Clean power supply hydrogen production coupling water desalination system and power configuration method thereof

Abstract

The invention belongs to the technical field of clean power supply hydrogen production and water desalination, and provides a clean power supply hydrogen production coupling water desalination system and a power configuration method thereof, and the method comprises the steps: building a clean power supply priority distribution model; wherein the clean energy is preferentially provided for the hydrogen production device; based on the electricity purchase cost, a heat storage tank state optimization model is established; and jointly solving the clean power supply priority distribution model and the heat storage tank state optimization model to obtain the optimal power configuration of the clean power supply and the hydrogen production device. By optimizing the configuration proportion of the clean power supply and the hydrogen production power, the utilization of abandoned electricity and waste heat in hydrogen production by wind energy and solar energy is realized.

Description

Technical Field

[0001] This disclosure pertains to the field of clean power hydrogen production and water desalination technology, and particularly relates to a clean power hydrogen production coupled water desalination system, power configuration method, system, equipment, medium and product. Background Technology

[0002] Hydrogen production through water electrolysis consumes a large amount of water resources, while regions rich in wind and solar energy resources face a shortage of freshwater. Providing freshwater through seawater, saline water, or brackish water desalination is an effective way to address this shortage. Water desalination technologies mainly include membrane methods and thermal methods, both of which require significant energy consumption. Membrane methods utilize the separation effect of reverse osmosis membranes to achieve water desalination, requiring relatively stable electrical energy input. Thermal methods utilize the principle of water vapor condensation to achieve water desalination, and are more sensitive to the stability of thermal energy input.

[0003] Currently, the prominent contradiction facing the development of the water electrolysis hydrogen production industry is the rigid constraint of the intermittent, fluctuating, and unstable nature of wind and solar power generation, which leads to a high demand for hydrogen production equipment capacity, while the poor economic efficiency of hydrogen production equipment under high-power conditions is caused by insufficient annual effective utilization hours. This contradiction determines that in actual production, water electrolysis hydrogen production cannot achieve full and effective utilization of wind and solar power generation, and some power curtailment still exists.

[0004] The efficiency of hydrogen production by water electrolysis is maintained at 50-60%. A large amount of waste heat is generated during the hydrogen production process, with the heat temperature generally between 80-100℃. The quality is low and it is difficult to utilize effectively.

[0005] However, there is currently no energy allocation scheme for hydrogen production coupled with water desalination using wind and solar power. Summary of the Invention

[0006] To address the aforementioned issues, this disclosure provides a clean power source hydrogen production coupled with a water desalination system and its power configuration method. By optimizing the configuration ratio of clean power source and hydrogen production power, the system utilizes the wasted electricity and waste heat from wind and solar hydrogen production, while simultaneously eliminating the pressure on the freshwater supply of the hydrogen production system.

[0007] In a first aspect, this disclosure provides a clean power source hydrogen production coupled with water desalination system, including a clean power source, a power grid, a hydrogen production device, an electric heater, a heat storage tank, a desalination device, and a control device; Clean power is connected to the power grid through grid-connected equipment and provides power to the hydrogen production unit and electric heater; among which, clean power is given priority to the hydrogen production unit. The hydrogen production unit is used to electrolyze fresh water supplied by the desalination unit to produce hydrogen gas; The heat storage tank collects heat from the electric heater and hydrogen production unit, and supplies it to the desalination unit; The control device is used for coordinated control and scheduling among power grids, clean power sources, hydrogen production units, electric heaters, and desalination units.

[0008] Furthermore, Clean energy sources include wind power generation devices and solar power generation devices; Solar power generation devices are either photovoltaic (PV) power generation devices or solar thermal (CSP) power generation devices.

[0009] Furthermore, Hydrogen produced by the hydrogen production unit is injected into the hydrogen network.

[0010] Secondly, this disclosure provides a power configuration method for clean power source hydrogen production coupled with water desalination, including: Establish a clean power priority allocation model; in which clean power is prioritized to meet the power requirements for hydrogen production. Based on the cost of electricity purchase, a state optimization model for thermal storage tanks is established. By jointly solving the clean power priority allocation model and the thermal storage tank state optimization model, the optimal power configuration of the clean power source and the hydrogen production unit is obtained.

[0011] Furthermore, Establish a clean energy priority allocation model, including: Calculate the power of the cleanroom power supply; Calculate the total power required for hydrogen production and electric heating; Based on the clean power supply capacity and total power demand, a clean power supply priority allocation model is created by prioritizing the allocation of clean power to hydrogen production units.

[0012] Furthermore, Wind energy, a clean energy source, is preferentially allocated to hydrogen production units.

[0013] Furthermore, The power difference between wind power and the required power for hydrogen production is supplemented by solar power.

[0014] Furthermore, The difference in power required by wind and solar energy and hydrogen production facilities is supplemented by electricity purchased from the grid.

[0015] Thirdly, based on the same inventive concept, this disclosure also provides a power configuration device for hydrogen production coupled with water desalination using clean power sources, including: a clean power source priority allocation model construction module, a heat storage tank state optimization model construction module, and a joint solution module; A clean power priority allocation model construction module is used to establish a clean power priority allocation model; in which clean power is preferentially provided to hydrogen production units. The thermal storage tank state optimization model construction module is used to establish a thermal storage tank state optimization model based on electricity purchase cost. The joint solution module is used to jointly solve the clean power priority allocation model and the thermal storage tank state optimization model to obtain the optimal power configuration of the clean power source and the hydrogen production unit.

[0016] Fourthly, based on the same inventive concept, this disclosure also provides an electronic device, including at least one processor and at least one storage medium electrically connected; The storage medium is electrically connected to the processor, wherein the storage medium stores instructions executable by at least one of the processors, the instructions being executed by at least one of the processors to enable at least one of the processors to perform the power configuration method for clean power hydrogen production coupled with water desalination as described above.

[0017] Fifthly, based on the same inventive concept, this disclosure also provides a computer storage medium storing a computer program; When the computer program is executed by the processor, it implements the power configuration method for clean power hydrogen production coupled with water desalination as described above.

[0018] Sixthly, based on the same inventive concept, this disclosure also provides a computer program product, which is stored in at least one storage medium; The computer program product includes several instructions for causing at least one electronic device to perform the power configuration method for clean power hydrogen production coupled with water desalination as described above.

[0019] Compared with the prior art, this disclosure provides a clean power source hydrogen production coupled with water desalination system and its power configuration method, which has the following beneficial effects: 1. By controlling the power output of wind and solar power to hydrogen production, the configuration ratio of wind and solar power is optimized, thereby improving the effective utilization rate of wind and solar power and reducing power curtailment. 2. Increased the annual effective utilization hours of hydrogen production equipment and reduced the unit cost of hydrogen production; 3. It enables the collection and utilization of low-grade heat generated during the hydrogen production process, thereby improving energy utilization efficiency; 4. It has achieved effective utilization of seawater / saline water / brackish water, with significant ecological value.

[0020] Other features and advantages of this disclosure will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the disclosure. The objects and other advantages of this disclosure may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this disclosure 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 this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of a clean power source hydrogen production coupled with water desalination system according to an embodiment of the present disclosure is shown. Figure 2 A schematic flowchart of a power configuration method for clean power source hydrogen production coupled with water desalination according to an embodiment of the present disclosure is shown. Figure 3 A schematic diagram illustrating the structural principle of an electronic device according to an embodiment of the present disclosure is shown.

[0023] Explanation of reference numerals in the attached figures: 11-Wind power generation device, 12-Solar power generation device, 21-Power grid, 31-Hydrogen production device, 41-Hydrogen grid, 51-Electric heater, 52-Heat storage tank, 61-Desalination device, 71-Seawater / saline / brackish water supply device, 81-Control device. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0025] Hydrogen production via water electrolysis is one of the main technologies for addressing the rigid constraints of intermittency, fluctuation, and instability in wind and solar power generation. It is also a key technology for realizing the consumption of clean electricity from wind and solar power and the production of green hydrogen. Optimizing the configuration of clean power sources and hydrogen production equipment power is the focus of the following embodiments of this disclosure.

[0026] The efficiency of hydrogen production by water electrolysis is generally 50-60%, with the remaining energy consumption being low-grade heat loss. Collecting this waste heat for use as a heat source for seawater or brackish water desalination can improve the overall energy utilization efficiency of the system.

[0027] Figure 1 A structural schematic diagram of a clean power source hydrogen production coupled with water desalination system according to an embodiment of the present disclosure is shown.

[0028] This embodiment of a clean power source hydrogen production coupled with water desalination system includes a clean power source, a power grid 21, a hydrogen production device 31, an electric heater 51, a heat storage tank 52, a desalination device 61, and a control device 81. The clean power source is connected to the power grid 21 through grid-connected equipment and provides power to the hydrogen production device 31 and the electric heater 51. The hydrogen production device 31 is used to electrolyze the fresh water provided by the desalination device 61 to produce hydrogen. The heat storage tank 52 collects the heat from the electric heater 51 and the hydrogen production device 31 and provides it to the desalination device 61. The control device 81 is used for the coordinated control and scheduling among the power grid 21, the clean power source, the hydrogen production device 31, the electric heater 51, and the desalination device 61.

[0029] The clean power source preferably includes a wind power generation device 11 and a solar power generation device 12. The wind power generation device 11 is an onshore wind power generation device or an offshore wind power generation device, and the solar power generation device 12 is a photovoltaic power generation device or a solar thermal power generation device. Specifically, when the power generated by the clean power source is sufficient to meet the power requirements of the hydrogen production device 31 and the electric heater 51, the clean power source provides power to the power grid 21, the hydrogen production device 31, and the electric heater 51; when the clean power source cannot meet the power requirements of the hydrogen production device 31 and the electric heater 51, the clean power source and the power grid 21 jointly provide power to the hydrogen production device 31 and the electric heater 51.

[0030] The hydrogen production device 31 is at least one of an alkaline water electrolysis hydrogen production device, a proton exchange membrane water electrolysis hydrogen production device, and a solid oxide water electrolysis hydrogen production device. It electrolyzes the fresh water provided by the desalination device 61 to produce hydrogen and injects the produced hydrogen into the hydrogen network 41 for hydrogen energy transportation.

[0031] The heat energy sources for the heat storage tank 52 include direct heating by a high-power electric heater 51, or extraction of waste heat from the electrolyzer of the low-grade hydrogen production unit via a heat exchanger / heat pump. Specifically, the heat energy generated by the electric heater 51 and the waste heat generated by the hydrogen production unit 31 are collected and stored in the heat storage tank 52, and the heat energy is provided to the desalination unit 61 for water desalination.

[0032] The desalination device 61 is preferably a reverse osmosis membrane or a steam condenser. It uses the heat energy provided by the heat storage tank 52 to desalinate the seawater, saline water or brackish water provided by the seawater / saline water / brackish water supply device 71. The desalinated fresh water is then supplied to the hydrogen production device 31, and the desalinated concentrated seawater / saline water is discharged into the seawater / saline water / brackish water supply device 71.

[0033] In the above-mentioned clean power hydrogen production coupled water desalination system, if the clean power (wind and solar) and hydrogen production installed capacity are configured in a 1:1 ratio, the wind and solar power can be fully utilized, but the annual utilization hours of the hydrogen production equipment are low and the economic efficiency is poor.

[0034] like Figure 2 As shown, based on the above embodiments, this disclosure provides a power configuration method for clean power source hydrogen production coupled with water desalination, including the following steps: S1, Establish a clean power priority allocation model.

[0035] S11, calculate the power of the clean power supply.

[0036] , in, To clean the power supply; Real-time wind power generation (kW); This represents the real-time power generation of solar energy (kW).

[0037] S12, calculate the total power required for hydrogen production and electric heating.

[0038] , in, Total power demand; Power required for the hydrogen production unit (kW); The required power (kW) for the electric heater.

[0039] The power required by the electric heater corresponds to the amount of fresh water needed to produce hydrogen. The amount of fresh water needed for hydrogen production is the total fresh water generated by the heat from the heat storage tank, including the fresh water generated by the heat from the electric heater and the waste heat from hydrogen production.

[0040] S13, create a clean power priority allocation model based on clean power supply power and total power demand.

[0041] S131. Clean power sources should be prioritized to meet the power requirements of the hydrogen production unit.

[0042] Priority will be given to allocating wind power to hydrogen production units. The power difference between wind power and the hydrogen production units will be supplemented by solar power. The power difference between wind power, solar power and the hydrogen production units will be supplemented by electricity purchased from the power grid.

[0043] , in, The power (kW) generated by wind energy for hydrogen production; The power (kW) generated by solar energy for hydrogen production; The power (kW) used by the power grid for hydrogen production.

[0044] S132. The remaining clean power supply is allocated to the electric heater, and the difference between the remaining clean power supply and the power required by the electric heater is supplemented by electricity purchased from the grid.

[0045] , in, Power (kW) of solar energy used in electric heaters; The power (kW) used by the power grid for electric heaters.

[0046] S2. Based on the cost of electricity purchase, establish a state optimization model for the thermal storage tank.

[0047] When clean energy exceeds the power required for hydrogen production and electric heating, it is preferentially stored in the thermal storage tank via electric heaters. When electricity prices are low, electricity is purchased to store thermal energy (stored in the thermal storage tank via electric heaters), and when electricity prices are high, the thermal storage tank is used for heating to minimize the purchase of electricity from the grid.

[0048] , in, The current thermal storage status of the thermal storage tank (kWh); For electrothermal conversion efficiency; Power (kW) of wind energy used in electric heaters; Waste heat from hydrogen production; To improve the efficiency of waste heat recovery in hydrogen production; The desalination device consumes heat; This refers to the electric heating time; T For power supply cycles; for t The grid electricity price at any given time (RMB / kWh).

[0049] S3, jointly solve the clean power priority allocation model and the thermal storage tank state optimization model to obtain the optimal power configuration of clean power and hydrogen production unit.

[0050] The solution to the clean power priority allocation model and the thermal storage tank state optimization model is divided into several actual operating conditions (i.e., preconditions). This disclosure uses the following operating condition as an example to illustrate the solution process.

[0051] Assumption: The installed capacity of clean energy is large enough, P H2demand +P heaterdemand >P renew And there is no wind. Therefore, the joint equations are as follows: This formula corresponds to S131 under the assumed operating condition; This formula corresponds to S132 under the assumed operating condition; This formula corresponds to S2 under the assumed operating condition.

[0052] The following derivation can be made from the above equations: , , , Ultimately obtained P renew and P H2demand Formula for logical relationship between them: .

[0053] Solve for P under all operating conditions renew and P H2demand The logical relationship formula between them was optimized using multiple parameters based on "highest clean energy consumption rate and largest annual utilization hours of hydrogen production equipment," taking into account the local clean energy constraints of the project area, to obtain P. renew and P H2demand The optimal configuration ratio and capacity.

[0054] Based on the same inventive concept as the above-disclosed content, this disclosure also provides a power configuration system for clean power hydrogen production coupled with water desalination, including a clean power priority allocation model construction module, a heat storage tank state optimization model construction module, and a joint solution module; The Clean Power Priority Allocation Model Construction Module is used to establish a clean power priority allocation model based on the power requirements of hydrogen production and electric heating. The thermal storage tank state optimization model construction module is used to establish a thermal storage tank state optimization model based on electricity purchase cost. The joint solution module is used to jointly solve the clean power priority allocation model and the thermal storage tank state optimization model to obtain the optimal power configuration of the clean power source and the hydrogen production unit.

[0055] Based on the same inventive concept as the above-disclosed content, this disclosure also provides an electronic device. For example... Figure 3 As shown, the electronic device of this disclosure includes at least one processor and at least one storage medium electrically connected to the processor. The storage medium is electrically connected to the processor, wherein the storage medium stores instructions executable by the at least one processor, which are executed by the at least one processor to enable the at least one processor to perform the clean power hydrogen production coupled water desalination method as described above.

[0056] It should be noted that the electrical connection between the above-mentioned units does not necessarily mean the connection between lines. The indirect connection method can be applied to the embodiments of this disclosure as long as it achieves the purpose of this disclosure.

[0057] Based on the same inventive concept, this disclosure also provides a computer storage medium storing a computer program, which, when executed by a processor, implements the clean power source hydrogen production coupled with water desalination method as described above.

[0058] Based on the same inventive concept, this disclosure also provides a computer program product stored in at least one storage medium; the computer program product includes several instructions for causing at least one computer device to execute the clean power hydrogen production coupled water desalination method as described above.

[0059] Although the present disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A clean power source hydrogen production coupled with water desalination system, characterized in that, This includes clean power sources, power grids, hydrogen production units, electric heaters, thermal storage tanks, desalination units, and control devices; Clean power is connected to the power grid through grid-connected equipment and provides power to the hydrogen production unit and electric heater; among which, clean power is given priority to the hydrogen production unit. The hydrogen production unit is used to electrolyze fresh water supplied by the desalination unit to produce hydrogen gas; The heat storage tank collects heat from the electric heater and hydrogen production unit, and supplies it to the desalination unit; The control device is used for coordinated control and scheduling among power grids, clean power sources, hydrogen production units, electric heaters, and desalination units.

2. The system according to claim 1, characterized in that, Clean energy sources include wind power generation devices and solar power generation devices; Solar power generation devices are either photovoltaic (PV) power generation devices or solar thermal (CSP) power generation devices.

3. The system according to claim 1 or 2, characterized in that, Hydrogen produced by the hydrogen production unit is injected into the hydrogen network.

4. A power configuration method for clean power source hydrogen production coupled with water desalination, applicable to the system described in any one of claims 1-3, characterized in that, The method includes: Establish a clean power priority allocation model; in which clean power is prioritized to meet the power requirements for hydrogen production. Based on the cost of electricity purchase, a state optimization model for thermal storage tanks is established. By jointly solving the clean power priority allocation model and the thermal storage tank state optimization model, the optimal power configuration of the clean power source and the hydrogen production unit is obtained.

5. The method according to claim 4, characterized in that, Establish a clean energy priority allocation model, including: Calculate the power of the cleanroom power supply; Calculate the total power required for hydrogen production and electric heating; Based on the clean power supply capacity and total power demand, a clean power supply priority allocation model is created by prioritizing the allocation of clean power to hydrogen production units.

6. The method according to claim 4 or 5, characterized in that, Wind energy, a clean energy source, is preferentially allocated to hydrogen production units.

7. The method according to claim 6, characterized in that, The power difference between wind power and the required power for hydrogen production is supplemented by solar power.

8. The method according to claim 7, characterized in that, The difference in power required by wind and solar energy and hydrogen production facilities is supplemented by electricity purchased from the grid.

9. A power configuration device for clean power source hydrogen production coupled with water desalination, used to perform the method according to any one of claims 4-8, characterized in that, The device includes a clean power priority allocation model construction module, a thermal storage tank state optimization model construction module, and a joint solution module; The Clean Power Priority Allocation Model Building Module is used to establish a clean power priority allocation model. The thermal storage tank state optimization model construction module is used to establish a thermal storage tank state optimization model based on electricity purchase cost. The joint solution module is used to jointly solve the clean power priority allocation model and the thermal storage tank state optimization model to obtain the optimal power configuration of the clean power source and the hydrogen production unit.

10. An electronic device, characterized in that, Includes at least one processor and at least one storage medium electrically connected; The storage medium is electrically connected to the processor, wherein the storage medium stores instructions executable by at least one of the processors, the instructions being executed by at least one of the processors to enable at least one of the processors to perform the power configuration method for clean power hydrogen production coupled with water desalination as described in any one of claims 4-8.

11. A computer storage medium, characterized in that, The computer storage medium stores a computer program. When the computer program is executed by the processor, it implements the power configuration method for clean power source hydrogen production coupled with water desalination as described in any one of claims 4-8.

12. A computer program product, characterized in that, The computer program product is stored in at least one storage medium; The computer program product includes several instructions for causing at least one electronic device to execute the power configuration method for clean power hydrogen production coupled with water desalination as described in any one of claims 4-8.

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