Hydrogen production system by seawater electrolysis for floating platform and self-adaptive stabilization control method

Abstract

The present application relates to a kind of seawater electrolysis hydrogen production systems and adaptive stable control method for floating platform, the system includes: six degrees of freedom active wave compensation platform, seawater electrolysis hydrogen production unit, multi-source motion perception unit, wave prediction subsystem and intelligent controller.The method includes: information perception and collection, wave prediction and motion compensation calculation, electrolysis parameter dynamic optimization, collaborative execution and closed-loop feedback;While motion compensation, according to platform motion prediction results, real-time adjustment electrolytic cell current density, electrolyte flow, temperature and pressure, form "perception-prediction-compensation-regulation" closed loop.The present application realizes the deep coupling of mechanical motion compensation and electrochemical process parameters, can provide guarantee for quasi-static electrolysis environment under complex sea conditions, significantly improve hydrogen production efficiency, gas purity and equipment life, fill the technical blank of floating platform hydrogen production equipment in motion-process collaborative control field.

Description

Technical Field

[0001] This invention relates to the interdisciplinary field of marine engineering equipment and renewable energy, specifically to a seawater electrolysis hydrogen production system and an adaptive stability control method for floating platforms. Background Technology

[0002] Floating offshore platforms experience six degrees of freedom (DOF) rigid body motion (including heave, roll, pitch, sway, sway, and bow roll) under wave loads, which severely impacts the stable operation of precision equipment on the platform. Existing technologies have proposed various six-DOF wave compensation schemes, such as: active wave compensation platforms based on series-parallel mechanisms, six-DOF compensation devices for offshore drilling platforms, wave compensation systems for shipborne cranes based on hydraulic parallel mechanisms, and offshore wave compensation simulation platforms based on six-DOF motion control. These technical solutions primarily aim to improve the operational safety of the platform, reduce structural dynamic loads, or achieve equipment attitude maintenance, but they have not yet solved the problem of coupling control between wave motion and the electrolytic hydrogen production process.

[0003] The seawater electrolysis hydrogen production process places stringent requirements on the operating environment of the electrolyzer, particularly the precision of electrode spacing, the stability of the electrolyte flow field, and the characteristics of the electrode-electrolyte interface. Wave-induced platform motion can lead to turbulent flow fields within the electrolyzer, uneven gas-liquid phase distribution, and deterioration of mass transfer conditions at the electrode surface. This, in turn, causes a series of problems, including decreased electrolysis efficiency, reduced product gas purity, and accelerated catalyst deactivation. Therefore, there is an urgent need to develop a comprehensive control method that can compensate for the effects of wave motion in real time and synergistically optimize the process parameters for seawater electrolysis hydrogen production on offshore floating platforms to ensure the stable and efficient operation of such systems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a seawater electrolysis hydrogen production system for floating platforms and an adaptive stability control method to solve the aforementioned problems.

[0005] This invention provides the following technical solution: A seawater electrolysis hydrogen production system for a floating platform includes: a six-degree-of-freedom (6DOF) active wave compensation platform, comprising an upper platform, a lower platform, and a multi-branched actuator, for supporting the electrolyzer and offsetting the six-degree-of-freedom motion caused by waves in real time; a seawater electrolysis hydrogen production unit, arranged on the upper platform of the 6DOF active wave compensation platform, for electrolyzing seawater to produce hydrogen; a multi-source motion sensing unit, for real-time acquisition of the pose data and wave information of the 6DOF active wave compensation platform; a wave prediction subsystem, communicatively connected to the multi-source motion sensing unit, for predicting future wave excitation and platform motion response based on historical and real-time wave data; and an intelligent controller, comprising a motion compensation control submodule and an electrolysis operating condition dynamic optimization submodule, communicatively connected to the wave prediction subsystem and the seawater electrolysis hydrogen production unit; the motion compensation control submodule generates a 6DOF compensation command based on the pose data and wave prediction results and drives the 6DOF active wave compensation platform to perform active motion compensation; simultaneously, the electrolysis operating condition dynamic optimization submodule dynamically adjusts the electrolyzer operating parameters based on the coupling relationship between the platform motion state and the electrolysis process parameters.

[0006] Furthermore, the six-degree-of-freedom active wave compensation platform is a parallel mechanism, and the multi-branch actuator is driven by a hydraulic cylinder, an electric cylinder, or a servo motor.

[0007] Furthermore, the multi-source motion sensing unit includes: an inertial measurement unit for acquiring the platform's three-axis angular velocity and acceleration; an attitude sensor for acquiring the platform's roll, pitch, and bow angles; and a radar / wave sensor for acquiring information on wave height, direction, and period around the platform.

[0008] Furthermore, the wave prediction subsystem employs an AR time series model or a neural network model to output second-level future platform six-degree-of-freedom displacement prediction values.

[0009] Furthermore, the electrolysis parameter adjustment commands include: a current density adjustment command, used to dynamically reduce or restore the electrolysis current according to the intensity of platform shaking; a feed flow rate adjustment command, used to maintain the stability of the electrolyte level; and a temperature and pressure adjustment command, used to suppress bubble retention and deterioration of mass transfer on the electrode surface.

[0010] Furthermore, the seawater electrolysis hydrogen production unit is a proton exchange membrane electrolyzer, which integrates: an electrochemical sensor for real-time monitoring of pH and conductivity; a process parameter sensor for monitoring pressure distribution, temperature distribution, and fluid flow rate within the cell; and a gas analyzer for real-time monitoring of hydrogen output purity and impurity gas content.

[0011] This invention also discloses an adaptive stability control method for a seawater electrolysis hydrogen production system for a floating platform, as described above, comprising the following steps: Information perception and acquisition: real-time acquisition of six-degree-of-freedom pose data and wave information of the platform through a multi-source motion sensing unit, and acquisition of the electrolyzer's operating status through sensors; Wave prediction and motion compensation calculation: prediction of the platform's motion response in the next second based on historical and real-time wave data, calculation of the six-degree-of-freedom compensation amount based on the prediction results and real-time pose data, driving the actuator to generate a compensation motion opposite to the wave disturbance; Dynamic optimization of electrolysis parameters: dynamic adjustment of current density, electrolyte flow rate, and working pressure by the electrolysis operating condition dynamic optimization submodule based on the platform motion prediction results and the real-time status of the electrolyzer; Coordinated execution and closed-loop feedback: synchronous execution of the compensation motion and electrolysis parameter adjustment, and feedback of the latest operating status of the electrolyzer to the intelligent controller, forming a perception-prediction-compensation-control closed loop.

[0012] Furthermore, the dynamic optimization of electrolysis parameters includes dynamically adjusting the operating current based on the intensity of shaking, adjusting the seawater feed rate in real time, and maintaining a stable liquid level.

[0013] Furthermore, dynamic optimization of electrolysis parameters also includes adjusting the temperature and pressure of the electrolyzer according to changes in operating conditions.

[0014] Furthermore, under extreme operating conditions, the seawater electrolysis hydrogen production unit can reduce load or shut down safely.

[0015] The present invention has the following beneficial technical effects: This invention establishes a collaborative control mechanism for mechanical motion compensation and electrochemical process regulation by intelligently coupling a six-degree-of-freedom active wave compensation platform with a seawater electrolysis hydrogen production unit. This invention not only effectively maintains the positional stability of the floating electrolyzer but also intelligently optimizes electrolysis process parameters based on the platform's motion state, thereby significantly improving the operating efficiency, stability, and equipment durability of the seawater hydrogen production system in complex marine environments.

[0016] The system of this invention fills the technological gap in motion compensation and process control synergistic optimization of hydrogen production equipment for offshore floating platforms, and provides a solution for the efficient development and utilization of marine renewable energy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a seawater electrolysis hydrogen production system for a floating platform according to the present invention; Figure 2 This is a flowchart of an adaptive stability control method for a seawater electrolysis hydrogen production system for a floating platform, according to the present invention.

[0018] The attached figures are labeled as follows: 1. Upper platform; 2. Lower platform; 3. Seawater electrolysis hydrogen production unit; 4. Hinge; 5. Actuator; 6. Servo driver; 7. Reserved interface. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1 like Figure 1 As shown, this invention discloses a seawater electrolysis hydrogen production system for a floating platform, comprising: a six-degree-of-freedom active wave compensation platform, including an upper platform 1, a lower platform 2, and a multi-branched actuator 5, used to support the electrolyzer and offset the six-degree-of-freedom motion caused by waves in real time; a seawater electrolysis hydrogen production unit 3, arranged on the upper platform 1 of the six-degree-of-freedom active wave compensation platform, used to electrolyze seawater to produce hydrogen; a multi-source motion sensing unit, which collects the pose data and wave information of the six-degree-of-freedom active wave compensation platform in real time; and a wave prediction subsystem, which is communicatively connected to the multi-source motion sensing unit and predicts waves based on historical and real-time wave data. The system predicts future wave excitation and platform motion response. An intelligent controller, including a motion compensation control submodule and an electrolysis condition dynamic optimization submodule, is communicatively connected to the wave prediction subsystem and the seawater electrolysis hydrogen production unit 3. The motion compensation control submodule generates six-degree-of-freedom compensation commands based on the pose data and wave prediction results, driving the six-degree-of-freedom active wave compensation platform to perform active motion compensation. Simultaneously, the electrolysis condition dynamic optimization submodule dynamically adjusts the electrolyzer operating parameters based on the coupling relationship between the platform's motion state and the electrolysis process parameters. Specifically, the electrolysis condition dynamic optimization submodule includes an electrolysis process adaptive controller.

[0021] In this embodiment, the six-degree-of-freedom active wave compensation platform is a parallel mechanism, and the multi-branch actuator 5 is driven by a servo driver 6, which can be a hydraulic cylinder, an electric cylinder, or a servo motor. The upper platform 1, the lower platform 2, and the actuator 5 are connected by hinges 4, and a reserved interface 7 is provided at the lower platform 2 for fixing to a ship or other offshore floating platform.

[0022] The multi-source motion sensing unit includes: an inertial measurement unit for acquiring the platform's three-axis angular velocity and acceleration; an attitude sensor for acquiring the platform's roll, pitch, and bow angles; and a radar / wave sensor for acquiring information on wave height, direction, and period around the platform.

[0023] In this embodiment, the wave prediction subsystem uses an AR time series model or a neural network model to communicate with the radar / wave sensor. Based on historical and real-time wave data, it predicts future wave excitation and platform motion response, and outputs second-level prediction values ​​of the future six-degree-of-freedom displacement of the platform.

[0024] In this embodiment, the electrolysis parameter adjustment commands of the adaptive controller for the electrolysis process include: a current density adjustment command, used to dynamically reduce or restore the electrolysis current according to the intensity of platform shaking; a feed flow rate adjustment command, used to maintain a stable electrolyte level; and temperature and pressure adjustment commands, used to suppress bubble retention and deterioration of mass transfer on the electrode surface. The seawater electrolysis hydrogen production unit 3 is a proton exchange membrane electrolyzer, internally integrating: an electrochemical sensor for real-time monitoring of pH and conductivity; a process parameter sensor for monitoring pressure distribution, temperature distribution, and fluid flow rate within the cell; and a gas analyzer for real-time monitoring of hydrogen output purity and impurity gas content.

[0025] Example 2 This invention also discloses an adaptive stability control method for a seawater electrolysis hydrogen production system for a floating platform according to Embodiment 1, the process of which is as follows: Figure 2 As shown, it includes the following steps: Information Sensing and Acquisition: The six-degree-of-freedom (6DOF) pose data and wave information of the six-DOF active wave compensation platform are acquired in real time through a multi-source motion sensing unit, and the operating status of the electrolyzer is collected through sensors. Specifically, wave height, wave direction, and wave period information of the waves around the platform are acquired through wave / radar sensors; the six-DOF motion data of the platform are monitored in real time through an IMU inertial measurement unit, and the attitude sensor acquires the platform's roll, pitch, and bow angles; electrochemical sensors monitor pH and conductivity in real time; process parameter sensors monitor the pressure distribution, temperature distribution, and fluid flow rate within the tank; and a gas analyzer monitors the hydrogen output purity and impurity gas content in real time.

[0026] Wave prediction and motion compensation calculation: The wave prediction subsystem predicts the platform's motion response in the next second based on historical and real-time wave data. According to the prediction results and real-time pose data, it also receives the working condition evaluation signal from the electrolysis process adaptive controller, calculates the six-degree-of-freedom compensation amount, and drives the actuator to generate a compensating motion opposite to the wave disturbance. Specifically, the six-degree-of-freedom active wave compensation platform receives the drive command, and each branch works in coordination to generate a compensating motion opposite to the wave disturbance, thus establishing a quasi-static working environment for the upper electrolytic cell.

[0027] Dynamic optimization of electrolysis parameters: The adaptive controller of the electrolysis process in the dynamic optimization submodule dynamically adjusts the current density, electrolyte flow rate, and working pressure based on platform motion prediction results, motion compensation back-calculation results, and the real-time status of the electrolyzer. Dynamic optimization of electrolysis parameters includes dynamically adjusting the working current according to the intensity of shaking, adjusting the seawater feed rate in real time to maintain a stable liquid level, and adjusting the temperature and pressure of the electrolyzer according to changes in operating conditions. Under extreme conditions, the seawater electrolysis hydrogen production unit 3 performs load reduction or safe shutdown.

[0028] Collaborative execution and closed-loop feedback: Compensation motion and electrolysis parameter adjustment are executed synchronously, and the latest operating status of the electrolyzer is fed back to the intelligent controller, forming a closed loop of perception-prediction-compensation-control. The entire system achieves continuous self-optimization and adaptive adjustment.

[0029] This invention establishes a collaborative control mechanism for mechanical motion compensation and electrochemical process regulation by intelligently coupling a six-degree-of-freedom active wave compensation platform with a seawater electrolysis hydrogen production unit 3.

[0030] The embodiments described above are merely illustrative of specific implementations of the present invention, and while the descriptions are detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A seawater electrolysis hydrogen production system for a floating platform, characterized in that, include: The six-degree-of-freedom active wave compensation platform includes an upper platform, a lower platform, and a multi-branch actuator, used to support the electrolytic cell and offset the six-degree-of-freedom motion caused by waves in real time; A seawater electrolysis hydrogen production unit is arranged on the upper platform of the six-degree-of-freedom active wave compensation platform and is used to electrolyze seawater to produce hydrogen. The multi-source motion sensing unit collects the pose data and wave information of the six-degree-of-freedom active wave compensation platform in real time. The wave prediction subsystem is communicatively connected to the multi-source motion sensing unit and predicts future wave excitation and platform motion response based on historical and real-time wave data. The intelligent controller includes a motion compensation control submodule and an electrolysis operating condition dynamic optimization submodule, and is communicatively connected to the wave prediction subsystem and the seawater electrolysis hydrogen production unit. The motion compensation control submodule generates a six-degree-of-freedom compensation command based on the pose data and wave prediction results, and drives the six-degree-of-freedom active wave compensation platform to perform active motion compensation. At the same time, the electrolysis condition dynamic optimization submodule dynamically adjusts the electrolytic cell operating parameters based on the coupling relationship between the platform motion state and the electrolysis process parameters.

2. The seawater electrolysis hydrogen production system for a floating platform according to claim 1, characterized in that, The six-degree-of-freedom active wave compensation platform is a parallel mechanism, and the multi-branch actuator is driven by a hydraulic cylinder, an electric cylinder, or a servo motor.

3. The seawater electrolysis hydrogen production system for a floating platform according to claim 1, characterized in that, The multi-source motion sensing unit includes: an inertial measurement unit for acquiring the platform's three-axis angular velocity and acceleration; an attitude sensor for acquiring the platform's roll, pitch, and bow angles; and a radar / wave sensor for acquiring information on wave height, direction, and period around the platform.

4. A seawater electrolysis hydrogen production system for a floating platform according to claim 1, characterized in that, The wave prediction subsystem employs an AR time series model or a neural network model.

5. A seawater electrolysis hydrogen production system for a floating platform according to claim 1, characterized in that, The electrolysis parameter adjustment commands include: current density adjustment command, feed flow rate adjustment command, and temperature and pressure adjustment command.

6. A seawater electrolysis hydrogen production system for a floating platform according to claim 1, characterized in that, The seawater electrolysis hydrogen production unit is a proton exchange membrane electrolyzer, which integrates electrochemical sensors, process parameter sensors, and a gas analyzer.

7. An adaptive stability control method for a seawater electrolysis hydrogen production system for a floating platform according to any one of claims 1-6, characterized in that, Includes the following steps: Information perception and acquisition: The platform's six-degree-of-freedom pose data and wave information are acquired in real time through a multi-source motion sensing unit, and the operating status of the electrolytic cell is collected through sensors; Wave prediction and motion compensation calculation: Based on historical and real-time wave data, predict the platform's motion response in the next second, calculate the six degrees of freedom compensation amount according to the prediction results and real-time pose data, and drive the actuator to generate a compensation motion opposite to the wave disturbance. Dynamic optimization of electrolysis parameters: The dynamic optimization submodule for electrolysis conditions dynamically adjusts the current density, electrolyte flow rate and working pressure based on the platform motion prediction results and the real-time status of the electrolyzer. Collaborative execution and closed-loop feedback: The compensation motion and electrolysis parameter adjustment are executed synchronously, and the latest operating status of the electrolyzer is fed back to the intelligent controller, forming a closed loop of perception-prediction-compensation-control.

8. The adaptive stability control method according to claim 7, characterized in that, Dynamic optimization of electrolysis parameters includes dynamically adjusting the operating current based on the intensity of shaking, adjusting the seawater feed rate in real time, and maintaining a stable liquid level.

9. The adaptive stability control method according to claim 8, characterized in that, Dynamic optimization of electrolysis parameters includes adjusting the temperature and pressure of the electrolytic cell according to changes in operating conditions.

10. The adaptive stability control method according to claim 7, characterized in that, Under extreme operating conditions, the seawater electrolysis hydrogen production unit will either reduce load or shut down safely.

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