Hydrogen metering system and method for marine transportation
By installing multiple liquid level sensors, pressure sensors, and temperature sensors on liquid hydrogen transport ships, the distribution and density of liquid hydrogen can be monitored in real time, solving the problems of insufficient metering range and large measurement errors in large liquid hydrogen transport ships, and achieving high-precision liquid hydrogen metering.
Patent Information
- Application Number
- CN202511793097.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-01
- Publication Date
- 2026-01-20
AI Technical Summary
In the existing technology, the flow measurement range of liquid hydrogen transport ships is limited, which is difficult to adapt to the measurement requirements of large liquid hydrogen transport ships. Furthermore, the measurement error is relatively large due to factors such as changes in the flow state and environmental heat intrusion during the loading and unloading process of liquid hydrogen.
Multiple first liquid level sensors are distributed along an axis perpendicular to the horizontal plane inside the storage tank. Combined with pressure and temperature sensors, the distribution and density of liquid hydrogen are monitored in real time, and the measurement accuracy is improved by calculating the mass of liquid hydrogen.
This technology enables real-time and accurate monitoring of the remaining amount of liquid hydrogen during transportation, reducing measurement errors and improving metering accuracy.
Smart Images
Figure CN121363712A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of liquid hydrogen metering, in particular to a hydrogen metering system and method for offshore transportation. BACKGROUND
[0002] Hydrogen energy, as a clean and efficient energy carrier, plays a key role in the process of energy transformation. In different countries and regions, there is a big difference in the production cost of hydrogen. How to realize large-scale cross-border transportation of hydrogen has become an urgent need. Therefore, large-scale liquid hydrogen transport ships have become a key link in the process of liquid hydrogen transportation. After the large-scale liquid hydrogen transport ship docks, it often needs to complete the discharge or filling of liquid hydrogen in the liquid hydrogen storage tank within a few hours, and measure the remaining amount of liquid hydrogen in the storage tank in real time. Since the liquid hydrogen storage capacity of large-scale liquid hydrogen transport ships is as high as tens of thousands of cubic meters, the range of the flow meter (such as a rotor flow meter) in the prior art is limited, which is difficult to adapt to the metering demand of liquid hydrogen in large-scale liquid hydrogen transport ships. And liquid hydrogen may vaporize due to changes in flow state, environmental heat intrusion and other factors during loading and unloading, forming gas-liquid two-phase flow, resulting in large measurement error of the flow meter and reducing the accuracy of the measurement result.
[0003] Therefore, there is an urgent need to develop a new technical solution to solve the above technical problems. SUMMARY
[0004] The present application provides a hydrogen metering system and method for offshore transportation, which can improve the accuracy of the measurement result.
[0005] In a first aspect, the present application provides a hydrogen metering system for offshore transportation, comprising: a spherical storage tank arranged on a transport ship for storing hydrogen to be transported; a plurality of first liquid level sensors arranged in the storage tank and sequentially distributed along an axis in the storage tank perpendicular to the horizontal plane, the sum of the ranges of the plurality of first liquid level sensors being greater than the liquid level height of the storage tank; at least two second liquid level sensors arranged around the first liquid level sensors, the second liquid level sensors being parallel to the axis; a pressure sensor arranged at the top of the storage tank for detecting the pressure of hydrogen in the storage tank; a plurality of temperature sensors sequentially arranged at different heights on the axis for detecting the temperature of hydrogen at different heights in the storage tank.
[0006] In a second aspect, the present application provides a hydrogen metering method for offshore transportation, applied to the system of the first aspect of the present application, the method comprising: During the hydrogen discharge or refilling process, the distribution of liquid hydrogen and gaseous hydrogen in the storage tank is obtained based on the real-time hydrogen level height collected by the first liquid level sensor. Based on the hydrogen pressure inside the storage tank collected by the pressure sensor and the hydrogen temperature at different heights inside the storage tank collected by the temperature sensor, the hydrogen density at different heights inside the storage tank is obtained. Based on the distribution of gaseous and liquid hydrogen in the storage tank and their density at different heights, the mass of hydrogen in the storage tank is obtained for real-time measurement during hydrogen discharge or filling.
[0007] This invention provides a hydrogen metering system and method for maritime transportation. By uniformly distributing multiple first liquid level sensors along an axis perpendicular to the horizontal plane within a storage tank, the sum of the sensor ranges covers the entire measurement range of the tank, meeting the metering requirements for hydrogen during large-scale transportation. The pressure and density distribution of hydrogen within the tank are obtained based on data collected by pressure and temperature sensors. The mass of hydrogen within the tank is then calculated based on the liquid level height measured by the first liquid level sensors. This ensures that the measurement results are unaffected by changes in the hydrogen's state within the tank, improving the accuracy of the measurement. Attached Figure Description
[0008] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0009] Figure 1 This is a schematic diagram showing the position of a liquid level sensor in a hydrogen metering system for maritime transportation, provided by an embodiment of the present invention. Figure 2 It is based on Figure 1 A schematic diagram of a hydrogen metering system for maritime transport, shown from a top view. Figure 3 It is based on Figure 1 This diagram shows the locations of temperature and pressure sensors within a hydrogen metering system used for maritime transport.
[0010] Figure label: 1-Storage tank; 2-First liquid level sensor; 3-Second liquid level sensor; 4-Temperature sensor; 5-Pressure sensor. Detailed Implementation
[0011] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.
[0012] Please refer to Figures 1-3 The embodiments of the present application provide a hydrogen metering system for marine transportation, comprising: A spherical storage tank 1 is arranged on a transport ship and used for storing hydrogen to be transported; A plurality of first liquid level sensors 2 are arranged in the storage tank 1 and sequentially distributed along an axis in the storage tank 1 which is perpendicular to a horizontal plane, and the sum of the ranges of the plurality of first liquid level sensors 2 is greater than a liquid level measurement interval of the storage tank 1; At least two second liquid level sensors 3 are arranged around the first liquid level sensors 2, and the second liquid level sensors 3 are parallel to the axis; A pressure sensor 5 is arranged at the top of the storage tank 1 and used for detecting the pressure of hydrogen in the storage tank 1; A plurality of temperature sensors 4 are sequentially arranged at different height positions on the axis and used for detecting the temperature of hydrogen at different height positions in the storage tank 1.
[0013] In the embodiment of the present application, the liquid level height of the liquid hydrogen in the storage tank 1 is obtained by the first liquid level sensor 2, and then the remaining amount of the liquid hydrogen and the gaseous hydrogen in the storage tank 1 (usually downward, the gaseous hydrogen is filled in the gaseous space above the liquid hydrogen in the storage tank 1) is calculated. The number of the first liquid level sensor 2 is multiple, which is distributed on the axis perpendicular to the horizontal plane in the storage tank 1, fixed in the storage tank 1 by the support, respectively monitors the liquid level in the storage tank 1 at different heights, and the sum of the range of the multiple first liquid level sensors 2 can cover the liquid level height measurement interval of the storage tank 1. Since the density of the liquid hydrogen will change with the change of the temperature and the pressure, the pressure sensor 5 and the temperature sensor 4 are arranged in the storage tank 1 in the embodiment of the present application, the temperature sensor 4 is uniformly distributed at different height positions of the axis, and the pressure sensor 5 is arranged in the gaseous space at the top of the storage tank 1. The pressure in the storage tank 1 and the temperature distribution at different heights are monitored by the temperature sensor 4 and the pressure sensor 5, so as to calculate the density distribution of the liquid hydrogen and the gaseous hydrogen in the storage tank 1, and obtain the mass of the liquid hydrogen and the gaseous hydrogen in the storage tank 1 according to the density distribution and the liquid level height of the liquid hydrogen, which is used to more accurately measure the remaining hydrogen in the storage tank 1. Usually, the liquid hydrogen in the storage tank 1 needs to be monitored in real time during the process of filling and discharging the liquid hydrogen after the transport ship docks. Before filling and discharging the liquid hydrogen, the second liquid level sensor 3 arranged around the first liquid level sensor 2 is used to monitor the liquid level height at other positions in the storage tank 1, and compared with the liquid level height collected by the first liquid level sensor 2, so as to determine whether the current environment of the storage tank 1 exists surge, if the surge exists, the filling and discharging of the liquid hydrogen is not suitable.
[0014] Specifically, when the storage tank 1 is filled with liquid hydrogen and discharged with liquid hydrogen after the transport ship docks, the process of measuring and monitoring the hydrogen remaining in the storage tank 1 by the hydrogen metering system is as follows: the first liquid level sensor 2 and the second liquid level sensor 3 respectively collect the liquid level height of the liquid hydrogen at different positions in the storage tank 1. If the difference between the liquid level heights at different positions is greater than the preset difference threshold, and the difference presents periodic changes, it is determined that there is a surge in the storage tank 1, and at this time it is not suitable to carry out the filling and discharge of liquid hydrogen. If the liquid level heights collected by the first liquid level sensor 2 and the second liquid level sensor 3 are basically consistent, and the values do not change dramatically, the filling or discharge process of liquid hydrogen is started. The real-time temperature distribution of the liquid hydrogen and the gaseous hydrogen in the storage tank 1 is monitored by the temperature sensor 4, and the pressure of the gaseous hydrogen and the liquid hydrogen in the storage tank 1 is monitored by the pressure sensor 5 (usually, the pressure of the gaseous hydrogen and the liquid hydrogen is equal, and the value collected by the pressure sensor 5 is the value). Based on the temperature distribution and the pressure, the real-time density distribution of the liquid hydrogen and the gaseous hydrogen in the storage tank 1 is obtained. The liquid level height of the liquid hydrogen in the storage tank 1 is collected by the first liquid level sensor 2 in real time, and the distribution state of the liquid hydrogen and the gaseous hydrogen in the storage tank 1 is obtained (usually, the gaseous space above the liquid hydrogen in the storage tank 1 is the distribution space of the gaseous hydrogen, that is, the sum of the volume of the liquid hydrogen and the volume of the gaseous hydrogen in the storage tank 1 is the volume of the storage tank 1). The liquid level height monitored by the first liquid level sensor 2 can also be corrected by the inclination sensor on the transport ship: the inclination sensor collects the current inclination angle of the transport ship, and the liquid level height collected by the first liquid level sensor 2 is corrected according to the inclination angle. Based on the density distribution of the gaseous hydrogen and the liquid hydrogen in the storage tank 1 and the distribution state of the liquid hydrogen and the gaseous hydrogen, the mass of the hydrogen (including the gaseous hydrogen and the liquid hydrogen) remaining in the storage tank 1 can be calculated, which can more accurately reflect the actual remaining amount of hydrogen in the storage tank 1. In addition, by the change of the mass of the hydrogen in the storage tank 1, the mass flow of the liquid hydrogen during the filling or discharge process can also be calculated. After the filling or discharge process of the liquid hydrogen is completed, the above-mentioned collection of the liquid level height, temperature and pressure data in the storage tank 1 by the first liquid level sensor 2, the temperature sensor 4 and the pressure sensor 5 is repeated, so as to calculate the remaining amount of hydrogen in the storage tank 1, which is used for the review process of the remaining amount of liquid hydrogen and gaseous hydrogen in the storage tank 1, and the recorded liquid hydrogen filling amount or liquid hydrogen discharge amount during the filling or discharge process is corrected according to the result obtained by the review process, so as to ensure the accuracy of the liquid hydrogen metering.
[0015] In an embodiment of the present application, the range of each first liquid level sensor 2 is L constrained by the following formula: wherein, l = L / R represents the equivalent range of the first liquid level sensor, R is the radius of the storage tank, δa ratio of a measurement error of the liquid hydrogen remaining in the tank to a volume of the tank, η a ratio of a measurement error of the first liquid level sensor to a range.
[0016] In the embodiment, the ranges and models of each first liquid level sensor 2 are the same, facilitating unified calibration and maintenance. The range of each first liquid level sensor 2 is constrained by the formula, which can ensure the real-time measurement accuracy of the liquid hydrogen. It can be understood that in the formula, the measurement error of the liquid hydrogen remaining in the tank, the volume of the tank, and the measurement error of the first liquid level sensor are all preset values.
[0017] In an embodiment of the present application, the angle between the first liquid level sensor 2 and the horizontal plane increases from the midpoint of the axis to both ends of the axis, the corresponding angle of the first liquid level sensor 2 at the midpoint of the axis is greater than 0°, and the corresponding angles of the two first liquid level sensors 2 at both ends of the axis are 90°.
[0018] In the embodiment, the horizontal cross-sectional area of the spherical tank 1 changes along the height direction (the direction perpendicular to the horizontal plane), showing a shape of being thinner at the top and bottom and thicker in the middle. When the liquid level sensor collects the liquid level height, due to the existence of the measurement error, the same liquid level height deviation will produce a larger excess measurement deviation in the thicker middle part of the spherical tank 1, thereby affecting the real-time excess measurement accuracy of the liquid volume. Therefore, the middle part of the spherical tank 1 often requires higher measurement accuracy of the liquid level sensor. In the embodiment of the present application, the tank 1 is divided into several liquid level sensor measurement areas according to the height, and a separate capacitive liquid level sensor (first liquid level sensor 2) is arranged in each area. The first liquid level sensors 2 at both ends are arranged perpendicular to the horizontal plane, and the first liquid level sensors 2 at other positions are arranged obliquely, and there is a certain angle between the first liquid level sensors 2 and the horizontal plane. In this way, the obliquely arranged first liquid level sensors 2 improve the liquid level measurement accuracy by reducing the measurement range. Therefore, the angle between the first liquid level sensor 2 and the horizontal plane increases from the midpoint of the axis to both ends of the axis, and the corresponding angle of the first liquid level sensor 2 at the midpoint of the axis is the smallest, but greater than 0°.
[0019] In an embodiment of the present application, the angle between the first liquid level sensor 2 and the horizontal plane θ is constrained by the following formula: wherein, h = H / R represents the equivalent initial measurement liquid level of the first liquid level sensor, H represents the initial measurement liquid level height of the first liquid level sensor, R represents the radius of the tank, l = L / R represents the equivalent range of the first liquid level sensor, L represents the range of the first liquid level sensor, δ a ratio of a measurement error of the remaining liquid hydrogen in the tank to a volume of the tank, η a ratio of a measurement error of the first liquid level sensor to a range of the first liquid level sensor.
[0020] In the embodiment, the angles between the first liquid level sensors 2 and the horizontal plane increase from the midpoint of the axis to the two ends of the axis, and are constrained by the formula, the angles corresponding to the two first liquid level sensors 2 at the two ends of the axis are 90°. It can be understood that in the formula, the measurement error of the remaining liquid hydrogen in the tank, the volume of the tank, the radius of the tank and the measurement error of the first liquid level sensor are all preset values.
[0021] In an embodiment of the present application, when the number of the second liquid level sensors 3 is two, the first common perpendicular line segment and the second common perpendicular line segment between the straight line where the second liquid level sensors 3 are located and the axis are equal in length, the first common perpendicular line segment is parallel to the fore-aft direction of the transport ship, and the second common perpendicular line segment is parallel to the port-starboard direction of the transport ship.
[0022] In the embodiment, the second liquid level sensor 3 is a single sensor for detecting the liquid level height at other positions in the tank 1 and comparing with the liquid level height monitored by the first liquid level sensor 2 to determine whether there is a surge in the tank 1. It can be understood that the more the number of the second liquid level sensors 3, the more accurate the monitoring of the surge. If the number of the second liquid level sensors 3 is reduced considering the relatively high price of the liquid level sensor, the number of the second liquid level sensors 3 should be at least two. The two second liquid level sensors 3 are distributed around the axis where the first liquid level sensor 2 is located, and form a surge detection array with the first liquid level sensor 2, and the difference between the liquid level heights collected by the second liquid level sensor 3 and the first liquid level sensor 2 determines whether there is a surge in the tank 1. The first common perpendicular line segment and the second common perpendicular line segment between the straight line where the two second liquid level sensors 3 are located and the axis are equal in length, the first common perpendicular line segment is parallel to the fore-aft direction of the transport ship, and the second common perpendicular line segment is parallel to the port-starboard direction of the transport ship. The two second liquid level sensors 3 are used to monitor the surges in the fore-aft direction and the port-starboard direction of the transport ship respectively. The distance (first perpendicular line segment and second perpendicular line segment) between the second liquid level sensor 3 and the axis where the first liquid level sensor 2 is located is a preset value, so that when a surge occurs, the difference between the liquid level heights monitored by the first liquid level sensor 2 and the second liquid level sensor 3 is significant, and the presence of a surge can be accurately monitored. At the same time, the range of the second liquid level sensor 3 can cover the measurement interval of the first liquid level sensor 2 that measures the surge together with the second liquid level sensor 3.
[0023] In addition, the present application provides a hydrogen metering method for marine transportation, which is applied to the hydrogen metering system for marine transportation, and the method comprises the following steps: During the discharging or charging of hydrogen, based on the liquid level height of hydrogen in the storage tank collected by the first liquid level sensor in real time, the distribution state of the liquid hydrogen and the gaseous hydrogen in the storage tank is obtained; Based on the pressure of hydrogen in the storage tank collected by the pressure sensor and the temperature of hydrogen at different height positions in the storage tank collected by the temperature sensor, the density of hydrogen at different height positions in the storage tank is obtained; Based on the distribution state of the gaseous hydrogen and the liquid hydrogen in the storage tank and the density at different height positions, the mass of hydrogen in the storage tank is obtained, so as to realize real-time metering during the discharging or charging of hydrogen.
[0024] In an embodiment of the present application, the method further comprises: The liquid level height of hydrogen at different positions in the storage tank is collected by the first liquid level sensor and the second liquid level sensor respectively; If the difference between the liquid level heights at different positions is greater than a preset difference threshold, and the difference presents periodic variation, it is determined that there is a surge in the storage tank.
[0025] In an embodiment of the present application, the method further comprises: Based on the inclination sensor on the transport ship, the inclination angle of the storage tank relative to the horizontal plane is obtained; The liquid level height collected by the first liquid level sensor is corrected based on the inclination angle.
[0026] In an embodiment of the present application, the method further comprises: Based on the mass of hydrogen in the storage tank determined in real time, the mass flow of hydrogen during the discharging or charging is obtained.
[0027] In an embodiment of the present application, the method further comprises: After the discharging or charging of hydrogen is completed, based on the liquid level height of hydrogen in the storage tank collected by the first liquid level sensor, the distribution state of the liquid hydrogen and the gaseous hydrogen in the storage tank is obtained; Based on the pressure of hydrogen in the storage tank collected by the pressure sensor and the temperature of hydrogen at different height positions in the storage tank collected by the temperature sensor, the density of hydrogen at different height positions in the storage tank is obtained; Based on the distribution state of the gaseous hydrogen and the liquid hydrogen in the storage tank and the density at different height positions, the mass of the remaining hydrogen in the storage tank is obtained.
[0028] It can be understood that the method embodiment and the system embodiment provided by the present application are based on the same inventive concept, and both have the same beneficial effects, and the beneficial effects of the method embodiment will not be described here.
[0029] In summary, the hydrogen metering system and method for marine transportation provided by the embodiment of the present application can cover the measurement range of the storage tank by uniformly distributing the first liquid level sensors on the axis perpendicular to the horizontal plane in the storage tank, so as to meet the metering requirement of hydrogen in the large-scale transportation process. The pressure and density distribution of hydrogen in the storage tank is obtained based on the data collected by the pressure sensor and the temperature sensor, and then the mass of hydrogen in the storage tank is calculated according to the liquid level height measured by the first liquid level sensor, so that the measurement result is not affected by the state change of hydrogen in the storage tank, and the accuracy of the measurement result is improved. The first liquid level sensor is arranged obliquely, and the included angle between the first liquid level sensor and the horizontal plane increases from the midpoint of the axis to both ends, so that the closer to the midpoint of the axis, the greater the inclination of the first liquid level sensor, the smaller the measurement range, and the greater the measurement accuracy, so as to adapt to the situation that the horizontal cross section of the middle part of the spherical storage tank increases, and the requirement for the measurement accuracy also increases accordingly.
[0030] It should be noted that in the present application, the relational terms such as first and second are used only to differentiate one entity or operation from another, and do not necessarily require or imply that these entities or operations exist in any actual relationship or order. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or equipment.
[0031] Finally, it should be noted that the above description is only the preferred embodiment of the present application, which is only used to explain the technical scheme of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A hydrogen metering system for marine transportation, characterized in that, The system comprises: a spherical storage tank arranged on a transport ship for storing hydrogen to be transported; a plurality of first liquid level sensors arranged in the storage tank and sequentially distributed along an axis in the storage tank perpendicular to the horizontal plane, the sum of the ranges of the plurality of first liquid level sensors being greater than the liquid level height of the storage tank; at least two second liquid level sensors arranged around the first liquid level sensors, the second liquid level sensors being parallel to the axis; a pressure sensor arranged at the top of the storage tank in the storage tank for detecting the pressure of hydrogen in the storage tank; a plurality of temperature sensors sequentially arranged at different height positions on the axis for detecting the temperature of hydrogen at different height positions in the storage tank.
2. The system of claim 1, wherein, a range of each of the first liquid level sensors L Similarly, the range of the first liquid level sensors is constrained by the equation: wherein l = L / R represents an equivalent range of the first liquid level sensor, R is the radius of the tank, δ is the ratio of the measurement error of the liquid hydrogen remaining in the tank to the volume of the tank, η is the ratio of the measurement error of the first liquid level sensor to the range.
3. The system of claim 1, wherein, The angle between the first liquid level sensor and the horizontal plane increases from the midpoint of the axis to the two ends of the axis, the angle corresponding to the first liquid level sensor at the midpoint of the axis being greater than 0°, and the angles corresponding to the two first liquid level sensors at the two ends of the axis being 90°.
4. The system of claim 3, wherein, the angle between the first liquid level sensor and the horizontal plane θ the constraint is made by the following equation: wherein, h = H / R represents the equivalent starting gauged liquid level of the first liquid level sensor, H is the height of the starting gauged liquid level of the first liquid level sensor, R is the radius of the storage tank, l = L / R represents the equivalent range of the first liquid level sensor, L is the range of the first liquid level sensor , δ is the ratio of the gauging error of the liquid hydrogen remaining in the storage tank to the volume of the storage tank, η is the ratio of the gauging error to the range of the first liquid level sensor.
5. The system of claim 1, wherein, When the number of the second liquid level sensors is two, the first common perpendicular line segment and the second common perpendicular line segment between the straight line where the second liquid level sensors are located and the axis are equal in length, the first common perpendicular line segment being parallel to the bow-to-stern direction of the transport ship, and the second common perpendicular line segment being parallel to the port-to-starboard direction of the transport ship.
6. A method for hydrogen metering for marine transportation, characterized by, The method is applied to the system of any one of claims 1-5, and the method comprises: During the discharge or filling of hydrogen, based on the liquid level height of hydrogen in the storage tank collected by the first liquid level sensor in real time, the distribution state of liquid hydrogen and gaseous hydrogen in the storage tank is obtained; Based on the pressure of hydrogen in the storage tank collected by the pressure sensor and the temperature of hydrogen at different height positions in the storage tank collected by the temperature sensor, the density of hydrogen at different height positions in the storage tank is obtained; Based on the distribution state of gaseous hydrogen and liquid hydrogen in the storage tank and the density at different height positions, the mass of hydrogen in the storage tank is obtained for real-time metering during the discharge or filling of hydrogen.
7. The method of claim 6, wherein, Further comprising: The liquid level height of hydrogen at different positions in the storage tank is collected by the first liquid level sensor and the second liquid level sensor, respectively; If the difference between the liquid level heights at the different positions is greater than a preset difference threshold and the difference shows periodic variation, it is determined that there is a surge in the storage tank.
8. The method of claim 6, wherein, Further comprising: Based on the inclination sensor on the transport ship, the inclination angle of the storage tank relative to the horizontal plane is obtained; Based on the inclination angle, the liquid level height collected by the first liquid level sensor is corrected.
9. The method of claim 6, wherein, Further comprising: Based on the real-time determined mass of hydrogen in the storage tank, the mass flow of hydrogen during the discharge or filling is obtained.
10. The method of claim 6, wherein, Further comprising: After the discharge or filling of hydrogen is completed, based on the liquid level height of hydrogen in the storage tank collected by the first liquid level sensor, the distribution state of liquid hydrogen and gaseous hydrogen in the storage tank is obtained; Based on the pressure of hydrogen in the storage tank collected by the pressure sensor and the temperature of hydrogen at different height positions in the storage tank collected by the temperature sensor, the density of hydrogen at different height positions in the storage tank is obtained; Based on the distribution state of gaseous hydrogen and liquid hydrogen in the tank and the density at different heights, the mass of the remaining hydrogen in the tank is obtained.