Double-circulation heat dissipation water electrolysis hydrogen production system based on AEM

Abstract

The utility model discloses an AEM-based double-circulation heat dissipation water electrolysis hydrogen production system, which comprises an electrolysis module, a hydrogen production module, a hydrogen production module, a hydrogen production module, a hydrogen production module, a hydrogen production module, a hydrogen production module, a hydrogen production module and a hydrogen production module, and is characterized in that the electrolysis module comprises an AEM electrolytic bath; the heat dissipation module comprises a branching pipeline structure, and a main pipeline of the branching pipeline structure is connected with the cooling liquid outlet; and the small circulation heat dissipation loop is connected to the main pipeline through a branch pipeline and is provided with a water pump and a thermostat, and the thermostat is used for closing the large circulation when the temperature is lower than a set threshold value. The problem that a traditional water electrolysis hydrogen production system is insufficient in heat dissipation efficiency in the high-temperature stage is solved through cooperation of the double-circulation dynamic heat dissipation module and the diameter dividing pipeline, large and small circulation heat dissipation loops are automatically switched through the thermostat, parallel heat dissipation devices are started at the high temperature, flow distribution of different pipe diameters is combined, the heat dissipation capacity is remarkably improved, and the heat dissipation efficiency is improved. And the electrolytic bath keeps stable operation under different temperature working conditions, aging of a membrane material is effectively slowed down, and the service life of equipment is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of water electrolysis hydrogen production technology, and in particular to a dual-cycle heat dissipation water electrolysis hydrogen production system based on AEM. Background Technology

[0002] Hydrogen production through water electrolysis has garnered significant attention in the hydrogen energy industry in recent years as an important pathway for clean energy production. This technology generates high-purity hydrogen and oxygen through the electrolysis of water, and can be widely applied in fuel cells, chemical synthesis, and energy storage. However, traditional water electrolysis hydrogen production systems, especially small- to medium-scale anion exchange membrane (AEM) based systems, still face numerous technical bottlenecks in practical applications. The following problems still exist with traditional water electrolysis hydrogen production systems:

[0003] 1. Low heat dissipation efficiency: A single heat dissipation circuit cannot meet the heat dissipation requirements of different temperature stages of the electrolytic cell. The efficiency decreases when operating at high temperatures, and the membrane life is shortened.

[0004] 2. Complex liquid level control: It relies on electronic sensors or mechanical valves, which are costly and prone to failure.

[0005] 3. High pressure loss in pipelines: The dispersed layout of separators and electrolytic cells and the long gas transmission path lead to increased pressure loss. Summary of the Invention

[0006] This invention overcomes the shortcomings of the prior art and provides a dual-cycle heat dissipation electrolysis water production hydrogen production system based on AEM. Through dual-cycle heat dissipation and physical liquid level control technology, it significantly improves the operational stability of the electrolyzer and the hydrogen production efficiency, and is suitable for small and medium-scale hydrogen production scenarios.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: a dual-cycle heat dissipation electrolysis water production system based on AEM, comprising:

[0008] An electrolysis module comprising an AEM electrolyzer, wherein the AEM electrolyzer is provided with a coolant inlet, a coolant outlet, a hydrogen outlet, and an oxygen outlet;

[0009] The heat dissipation module includes:

[0010] The pipe structure has a main pipeline connected to the coolant outlet.

[0011] The small circulation cooling circuit is connected to the main circuit through a branch pipe and is equipped with a water pump and a thermostat. The thermostat is used to shut down the large circulation when the temperature is lower than a set threshold.

[0012] A large-circuit heat dissipation loop is directly connected to the coolant inlet through the main pipeline, and parallel radiators are provided in the main pipeline;

[0013] The gas separation module is used to separate hydrogen and oxygen produced by the AEM electrolysis cell and maintain liquid level balance through a physical liquid level control structure.

[0014] The control module is used to monitor system temperature and pressure, and adjust the heat dissipation circuit and safety protection mechanism according to the monitoring signals.

[0015] In a preferred embodiment of this utility model, the thermostat dynamically switches the coolant flow direction between the small circulation and the large circulation based on the temperature signal of the coolant outlet; the diameter of the main pipeline is 38-50mm, the diameter of the branch pipeline is 15-38mm, and the diameter of the radiator is 38-50mm.

[0016] In a preferred embodiment of this utility model, the gas separation module includes a hydrogen separator, an oxygen separator, and a water tank. The bottoms of the hydrogen separator and the oxygen separator are connected to the water tank via U-shaped pipes. The diameter of the U-shaped pipes is 20-38mm, and the separators and the water tank are at the same horizontal level.

[0017] In a preferred embodiment of this invention, the inlet of the hydrogen separator is connected to the hydrogen outlet via a pipe with a diameter of 15-38 mm, and the inlet of the oxygen separator is connected to the oxygen outlet via a pipe with a diameter of 15-38 mm.

[0018] In a preferred embodiment of this utility model, the two ends of the U-shaped tube are respectively fixed to the bottom of the hydrogen separator and the oxygen separator, and the horizontal alignment error between the hydrogen separator and the oxygen separator and the water tank is less than 2mm.

[0019] In a preferred embodiment of this invention, the AEM electrolyzer, the hydrogen separator, and the oxygen separator are arranged vertically, and the hydrogen and oxygen delivery pipelines extend in a vertical direction to shorten the gas transmission path.

[0020] In a preferred embodiment of this invention, a hydrogen flow meter is installed at the outlet of the hydrogen separator.

[0021] In a preferred embodiment of this utility model, the control module includes a temperature sensor, a pressure sensor, and a PID controller. The temperature sensor is located at the coolant outlet, the pressure sensor is located at the hydrogen separator outlet, and the PID controller is linked with the thermostat to switch the heat dissipation circuit.

[0022] In a preferred embodiment of this utility model, the control module further includes an overpressure protection unit, which is linked to the DC power supply of the AEM electrolytic cell and cuts off the power supply when the pressure exceeds a set threshold.

[0023] In a preferred embodiment of this invention, the input terminal of the AEM electrolytic cell is connected to a DC power supply with a power of 3-5kW.

[0024] This utility model solves the defects existing in the background technology, and has the following beneficial effects:

[0025] (1) This utility model provides a dual-circulation heat dissipation electrolysis water hydrogen production system based on AEM. Through the coordinated cooperation of the dual-circulation dynamic heat dissipation module and the divided diameter pipeline, the problem of insufficient heat dissipation efficiency of the traditional electrolysis water hydrogen production system at high temperature is solved. The thermostat automatically switches between large and small circulation heat dissipation loops. When the temperature is high, the parallel heat sink is activated and combined with the flow distribution of different pipe diameters, which significantly improves the heat dissipation capacity, so that the electrolyzer can maintain stable operation under different temperature conditions, effectively slow down the aging of membrane materials, and extend the service life of the equipment.

[0026] (2) In this utility model, a physical liquid level control structure is adopted in which the separator and the water tank are connected by a U-shaped pipe. This abandons the traditional complex control method that relies on electronic sensors or mechanical valves. The liquid level is automatically balanced by using the principle of communicating vessels. This not only simplifies the system structure, but also greatly reduces the risk of downtime caused by failure of external control devices, and improves the reliability and long-term stability of liquid level control.

[0027] (3) In this utility model, by setting up an overpressure protection unit and a pressure sensor in the control module, the risk of membrane material rupture, pipeline leakage or hydrogen accumulation caused by pressure runaway is effectively avoided, which significantly improves the safety and reliability of the system. At the same time, the linkage design of the overpressure protection unit and the PID controller further ensures that the system can automatically enter the protection state under extreme working conditions, reducing the possibility of human error and providing a fully automated safety barrier for small and medium-sized hydrogen production scenarios, taking into account both the extension of equipment life and the safety of the operating environment. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0029] Figure 1 This is a frontal perspective view of a preferred embodiment of the present invention;

[0030] Figure 2 This is a rear-view perspective structural diagram of a preferred embodiment of the present invention;

[0031] Figure 3 This is a block diagram of the PID control logic of the hydrogen production system according to a preferred embodiment of this utility model;

[0032] In the diagram: 1. AEM electrolytic cell; 2. Water pump; 3. Thermostat; 4. Radiator; 5. Hydrogen separator; 6. Oxygen separator; 7. Water tank. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0034] like Figure 1-3 As shown, a dual-circulation heat dissipation electrolysis water production system based on AEM includes: an electrolysis module comprising an AEM electrolyzer 1, which has a coolant inlet, a coolant outlet, a hydrogen outlet, and an oxygen outlet; a heat dissipation module comprising: a branched pipe structure, the main pipe of which is connected to the coolant outlet; a small-circulation heat dissipation loop, which is connected to the main pipe through branch pipes and is equipped with a water pump 2 and a thermostat 3, the thermostat 3 being used to shut down the large-circulation loop when the temperature is lower than a set threshold; a large-circulation heat dissipation loop, which is directly connected to the coolant inlet through the main pipe, and the main pipe is equipped with parallel radiators 4; a gas separation module, used to separate hydrogen and oxygen produced by the AEM electrolyzer 1 and maintain liquid level balance through a physical liquid level control structure; and a control module, used to monitor system temperature and pressure and adjust the heat dissipation loop and safety protection mechanism according to the monitoring signals.

[0035] It should be noted that the thermostat 3 dynamically switches the coolant flow direction between the small and large circulation loops based on the coolant outlet temperature signal; the main pipe diameter is 38-50mm, and the branch pipe diameter is 15-38mm.

[0036] Specifically, the AEM electrolyzer 1, as the core component for hydrogen production, has its coolant inlet and outlet connected to the branch-diameter piping structure of the heat dissipation module. The main pipe is 38mm in diameter, extending directly to the coolant outlet of the electrolyzer and connected to the parallel radiator 4 in the large circulation heat dissipation loop. The branch pipes are 25mm in diameter and connected to the water pump 2 and independent radiator 4 in the small circulation heat dissipation loop via thermostat 3. When the coolant temperature is below a set threshold (e.g., ≤60℃), thermostat 3 closes the large circulation loop, and only the branch pipes in the small circulation loop provide low-temperature heat dissipation. At this time, water pump 2 drives the coolant to flow through the smaller diameter radiator 4, achieving rapid cooling. When the temperature rises above the threshold (e.g., >60℃), thermostat 3 automatically switches to the large circulation loop, and the coolant is diverted through the main pipe to the parallel radiator 4, utilizing a larger flow rate and heat dissipation area to improve heat dissipation efficiency under high-temperature conditions. This dynamic switching mechanism ensures that the AEM electrolyzer 1 maintains a stable operating state at different temperature stages, avoiding performance degradation of the membrane material due to insufficient heat dissipation.

[0037] In some embodiments, the gas separation module includes a hydrogen separator 5, an oxygen separator 6, and a water tank 7. The bottoms of the hydrogen separator 5 and the oxygen separator 6 are connected to the water tank 7 via U-shaped pipes. The diameter of the U-shaped pipes is 20-38 mm, preferably 32 mm, and the separators and the water tank 7 are at the same horizontal level.

[0038] It should be noted that the inlet of the hydrogen separator 5 is connected to the hydrogen outlet through a pipe with a diameter of 15-38mm, preferably 38mm, and the inlet of the oxygen separator 6 is connected to the oxygen outlet through a pipe with a diameter of 15-38mm, preferably 15mm; the two ends of the U-shaped tube are fixed to the bottom of the hydrogen separator 5 and the oxygen separator 6 respectively, and the horizontal alignment error between the hydrogen separator 5 and the oxygen separator 6 and the water tank 7 is less than 2mm.

[0039] Specifically, the gas separation module achieves passive liquid level regulation through a physical liquid level control structure. The bottoms of the hydrogen separator 5 and the oxygen separator 6 are connected to the water tank 7 via a 32mm diameter U-shaped pipe, automatically balancing the liquid level using the principle of communicating vessels. The horizontal alignment error between the separators and the water tank 7 is strictly controlled within 2mm, ensuring that liquid level regulation does not rely on electronic sensors or mechanical valves, which simplifies the structure and improves the reliability of long-term operation.

[0040] In some embodiments, the AEM electrolyzer 1 is arranged vertically with the hydrogen separator 5 and the oxygen separator 6, and the hydrogen and oxygen delivery pipelines extend vertically to shorten the gas transmission path.

[0041] Specifically, the vertical integration of the AEM electrolyzer 1 with the hydrogen separator 5 and oxygen separator 6 shortens the gas transmission path and reduces fluid resistance. Combined with the diversion characteristics of the multi-diameter pipeline, it effectively reduces the pressure loss of gas during transmission, improves hydrogen production efficiency and overall system energy efficiency, and provides a compact and efficient equipment configuration solution for small and medium-scale hydrogen production scenarios.

[0042] In some implementations, a hydrogen flow meter is installed at the outlet of the hydrogen separator 5 to monitor the hydrogen production in real time.

[0043] In some embodiments, the control module includes a temperature sensor, a pressure sensor, and a PID controller. The temperature sensor is located at the coolant outlet, the pressure sensor is located at the outlet of the hydrogen separator 5, and the PID controller is linked with the thermostat 3 to switch the heat dissipation circuit. The control module also includes an overpressure protection unit, which is linked with the DC power supply of the AEM electrolyzer 1 and cuts off the power supply when the pressure exceeds a set threshold.

[0044] Specifically, the control module achieves real-time monitoring and regulation of the system through the linkage of temperature sensors, pressure sensors, and a PID controller. The temperature sensor, installed at the coolant outlet, provides real-time feedback on the heat dissipation status to the PID controller, driving the thermostat 3 to switch the heat dissipation circuit. The pressure sensor, located at the outlet of the hydrogen separator 5, monitors gas pressure changes. When the pressure exceeds the safety threshold, the overpressure protection unit immediately cuts off the electrolyzer power supply to prevent equipment damage or safety hazards. The synergy between overpressure protection and PID control ensures the system quickly enters a protection state under abnormal operating conditions, reducing the need for human intervention.

[0045] In some implementations, the input terminal of the AEM electrolytic cell 1 is connected to a DC power supply with a power of 3-5kW; this satisfies the energy requirements of the electrolytic cell while ensuring the economy of the system.

[0046] In operation, the hydrogen and oxygen produced by the AEM electrolyzer 1 after being powered on are respectively transported to the hydrogen separator 5 and oxygen separator 6 via pipelines. The coolant circulates in the heat dissipation module to dissipate the heat of electrolysis. In the initial stage, the small circulation branch is activated first to quickly balance the temperature; as the operating load increases, the temperature rises, triggering the large circulation heat dissipation, and the cooling capacity is enhanced by the parallel radiator 4. The gas in the separator is output after the liquid level is balanced, while the water tank 7 adjusts the liquid level of the separator in real time through a U-shaped pipe to ensure continuous and stable operation of the system. The entire process is fully automated through the control module, taking into account efficient hydrogen production, heat dissipation optimization, and safety assurance, and is especially suitable for distributed small and medium-scale hydrogen production scenarios.

[0047] Based on the above description and the preferred embodiments of this utility model, it will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0048] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dual-cycle heat dissipation electrolysis water production system based on AEM, characterized in that, include: An electrolysis module comprising an AEM electrolysis cell (1), wherein the AEM electrolysis cell (1) is provided with a coolant inlet, a coolant outlet, a hydrogen outlet and an oxygen outlet; The heat dissipation module includes: The pipe structure has a main pipeline connected to the coolant outlet. The small circulation cooling circuit is connected to the main circuit through a branch pipe and is equipped with a water pump (2) and a thermostat (3). The thermostat (3) is used to shut down the large circulation when the temperature is lower than a set threshold. The large circulation heat dissipation circuit is directly connected to the coolant inlet through the main pipeline, and the main pipeline is equipped with parallel radiators (4). The gas separation module is used to separate hydrogen and oxygen generated by the AEM electrolysis cell (1) and maintain liquid level balance through a physical liquid level control structure. The control module is used to monitor system temperature and pressure, and adjust the heat dissipation circuit and safety protection mechanism according to the monitoring signals.

2. The dual-cycle heat dissipation electrolysis water production system based on AEM according to claim 1, characterized in that: The thermostat (3) dynamically switches the coolant flow direction between the small circulation and the large circulation according to the temperature signal of the coolant outlet; the diameter of the main pipeline is 38-50mm, the diameter of the branch pipeline is 15-38mm, and the diameter of the radiator (4) is 38-50mm.

3. The dual-cycle heat dissipation electrolysis water production system based on AEM according to claim 1, characterized in that: The gas separation module includes a hydrogen separator (5), an oxygen separator (6), and a water tank (7). The bottoms of the hydrogen separator (5) and the oxygen separator (6) are connected to the water tank (7) through a U-shaped pipe. The diameter of the U-shaped pipe is 20-38mm, and the separator and the water tank (7) are on the same horizontal plane.

4. The dual-cycle heat dissipation electrolysis water production system based on AEM according to claim 3, characterized in that: The inlet of the hydrogen separator (5) is connected to the hydrogen outlet through a pipe with a diameter of 15-38 mm, and the inlet of the oxygen separator (6) is connected to the oxygen outlet through a pipe with a diameter of 15-38 mm.

5. The dual-cycle heat dissipation electrolysis water production system based on AEM according to claim 3, characterized in that: The two ends of the U-shaped tube are fixed to the bottom of the hydrogen separator (5) and the oxygen separator (6) respectively, and the horizontal alignment error between the hydrogen separator (5) and the oxygen separator (6) and the water tank (7) is less than 2mm.

6. The dual-cycle heat dissipation electrolysis water production system based on AEM according to claim 3, characterized in that: The AEM electrolyzer (1) is arranged vertically with the hydrogen separator (5) and the oxygen separator (6), and the hydrogen and oxygen delivery pipelines extend in the vertical direction to shorten the gas transmission path.

7. The dual-cycle heat dissipation electrolysis water production system based on AEM according to claim 3, characterized in that: The outlet of the hydrogen separator (5) is equipped with a hydrogen flow meter.

8. The dual-cycle heat dissipation electrolysis water production system based on AEM according to claim 3, characterized in that: The control module includes a temperature sensor, a pressure sensor and a PID controller. The temperature sensor is located at the coolant outlet, the pressure sensor is located at the outlet of the hydrogen separator (5), and the PID controller is linked with the thermostat (3) to switch the heat dissipation circuit.

9. A dual-cycle heat dissipation electrolysis water production system based on AEM according to claim 8, characterized in that: The control module also includes an overpressure protection unit, which is linked to the DC power supply of the AEM electrolytic cell (1) and cuts off the power supply when the pressure exceeds a set threshold.

10. The dual-cycle heat dissipation electrolysis water production system based on AEM according to claim 1, characterized in that: The input terminal of the AEM electrolytic cell (1) is connected to a DC power supply with a power of 3-5kW.

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