Temperature control method, device, system and equipment for electrolytic cell and storage medium
By calculating the theoretical and measured changes in the inlet temperature of the electrolyzer and adjusting the opening of the cooling water valve, the problem of inaccurate temperature control of the electrolyzer was solved, and precise temperature control of the electrolyzer and improvement of hydrogen production efficiency were achieved.
Patent Information
- Application Number
- CN202411075679.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2026-02-10
AI Technical Summary
In existing technologies, the temperature control of electrolyzers is prone to large fluctuations, leading to reduced electrolysis efficiency and safety hazards. This is especially true in large-scale multi-to-one water electrolysis hydrogen production lines, where excessively high temperatures can pose even greater safety risks.
By acquiring the current and historical operating current values of the electrolyzer, calculating the theoretical change value of the inlet temperature, and combining the target value and measured value of the inlet temperature, the opening degree of the cold water valve is adjusted to control the temperature of the electrolyzer, thereby achieving rapid response and precise regulation.
This improved the accuracy of electrolyzer temperature control, maintaining the temperature within the optimal hydrogen production range, thereby increasing hydrogen production efficiency and reducing safety risks.
Smart Images
Figure CN121496476A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of water electrolysis for hydrogen production, and in particular to a method, apparatus, system, equipment, and storage medium for temperature control of an electrolyzer. Background Technology
[0002] In the process of hydrogen production through water electrolysis, as electrical energy is consumed, 20% to 30% of the energy is converted into heat and released into the electrolyte in the electrolyzer, causing the electrolysis temperature to rise continuously. This temperature increase can reduce the lifespan of the hydrogen production system and may even lead to safety accidents. When using renewable energy to produce green hydrogen, the uncertain and fluctuating nature of renewable energy sources causes the current input to the hydrogen production system to change continuously, resulting in greater fluctuations in the electrolyzer temperature. Therefore, to maintain stable operation of the electrolyzer, temperature control is necessary.
[0003] Traditional temperature control methods primarily rely on PID control to regulate the cooling water flow rate in the heat exchanger, thereby controlling the electrolyzer temperature. During this process, the alkali circulation pump flow rate must remain constant. However, electrolyzer temperature control is a process with significant inertia and time delay. This method is highly susceptible to large temperature fluctuations, leading to deviations in temperature control and reduced electrolysis efficiency. This is especially problematic in large-scale, multi-to-one water electrolysis hydrogen production lines, where excessively high electrolyzer temperatures can pose significant safety hazards. Summary of the Invention
[0004] The purpose of this invention is to provide a temperature control method for an electrolytic cell, in order to solve the technical problem that the existing method of adjusting the temperature of an electrolytic cell by PID control is prone to large temperature fluctuations, resulting in deviations in the temperature control of the electrolytic cell.
[0005] To address the aforementioned technical problem of potential deviations in electrolytic cell temperature control, embodiments of this application provide a method, apparatus, system, equipment, and storage medium for temperature control of an electrolytic cell, including:
[0006] In a first aspect, embodiments of this application provide a method for temperature control of an electrolytic cell, the method comprising:
[0007] Obtain the current operating current value of the electrolytic cell in the current cycle and the historical operating current value of the electrolytic cell in the previous cycle;
[0008] Based on the current operating current value and the historical operating current value, determine the theoretical change in the inlet temperature of the electrolytic cell compared to the previous cycle;
[0009] Based on the theoretical change value of the inlet temperature of the electrolytic cell and the target value of the inlet temperature of the electrolytic cell in the previous cycle, the target value of the inlet temperature of the electrolytic cell in the current cycle is determined.
[0010] Adjust the opening degree of the cold water valve based on the target value of the electrolytic cell inlet temperature for the current cycle and the measured value of the electrolytic cell inlet temperature for the current cycle.
[0011] Optionally, based on the current operating current value and the historical operating current value, the theoretical change in the inlet temperature of the electrolytic cell compared to the previous cycle is determined, including:
[0012] Obtain the current operating voltage value of the electrolysis cell in the current cycle and the historical operating voltage value of the electrolysis cell in the previous cycle;
[0013] Obtain the current measured outlet temperature of the electrolyzer in the current cycle and the historical measured outlet temperature of the electrolyzer in the previous cycle;
[0014] The current heat generation rate of the electrolysis current is determined based on the current operating current value and the current operating voltage value.
[0015] The historical heat generation rate of the electrolysis current is determined based on the historical operating current value and the historical operating voltage value.
[0016] The current heat dissipation rate of the electrolytic cell is determined based on the measured current outlet temperature and the pre-determined ambient temperature.
[0017] The historical heat dissipation rate of the electrolytic cell is determined based on the measured historical outlet temperature and the pre-determined ambient temperature.
[0018] The theoretical change in the inlet temperature of the electrolytic cell is determined based on the current heat generation rate, the historical heat generation rate, the current heat dissipation rate, the historical heat dissipation rate, and the preset alkaline parameters; wherein the preset alkaline parameters include, but are not limited to, the alkaline flow rate, the alkaline density, and the alkaline heat capacity in each cycle.
[0019] Optionally, the heat dissipation rate of the electrolytic cell in the current cycle is obtained by the following formula:
[0020]
[0021] in, It is the heat dissipation rate of the electrolytic cell during the current cycle; This is the current cycle's electrolytic cell outlet temperature value; T atm R is the preset ambient temperature value; R is the thermal resistance of the electrolytic cell;
[0022] The heat dissipation rate of the electrolytic cell in the previous cycle is obtained by the following formula:
[0023]
[0024] in, It is the heat dissipation rate of the electrolytic cell in the previous cycle; This is the electrolytic cell outlet temperature value from the previous cycle; T atm R is the preset ambient temperature value; R is the thermal resistance of the electrolytic cell.
[0025] The current heat production rate is obtained using the following formula:
[0026]
[0027] in, It is the current heat generation rate; N is the number of electrolytic cells in the electrolytic cell; U k This is the current operating voltage value; U th It is the thermal neutral voltage value; I k This is the current operating current value;
[0028] The historical heat production rate is obtained using the following formula:
[0029]
[0030] in, It is the historical heat generation rate; N is the number of electrolytic cells in the electrolytic cell; U k-1 This refers to the historical operating voltage value; U th It is the thermal neutral voltage value; I k-1 This refers to the historical operating current value.
[0031] Optionally, the method further includes:
[0032] When the current cycle is the first cycle, the target value of the electrolytic cell inlet temperature for the current cycle is determined based on the theoretical change value of the electrolytic cell inlet temperature and the preset initial target value of the electrolytic cell inlet temperature.
[0033] Secondly, embodiments of this application provide a temperature control device for an electrolytic cell, the device comprising:
[0034] The acquisition unit is used to acquire the current operating current value of the electrolytic cell in the current cycle and the historical operating current value of the electrolytic cell in the previous cycle.
[0035] The processing unit is configured to determine the theoretical change in the inlet temperature of the electrolytic cell compared to the previous cycle based on the current operating current value and the historical operating current value; and to determine the target value of the inlet temperature of the electrolytic cell for the current cycle based on the theoretical change in the inlet temperature of the electrolytic cell and the target value of the inlet temperature of the electrolytic cell for the previous cycle.
[0036] The regulating unit is used to adjust the opening degree of the cold water valve according to the target value of the electrolytic cell inlet temperature in the current cycle and the measured value of the electrolytic cell inlet temperature in the current cycle.
[0037] Optionally, the acquisition unit is further configured to:
[0038] Obtain the current operating voltage value of the electrolysis cell in the current cycle and the historical operating voltage value of the electrolysis cell in the previous cycle; and obtain the current measured value of the electrolytic cell's outlet temperature in the current cycle and the historical measured value of the electrolytic cell's outlet temperature in the previous cycle.
[0039] The processing unit is used for:
[0040] The following methods are used to determine the current heat generation rate of the electrolytic current based on the current operating current and voltage values: the historical heat generation rate of the electrolytic current based on the historical operating current and voltage values; the current heat dissipation rate of the electrolytic cell based on the measured current outlet temperature and the pre-measured ambient temperature; the historical heat dissipation rate of the electrolytic cell based on the measured historical outlet temperature and the pre-measured ambient temperature; and the theoretical change in the inlet temperature of the electrolytic cell based on the current heat generation rate, the historical heat generation rate, the current heat dissipation rate, the historical heat dissipation rate, and preset alkali parameters. The preset alkali parameters include, but are not limited to, alkali flow rate, alkali density, and alkali heat capacity in each cycle.
[0041] Optionally, the heat dissipation rate of the electrolytic cell in the current cycle is obtained by the following formula:
[0042]
[0043] in, It is the heat dissipation rate of the electrolytic cell during the current cycle; This is the current cycle's electrolytic cell outlet temperature value; T atm R is the preset ambient temperature value; R is the thermal resistance of the electrolytic cell;
[0044] The heat dissipation rate of the electrolytic cell in the previous cycle is obtained by the following formula:
[0045]
[0046] in, It is the heat dissipation rate of the electrolytic cell in the previous cycle; This is the electrolytic cell outlet temperature value from the previous cycle; T atm R is the preset ambient temperature value; R is the thermal resistance of the electrolytic cell.
[0047] The current heat production rate is obtained using the following formula:
[0048]
[0049] in, It is the current heat generation rate; N is the number of electrolytic cells in the electrolytic cell; U k This is the current operating voltage value; U th It is the thermal neutral voltage value; I k This is the current operating current value;
[0050] The historical heat production rate is obtained using the following formula:
[0051]
[0052] in, It is the historical heat generation rate; N is the number of electrolytic cells in the electrolytic cell; U k-1 This refers to the historical operating voltage value; U th It is the thermal neutral voltage value; I k-1 This refers to the historical operating current value.
[0053] Optionally, the processing unit is further configured to:
[0054] When the current cycle is the first cycle, the target value of the electrolytic cell inlet temperature for the current cycle is determined based on the theoretical change value of the electrolytic cell inlet temperature and the preset initial target value of the electrolytic cell inlet temperature.
[0055] Thirdly, embodiments of this application provide a temperature control system for an electrolytic cell, the system comprising:
[0056] An electrolytic cell, a gas-liquid separator, a heat exchanger, a temperature sensor, a cold water valve, instrumentation equipment, and a control device; the control device is connected to the temperature sensor, the instrumentation equipment, and the cold water valve, respectively.
[0057] The control device is used to execute the temperature control method for the electrolytic cell as described above.
[0058] Fourthly, embodiments of this application provide a computer device, including:
[0059] The system includes a memory and a processor, which are interconnected. The memory stores computer instructions, and the processor executes these computer instructions to perform the temperature control method for the electrolytic cell described above.
[0060] Fifthly, embodiments of this application provide a computer-readable storage medium storing computer instructions for causing a computer to execute the temperature control method for an electrolytic cell described above.
[0061] Compared with existing technologies, this application provides a temperature control method for an electrolyzer. Based on the operating current value of the electrolyzer in the current cycle and the operating current value in the previous cycle, the theoretical change in the inlet temperature of the electrolyzer compared to the previous cycle is determined. Then, combined with the target inlet temperature value of the previous cycle, the target inlet temperature value of the electrolyzer for the current cycle is determined. Finally, combined with the measured inlet temperature value of the current cycle, the opening of the cooling water valve is adjusted. Compared with conventional PID feedback control systems, this scheme recalculates the target inlet temperature value of the electrolyzer within each cycle based on the change in current. This allows for rapid changes in the opening of the cooling water flow valve, reducing the error between the process value and the target value of the alkaline solution temperature at the inlet of the electrolyzer. This results in more accurate control of the alkaline solution temperature at the outlet of the electrolyzer, maintaining the temperature at the optimal hydrogen production temperature and improving hydrogen production efficiency. Attached Figure Description
[0062] Figure 1 This application provides a schematic diagram of the temperature control process for a water electrolysis hydrogen production system;
[0063] Figure 2 This is a schematic flowchart of a temperature control method for an electrolytic cell provided in an embodiment of this application.
[0064] Figure 3 This is a flowchart illustrating a method for determining the theoretical change value of inlet temperature provided in an embodiment of this application.
[0065] Figure 4 This is a schematic diagram of the structure of a temperature control device for an electrolytic cell provided in an embodiment of this application.
[0066] The reference numerals in the attached figures are explained as follows:
[0067] 11-First temperature sensor; 12-Second temperature sensor; 21-Cooling water flow valve; 31-Current meter; 32-Voltage meter. Detailed Implementation
[0068] To make the objectives, advantages, and features of the present invention clearer, the method proposed by the present invention will be further described in detail below with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clearly illustrate the objectives of the embodiments of the present invention.
[0069] To facilitate understanding of the present invention, the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments.
[0070] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.
[0071] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.
[0072] In the description of this application and the appended claims, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0073] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.
[0074] Figure 1 This application provides a schematic diagram of the temperature control process for a water electrolysis hydrogen production system. The hydrogen production system includes a heat exchanger, an electrolyzer, and a gas-liquid separator. The outlet end of the electrolyzer is connected to the gas-liquid separator, and the inlet end of the electrolyzer is connected to the heat exchanger.
[0075] It should be noted that the "alkali solution" described in the embodiments of this application can also be described as "electrolyte", "alkaline solution", etc. That is to say, the "alkali solution" described in the embodiments of this application can be an electrolyte used to produce hydrogen in a hydrogen production system.
[0076] The first temperature sensor 11 is used to collect the outlet temperature of the electrolytic cell, that is, the temperature of the alkaline solution at the outlet of the electrolytic cell; the second temperature sensor 12 is used to collect the inlet temperature of the electrolytic cell, that is, the temperature of the alkaline solution at the inlet of the electrolytic cell.
[0077] The cooling water valve 21 is used to regulate the flow rate of cooling water entering the heat exchanger. The valve opening of the cooling water valve 21 is what this application aims to regulate.
[0078] The current meter 31 is used to display the operating current value of the electrolytic cell; the voltage meter 32 is used to display the operating voltage value of the electrolytic cell.
[0079] based on Figure 1 The flowchart shown is as follows: Figure 2 An exemplary flowchart of a temperature control method for an electrolytic cell provided in an embodiment of this application is shown, which specifically includes the following steps:
[0080] Step 11: Obtain the current operating current value of the electrolytic cell in the current cycle and the historical operating current value of the electrolytic cell in the previous cycle.
[0081] Step 12: Based on the current operating current value and the historical operating current value, determine the theoretical change in the inlet temperature of the electrolytic cell compared to the previous cycle.
[0082] Step 13: Determine the target value of the inlet temperature of the electrolytic cell for the current cycle based on the theoretical change value of the inlet temperature of the electrolytic cell and the target value of the inlet temperature of the electrolytic cell in the previous cycle.
[0083] Step 14: Adjust the opening of the cold water valve according to the target value of the electrolytic cell inlet temperature for the current cycle and the measured value of the electrolytic cell inlet temperature for the current cycle.
[0084] Compared to conventional PID feedback control systems, this scheme recalculates the target value of the electrolyzer inlet temperature within each cycle based on the change in current. This causes the valve opening of the cooling water flow valve to change rapidly, reducing the error between the process value of the alkaline solution temperature at the electrolyzer inlet and its target value. This makes the control of the alkaline solution temperature at the electrolyzer outlet more accurate, maintaining the temperature at the optimal hydrogen production temperature and improving hydrogen production efficiency.
[0085] In step 12, there are several ways to determine the theoretical change in inlet temperature. One example can be found by referring to... Figure 3 The example illustrates a flowchart of a method for determining the theoretical change value of inlet temperature provided in an embodiment of this application, which specifically includes the following steps:
[0086] Step 121: Obtain the current operating voltage value of the electrolysis cell in the current cycle and the historical operating voltage value of the electrolysis cell in the previous cycle.
[0087] An electrolytic cell consists of multiple electrolysis chambers, and the operating voltage value of each electrolysis chamber can be obtained by measuring instruments such as pressure gauges.
[0088] Step 122: Obtain the current measured value of the electrolytic cell's outlet temperature in the current cycle and the historical measured value of the electrolytic cell's outlet temperature in the previous cycle.
[0089] Step 123: Determine the current heat generation rate of the electrolysis current based on the current operating current value and the current operating voltage value.
[0090] The current heat generation rate can be obtained by the following formula (1):
[0091]
[0092] in, U is the current heat generation rate; N is the number of electrolytic cells in the electrolytic cell; U k This is the current operating voltage value; U th It is the thermal neutral voltage value; I k This is the current operating current value.
[0093] Step 124: Determine the historical heat generation rate of the electrolysis current based on the historical operating current value and the historical operating voltage value.
[0094] The historical heat production rate can be determined using the following formula (2):
[0095]
[0096] in, It is the historical heat generation rate; N is the number of electrolytic cells in the electrolytic cell; U k-1 This is the historical operating voltage value; U th It is the thermal neutral voltage value; I k-1 This is the historical operating current value.
[0097] Step 125: Determine the current heat dissipation rate of the electrolytic cell based on the measured current outlet temperature and the pre-determined ambient temperature.
[0098] The current heat dissipation rate can be obtained by the following formula (3):
[0099]
[0100] in, This is the current heat dissipation rate; This is the current measured outlet temperature; T atm R is the pre-measured ambient temperature value; R is the thermal resistance of the electrolytic cell.
[0101] Step 126: Determine the historical heat dissipation rate of the electrolytic cell based on the historical measured outlet temperature and the pre-determined ambient temperature.
[0102] The historical heat dissipation rate can be determined using the following formula (4):
[0103]
[0104] in, This is the historical heat dissipation rate; These are historical measured export temperatures; T atm R is the pre-measured ambient temperature value; R is the thermal resistance of the electrolytic cell.
[0105] Step 127: Determine the theoretical change value of the inlet temperature of the electrolytic cell based on the current heat generation rate, historical heat generation rate, current heat dissipation rate, historical heat dissipation rate and preset alkali parameter values.
[0106] In this embodiment, the preset alkaline solution parameter values include, but are not limited to, alkaline solution density, alkaline solution heat capacity, and measured alkaline solution flow rate for each cycle.
[0107] Based on the current heat generation rate, current heat dissipation rate, and preset alkali parameters, determine the theoretical value of the current inlet temperature of the electrolyzer in the current cycle; based on the historical heat generation rate, historical heat dissipation rate, and preset alkali parameters, determine the theoretical value of the historical inlet temperature of the electrolyzer in the historical cycle.
[0108] The theoretical change in the inlet temperature of the electrolytic cell can be determined by the difference between the current theoretical inlet temperature and the historical theoretical inlet temperature.
[0109] Specifically, the theoretical value of the current inlet temperature can be determined by the following formula (5):
[0110]
[0111] in, This is the theoretical value of the current inlet temperature; This is the current heat production rate; This is the current heat dissipation rate; c lye It is the heat capacity value of the alkaline solution; ρ lye This is the density value of the alkaline solution; This is the measured value of the alkali flow rate for the current cycle.
[0112] The theoretical value of the historical inlet temperature can be determined by the following formula (6):
[0113]
[0114] in, This is the theoretical value of the historical inlet temperature; It is the historical heat production rate; It is the historical heat dissipation rate; c lye It is the heat capacity value of the alkaline solution; ρ lye This is the density value of the alkaline solution; These are the measured values of alkali flow rate over historical periods.
[0115] The theoretical change in the inlet temperature of the electrolytic cell can be obtained by the following formula (7):
[0116]
[0117] Where, ΔT th This is the theoretical change in the inlet temperature of the electrolytic cell; This is the theoretical value of the current inlet temperature; It is the theoretical value of the historical inlet temperature.
[0118] Using the above methods, based on the current and historical operating current values, and combined with the heat transfer formula, the heat generated by the current in the current cycle and the heat generated by the current in the previous cycle can be calculated. Then, based on the law of conservation of energy, the theoretical change in the inlet temperature of the electrolytic cell compared to the previous cycle can be calculated.
[0119] In step 13, the target value of the current inlet temperature of the electrolytic cell for the current cycle can be obtained by the following formula (8):
[0120]
[0121] in, This is the target value for the current inlet temperature of the electrolytic cell in the current cycle; It is the historical inlet temperature target value of the electrolyzer in the previous cycle; ΔT th This is the theoretical change in the inlet temperature of the electrolytic cell.
[0122] Considering that the target value of the electrolytic cell inlet temperature for each cycle is determined based on the target value of the electrolytic cell inlet temperature for the previous cycle, when the current cycle is the first cycle, the target value of the electrolytic cell inlet temperature for the previous cycle has not been calculated using the above method. Therefore, an initial target value of the electrolytic cell inlet temperature can be preset at this time. The current target value of the inlet temperature can be determined based on the theoretical change value of the inlet temperature of the electrolytic cell and the preset initial target value of the electrolytic cell inlet temperature.
[0123] like Figure 4 The diagram shown is a structural schematic of a temperature control device for an electrolytic cell provided in an embodiment of this application. The device includes an acquisition unit 201, a processing unit 202, and an adjustment unit 203. The device includes:
[0124] The acquisition unit 201 is used to acquire the current operating current value of the electrolytic cell in the current cycle and the historical operating current value of the electrolytic cell in the previous cycle.
[0125] The processing unit 202 is configured to determine the theoretical change in the inlet temperature of the electrolytic cell compared to the previous cycle based on the current operating current value and the historical operating current value; and to determine the target value of the inlet temperature of the electrolytic cell for the current cycle based on the theoretical change in the inlet temperature of the electrolytic cell and the target value of the inlet temperature of the electrolytic cell for the previous cycle.
[0126] The regulating unit 203 is used to adjust the opening degree of the cold water valve according to the target value of the electrolytic cell inlet temperature in the current cycle and the measured value of the electrolytic cell inlet temperature in the current cycle.
[0127] Optionally, the acquisition unit 201 is further configured to:
[0128] Obtain the current operating voltage value of the electrolysis cell in the current cycle and the historical operating voltage value of the electrolysis cell in the previous cycle; and obtain the current measured value of the electrolytic cell's outlet temperature in the current cycle and the historical measured value of the electrolytic cell's outlet temperature in the previous cycle.
[0129] The processing unit 202 is used for:
[0130] The following methods are used to determine the current heat generation rate of the electrolytic current based on the current operating current and voltage values: the historical heat generation rate of the electrolytic current based on the historical operating current and voltage values; the current heat dissipation rate of the electrolytic cell based on the measured current outlet temperature and the pre-measured ambient temperature; the historical heat dissipation rate of the electrolytic cell based on the measured historical outlet temperature and the pre-measured ambient temperature; and the theoretical change in the inlet temperature of the electrolytic cell based on the current heat generation rate, the historical heat generation rate, the current heat dissipation rate, the historical heat dissipation rate, and preset alkali parameters. The preset alkali parameters include, but are not limited to, alkali flow rate, alkali density, and alkali heat capacity in each cycle.
[0131] Optionally, the heat dissipation rate of the electrolytic cell in the current cycle is obtained by the following formula:
[0132]
[0133] in, It is the heat dissipation rate of the electrolytic cell during the current cycle; This is the current cycle's electrolytic cell outlet temperature value; T atm R is the preset ambient temperature value; R is the thermal resistance of the electrolytic cell;
[0134] The heat dissipation rate of the electrolytic cell in the previous cycle is obtained by the following formula:
[0135]
[0136] in, It is the heat dissipation rate of the electrolytic cell in the previous cycle; This is the electrolytic cell outlet temperature value from the previous cycle; T atm R is the preset ambient temperature value; R is the thermal resistance of the electrolytic cell.
[0137] The current heat production rate is obtained using the following formula:
[0138]
[0139] in, It is the current heat generation rate; N is the number of electrolytic cells in the electrolytic cell; U k This is the current operating voltage value; U th It is the thermal neutral voltage value; I k This is the current operating current value;
[0140] The historical heat production rate is obtained using the following formula:
[0141]
[0142] in, It is the historical heat generation rate; N is the number of electrolytic cells in the electrolytic cell; U k-1 This refers to the historical operating voltage value; U th It is the thermal neutral voltage value; I k-1 This refers to the historical operating current value.
[0143] Optionally, the processing unit 202 is further configured to:
[0144] When the current cycle is the first cycle, the target value of the electrolytic cell inlet temperature for the current cycle is determined based on the theoretical change value of the electrolytic cell inlet temperature and the preset initial target value of the electrolytic cell inlet temperature.
[0145] This application provides a temperature control system for an electrolytic cell, the system comprising:
[0146] An electrolytic cell, a gas-liquid separator, a heat exchanger, a temperature sensor, a cold water valve, instrumentation equipment, and a control device; the control device is connected to the temperature sensor, the instrumentation equipment, and the cold water valve, respectively.
[0147] The control device is used to execute the temperature control method for the electrolytic cell as described above.
[0148] This application provides a computer device, including:
[0149] The system includes a memory and a processor, which are interconnected. The memory stores computer instructions, and the processor executes these computer instructions to perform the temperature control method for the electrolytic cell described above.
[0150] This application provides a computer-readable storage medium storing computer instructions, which are used to cause a computer to execute the temperature control method for an electrolytic cell described above.
[0151] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.
Claims
1. A method for temperature control of an electrolytic cell, characterized in that, The method includes: Obtain the current operating current value of the electrolytic cell in the current cycle and the historical operating current value of the electrolytic cell in the previous cycle; Based on the current operating current value and the historical operating current value, determine the theoretical change in the inlet temperature of the electrolytic cell compared to the previous cycle; Based on the theoretical change value of the inlet temperature of the electrolytic cell and the target value of the inlet temperature of the electrolytic cell in the previous cycle, the target value of the inlet temperature of the electrolytic cell in the current cycle is determined. Adjust the opening degree of the cold water valve based on the target value of the electrolytic cell inlet temperature for the current cycle and the measured value of the electrolytic cell inlet temperature for the current cycle.
2. The temperature control method according to claim 1, characterized in that, Based on the current operating current value and the historical operating current value, determine the theoretical change in the inlet temperature of the electrolytic cell compared to the previous cycle, including: Obtain the current operating voltage value of the electrolysis cell in the current cycle and the historical operating voltage value of the electrolysis cell in the previous cycle; Obtain the current measured outlet temperature of the electrolyzer in the current cycle and the historical measured outlet temperature of the electrolyzer in the previous cycle; The current heat generation rate of the electrolysis current is determined based on the current operating current value and the current operating voltage value. The historical heat generation rate of the electrolysis current is determined based on the historical operating current value and the historical operating voltage value. The current heat dissipation rate of the electrolytic cell is determined based on the measured current outlet temperature and the pre-determined ambient temperature. The historical heat dissipation rate of the electrolytic cell is determined based on the measured historical outlet temperature and the pre-determined ambient temperature. The theoretical change in the inlet temperature of the electrolytic cell is determined based on the current heat generation rate, the historical heat generation rate, the current heat dissipation rate, the historical heat dissipation rate, and the preset alkaline parameters; wherein the preset alkaline parameters include, but are not limited to, the alkaline flow rate, the alkaline density, and the alkaline heat capacity in each cycle.
3. The temperature control method according to claim 2, characterized in that, The heat dissipation rate of the electrolytic cell in the current cycle is obtained by the following formula: in, It is the heat dissipation rate of the electrolytic cell during the current cycle; This is the current cycle's electrolytic cell outlet temperature value; T atm R is the preset ambient temperature value; R is the thermal resistance of the electrolytic cell; The heat dissipation rate of the electrolytic cell in the previous cycle is obtained by the following formula: in, It is the heat dissipation rate of the electrolytic cell in the previous cycle; This is the electrolytic cell outlet temperature value from the previous cycle; T atm R is the preset ambient temperature value; R is the thermal resistance of the electrolytic cell. The current heat production rate is obtained using the following formula: in, It is the current heat generation rate; N is the number of electrolytic cells in the electrolytic cell; U k This is the current operating voltage value; U th It is the thermal neutral voltage value; I k This is the current operating current value; The historical heat production rate is obtained using the following formula: in, It is the historical heat generation rate; N is the number of electrolytic cells in the electrolytic cell; U k-1 This refers to the historical operating voltage value; U th It is the thermal neutral voltage value; I k-1 This refers to the historical operating current value.
4. The temperature control method according to claim 1, characterized in that, The method further includes: When the current cycle is the first cycle, the target value of the electrolytic cell inlet temperature for the current cycle is determined based on the theoretical change value of the electrolytic cell inlet temperature and the preset initial target value of the electrolytic cell inlet temperature.
5. A temperature control device for an electrolytic cell, characterized in that, The device includes: The acquisition unit is used to acquire the current operating current value of the electrolytic cell in the current cycle and the historical operating current value of the electrolytic cell in the previous cycle. The processing unit is configured to determine the theoretical change in the inlet temperature of the electrolytic cell compared to the previous cycle based on the current operating current value and the historical operating current value; and to determine the target value of the inlet temperature of the electrolytic cell for the current cycle based on the theoretical change in the inlet temperature of the electrolytic cell and the target value of the inlet temperature of the electrolytic cell for the previous cycle. The regulating unit is used to adjust the opening degree of the cold water valve according to the target value of the electrolytic cell inlet temperature in the current cycle and the measured value of the electrolytic cell inlet temperature in the current cycle.
6. The temperature control device according to claim 5, characterized in that, The acquisition unit is also used for: Obtain the current operating voltage value of the electrolysis cell in the current cycle and the historical operating voltage value of the electrolysis cell in the previous cycle; and obtain the current measured value of the electrolytic cell's outlet temperature in the current cycle and the historical measured value of the electrolytic cell's outlet temperature in the previous cycle. The processing unit is used for: The current heat generation rate of the electrolytic current is determined based on the current operating current value and the current operating voltage value; and the historical heat generation rate of the electrolytic current is determined based on the historical operating current value and the historical operating voltage value. Furthermore, based on the measured current outlet temperature and the pre-measured ambient temperature, the current heat dissipation rate of the electrolytic cell is determined; based on the measured historical outlet temperature and the pre-measured ambient temperature, the historical heat dissipation rate of the electrolytic cell is determined; and based on the current heat generation rate, the historical heat generation rate, the current heat dissipation rate, the historical heat dissipation rate, and preset alkali parameter values, the theoretical change value of the inlet temperature of the electrolytic cell is determined; wherein, the preset alkali parameter values include, but are not limited to, the alkali flow rate, the alkali density, and the alkali heat capacity in each cycle.
7. The temperature control device according to claim 6, characterized in that, The heat dissipation rate of the electrolytic cell in the current cycle is obtained by the following formula: in, It is the heat dissipation rate of the electrolytic cell during the current cycle; This is the current cycle's electrolytic cell outlet temperature value; T atm R is the preset ambient temperature value; R is the thermal resistance of the electrolytic cell; The heat dissipation rate of the electrolytic cell in the previous cycle is obtained by the following formula: in, It is the heat dissipation rate of the electrolytic cell in the previous cycle; This is the electrolytic cell outlet temperature value from the previous cycle; T atm R is the preset ambient temperature value; R is the thermal resistance of the electrolytic cell. The current heat production rate is obtained using the following formula: in, It is the current heat generation rate; N is the number of electrolytic cells in the electrolytic cell; U k This is the current operating voltage value; U th It is the thermal neutral voltage value; I k This is the current operating current value; The historical heat production rate is obtained using the following formula: in, It is the historical heat generation rate; N is the number of electrolytic cells in the electrolytic cell; U k-1 This refers to the historical operating voltage value; U th It is the thermal neutral voltage value; I k-1 This refers to the historical operating current value.
8. The temperature control device according to claim 5, characterized in that, The processing unit is also used for: When the current cycle is the first cycle, the target value of the electrolytic cell inlet temperature for the current cycle is determined based on the theoretical change value of the electrolytic cell inlet temperature and the preset initial target value of the electrolytic cell inlet temperature.
9. A temperature control system for an electrolytic cell, characterized in that, The system includes: An electrolytic cell, a gas-liquid separator, a heat exchanger, a temperature sensor, a cold water valve, instrumentation equipment, and a control device; the control device is connected to the temperature sensor, the instrumentation equipment, and the cold water valve, respectively. The control device is used to perform the temperature control method for the electrolytic cell as described in any one of claims 1 to 4.
10. A computer device, characterized in that, include: A memory and a processor are interconnected, the memory storing computer instructions, and the processor executing the computer instructions to perform the temperature control method for the electrolytic cell according to any one of claims 1 to 4.
11. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing a computer to execute the temperature control method for the electrolytic cell according to any one of claims 1 to 4.