Method for testing thickness of temperature stratification water mixing area of energy storage water tank

Abstract

This application provides a method for testing the thickness of the mixing zone in a temperature-stratified energy storage tank, relating to the technical field of energy storage tanks. The method includes acquiring the tank's liquid level, operating conditions, and working parameters; determining temperature measurement points based on the liquid level and a preset number of measurement points; analyzing the tank's operating conditions to determine the temperature recording period; analyzing the tank's working parameters to determine the sampling temperature value; and analyzing the tank's working parameters, temperature measurement points, temperature recording period, and sampling temperature value to determine the average thickness of the mixing zone. This application effectively improves the measurement accuracy of the mixing zone thickness in energy storage tanks.

Description

Technical Field

[0001] This application relates to the technical field of energy storage tanks, and in particular to a method for testing the thickness of the temperature stratification mixing zone in an energy storage tank. Background Technology

[0002] The method for testing the thickness of the mixing zone in a storage tank with temperature stratification refers to a method for determining the thickness of the mixing zone in a storage tank by measuring the temperature and time changes at different locations within the tank. The aim is to improve the measurement accuracy of the mixing zone thickness in a storage tank.

[0003] In related technologies, the method for testing the thickness of the temperature stratification mixing zone in an energy storage tank typically involves measuring the thickness of the mixing zone at vertical intervals inside the energy storage tank. A series of cable-type temperature sensors are deployed. During the energy storage or release process, the temperature values ​​monitored by the cable-type temperature sensors are read and recorded in real time. The upper and lower boundaries of the mixing zone are then calculated based on the temperature values. Finally, the thickness of the mixing zone is obtained by calculating the vertical distance between the upper and lower boundaries.

[0004] Regarding the aforementioned technologies, vertical spacing is incorporated inside the energy storage tank. A series of cable-type temperature sensors are installed, but at intervals... The low density of cable-based temperature sensors reduces the accuracy of measuring the thickness of the mixing zone in the energy storage tank, leaving room for improvement. Summary of the Invention

[0005] To ensure the accuracy of the measurement of the thickness of the mixing zone in an energy storage tank, this application provides a method for testing the thickness of the temperature-stratified mixing zone in an energy storage tank.

[0006] In a first aspect, this application provides a method for testing the thickness of the temperature stratification mixing zone in an energy storage water tank, employing the following technical solution: A method for testing the thickness of the temperature stratification mixing zone in an energy storage water tank, comprising: Obtain the tank liquid level, energy storage tank operating status information, and energy storage tank operating parameters; The temperature measurement points are determined based on the liquid level in the tank and the number of preset measurement points. Analyze the operating information of the energy storage tank to determine the temperature recording cycle; The operating parameters of the energy storage tank were analyzed to determine the sampling temperature value; The operating parameters, temperature measurement points, temperature recording cycle, and sampling temperature values ​​of the energy storage tank were analyzed to determine the average thickness of the mixing zone.

[0007] Optionally, the steps for determining the temperature measurement points based on the tank liquid level and the preset number of measurement points include: Calculate the sum of the number of measuring points and the preset number of benchmark compensations to generate the number of measuring point segments; Calculate the quotient of the tank liquid level height and the number of measuring point segments to generate the height difference of the measuring points; The temperature measurement points of the preset energy storage tank are determined based on the height difference between the measurement points.

[0008] Optionally, the steps of analyzing the operating information of the energy storage tank to determine the temperature recording period include: Determine whether the energy storage tank's operating condition information is the preset cold storage operating condition information or the preset cold release operating condition information; If it is information about cold storage conditions, then the preset cold storage detection cycle is defined as the temperature recording cycle; If it is cooling operation information, then the preset cooling detection cycle is defined as the temperature recording cycle.

[0009] Optionally, the steps of analyzing the operating parameters of the energy storage tank to determine the sampling temperature value include: Determine the initial and final energy storage temperatures based on the operating parameters of the energy storage tank. Calculate the absolute value of the difference between the final energy storage temperature and the initial energy storage temperature to generate the energy storage temperature difference value; The initial energy storage temperature, the final energy storage temperature, and the energy storage temperature difference are analyzed to determine the sampling temperature value.

[0010] Optionally, the steps of analyzing the initial energy storage temperature, the final energy storage temperature, and the energy storage temperature difference to determine the sampling temperature value include: Calculate the product of the energy storage temperature difference and the preset temperature ratio to generate the sampled temperature change value; The changes in the initial energy storage temperature and the sampling temperature were analyzed to determine the initial sampling temperature. The changes in the final energy storage temperature and the sampling temperature are analyzed to determine the final sampling temperature value. Associate the initial and final sampled temperature values ​​to generate the sampled temperature value.

[0011] Optionally, the steps to determine the average thickness of the mixing zone by analyzing the operating parameters of the energy storage tank, temperature measurement points, temperature recording period, and sampling temperature values ​​include: The temperature value of the temperature measurement point is obtained according to the temperature recording period; Analyze the temperature values ​​at the measurement points and the sampling temperatures to determine the current sampling time; Calculate the difference between the current sampling times to generate the sampling time difference; The sampling time difference and the operating parameters of the energy storage tank were analyzed to determine the average thickness of the mixing zone.

[0012] Optionally, the steps of analyzing the temperature values ​​at the measurement points and the sampling temperatures to determine the current sampling time include: Determine whether the temperature value at the measurement point meets the preset sampling temperature requirement; If it does not meet the requirements, continue to obtain the temperature value of the measurement point and perform a loop judgment; If the conditions are met, the current sampling time is obtained.

[0013] Optionally, the steps of analyzing the sampling time difference and the operating parameters of the energy storage tank to determine the average thickness of the mixing zone include: Determine the flow rate and cross-sectional area of ​​the energy storage tank based on its operating parameters; Calculate the quotient of the energy storage tank flow rate and the energy storage tank cross-sectional area to generate the average flow velocity of the tank cross-section; Calculate the product of the average flow velocity at the tank cross-section and the sampling time difference to generate the thickness of the mixed zone at the measuring point; Calculate the average thickness of the muddy zone at each measuring point to generate the average thickness of the muddy zone.

[0014] In summary, this application includes at least one of the following beneficial technical effects: 1. By determining the temperature measurement points based on the tank liquid level and the number of measuring points, the temperature recording cycle is determined after analyzing the operating information of the energy storage tank, and the sampling temperature value is determined after analyzing the operating parameters of the energy storage tank. Thus, the average thickness of the mixed water zone is determined after analyzing the operating parameters of the energy storage tank, the temperature measurement points, the temperature recording cycle, and the sampling temperature value. The temperature measurement points are determined by the tank liquid level and the number of measuring points, which effectively offsets the reduced accuracy caused by the fixed-interval cable temperature sensors, thereby ensuring the improvement of the measurement accuracy of the mixed water zone thickness of the energy storage tank. 2. By calculating the product of the energy storage temperature difference and the temperature ratio, the sampling temperature change value is generated. The initial sampling temperature value is determined by analyzing the initial energy storage temperature and the sampling temperature change value. The final sampling temperature value is determined by analyzing the final energy storage temperature and the sampling temperature change value. By correlating the initial sampling temperature value and the final sampling temperature value, the sampling temperature value is generated, thereby determining the temperature triggering condition when sampling over time, and thus providing data support for the subsequent determination of the average thickness of the mixing zone. 3. The average flow velocity of the tank section is generated by calculating the quotient of the flow rate and the cross-sectional area of ​​the energy storage tank. The product of the average flow velocity and the sampling time difference is then used to generate the thickness of the mixing zone at the measuring point. The average thickness of the mixing zone at the measuring point is then calculated to generate the average thickness of the mixing zone. This effectively offsets the influence of the difference in the thickness of the mixing zone at different heights, thereby improving the measurement accuracy of the mixing zone thickness of the energy storage tank. Attached Figure Description

[0015] Figure 1 This is a flowchart of a method for testing the thickness of the temperature stratification mixing zone in an energy storage water tank, as described in an embodiment of this application.

[0016] Figure 2 This is a flowchart of the steps for determining temperature measurement points based on the liquid level in the tank and the preset number of measurement points in this embodiment of the application.

[0017] Figure 3 This is a flowchart of the steps in this application embodiment to analyze the operating information of the energy storage tank to determine the temperature recording cycle.

[0018] Figure 4 This is a flowchart of the steps in this application embodiment to analyze the operating parameters of the energy storage tank to determine the sampling temperature value.

[0019] Figure 5 This is a flowchart of the steps in this application embodiment to analyze the initial energy storage temperature, the final energy storage temperature, and the energy storage temperature difference to determine the sampling temperature value.

[0020] Figure 6 This is a flowchart of the steps in this application embodiment to analyze the working parameters of the energy storage tank, temperature measurement points, temperature recording period, and sampling temperature values ​​to determine the average thickness of the mixing zone.

[0021] Figure 7 This is a flowchart of the steps in this application embodiment to analyze the temperature value of the measurement point and the sampling temperature value to determine the current sampling time.

[0022] Figure 8 This is a flowchart of the steps in this application embodiment to analyze the sampling time difference and the operating parameters of the energy storage tank to determine the average thickness of the mixing zone. Detailed Implementation

[0023] To make the purpose, technical solution, and advantages of this application clearer, the following description is provided in conjunction with the appendix. Figures 1 to 8 The present application will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the application.

[0024] This application discloses a method for testing the thickness of the mixed water zone in a thermal stratification system of an energy storage tank. Specifically, it discloses an energy storage tank and a processing terminal. The processing terminal is communicatively connected to the energy storage tank to achieve data interaction and control. After acquiring the tank's liquid level, operating conditions, and working parameters, the processing terminal determines temperature measurement points based on the tank's liquid level and the number of measuring points. It then analyzes the tank's operating conditions to determine the temperature recording period and analyzes the tank's working parameters to determine the sampling temperature value. Finally, it analyzes the tank's working parameters, temperature measurement points, temperature recording period, and sampling temperature value to determine the average thickness of the mixed water zone. By determining the temperature measurement points based on the tank's liquid level and the number of measuring points, the method effectively offsets the reduced accuracy caused by fixed-interval cable-type temperature sensors, thereby ensuring improved measurement accuracy of the mixed water zone thickness in the energy storage tank.

[0025] Reference Figure 1 This application discloses a method for testing the thickness of the temperature stratification mixing zone in an energy storage water tank, comprising the following steps: Step S100: Obtain the tank liquid level, energy storage tank operating condition information, and energy storage tank operating parameters.

[0026] The tank level refers to the height of the liquid inside the energy storage tank, which is detected by a non-contact radar level gauge installed at the center of the tank top. The tank level is strongly correlated with the temperature measurement point. When the tank level is high, the number of measurement points should be increased to improve detection accuracy, thereby providing data support for subsequent determination of the temperature measurement point.

[0027] Energy storage tank operating condition information refers to the current operating condition type of the energy storage tank, such as energy storage condition information and cooling condition information. This information is generated by the energy storage tank sending a voltage level signal representing its current operating condition to the processing terminal. The processing terminal determines the corresponding operating condition information based on the voltage level signal. By determining the energy storage tank's operating condition information, the current working status of the energy storage tank can be determined, facilitating the subsequent determination of the temperature recording cycle.

[0028] The operating parameters of the energy storage tank refer to the relevant parameters during its operation, including the initial energy storage temperature, the final energy storage temperature, the flow rate, and the cross-sectional area. The initial and final energy storage temperatures are obtained by temperature sensors installed in the tank at the start and end of energy storage, respectively. Determining these temperatures determines the trigger temperature for sampling. The flow rate is measured by a flow sensor installed in the tank. The flow rate is strongly correlated with the average flow velocity across the tank cross-section. With a constant cross-sectional area, a higher flow rate indicates a greater flow rate through the tank cross-section per unit time, thus resulting in a higher average flow velocity. The cross-sectional area is obtained from the product specifications provided by the energy storage tank manufacturer. A larger cross-sectional area results in a lower average vertical movement speed of the cold water along the tank, leading to a lower average flow velocity across the tank cross-section, thus providing data support for determining the average flow velocity.

[0029] Step S101: Determine the temperature measurement points based on the tank liquid level and the preset number of measurement points.

[0030] Among them, temperature measurement points refer to the points in the energy storage tank where the temperature is measured. These points are obtained by analyzing the tank's liquid level and the number of measurement points at the processing terminal. Specific methods are detailed in [reference needed]. Figure 2 The steps involve determining temperature measurement points that are compatible with the liquid level in the tank. This effectively offsets the reduced accuracy caused by laying cable-type temperature sensors at fixed intervals, thereby ensuring improved measurement accuracy of the mixing zone thickness in the energy storage tank.

[0031] The number of measuring points refers to the number of temperature measuring points. For example, if the liquid level in the tank is... The number of measuring points can be set to 3, which can be predetermined by the operator. By determining the number of measuring points, the temperature measurement points that are appropriate for the liquid level in the tank can be identified, thus providing data support for determining the temperature measurement points.

[0032] Step S102: Analyze the operating information of the energy storage tank to determine the temperature recording cycle.

[0033] The temperature recording period refers to the period during which the NTC thermistor temperature sensor in the energy storage tank collects the temperature. This period is obtained by the processing terminal after analyzing the energy storage tank's operating condition information. Specific methods are detailed in [reference needed]. Figure 3 The steps involve determining the temperature recording period to accurately capture temperature changes based on different operating conditions of the energy storage tank, thereby ensuring improved measurement accuracy of the mixing zone thickness in the energy storage tank.

[0034] Step S103: Analyze the operating parameters of the energy storage tank to determine the sampling temperature value.

[0035] The sampling temperature value refers to the temperature value that triggers the sampling, which is obtained by the processing terminal after analyzing the operating parameters of the energy storage tank. For specific methods, please refer to [reference needed]. Figure 4 The steps involve determining the sampling temperature value to pinpoint the time when the temperature at the measurement point reaches the required sampling temperature, thus providing data support for subsequently determining the average thickness of the mixed water zone.

[0036] Step S104: Analyze the operating parameters of the energy storage tank, temperature measurement points, temperature recording cycle, and sampling temperature values ​​to determine the average thickness of the mixing zone.

[0037] The average thickness of the mixing zone refers to the average thickness of the mixing zone within the energy storage tank. This is obtained by analyzing the energy storage tank's operating parameters, temperature measurement points, temperature recording cycle, and sampling temperature values ​​at the processing terminal. Specific methods are detailed in [reference needed]. Figure 6 The steps involve determining the average thickness of the mixing zone to accurately obtain the thickness of the mixing zone in the energy storage tank, thereby ensuring the improvement of the measurement accuracy of the mixing zone thickness in the energy storage tank.

[0038] Reference Figure 2 The steps for determining temperature measurement points based on the tank liquid level and the preset number of measurement points include: Step S200: Calculate the sum of the number of measuring points and the preset number of benchmark compensations to generate the number of measuring point segments.

[0039] The number of measurement point segments refers to the number of segments into which the tank liquid level height is divided by temperature measurement points. This number is calculated by the processing terminal by summing the number of measurement points and the baseline compensation number. By determining the number of measurement point segments, the height interval between each temperature measurement point is determined, thus providing data support for subsequently determining the height difference between measurement points.

[0040] The baseline compensation quantity refers to the amount of compensation added to calculate the number of segments into which the tank liquid level height is divided by the temperature measurement points. This quantity is pre-set by the operator; in this step, it is set to 1. By determining the baseline compensation quantity, the number of segments into which the tank liquid level height can be divided by the temperature measurement points is determined, facilitating the subsequent determination of the height difference between the measurement points.

[0041] Step S201: Calculate the quotient of the tank liquid level height and the number of measuring point segments to generate the height difference of the measuring points.

[0042] The height difference between measurement points refers to the height interval between temperature measurement points, which is obtained by the processing terminal by calculating the quotient of the tank liquid level height and the number of measurement point segments. By determining the height difference between measurement points, it is possible to determine that, under the condition that the tank liquid level height remains constant, the more measurement point segments there are, the more segments the tank liquid level height is divided into, and therefore the smaller the height difference between measurement points, which facilitates the subsequent determination of temperature measurement points.

[0043] Step S202: Determine the temperature measurement point of the preset energy storage tank based on the height difference of the measurement points.

[0044] After determining the height difference of the measurement points, the processing terminal determines the temperature measurement points on the same vertical axis of the energy storage tank based on the height difference. For example, if the liquid level height in the tank is... If the number of measuring points is 3, then the number of measuring point segments is . The height difference between the measurement points is At this time, the heights of the three temperature measurement points are respectively at the distance from the upper liquid level. Place, place and By determining the temperature measurement points, a temperature measurement location that matches the liquid level in the tank can be identified. This effectively offsets the reduced accuracy caused by laying cable-type temperature sensors at fixed intervals, thereby ensuring improved measurement accuracy of the mixing zone thickness in the energy storage tank.

[0045] An energy storage tank is a container that uses water as a medium to store and release energy. The tank is a vertical cylindrical container with a non-contact radar level gauge installed at the center of the top to detect the liquid level. The top and bottom are respectively equipped with an inlet and an outlet. The inlet is connected to the top of the tank via a water distributor, and the outlet is connected to the bottom of the tank via a water distributor. The water distributor consists of several equally spaced channels to ensure a stable water flow rate and reduce fluid momentum during water inflow and outflow. An NTC thermistor temperature sensor is installed along the central axis of the tank via a steel wire rope as a temperature measurement point. Flow sensors are also installed at the inlet and outlet to adjust the flow sensor settings according to different operating conditions of the energy storage tank.

[0046] Reference Figure 3 The steps for analyzing the operating information of the energy storage tank to determine the temperature recording period include: Step S300: Determine whether the energy storage tank's operating condition information is the preset cold storage operating condition information or the preset cold release operating condition information.

[0047] Among them, the cold storage condition information refers to the information on the current cold storage working state of the energy storage tank, which is stored by the operator in the processing terminal.

[0048] Cooling status information refers to the information on the current cooling status of the energy storage tank, which is stored by the operator in the processing terminal.

[0049] By determining whether the energy storage tank's operating condition information is cold storage or cold release, the current energy storage condition of the energy storage tank can be determined. Then, different temperature acquisition cycles can be determined based on different energy storage tank operating condition information to adapt to temperature changes under different operating conditions, thereby ensuring the effect of improving the measurement accuracy of the mixing zone thickness of the energy storage tank.

[0050] Step S3001: If it is cold storage operating condition information, then the preset cold storage detection cycle is defined as the temperature recording cycle.

[0051] If the information is about cold storage conditions, it means that the energy storage tank is currently in the cold storage working state. The processing terminal directly defines the cold storage detection cycle as the temperature recording cycle. At this time, cold water is injected from the bottom of the energy storage tank. Since the density of cold water is greater than that of hot water, the cold water sinks to the bottom, while the water in the energy storage tank that is at a higher temperature than the currently injected cold water floats on top. The temperature change is smooth and there are no drastic fluctuations during this process. Therefore, the cold storage detection cycle is set to 1 minute in this step.

[0052] The cold storage detection cycle refers to the temperature acquisition cycle of the energy storage tank during cold storage operation, which is set in advance by the operator. By determining the cold storage detection cycle, different temperature acquisition cycles can be determined according to different operating conditions of the energy storage tank, thereby ensuring the improvement of the measurement accuracy of the mixing zone thickness of the energy storage tank.

[0053] Step S3002: If it is cooling condition information, then the preset cooling detection cycle is defined as the temperature recording cycle.

[0054] If the information is about cooling conditions, it means that the energy storage tank is currently in a cooling state. The processing terminal directly defines the cooling detection cycle as the temperature recording cycle. At this time, hot water enters from the top and cold water exits from the bottom. The temperature change is steeper in this process and the temperature change is easily disturbed by the hot and cold water. Therefore, the cooling detection cycle is set to 1 second in this step.

[0055] The cooling detection cycle refers to the temperature acquisition cycle during the cooling operation of the energy storage tank, which is preset by the operator. By determining the cooling detection cycle, different temperature acquisition cycles can be determined according to different operating conditions of the energy storage tank, thereby ensuring the improvement of the measurement accuracy of the mixing zone thickness of the energy storage tank.

[0056] Reference Figure 4 The steps for analyzing the operating parameters of the energy storage tank to determine the sampling temperature value include: Step S400: Determine the initial energy storage temperature and the final energy storage temperature based on the operating parameters of the energy storage tank.

[0057] Among them, the initial energy storage temperature refers to the temperature of the water in the energy storage tank at the start of energy storage operation, which is identified and retrieved by the processing terminal from the energy storage tank's operating parameters.

[0058] The final energy storage temperature refers to the temperature of the water injected into the energy storage tank, which is identified and retrieved by the processing terminal from the operating parameters of the energy storage tank.

[0059] By identifying and calling the initial and final temperatures of energy storage, the temperature difference of the water before and after energy storage can be determined, so as to determine the trigger temperature for time sampling and thus provide data support for determining the sampling temperature value.

[0060] Step S401: Calculate the absolute value of the difference between the final energy storage temperature and the initial energy storage temperature to generate the energy storage temperature difference value.

[0061] The energy storage temperature difference refers to the temperature deviation of the water in the energy storage tank before and after energy storage. It is obtained by calculating the absolute value of the difference between the final energy storage temperature and the initial energy storage temperature at the processing terminal. By determining the energy storage temperature difference, the temperature deviation of the water in the energy storage tank before and after energy storage can be determined, which facilitates the subsequent determination of the sampling temperature change value.

[0062] Step S402: Analyze the initial energy storage temperature, the final energy storage temperature, and the energy storage temperature difference to determine the sampling temperature value.

[0063] After the processing terminal determines the energy storage temperature difference, it analyzes the initial energy storage temperature, the final energy storage temperature, and the energy storage temperature difference to determine the sampling temperature value. The specific method is described in [reference needed]. Figure 5 The steps are to determine the time when the temperature at the temperature measurement point reaches the required sampling temperature value, thereby providing data support for the subsequent determination of the average thickness of the mixed water zone.

[0064] Reference Figure 5 The steps for analyzing the initial energy storage temperature, the final energy storage temperature, and the temperature difference to determine the sampling temperature value include: Step S500: Calculate the product of the energy storage temperature difference and the preset temperature ratio to generate the sampled temperature change value.

[0065] The sampling temperature change value refers to the value that measures the temperature offset at the boundary of the mixing zone, which is obtained by the processing terminal after calculating the product of the energy storage temperature difference and the temperature ratio. By determining the sampling temperature change value, the standard temperature difference between the hot water layer and the edge of the mixing zone, and between the cold water layer and the edge of the mixing zone, can be determined, thus providing data support for the subsequent determination of the initial and final sampling temperature values.

[0066] Temperature ratio refers to the standard boundary judgment threshold in water storage cooling operation, which is set in advance by the operator. In this step, the temperature ratio is set to 15%. Based on the energy storage temperature difference, 15% is added upwards from the cold water temperature and 15% is subtracted downwards from the hot water temperature. The two temperature points obtained correspond to the intervals with the most drastic temperature changes in the mixed water zone, so as to facilitate the subsequent determination of the initial sampling temperature value and the final sampling temperature value.

[0067] Step S501: Analyze the changes in the initial energy storage temperature and the sampling temperature to determine the initial sampling temperature value.

[0068] The initial sampling temperature value refers to the temperature value when the time is first sampled. It is obtained by the processing terminal after analyzing the initial energy storage temperature and the change in the sampling temperature. For example, if the energy storage tank is currently in cold storage mode, as the cold storage mode progresses, cold water is continuously injected into the energy storage tank, and the temperature value at the temperature measurement point begins to change from high to low. At this time, the initial sampling temperature value is obtained by calculating the difference between the initial energy storage temperature and the change in the sampling temperature. Where the initial energy storage temperature is 14 degrees Celsius and the final energy storage temperature is 4 degrees Celsius, then the energy storage temperature difference is 10 degrees Celsius. The temperature ratio is consistent with the temperature ratio in step S500, which is 15%. Therefore, the initial sampling temperature value can be expressed as: If the energy storage tank is currently in cooling mode, as the cooling process continues, hot water is continuously injected into the tank, and the temperature at the measurement point begins to change from low to high. At this point, the initial sampling temperature is obtained by calculating the sum of the initial energy storage temperature and the change in the sampling temperature. The initial energy storage temperature is 4 degrees Celsius, and the final energy storage temperature is 14 degrees Celsius. Therefore, the energy storage temperature difference is 10 degrees Celsius. The temperature ratio is consistent with the temperature ratio in step S500, and is set to 15%. The initial sampling temperature value can then be expressed as: By determining the initial sampling temperature value, the temperature trigger condition for sampling time can be determined, which facilitates the subsequent determination of the sampling temperature value.

[0069] Step S502: Analyze the changes in the final energy storage temperature and the sampling temperature to determine the final sampling temperature value.

[0070] The final sampled temperature value refers to the temperature value at the time of the last time the time was sampled. It is obtained by the processing terminal after analyzing the final energy storage temperature and the change in the sampled temperature. For example, if the energy storage tank is currently in cold storage mode, as the cold storage mode progresses, cold water is continuously injected into the energy storage tank, and the temperature value at the temperature measurement point begins to change from high to low. At this time, the final sampled temperature value is obtained by calculating the sum of the final energy storage temperature and the change in the sampled temperature. Where the initial energy storage temperature is 14 degrees Celsius and the final energy storage temperature is 4 degrees Celsius, then the energy storage temperature difference is 10 degrees Celsius. The temperature ratio is consistent with the temperature ratio in step S500, which is 15%. The final sampled temperature value can then be expressed as follows: If the energy storage tank is currently in cooling mode, as the cooling process continues, hot water is continuously injected into the tank, and the temperature at the measurement point begins to change from low to high. At this point, the final sampled temperature value is obtained by calculating the difference between the final energy storage temperature and the change in the sampled temperature. The initial energy storage temperature is 4 degrees Celsius, and the final energy storage temperature is 14 degrees Celsius. Therefore, the energy storage temperature difference is 10 degrees Celsius. The temperature ratio is consistent with the temperature ratio in step S500, and is set to 15%. The final sampled temperature value can then be expressed as... By determining the final sampling temperature value, the temperature trigger condition for sampling time can be determined, which facilitates the subsequent determination of the sampling temperature value.

[0071] Step S503: Associate the initial sampling temperature value and the final sampling temperature value to generate a sampling temperature value.

[0072] After determining the final sampling temperature value, the processing terminal associates the initial sampling temperature value and the final sampling temperature value to generate a sampling temperature value, thereby determining the temperature triggering condition when sampling time, and thus providing data support for the subsequent determination of the average thickness of the mixed water zone.

[0073] Reference Figure 6 The steps for determining the average thickness of the mixing zone by analyzing the operating parameters of the energy storage tank, temperature measurement points, temperature recording period, and sampling temperature values ​​include: Step S600: Obtain the temperature value of the temperature measurement point according to the temperature recording period.

[0074] The temperature value at the measurement point refers to the temperature value at that point, obtained by the processing terminal controlling the NTC thermistor temperature sensor to detect the temperature at the measurement point according to the temperature recording period. By determining the temperature value at the measurement point, it is determined whether the temperature at the measurement point meets the requirements for time sampling, thus providing data support for subsequently determining the current sampling time.

[0075] However, the water distributor in the energy storage tank cannot achieve completely uniform water distribution; the water pressure at the outlet closer to the inlet pipe is slightly higher than that at the outlet further away. On the same horizontal cross-section of the energy storage tank, the temperature front is not a perfectly horizontal plane, but rather a wave-like surface with slight fluctuations. For example, if the energy storage tank is operating in a cold storage mode, cold water enters from the bottom water distributor. The temperature at the location directly above the distributor outlet drops first, while the temperature between the two outlets drops the slowest. Therefore, on the same horizontal cross-section, two NTC thermistor temperature sensors are laterally extended from the existing temperature measurement point, located at points within the radius of the energy storage tank. place and When detecting whether the temperature value at the measurement point is consistent with the sampling temperature value, the acquisition time operation is only started when the arithmetic mean of the three NTC thermistor temperature sensors on the same horizontal cross section is consistent with the sampling temperature value. This effectively eliminates the detection error caused by uneven temperature, thereby ensuring the effect of improving the measurement accuracy of the thickness of the mixed water zone in the energy storage tank.

[0076] Step S601: Analyze the temperature values ​​at the measurement points and the sampling temperature values ​​to determine the current sampling time.

[0077] The current sampling time refers to the moment when the temperature at the temperature measurement point reaches the sampling temperature value. This is obtained by the processing terminal after analyzing the temperature value at the measurement point and the sampling temperature value. For specific methods, please refer to [link / reference needed]. Figure 7 The steps are as follows. According to step S503, the sampled temperature value includes the initial sampled temperature value and the final sampled temperature value. Therefore, the current sampling time in this step includes two values, corresponding to the times when the temperature measurement point reaches the initial and final sampled temperature values, respectively. By determining the current sampling time, the time it takes for the mixed water zone to completely pass through the same temperature measurement point is determined, thus providing data support for subsequently determining the sampling time difference.

[0078] Step S602: Calculate the difference at the current sampling time to generate the sampling time difference.

[0079] The sampling time difference refers to the time it takes for the temperature at the temperature measurement point to rise from the initial energy storage temperature to the final energy storage temperature. It is obtained by calculating the difference between the current sampling time by the processing terminal. By determining the sampling time difference, the time it takes for the mixed water zone to completely pass through the same temperature measurement point can be determined, thus providing data support for subsequently determining the thickness of the mixed water zone at the measurement point.

[0080] Step S603: Analyze the sampling time difference and the operating parameters of the energy storage tank to determine the average thickness of the mixing zone.

[0081] After determining the sampling time difference at the processing terminal, the terminal analyzes the sampling time difference and the operating parameters of the energy storage tank to determine the average thickness of the mixing zone. The specific method is described in [reference needed]. Figure 8 The steps are followed to accurately obtain the thickness of the mixing zone in the energy storage tank, thereby ensuring the effect of improving the measurement accuracy of the mixing zone thickness in the energy storage tank.

[0082] Reference Figure 7 The steps for analyzing the temperature values ​​at the measurement points and the sampling temperatures to determine the current sampling time include: Step S700: Determine whether the temperature value at the measurement point meets the preset sampling temperature value requirement.

[0083] The requirement for the sampling temperature value is that it must match the value of the sampling temperature value, which is preset by the operator. By determining whether the temperature value at the measurement point matches the value of the sampling temperature value, it is determined whether the time acquisition operation should be triggered at the current moment, so as to determine the current sampling time later.

[0084] Step S7001: If it does not meet the requirements, continue to obtain the temperature value of the measurement point for cyclic judgment.

[0085] If the temperature value at the measurement point is inconsistent with the temperature value at the sampling point, it means that the temperature at the current temperature measurement point has not reached the temperature threshold for time acquisition. At this time, the processing terminal continues to acquire the temperature value at the measurement point for loop judgment in order to determine the current sampling time later.

[0086] Step S7002: If the conditions are met, obtain the current sampling time.

[0087] If the temperature value at the measurement point matches the temperature value at the sampling point, it means that the temperature at the current temperature measurement point has reached the temperature threshold for time acquisition. At this time, the processing terminal obtains the current sampling time, thereby determining the time taken for the temperature measurement point to go from the initial energy storage temperature to the final energy storage temperature, and thus providing data support for the subsequent determination of the average thickness of the mixing zone.

[0088] Reference Figure 8 The steps for determining the average thickness of the mixing zone by analyzing the sampling time difference and the operating parameters of the energy storage tank include: Step S801: Determine the flow rate and cross-sectional area of ​​the energy storage tank based on its operating parameters.

[0089] The energy storage tank flow rate refers to the volumetric flow rate of energy stored per unit time, which is identified and retrieved by the processing terminal from the energy storage tank's operating parameters. The energy storage tank flow rate is strongly correlated with the average flow velocity of the tank's cross-section. Under the condition that the cross-sectional area of ​​the energy storage tank remains constant, a larger energy storage tank flow rate indicates a larger flow rate passing through the tank's cross-section per unit time, and therefore a larger average flow velocity of the tank's cross-section.

[0090] The cross-sectional area of ​​the energy storage tank refers to the area of ​​the tank's cross-section, which is identified and retrieved by the processing terminal from the tank's operating parameters. The cross-sectional area of ​​the energy storage tank is strongly correlated with the average flow velocity across the tank's cross-section. A larger cross-sectional area indicates a smaller average speed of cold water moving vertically along the tank, resulting in a lower average flow velocity across the tank's cross-section. This provides data support for subsequently determining the average flow velocity across the tank's cross-section.

[0091] Step S801: Calculate the quotient of the energy storage tank flow rate and the energy storage tank cross-sectional area to generate the average flow velocity of the tank cross-section.

[0092] The average flow velocity across the tank cross-section refers to the average speed at which cold water moves vertically along the energy storage tank. It is obtained by calculating the energy storage tank flow rate and the cross-sectional area of ​​the energy storage tank from the treatment terminal. For example, if the energy storage tank is currently in cold storage operation, and the flow rate at one temperature measurement point is... Cross-sectional area of ​​energy storage tank Then the average flow velocity across the tank cross-section is By determining the average flow velocity across the tank cross-section, it can be determined that, under the condition that the cross-sectional area of ​​the energy storage tank remains constant, a larger flow rate in the energy storage tank indicates a greater average moving speed of the cold water along the vertical direction of the tank. Therefore, a larger average flow velocity across the tank cross-section provides data support for subsequently determining the thickness of the mixing zone at the measuring point.

[0093] Step S802: Calculate the product of the average flow velocity of the tank cross section and the sampling time difference to generate the thickness of the mixed water zone at the measuring point.

[0094] The thickness of the mixing zone at the measuring point refers to the thickness of the mixing zone at the temperature measuring point, which is obtained by calculating the product of the average flow velocity of the tank cross-section and the sampling time difference from the processing terminal. For example, if the energy storage tank is currently in cold storage operation, the average flow velocity of the tank cross-section at one of the temperature measuring points... Sampling time difference Then the thickness of the mixed water zone at the measuring point is By determining the thickness of the mixing zone at each measuring point, the average thickness of the mixing zone at all temperature measuring points in the energy storage tank can be determined. This provides data support for subsequently determining the average thickness of the mixing zone, thereby ensuring the improvement of the measurement accuracy of the mixing zone thickness in the energy storage tank.

[0095] Step S803: Calculate the average thickness of the mixed water zone at the measuring point to generate the average thickness of the mixed water zone.

[0096] In this process, after determining the thickness of the mixing zone at the measuring point, the processing terminal calculates the average thickness of the mixing zone at the measuring point to obtain the average thickness of the mixing zone. This effectively offsets the impact of the difference in the thickness of the mixing zone at different heights, thereby improving the measurement accuracy of the mixing zone thickness of the energy storage tank.

[0097] Based on the same inventive concept, embodiments of this application provide a method for testing the thickness of the temperature stratification mixing zone in an energy storage water tank, including: The acquisition module is used to acquire the tank liquid level height, energy storage tank operating condition information, energy storage tank working parameters, and measurement point temperature values; A memory for storing a program for testing the thickness of the temperature stratification mixing zone in an energy storage tank; The processor and memory can load and execute programs to implement a method for testing the thickness of the temperature stratification mixing zone in an energy storage tank.

[0098] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device, and unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0099] This application provides a computer-readable storage medium storing a computer program that can be loaded by a processor and executed as a method for testing the thickness of the temperature stratification mixing zone in an energy storage tank.

[0100] Computer storage media include, for example, USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, optical disks, and other media that can store program code.

[0101] Based on the same inventive concept, this application provides a smart terminal, including a memory and a processor. The memory stores a computer program that can be loaded and executed by the processor to test the thickness of the temperature stratification mixing zone in an energy storage water tank.

[0102] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device, and unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0103] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Any feature disclosed in this specification (including the abstract and drawings) may be replaced by other equivalent or similar features unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is only one example of a series of equivalent or similar features.

Claims

1. A method for testing the thickness of the temperature stratification mixing zone in an energy storage water tank, characterized in that, include: Obtain the tank liquid level, energy storage tank operating status information, and energy storage tank operating parameters; The temperature measurement points are determined based on the liquid level in the tank and the number of preset measurement points. Analyze the operating information of the energy storage tank to determine the temperature recording cycle; The operating parameters of the energy storage tank were analyzed to determine the sampling temperature value; The operating parameters, temperature measurement points, temperature recording cycle, and sampling temperature values ​​of the energy storage tank were analyzed to determine the average thickness of the mixing zone.

2. The method for testing the thickness of the temperature stratification mixing zone in an energy storage water tank according to claim 1, characterized in that, The steps for determining temperature measurement points based on the tank liquid level and the preset number of measurement points include: Calculate the sum of the number of measuring points and the preset number of benchmark compensations to generate the number of measuring point segments; Calculate the quotient of the tank liquid level height and the number of measuring point segments to generate the height difference of the measuring points; The temperature measurement points of the preset energy storage tank are determined based on the height difference between the measurement points.

3. The method for testing the thickness of the temperature stratification mixing zone in an energy storage water tank according to claim 1, characterized in that, The steps for analyzing the operating information of the energy storage tank to determine the temperature recording period include: Determine whether the energy storage tank's operating condition information is the preset cold storage operating condition information or the preset cold release operating condition information; If it is information about cold storage conditions, then the preset cold storage detection cycle is defined as the temperature recording cycle; If it is cooling operation information, then the preset cooling detection cycle is defined as the temperature recording cycle.

4. The method for testing the thickness of the temperature stratification mixing zone in an energy storage water tank according to claim 1, characterized in that, The steps for analyzing the operating parameters of the energy storage tank to determine the sampling temperature value include: Determine the initial and final energy storage temperatures based on the operating parameters of the energy storage tank. Calculate the absolute value of the difference between the final energy storage temperature and the initial energy storage temperature to generate the energy storage temperature difference value; The initial energy storage temperature, the final energy storage temperature, and the energy storage temperature difference are analyzed to determine the sampling temperature value.

5. The method for testing the thickness of the temperature stratification mixing zone in an energy storage water tank according to claim 4, characterized in that, The steps for analyzing the initial energy storage temperature, the final energy storage temperature, and the energy storage temperature difference to determine the sampling temperature value include: Calculate the product of the energy storage temperature difference and the preset temperature ratio to generate the sampled temperature change value; The changes in the initial energy storage temperature and the sampling temperature were analyzed to determine the initial sampling temperature. The changes in the final energy storage temperature and the sampling temperature are analyzed to determine the final sampling temperature value. Associate the initial and final sampled temperature values ​​to generate the sampled temperature value.

6. The method for testing the thickness of the temperature stratification mixing zone in an energy storage water tank according to claim 1, characterized in that, The steps for analyzing the operating parameters of the energy storage tank, temperature measurement points, temperature recording period, and sampling temperature values ​​to determine the average thickness of the mixing zone include: The temperature value of the temperature measurement point is obtained according to the temperature recording period; Analyze the temperature values ​​at the measurement points and the sampling temperatures to determine the current sampling time; Calculate the difference between the current sampling times to generate the sampling time difference; The sampling time difference and the operating parameters of the energy storage tank were analyzed to determine the average thickness of the mixing zone.

7. The method for testing the thickness of the temperature stratification mixing zone in an energy storage water tank according to claim 6, characterized in that, The steps to analyze the temperature values ​​at the measurement points and the sampling temperatures to determine the current sampling time include: Determine whether the temperature value at the measurement point meets the preset sampling temperature requirement; If it does not meet the requirements, continue to obtain the temperature value of the measurement point and perform a loop judgment; If the conditions are met, the current sampling time is obtained.

8. The method for testing the thickness of the temperature stratification mixing zone in an energy storage water tank according to claim 6, characterized in that, The steps for analyzing the sampling time difference and the operating parameters of the energy storage tank to determine the average thickness of the mixing zone include: Determine the flow rate and cross-sectional area of ​​the energy storage tank based on its operating parameters; Calculate the quotient of the energy storage tank flow rate and the energy storage tank cross-sectional area to generate the average flow velocity of the tank cross-section; Calculate the product of the average flow velocity at the tank cross-section and the sampling time difference to generate the thickness of the mixed zone at the measuring point; Calculate the average thickness of the muddy zone at each measuring point to generate the average thickness of the muddy zone.

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