduit 202. Then, the heat exchange medium will flow directly through the second conduit 202 to the second flow path 3 to merge with the heat exchange medium in the second flow path 3. Then, the valve on the second flow path 3 can be opened to carry out the heat exchange cycle for thermal storage equipment 1 to absorb heat.

[0029] Accordingly, this disclosure provides a heat transfer performance testing method, referring to... Figure 1 , Figure 4 as well as Figure 6 The method includes step S300, where the first medium management unit 21 outputs heat exchange medium, and the heat exchange medium bypasses the heat storage device 1 and flows directly to the second flow path 3 after being conditioned by the first heat exchanger 22, so as to merge with the heat exchange medium in the second flow path 3.

[0030] Reference Figure 1 and Figure 4 The second flow path 3 may include a second medium management unit 31, a third conduit 301, and a fourth conduit 302. The second medium management unit 31 can be used to output and store the heat exchange medium. The third conduit 301 can be located between the heat storage device 1 and the second medium management unit 31 for the flow of the heat exchange medium, allowing the heat exchange medium in the second medium management unit 31 to flow to the heat storage device 1 for heat exchange. A second high-temperature pump 32 and a second heat exchanger 33 can be installed on the third conduit 301, and the second high-temperature pump 32 can be located between the second heat exchanger 33 and the second medium management unit 31, so that the second high-temperature pump 32 and the second heat exchanger 33 can be sequentially arranged along the flow direction of the heat exchange medium. The second high-temperature pump 32 can be connected between the second heat exchanger 33 and the second inlet 13 of the heat storage device 1 for pumping the heat exchange medium, thereby allowing the flow rate or velocity of the heat exchange medium to be adjusted according to heat exchange requirements.

[0031] The fourth conduit 302 can be disposed between the heat storage device 1 and the first flow path 2 to allow the heat exchange medium after heat exchange with the heat storage device 1 to pass through the fourth conduit 302 to the first flow path 2, in preparation for the next heat storage performance test of the heat storage device 1. The third conduit 301 and the fourth conduit 302 can also be made of metal to ensure strength. In the embodiments provided in this disclosure, the third conduit 301 and the fourth conduit 302 can be constructed as an integrally formed pipe that can penetrate the heat storage device 1, or the third conduit 301 and the fourth conduit 302 can also be two independent conduits respectively connected to the second inlet 13 and the second outlet 14 of the heat storage device 1.

[0032] Reference Figure 1 and Figure 4 During normal operation of the thermal storage device 1, and under the condition of testing the heat release performance of the thermal storage device 1, the second flow path 3 delivers the heat exchange medium to the thermal storage device 1. Specifically, the sixth valve 35, the seventh valve 36, the eighth valve 37, the ninth valve 38, the tenth valve 39 on the second flow path 3, and the eleventh valve 34 on the fourth conduit 302 are opened. The heat exchange medium is output through the second medium management unit 31 via the third conduit 301, and then flows through the second high-temperature pump 32 and the second heat exchanger 33 in sequence. After flowing through the thermal storage device 1 and exchanging heat with it, it is then delivered to the first medium management unit 21 via the fourth conduit 302. This completes the heat release process of the thermal storage device 1 and prepares for the next thermal storage performance test of the thermal storage device 1.

[0033] Accordingly, this disclosure provides a method for testing heat transfer performance, referring to... Figure 1 , Figure 4 as well as Figure 6 The method includes step S200, in which the second medium management unit 31 outputs heat exchange medium, which is then conditioned by the second heat exchanger 33 and exchanges heat with the heat storage device 1, and then flows to the first flow path 2.

[0034] Reference Figure 1 and Figure 5The heat exchange performance testing system may also include a second branch pipe 42, the inlet end of which is connected to the side wall of the second conduit 202 located between the second heat exchanger 33 and the heat storage device 1, and the outlet end of the second branch pipe 42 is connected to the fourth conduit 302. With this design, in the event of an overheating condition (exceeding the lower limit of the heat storage temperature of the heat storage device 1) during the heat release performance test of the heat storage device 1, the ninth valve 38 and the tenth valve 39 will be closed, and the sixth valve 35, the seventh valve 36, the eighth valve 37, the eleventh valve 34 and the fifteenth valve 421 on the second flow path 3 will be opened. The heat exchange medium will be discharged through the third conduit 301 and the second medium management unit 31, and then flow through the second heat exchanger 33 for temperature regulation. It will bypass the heat storage device 1 and directly pass through the second branch pipe 42 to the fourth conduit 302. Then, the heat exchange medium will flow directly through the fourth conduit 302 to the first flow path 2 to merge with the heat exchange medium in the first flow path 2. Then, the valves on the first flow path 2 can be opened to carry out the heat exchange cycle for the heat storage device 1 to release heat.

[0035] Accordingly, this disclosure provides a method for testing heat transfer performance, referring to... Figure 1 , Figure 5 as well as Figure 6 The method includes step S400, in which the second medium management unit 31 outputs heat exchange medium, and after the heat exchange medium is regulated by the second heat exchanger 33, it bypasses the heat storage device 1 and flows directly to the first flow path 2 to merge with the heat exchange medium in the first flow path 2.

[0036] It should be noted that the above steps are only used to distinguish the flow mode of the heat exchange medium under different operating conditions of the heat storage equipment 1, and do not have a chronological order.

[0037] Reference Figure 1 and Figure 5 The heat exchange performance testing system may also include a cooling tower 51, a circulation pipe 501, and a circulation pump 52. The second heat exchanger 33 mentioned above can be a partition wall heat exchanger. The cooling tower 51 can be used to provide coolant. The inlet and outlet of the circulation pipe 501 can be connected to the cooling tower 51 respectively, and partially pass through the second heat exchanger 33 to exchange heat with the heat exchange medium flowing through the second flow path 3 of the second heat exchanger 33. The circulation pump 52 can provide transportation power for the coolant in the circulation pipe 501, so that the coolant can flow through the second heat exchanger 33 and exchange heat with the heat exchange medium during the circulation of the coolant in the cooling tower 51, thereby adjusting the temperature and flow rate of the heat exchange medium in the third conduit 301. The heat exchange performance testing system provided in this disclosure may also include a twelfth valve 53 and a thirteenth valve 54 to adjust the flow rate and flow rate of the coolant, thereby meeting the different heat exchange requirements of the heat exchange medium, improving the versatility of the heat exchange performance testing system, and reducing the testing difficulty.

[0038] In the embodiments provided in this disclosure, the first measuring component may include multiple first measuring elements and multiple second measuring elements. Specifically, at least one first measuring element may be provided at the first inlet 11 and the second inlet 13 respectively, so as to measure the flow rate and temperature of the heat exchange medium before it flows into the heat storage device 1 for heat exchange in a timely manner. At least one second measuring element may be provided at the first outlet 12 and the second outlet 14 respectively, so as to measure the discharge temperature and discharge flow rate of the heat exchange medium before it flows out of the heat storage device 1 in a timely manner. By comparing the temperature and flow rate of the heat exchange medium at the inlet 11 and the outlet 12, the accuracy and timeliness of the test of the heat exchange capacity of the heat storage device 1 can be effectively improved. In the embodiments provided in this disclosure, the heat exchange performance testing system may also include multiple fifth temperature measuring elements, which are distributed at intervals on the heat storage device 1 according to the specific structure of the heat storage device 1, and are used to measure the temperature at various locations of the heat storage device 1, so as to determine the temperature uniformity of the heat storage device 1 itself, thereby facilitating the selection of suitable heat storage materials to manufacture the heat storage device 1 according to the heat storage requirements.

[0039] Reference Figure 1 The heat exchange performance testing system provided in this disclosure also includes a second measuring component, which may include a third measuring element and a fourth measuring element. The third measuring element can be disposed on the side wall of the first conduit 201 mentioned above, located between the first heat exchanger 22 and the first inlet 11, and is used to monitor the state parameters of the heat exchange medium. It should be noted that, in the embodiments provided in this disclosure, the state parameters can be the pressure, flow rate, and temperature of the heat exchange medium. Figure 1As shown, the third measuring element may include a first thermometer 71 and a first flow meter 72 to detect the temperature and flow rate of the heat exchange medium before it is delivered to the heat storage device 1. The first high-temperature pump 23 can control the delivery efficiency of the heat exchange medium according to the detection result of the first flow meter 72, thereby adjusting the delivery volume of the heat exchange medium. The first heat exchanger 22 can adjust the temperature of the heat exchange medium according to the feedback result of the first thermometer 71. This design can effectively achieve the temperature stability of the heat exchange medium before it is delivered to the heat storage device 1, ensure the stability of the heat exchange medium parameters at the first inlet 11, and make the heat exchange medium have a relatively stable working state when it flows to the heat storage device 1, thereby effectively improving the accuracy of the performance test of the heat storage device 1. The fourth measuring element can be installed on the side wall between the second heat exchanger 33 and the heat storage device 1 via the aforementioned third conduit 301, for monitoring the state parameters of the heat exchange medium. This fourth measuring element may include a second thermometer 73 and a second flow meter 74 to detect the temperature and flow rate of the heat exchange medium before it is delivered to the heat storage device 1. The circulating pump 52 can adjust the flow parameters of the coolant based on the detection results of the second thermometer 73, thereby adjusting the temperature of the heat exchange medium. The second high-temperature pump 32 can control the delivery flow rate of the heat exchange medium based on the detection results of the second flow meter 74, thereby adjusting the delivery volume of the heat exchange medium. This design can effectively achieve the flow rate stability of the heat exchange medium before it is delivered to the heat storage device 1, ensuring the stability of the heat exchange medium parameters at the second inlet 13, so that the heat exchange medium has a relatively stable working state when it flows to the heat storage device 1, thereby effectively improving the accuracy of the performance test of the heat storage device 1.

[0040] Reference Figure 1The heat exchange performance testing system provided in this disclosure may also include multiple safety components 6, which can be configured to open when the pressure at their installation position is higher than a preset pressure to relieve pressure. Each safety component 6 may include a pressure reducing valve and a safety valve. The first flow path 2, the second flow path 3, and the heat storage device 1 may each be provided with at least one safety component 6. The heat storage device 1 may be provided with a first pressure reducing valve 61 and a first safety valve 64. When the heat storage device 1 experiences overpressure during the heat storage or heat release process, the pressure can be relieved by opening the first pressure reducing valve 61 on the heat storage device 1. When the pressure after pressure relief is insufficient to meet safety requirements, the first safety valve 64 can be opened to further relieve pressure on the heat storage device 1, thereby reducing the internal pressure of the heat storage device 1 to a safe range. A second pressure-reducing valve 62 and a second safety valve 65 can be spaced apart on the second conduit 202. When the pressure of the heat exchange medium flowing through the second conduit 202 exceeds the safe range, the pressure can be released by opening the second pressure-reducing valve 62. If the pressure after release is insufficient to meet safety requirements, the second safety valve 65 can be opened to reduce the pipeline pressure of the second conduit 202, thereby improving the stability of the heat exchange medium flowing through the second conduit 202 to the second medium management unit 31. A third pressure-reducing valve 63 and a third safety valve 66 can be spaced apart on the fourth conduit 302. When the pressure of the heat exchange medium flowing through the fourth conduit 302 exceeds the safe range, the pressure can be released by opening the third pressure-reducing valve 63. If the pressure after release is insufficient to meet safety requirements, the third safety valve 66 can be opened to reduce the pipeline pressure, thereby improving the stability of the heat exchange medium flowing through the first medium management unit 21.

[0041] According to a second aspect of this disclosure, a method for testing heat exchange performance is provided. This method uses a heat exchange performance testing system provided by this disclosure to test the heat storage performance of a thermal storage device. To avoid redundancy, the specific operation process and details of this testing method can be found in the relevant sections above. Furthermore, this heat exchange performance testing method possesses all the beneficial effects of the heat exchange performance testing system provided by this disclosure, which will not be elaborated upon here.

[0042] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0043] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0044] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A heat exchange performance testing system, characterized in that, include: The first flow path is used to exchange heat with the thermal storage device in a manner that releases heat to the thermal storage device to be tested; A second flow path is used to exchange heat with the thermal storage device in a manner that absorbs heat from the thermal storage device; as well as A first measuring component is used to measure the temperature difference between the first flow path and the second flow path before and after heat exchange with the thermal storage device; The first flow path and the second flow path are designed such that the heat exchange medium of one flows to the other after passing through the heat storage device, so that the first flow path, the second flow path and the heat storage device constitute a heat exchange cycle.

2. The heat exchange performance testing system according to claim 1, characterized in that, The first flow path includes: The first medium management unit is used to store the heat exchange medium; A first conduit is disposed between the heat storage device and the first medium management unit. A first high-temperature pump and a first heat exchanger are mounted on the first conduit, with the first high-temperature pump located between the first heat exchanger and the first medium management unit. The second conduit is located between the heat storage device and the second flow path.

3. The heat exchange performance testing system according to claim 2, characterized in that, It also includes a first branch pipe, the inlet end of which is connected to the side wall of the first conduit located between the first heat exchanger and the heat storage device, and the outlet end of the first branch pipe is connected to the second conduit.

4. The heat exchange performance testing system according to claim 2, characterized in that, The second flow path includes: The second media management unit is used to store the heat exchange medium; A third conduit connects the thermal storage device and the second medium management unit. A second high-temperature pump and a second heat exchanger are mounted on the second conduit, with the second high-temperature pump located between the second heat exchanger and the thermal storage device. The fourth conduit is located between the heat storage device and the first flow path.

5. The heat transfer performance testing system according to claim 4, characterized in that, It includes a second branch pipe, the inlet end of which is connected to the side wall of the second conduit located between the second heat exchanger and the heat storage device, and the outlet end of which is connected to the fourth conduit.

6. The heat transfer performance testing system according to claim 4, characterized in that, Also includes: Cooling tower; A circulation pipe is connected to the cooling tower for circulating the coolant in the cooling tower and for exchanging heat with the third conduit in the second heat exchanger. as well as A circulation pump is installed on the circulation pipeline.

7. The heat transfer performance testing system according to claim 1, characterized in that, The first measurement component includes: The first measuring element is used to measure the temperature and flow rate of the heat exchange medium before heat exchange at the inlet of the thermal storage device; and The second measuring element is used to measure the temperature and flow rate of the heat exchange medium after heat exchange at the outlet of the thermal storage device.

8. The heat transfer performance testing system according to claim 4, characterized in that, It also includes a second measuring component, the second measuring component comprising: The third measuring element is used to monitor the state parameters of the heat exchange medium inside the first conduit; and The fourth measuring element is used to monitor the state parameters of the heat exchange medium inside the third conduit.

9. The heat transfer performance testing system according to claim 1, characterized in that, It also includes multiple safety components. The first flow path, the second flow path, and the thermal storage device are each provided with at least one of the safety components. The safety components are configured to open when the pressure at their installation position is higher than a preset pressure in order to release pressure.

10. A method for testing heat transfer performance, characterized in that, The method uses the heat exchange performance testing system according to any one of claims 1-9 to test the heat storage performance of the heat storage equipment.

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