Temperature stabilization system for coupling of alkaline water electrolysis hydrogen production device and photovoltaic panel

Abstract

The utility model discloses a temperature stabilizing system for coupling an alkaline electrolytic water hydrogen production device and a photovoltaic panel, a solar photovoltaic panel is electrically connected with an electrolytic bath, and the solar photovoltaic panel supplies power to the electrolytic bath through a constant-current direct-current circuit; the charging and discharging energy storage assembly is used for receiving excess electric energy of the solar photovoltaic panel or providing energy for the electrolytic cell, and the charging and discharging energy storage assembly is electrically connected with the electrolytic cell; the alkali liquor box is connected with the electrolytic bath through a pipeline and supplements alkali liquor into the electrolytic bath through the peristaltic pump, and the alkali liquor box is connected with a temperature sensor and a heater; the intelligent control system is electrically connected with the solar photovoltaic panel, the constant-current direct-current circuit, the charging and discharging energy storage assembly, the temperature sensor, the peristaltic pump and the heater and monitors the output power of the solar photovoltaic panel, the electric quantity of the charging and discharging energy storage assembly and parameters of the temperature sensor in real time. And the output current of the constant-current direct-current circuit, the working state of the heater and the output flow of the peristaltic pump are controlled according to the corresponding data.

Description

Technical Field

[0001] The utility model belongs to the technical field of new energy, and particularly relates to a temperature stabilization system for coupling an alkaline water electrolysis hydrogen production device and a photovoltaic panel. Background Art

[0002] With the development of renewable energy, the coupled application of an alkaline water electrolysis hydrogen production device and a photovoltaic panel has attracted more and more attention. However, due to the instability of photovoltaic power generation or voltage, especially the characteristic of no power generation at night, a series of problems have been brought to the operation of the electrolyzer.

[0003] During the day, the fluctuation of photovoltaic power generation may lead to the instability of the input current and voltage of the electrolyzer, affecting the electrolysis efficiency and hydrogen production. At night, due to no power input, the electrolyzer stops working, and the temperature of the internal liquid will gradually decrease. If the temperature drops too fast or too low, it will have an adverse impact on the performance and life of the electrolyzer, such as reducing the electrolysis reaction rate, increasing energy consumption, and damaging the electrodes.

[0004] Therefore, how to provide a temperature stabilization system for coupling an alkaline water electrolysis hydrogen production device and a photovoltaic panel is an urgent problem to be solved by those skilled in the art. Summary of the Utility Model

[0005] In view of this, the utility model provides a temperature stabilization system for coupling an alkaline water electrolysis hydrogen production device and a photovoltaic panel to solve the problems caused by the instability of photovoltaic power generation or voltage and the non-generation of electricity at night in the electrolyzer.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: A temperature stabilization system for coupling an alkaline water electrolysis hydrogen production device and a photovoltaic panel, which comprises:

[0007] A solar photovoltaic panel, the solar photovoltaic panel is electrically connected to the electrolyzer, and the solar photovoltaic panel supplies power to the electrolyzer through a constant current DC circuit;

[0008] A charge-discharge energy storage component, the charge-discharge energy storage component is used to receive the excess electric energy of the solar photovoltaic panel or provide energy for the electrolyzer, and the charge-discharge energy storage component is electrically connected to the electrolyzer;

[0009] An alkali liquid tank, the alkali liquid tank is connected to the electrolyzer through a pipeline and replenishes alkali liquid into the electrolyzer through a peristaltic pump, and a temperature sensor and a heater are connected to the alkali liquid tank;

[0010] Intelligent control system, the intelligent control system is electrically connected to a solar photovoltaic panel, a constant current DC circuit, a charge-discharge energy storage component, a temperature sensor, a peristaltic pump and a heater respectively. The intelligent control system monitors the output power of the solar photovoltaic panel, the power of the charge-discharge energy storage component and the parameters of the temperature sensor in real time, and controls the output current of the constant current DC circuit, the working state of the heater and the output flow of the peristaltic pump according to the corresponding data.

[0011] The beneficial effects of the present utility model are as follows: The solar photovoltaic panel converts solar energy into electrical energy. A part of the electrical energy is supplied to the electrolytic cell for operation, and the excess electrical energy can be stored by the charge-discharge energy storage component and used for supplementation at night or when the solar power is insufficient. The alkali liquid tank supplies alkali liquid to the electrolytic cell. When the temperature drops at night, the heater can heat the alkali liquid tank to increase the temperature of the alkali liquid to maintain the stable working temperature of the electrolytic cell, improve the hydrogen production efficiency, reduce the energy consumption, and at the same time ensure the service life and safety of the electrolytic cell. The intelligent control system links the system components to achieve the coordinated control and efficient operation of the system, realizes the balance and stability of the system power, and improves the working efficiency and hydrogen production of the electrolytic water hydrogen production device.

[0012] Preferably, the charge-discharge energy storage component is a battery pack or a super capacitor.

[0013] The resulting technical effect is that the charge-discharge energy storage component is used to store the excess electrical energy output by the photovoltaic panel and supply power to the system when the output power of the photovoltaic panel is insufficient, with both charging and discharging functions.

[0014] Preferably, the heater can be arranged outside or inside the alkali liquid tank, and the temperature sensor is arranged inside the alkali liquid tank to detect the temperature of the alkali liquid.

[0015] The resulting technical effect is that the purpose of the heater is to increase the temperature of the alkali liquid so that the temperature of the alkali liquid is between 80°C and 90°C to maintain the stable working temperature of the electrolytic cell and reduce unnecessary losses.

[0016] Preferably, the intelligent control system sets parameter thresholds. When the output power of the solar photovoltaic panel is greater than the required power of the electrolytic cell, the intelligent control system stores the excess electrical energy in the charge-discharge energy storage component; when the output power of the solar photovoltaic panel is less than the required power of the electrolytic cell, the intelligent control system controls the charge-discharge energy storage component to discharge to ensure the normal operation of the electrolytic cell.

[0017] The resulting technical effect is that when the output power of the solar photovoltaic panel is greater than the required power of the electrolytic cell, the intelligent control system will store the excess electrical energy in the charge-discharge energy storage component. On cloudy days or at night when the output power of solar energy is low, the charge-discharge energy storage component discharges to ensure the normal operation of the electrolytic cell.

[0018] Preferably, when the temperature detected by the temperature sensor is lower than the set lower threshold, the intelligent control system starts the heater to heat the electrolytic cell; when the temperature detected by the temperature sensor is higher than the set upper threshold, the intelligent control system controls the heater to stop heating to ensure that the electrolytic cell operates within an appropriate temperature range.

[0019] The resulting technical effect is that the temperature of the lye in the lye tank is detected by the temperature sensor, and when it is lower than the temperature threshold, heating is controlled by the heater until the lye temperature is within a predetermined range.

[0020] Preferably, a liquid level sensor is arranged in the electrolytic cell. The liquid level sensor is electrically connected to the intelligent control system, and the liquid level sensor feeds back the consumption of the lye in the electrolytic cell to the intelligent control system and controls the working state of the peristaltic pump.

[0021] The resulting technical effect is that the intelligent control system also controls the flow rate of the peristaltic pump according to the working state of the electrolytic cell and the consumption of the lye to ensure stable supply of the lye. Description of the Drawings

[0022] Figure 1 It is a framework diagram of a temperature stabilization system for coupling an alkaline electrolytic water hydrogen production device with a photovoltaic panel according to the present utility model.

[0023] 1 Solar photovoltaic panel, 2 Electrolytic cell, 3 Constant current DC circuit, 4 Charge and discharge energy storage component, 5 Lye tank, 6 Temperature sensor, 7 Heater, 8 Intelligent control system, 9 Peristaltic pump. Detailed Embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] Refer to the attached drawings of the present utility model Figure 1 , according to an embodiment of the present utility model, a temperature stabilization system for coupling an alkaline electrolytic water hydrogen production device with a photovoltaic panel includes:

[0026] A solar photovoltaic panel 1, the solar photovoltaic panel 1 is electrically connected to the electrolytic cell 2, and the solar photovoltaic panel 1 supplies power to the electrolytic cell 2 through a constant current DC circuit 3;

[0027] The charge-discharge energy storage component 4 is used to receive the excess electric energy of the solar photovoltaic panel 1 or provide energy for the electrolyzer. The charge-discharge energy storage component 4 is electrically connected to the electrolyzer 2;

[0028] The lye tank 5 is connected to the electrolyzer 2 through a pipeline and replenishes lye into the electrolyzer 2 through a peristaltic pump 9. A temperature sensor 6 and a heater 7 are connected to the lye tank 5;

[0029] The intelligent control system 8 is electrically connected to the solar photovoltaic panel 1, the constant-current DC circuit 3, the charge-discharge energy storage component 4, the temperature sensor 6, the peristaltic pump 9, and the heater 7 respectively. The intelligent control system 8 monitors the output power of the solar photovoltaic panel 1, the power of the charge-discharge energy storage component 4, and the parameters of the temperature sensor 6 in real time, and controls the output current of the constant-current DC circuit, the working state of the heater, and the output flow of the peristaltic pump according to the corresponding data.

[0030] In some other embodiments, the charge-discharge energy storage component 4 is a battery pack or a supercapacitor, which can effectively store and release electric energy.

[0031] In some other specific embodiments, the heater 7 can be arranged outside or inside the lye tank 5. The heater is actually an electric hot plate for heating, and the temperature is controlled between 80°C and 90°C. The temperature sensor 6 is arranged inside the lye tank 5 and detects the temperature of the lye.

[0032] In some other embodiments, the intelligent control system 8 sets parameter thresholds. When the output power of the solar photovoltaic panel is greater than the required power of the electrolyzer, the intelligent control system 8 stores the excess electric energy in the charge-discharge energy storage component 4; when the output power of the solar photovoltaic panel is less than the required power of the electrolyzer, the intelligent control system 8 controls the charge-discharge energy storage component 4 to discharge to ensure the normal operation of the electrolyzer.

[0033] In some other specific embodiments, when the temperature sensor 6 detects that the temperature is lower than the set lower threshold, the intelligent control system 8 starts the heater to heat the electrolyzer; when the temperature sensor 6 detects that the temperature is higher than the set upper threshold, the intelligent control system 8 controls the heater to stop heating to ensure that the electrolyzer operates within an appropriate temperature range.

[0034] In some other embodiments, a liquid level sensor is arranged in the electrolyzer 2. The liquid level sensor is electrically connected to the intelligent control system 8, and the liquid level sensor feeds back the consumption of the lye in the electrolyzer to the intelligent control system 8 and controls the working state of the peristaltic pump.

[0035] In practical applications, the parameters of the system can be optimized and adjusted according to different lighting conditions and hydrogen production requirements to achieve the best power and temperature stability effect.

[0036] Installation and Commissioning

[0037] Install the solar photovoltaic panel 1 at a suitable position according to the design requirements to ensure sufficient sunlight exposure.

[0038] Install the intelligent control system 8, charge-discharge energy storage component 4, constant-current DC circuit 3, heater 7, lye tank 5, temperature sensor 6, peristaltic pump 9, and electrolyzer 2 at their respective positions and connect the lines properly.

[0039] Conduct system commissioning, including parameter setting of the intelligent control system 8, charge-discharge test of the charge-discharge energy storage component 4, heating effect test of the heater 7, and accuracy test of the temperature sensor 6, etc.

[0040] After the commissioning is completed, the system can be put into normal operation.

[0041] Maintenance and Servicing

[0042] Regularly check the surface cleanliness of the solar photovoltaic panel 1. If there is dirt, clean it in time to ensure the power generation efficiency.

[0043] Check the working status of the intelligent control system 8, charge-discharge energy storage component 4, heater 7, and temperature sensor 6. If there are any abnormalities, repair or replace them in time.

[0044] Regularly maintain the electrolyzer 2, including cleaning the electrodes, replacing the electrolyte, etc., to ensure the performance and lifespan of the electrolyzer 2.

[0045] This new type solves the problem of temperature variation in the electrolyzer caused by unstable photovoltaic power generation and no power generation at night. An innovative charge-discharge energy storage component is set up to store electrical energy when the solar photovoltaic power generation is excessive, and supply power to the electrolyzer and heating device when the power is insufficient or at night, effectively maintaining the operation and temperature stability of the electrolyzer.

[0046] A heater is installed, which can heat the liquid in the electrolyzer according to the monitoring signal of the temperature sensor when needed, slowing down the rate of temperature decrease of the electrolyzer liquid or maintaining the temperature of the internal liquid.

[0047] This product constructs an integrated control system. The controller accurately controls the operation of the charge-discharge energy storage and the heater according to the signal of the temperature sensor, maintaining the temperature of the liquid in the electrolyzer within a suitable range, improving the stability and reliability of the electrolyzer, increasing the hydrogen production efficiency, reducing the energy consumption, and at the same time ensuring the lifespan and safety of the electrolyzer.

[0048] For the devices and usage methods disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For relevant parts, refer to the description in the method section.

[0049] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A temperature stabilization system for coupling an alkaline water electrolysis hydrogen production device with a photovoltaic panel, characterized in that: include: A solar photovoltaic panel (1), wherein the solar photovoltaic panel (1) is electrically connected to an electrolytic cell (2), and the solar photovoltaic panel (1) supplies power to the electrolytic cell (2) via a constant current direct current circuit (3); A charge-discharge energy storage component (4), the charge-discharge energy storage component (4) is used to receive excess electric energy from the solar photovoltaic panel (1) or to provide energy for the electrolyzer, and the charge-discharge energy storage component (4) is electrically connected to the electrolyzer (2); an alkali liquid tank (5), the alkali liquid tank (5) being connected to a pipeline of the electrolytic cell (2) and replenishing alkali liquid into the electrolytic cell (2) via a peristaltic pump (9), the alkali liquid tank (5) being connected to a temperature sensor (6) and a heater (7); An intelligent control system (8), wherein the intelligent control system (8) is electrically connected to the solar photovoltaic panel (1), the constant current DC circuit (3), the charge-discharge energy storage component (4), the temperature sensor (6), the peristaltic pump (9) and the heater (7), respectively. The intelligent control system (8) monitors the output power of the solar photovoltaic panel (1), the power of the charge-discharge energy storage component (4) and the parameters of the temperature sensor (6) in real time, and controls the output current of the constant current DC circuit, the working state of the heater and the output flow of the peristaltic pump according to the corresponding data.

2. A temperature stabilization system for coupling an alkaline water electrolysis hydrogen production device with a photovoltaic panel according to claim 1, characterized in that: The charge-discharge energy storage component (4) is a battery pack or a supercapacitor.

3. A temperature stabilization system for coupling an alkaline water electrolysis hydrogen production device with a photovoltaic panel according to claim 1, characterized in that: The heater (7) may be arranged on the outside or inside of the alkali liquid tank (5), and the temperature sensor (6) is arranged on the inside of the alkali liquid tank (5) to detect the temperature of the alkali liquid.

4. A temperature stabilization system for coupling an alkaline water electrolysis hydrogen production device with a photovoltaic panel according to claim 1, characterized in that: The intelligent control system (8) sets a parameter threshold value. When the output power of the solar photovoltaic panel is greater than the required power of the electrolytic cell, the intelligent control system (8) stores the excess electric energy in the charge-discharge energy storage component (4); when the output power of the solar photovoltaic panel is less than the required power of the electrolytic cell, the intelligent control system (8) controls the charge-discharge energy storage component (4) to discharge, thereby achieving normal operation of the electrolytic cell.

5. A temperature stabilization system for coupling an alkaline water electrolysis hydrogen production device with a photovoltaic panel according to claim 4, characterized in that: When the temperature detected by the temperature sensor (6) is lower than a set lower threshold, the intelligent control system (8) starts the heater to heat the electrolytic cell; when the temperature detected by the temperature sensor (6) is higher than a set upper threshold, the intelligent control system (8) controls the heater to stop heating, so as to ensure that the electrolytic cell operates within an appropriate temperature range.

6. A temperature stabilization system for coupling an alkaline water electrolysis hydrogen production device with a photovoltaic panel according to claim 4, characterized in that: A liquid level sensor is arranged in the electrolytic cell (2), and the liquid level sensor is electrically connected to the intelligent control system (8). The liquid level sensor feeds back the consumption of alkali solution in the electrolytic cell to the intelligent control system (8) and controls the working state of the peristaltic pump.

Images