Operating method of the recovery device and learned models

Abstract

To provide an operational method for a commercially viable carbon dioxide recovery system.SOLUTION: An operational method for recovery system 1 that collects carbon dioxide includes a CP monitoring step to monitor carbon pricing that is traded according to carbon dioxide emissions, and a changeover step to switch the state of recovery system 1 based on the changeover parameter, the changeover step uses the information from the CP monitoring step as the changeover parameter to switch the state of recovery system 1 to the operation state or the stop state.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an operation method of a recovery device for recovering carbon dioxide and a learned model that outputs an operation period of such a recovery device.

Background Art

[0002] In recent years, it has been desired to implement effective countermeasures to prevent global warming at an early stage. Carbon dioxide in the atmosphere is cited as a greenhouse gas that causes global warming. Carbon dioxide is contained in, for example, exhaust gas emitted when fossil fuels are burned. If such carbon dioxide can be recovered and immobilized, it is possible to suppress global warming. Therefore, technologies related to the recovery of carbon dioxide have been studied (for example, Patent Document 1).

[0003] Patent Document 1 describes a method for reducing carbon dioxide in the atmosphere. In this reduction method, carbon dioxide in the atmosphere is absorbed (reduced) using decarbonated seawater from which carbonic acid contained in surface seawater has been removed.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, the technology described in Patent Document 1 only relates to the absorption of carbon dioxide and does not assume obtaining benefits according to the absorption of carbon dioxide. Therefore, the technology described in Patent Document 1 has room for improvement in terms of commercial use.

[0006] Therefore, technologies related to a recovery device for recovering commercially valuable carbon dioxide are required.

Means for Solving the Problems

[0007] Furthermore, the operating method of the recovery device according to the present invention special The characteristic composition is that carbon dioxide is circulated collect A method for operating a recovery device, The control device A CP monitoring step that monitors carbon pricing, which is traded according to carbon dioxide emissions, The control device A switching step in which the state of the recovery device is switched based on a switching parameter, The control device A power sales monitoring step that monitors the selling price of electricity generated by a power generation device that can supply electricity to the aforementioned recovery device, The control device Based on the information from the CP monitoring step and the power sales monitoring step gold The switching step includes an evaluation step for evaluating the monetary value, wherein the switching step uses the evaluation result of the evaluation step as the switching parameter to set an operating period for which the state of the recovery device is in operation, and switches the state of the recovery device to the operating state for the duration of the operating period.

[0008] With this configuration, when the selling price of electricity generated by the power generation equipment is high, revenue can be generated by selling the electricity. When the selling price is low, the electricity can be used to operate the recovery equipment, thereby reducing the operating costs of the recovery equipment. In other words, in the evaluation step, by comprehensively evaluating carbon pricing and the selling price of electricity and setting the operating period of the recovery equipment, it is possible to maximize monetary value. Therefore, it becomes possible to operate the recovery equipment in a state where it has high commercial utility value.

[0009] Furthermore, the recovery device is preferably capable of electrochemically generating calcium carbonate from carbonic acid and calcium ions contained in the seawater.

[0010] With this configuration, carbon dioxide can be recovered using carbon dioxide produced when atmospheric carbon dioxide is absorbed into the ocean, along with calcium ions in the ocean. Therefore, it becomes possible to generate revenue based on the amount of carbon dioxide in the ocean, which contributes to the reduction of atmospheric carbon dioxide.

[0011] Furthermore, it is preferable that the recovery device is configured to supply the hydrogen generated during the calcium carbonate production process to a fuel cell and to operate using the electricity generated by the fuel cell.

[0012] In this way, by utilizing the hydrogen generated during the calcium carbonate production process for fuel cell power generation, the cost of carbon dioxide capture can be reduced. Therefore, it becomes possible to operate the capture system in a way that makes it commercially viable.

[0013] Furthermore, in the switching step, if the monetary value is lower than a predetermined value as a result of the evaluation step, it is preferable to stop the operation of the recovery device and store the electricity generated by the power generator in the energy storage device.

[0014] With this configuration, for example, when the electricity selling price is low, electricity can be stored in the energy storage device, and when the selling price rises, electricity can be sold to generate revenue while simultaneously operating the recovery device with the electricity stored in the energy storage device. Therefore, the total cost required for carbon dioxide capture can be reduced, making it possible to operate the recovery device in a way that has high commercial value.

[0015] Furthermore, the power generation device is preferably a wind power generator that utilizes wind energy to convert it into electricity.

[0016] Wind power plants, which generate electricity from wind, are often located in the sea or coastal areas where the carbon dioxide captured by the recovery equipment has been absorbed. Therefore, when a power generation device generates electricity from wind, installing the recovery equipment at or near the wind power plant shortens the transmission distance from the wind power plant to the recovery equipment, thereby reducing power loss. This allows the electricity generated at the wind power plant to be used efficiently for selling electricity and operating the recovery equipment, resulting in higher profits compared to cases with longer transmission distances.

[0017] Furthermore, the power generation device is preferably a wave power generation device that utilizes wave energy to convert it into electricity.

[0018] A wave power generation plant that performs wave power generation is provided in the sea or coastal area where the carbon dioxide recovered by the recovery device is absorbed. Therefore, when the power generation device performs wave power generation, by installing the recovery device in or near the wave power generation plant, the power transmission distance from the wave power generation plant to the recovery device can be shortened, and thus the power loss can be reduced. As a result, the power generated at the wave power generation plant can be efficiently used for power sales and the operation of the recovery device, and more profits can be obtained compared to the case where the power transmission distance is long.

[0019] It is also preferable to further include a weather monitoring step of monitoring weather information, and in the switching step, use the weather information as the switching parameter to set the operation period of the recovery device.

[0020] Depending on the weather conditions, the operation efficiency of power generation devices such as wind power generation varies. Therefore, as in this configuration, by using weather information as a switching parameter to set an operation period such that the recovery device is in an operating state when its utilization value is high, and switching the state of the recovery device between the operating state and the stopped state based on this operation period, it becomes possible to operate the recovery device in a state with high commercial utilization value.

[0021] Furthermore, it is preferable that the control device is configured to receive the carbon pricing obtained in the CP monitoring step and the electricity sales price obtained in the electricity sales monitoring step as inputs, and to output the operating period of the recovery device in the switching step, using a trained model that has been trained to learn the operation method of the recovery device.

[0022] With this configuration, it is possible to appropriately output the operating period of the recovery system that allows it to operate in a commercially valuable state, based on carbon pricing and the electricity selling price. Therefore, it becomes possible to operate the recovery system in a commercially valuable state.

[0023] In addition, the characteristic configuration of the learned model according to the present invention is to input the carbon pricing obtained in the CP monitoring step and the power sales price obtained in the power sales monitoring step, and output the operation period of the recovery device in the switching step. Thus, a trained model that has been machine-learned to operate the above-described recovery device is used, and the computer functions as the control device that accepts the carbon pricing obtained in the CP monitoring step and the electricity sales price obtained in the electricity sales monitoring step as input, and outputs the operating period of the recovery device in the switching step. lies in the point.

[0024] With such a characteristic configuration, based on the carbon pricing and the power sales price, it is possible to appropriately output the operation period of the recovery device that enables the recovery device to be operated in a state with high commercial utilization value. Therefore, it becomes possible to operate the recovery device in a state with high commercial utilization value.

[0025] Furthermore, the trained model that has been taught the operation method of the recovery device is before By inputting the carbon pricing obtained in the CP monitoring step, the electricity sales price obtained in the electricity sales monitoring step, and the weather information obtained in the weather monitoring step, the operating period of the recovery device in the switching step is output. Thus, a trained model that has been machine-learned to operate the above-mentioned recovery device is used, and the computer functions as the control device that receives the carbon pricing obtained in the CP monitoring step, the electricity sales price obtained in the electricity sales monitoring step, and the weather information obtained in the weather monitoring step as input, and outputs the operating period of the recovery device in the switching step. It is preferable to configure it in this way.

[0026] With this configuration, it is possible to appropriately output the operating period of the carbon recovery system that allows it to operate in a commercially valuable state, based on carbon pricing, electricity sales prices, and weather information. Therefore, it becomes possible to operate the carbon recovery system in a commercially valuable state. [Brief explanation of the drawing]

[0027] [Figure 1] This is an explanatory diagram of the operation method of the immobilization device. [Figure 2] This flowchart shows the operating procedure for the immobilization device. [Modes for carrying out the invention]

[0028] The following explanation will use a trained model that outputs the operating method and operating period of a recovery device as an example. However, the operating method and trained model of the recovery device are not limited to the following embodiments and can be modified in various ways without departing from the gist of the explanation.

[0029] Figure 1 is an explanatory diagram of the operation method of the carbon dioxide fixing device 1 that fixes carbon dioxide. "Fixing carbon dioxide" means, for example, reducing the carbon dioxide concentration in a substance by removing carbon dioxide from the substance. In this embodiment, the fixing device 1 fixes carbon dioxide as a fixed compound, and an example of carbon dioxide fixing is given as one method of carbon dioxide recovery.

[0030] In this embodiment, the immobilization device 1 immobilizes carbon dioxide absorbed from the atmosphere into the sea. Specifically, the immobilization device 1 electrochemically generates calcium carbonate from carbonate and calcium ions contained in the sea, as described below.

[0031] As shown in Figure 1, carbon dioxide in the atmosphere is absorbed by the ocean, producing carbonic acid (see equation (1)). CO2 + H2O ⇒ H2CO3···(1)

[0032] Carbonic acid dissociates into hydrogen ions and bicarbonate ions in the ocean (see equation (2)). H2CO3 ⇒ H + +HCO3 - ...(2)

[0033] Furthermore, the bicarbonate ion dissociates into hydrogen ions and carbonate ions (see equation (3)). HCO3 - ⇒ H + +CO3 2- ...(3)

[0034] The carbonate ions produced combine with calcium ions contained in the seawater to form calcium carbonate (see equation (4)). Ca 2+ +CO3 2- ⇒ CaCO3···(4)

[0035] This carbon dioxide sequestration requires electricity (for example, electricity to drive the pump that draws seawater into the sequestration device 1), and in this embodiment, this electricity is supplied by the power generation device 2. As mentioned above, since the sequestration device 1 sequesters carbon dioxide absorbed by the sea, it is preferable to install it near the sea (for example, in coastal areas or on the open sea). In this case, considering the environment, renewable energy is used for the power generation device 2. In this embodiment, electricity generated by wind power generation or wave power generation is used as the renewable energy.

[0036] Wind power generation, as shown in #31 of Figure 1, utilizes wind energy to rotate a wind turbine, and the rotational force from the wind turbine drives a generator to convert it into electricity. Wave power generation, as shown in #32 of Figure 1, utilizes wave energy (the vertical motion of waves) to rotate a turbine, and the rotational force from the turbine drives a generator to convert it into electricity.

[0037] In this embodiment, the power generation device 2 utilizes a hybrid power generation system that uses both wind power and wave power. Of course, the power generation device 2 may also use either wind power or wave power.

[0038] Thus, the stationary power plant 1 is best installed at wind power plants or wave power plants equipped with power generation devices 2 that utilize wind or wave power. This shortens the transmission distance from the wind or wave power plant to the stationary power plant 1, thereby reducing power loss compared to when the stationary power plant 1 is installed at a distance from the wind or wave power plant. Consequently, it becomes possible to efficiently utilize the electricity generated at the wind or wave power plant. Furthermore, the electricity generated at the wind or wave power plant is not only used by the stationary power plant 1, but is also configured to be transmitted via transmission lines and sold to power companies (#33). Consequently, it becomes possible to generate revenue through such electricity sales.

[0039] In the carbon dioxide fixation process in the fixation device 1, hydrogen ions (see equation (3)) are generated during the calcium carbonate production process as described above. These hydrogen ions recombine with electrons to produce hydrogen. This hydrogen is supplied to the fuel cell 3. Along with this hydrogen, oxygen (oxygen produced by the electrolysis of seawater) is supplied to the fuel cell 3, which generates electricity. The electricity generated in the fuel cell 3 is supplied to the fixation device 1 (#34). Therefore, in this embodiment, the fixation device 1 is configured to be operable using the electricity generated in the fuel cell 3. This reduces the cost required for carbon dioxide fixation. The water produced during power generation in the fuel cell 3 is mixed with the seawater components concentrated during carbon dioxide fixation and discharged into the sea (#35).

[0040] As shown in Figure 1, the stationary device 1 is operated by a control device 10. The control device 10 comprises a CP monitoring unit 11, a power sales monitoring unit 12, a weather monitoring unit 13, an evaluation unit 14, and a switching unit 15. Each functional unit is constructed with a CPU as its core component, using hardware, software, or both, to perform processing related to the operation of the stationary device 1.

[0041] The CP monitoring unit 11 monitors carbon pricing, which is traded according to carbon dioxide emissions (#41). Carbon pricing, which is traded according to carbon dioxide emissions, corresponds to the price set for carbon dioxide emissions in carbon tax systems and emissions trading systems. In carbon tax systems, the price set for carbon dioxide emissions refers to carbon taxes imposed by national and local governments on organizations such as companies and other entities, or internal carbon taxes that organizations such as companies and other entities voluntarily set for their greenhouse gas emissions. In emissions trading systems, the price set for carbon dioxide emissions refers to the price of emissions exceeding the upper limit that must be purchased when the upper limit for greenhouse gas emissions set for the above-mentioned organizations in emissions trading is exceeded.

[0042] Furthermore, carbon credits (reductions in emissions of greenhouse gases such as carbon dioxide) that can be bought and sold between companies as credits (rights) are traded in the market and fluctuate (go up or down) according to the relationship between supply and demand, like stock prices. The CP monitoring unit 11 monitors such carbon credits as carbon pricing.

[0043] Such carbon pricing is announced by designated organizations. The CP monitoring unit 11 acquires and monitors information indicating such carbon pricing as carbon pricing information via the network. The process of monitoring carbon pricing, which is traded according to carbon dioxide emissions, is referred to as the CP monitoring step in the operation method of the carbon sequestration device 1.

[0044] The power sales monitoring unit 12 monitors the selling price of electricity generated by the power generation equipment 2 that can supply power to the stationary unit 1 (#42). The electricity generated by the power generation equipment 2 that can supply power to the stationary unit 1 refers to the electricity generated by wind power generation and the electricity generated by wave power generation as described above. The selling price is the price per kWh when selling the generated electricity to the power company. The power sales monitoring unit 12 acquires and monitors information indicating such selling prices as selling price information via the network. This process of monitoring the selling price of electricity generated by the power generation equipment 2 that can supply power to the stationary unit 1 is called the power sales monitoring step in the operation method of the stationary unit 1.

[0045] The weather monitoring unit 13 monitors weather information (#43). Weather information refers to information indicating the weather at the location where the stationary device 1 and the power generation device 2 are installed. Weather information includes information indicating the weather, information indicating wind speed, and information indicating wave height. Such weather information is provided by a designated organization. The weather monitoring unit 13 acquires such weather information via a network. The process of monitoring such weather information is referred to as the weather monitoring step in the operation method of the stationary device 1.

[0046] The evaluation unit 14 evaluates the monetary value based on the information from the CP monitoring step and the power sales monitoring step (#44). The information from the CP monitoring step is carbon pricing information obtained by the CP monitoring unit 11, and the information from the power sales monitoring step is power sales price information obtained by the power sales monitoring unit 12. Evaluating the monetary value means evaluating which of the following scenarios—using the electricity generated by the power generation device 2 for carbon dioxide sequestration and trading the carbon dioxide, selling the electricity, or using a portion for carbon dioxide sequestration and selling the remainder as electricity—has higher commercial value, i.e., higher profitability.

[0047] In this embodiment, as described above, carbon dioxide is fixed by electrochemically generating calcium carbonate from carbon dioxide and calcium ions contained in the seawater. The generated calcium carbonate is then weighed using a weighing device (not shown), and the amount of carbon dioxide reduced is calculated using a reduction amount calculation device (not shown). In this case, the weighing device measures the actual weight of the generated calcium carbonate, and the reduction amount calculation device calculates the amount of carbon dioxide reduced from the weight and molecular weight of the calcium carbonate. The evaluation unit 14 acquires the calculated amount of carbon dioxide reduced as weighing information and evaluates its monetary value as described above.

[0048] For example, if the electricity selling price is a [yen / kWh], the amount of carbon dioxide sequestrated per kWh of electricity is b [tons / kWh], the running costs other than electricity (e.g., costs of other chemicals, etc.) are c [yen / ton-CO2], and the carbon price is d [yen / ton-CO2], a < (d × b) - (c × b) - x ... (5) If equation (5) is true, it is possible to configure the system to use electricity for carbon dioxide sequestration, and if it is not true, to sell the electricity. Furthermore, if the difference between the value on the left side and the value on the right side of equation (5) is less than or equal to a predetermined value, it is also possible to set the ratio of electricity used for carbon dioxide sequestration and electricity sold according to the ratio of the values ​​on the left side and the right side, for example, and to use the electricity for both carbon dioxide sequestration and selling the electricity.

[0049] Here, x is a buffer (margin), and the user should determine a predetermined value as the buffer value. Furthermore, the electricity sales price a [yen / kWh] and the amount of carbon dioxide sequestrated per kWh of electricity b [tons / kWh] should be configured to be updated periodically. This allows for a review of the monetary value based on feedback, making it possible to appropriately evaluate the monetary value.

[0050] It should be noted that while certification of carbon dioxide sequestration amount b is carried out by national and private certification bodies, it is expected that the carbon dioxide sequestration amount b and the content of the certification may differ depending on the certification body.

[0051] The process of evaluating the monetary value based on the information from the CP monitoring step and the power sales monitoring step is called the evaluation step in the operation method of the immobilization device 1. The calcium carbonate measured by the weighing device may be granulated, molded, or immobilized and released into the sea or used for landfill.

[0052] The switching unit 15 switches the state of the stationary device 1 based on the switching parameters (#45). The state of the stationary device 1 refers to the operating state of the stationary device 1. The switching parameters are determination elements used to determine whether to switch the operating state of the stationary device 1. Therefore, the switching unit 15 switches the operating state of the stationary device 1 based on the determination elements. This process of switching the state of the stationary device 1 based on the switching parameters is called a switching step in the operation method of the stationary device 1.

[0053] In this switching step, the information from the CP monitoring step can be used as a switching parameter to switch the state of the carbon fixation device 1 between an operating state and a stopped state. The information from the CP monitoring step corresponds to the carbon pricing information acquired by the CP monitoring unit 11. When using such carbon pricing information as a switching parameter, for example, based on the carbon pricing indicated by the carbon pricing information and the cost required for carbon dioxide fixation in the carbon fixation device 1, if it is determined that fixing carbon dioxide in the carbon fixation device 1 has higher commercial value, the state of the carbon fixation device 1 should be set to an operating state, and if it is determined that fixing carbon dioxide in the carbon fixation device 1 has lower commercial value, the state of the carbon fixation device 1 should be set to a stopped state.

[0054] Furthermore, in the switching step, it is also possible to configure the system to use the evaluation result from the evaluation step as a switching parameter to set an operating period for which the state of the carbon monoxide capture device 1 is in operation, and to switch the state of the carbon monoxide capture device 1 to operation only during the operating period. The evaluation result from the evaluation step corresponds to the monetary value evaluated by the evaluation unit 14. When using such a monetary value as a switching parameter, if it is evaluated that using the electricity generated by the power generator 2 for carbon dioxide monoxide capture and trading the carbon dioxide is more profitable, it is good to keep the carbon monoxide capture device 1 in operation. Such an operating period should be set for the period in which it is evaluated that the profit is higher. On the other hand, if it is evaluated that selling the electricity generated by the power generator 2 is more profitable, it is good to stop the carbon monoxide capture device 1. In this case, the operating period for which the state of the carbon monoxide capture device 1 is in operation is set to zero. Furthermore, if it is evaluated that using a portion of the electricity generated by the power generator 2 for carbon dioxide monoxide capture and selling the remainder is more profitable, it is good to set a time for which the carbon monoxide capture device 1 is kept in operation until it is stopped.

[0055] In this case, it is preferable to use weather information as a switching parameter in the switching step to set the operating period of the stationary device 1. As mentioned above, weather information includes information indicating the weather, information indicating wind speed, and information indicating wave height. The weather, wind speed, and wave height indicated by such information affect the amount of power generated by wind power generation and wave power generation. In such cases, it is preferable to pre-set criteria for determining whether to put the stationary device 1 into an operating state for each of the weather, wind speed, and wave height.

[0056] As described above, the evaluation unit 14 evaluates, based on the carbon pricing information obtained by the CP monitoring unit 11 and the electricity sales price information obtained by the electricity sales monitoring unit 12, which of the following scenarios—using the electricity generated by the power generation device 2 for carbon dioxide sequestration and trading the carbon dioxide, selling the electricity, or using a portion for carbon dioxide sequestration and selling the remainder—is commercially more valuable, i.e., more profitable (evaluates the monetary value). In addition to such carbon pricing information and electricity sales price information, the evaluation unit 14 can also be configured to evaluate the monetary value by determining the amount of electricity generated over a predetermined period of time based on the weather information described above.

[0057] When setting the operating time of the stationary device 1 using such weather information as a switching parameter, it is preferable to use a trained model that has been trained to operate the stationary device 1. In this case, the trained model is configured to output the operating period of the stationary device 1 in the switching step by inputting carbon pricing obtained in the CP monitoring step, the electricity sales price obtained in the electricity sales monitoring step, and weather information obtained in the weather monitoring step.

[0058] The carbon pricing obtained in the CP monitoring step refers to the price set for carbon dioxide emissions, as indicated by the carbon pricing information acquired by the CP monitoring unit 11. The electricity sales price obtained in the electricity sales monitoring step refers to the price per kWh when selling the generated electricity to the power company, as indicated by the electricity sales price information acquired by the electricity sales monitoring unit 12. The weather information obtained in the weather monitoring step refers to the information acquired by the weather monitoring unit 13, and includes information indicating the weather, information indicating wind speed, and information indicating wave height.

[0059] The trained model, when given information such as the price set for carbon dioxide emissions, the price per kWh when selling generated electricity to the power company, weather information, wind speed information, and wave height information, uses AI (e.g., deep learning) to determine and output the commercially optimal operating period (start and end times) for the stationary power plant 1. This trained model is an AI model that has been trained to output the operating period of the stationary power plant 1 in order to maximize monetary value based on the above equation (5), using carbon pricing obtained in the CP monitoring step, electricity sales price obtained in the electricity sales monitoring step, and weather information obtained in the weather monitoring step as input values. Input values ​​to the trained model may also include information on projected power generation after a predetermined time and equipment maintenance information. The output values ​​from the trained model may be a binary value indicating whether to sell electricity or use electricity to operate the stationary power plant 1, or a judgment value for extending the operating period of the stationary power plant 1.

[0060] Furthermore, considering the time and cost involved in starting and stopping the carbon sequestration device 1, it is possible to configure the system to make a long-term decision to continue operation as a result of the evaluation step, even if it is not possible to generate revenue (even if it is operating at a loss) during certain time periods, if, for example, revenue can be generated (it becomes profitable) when compared over a 24-hour period. This avoids a situation where the carbon sequestration device 1 is frequently started and stopped, which would occur if short-term decisions were made at predetermined intervals. Therefore, by operating the carbon sequestration device 1 according to the outputted operating period, it becomes possible to maximize the commercial benefits of carbon trading and electricity sales by using the electricity generated by the power generation device 2 for carbon sequestration.

[0061] Furthermore, for example, if carbon pricing is low, operating the carbon capture device 1 may not cover the costs of carbon capture by the device, or if the electricity selling price is low, the costs of electricity generation may not be covered even if the electricity generated by the power generation device 2 is sold. It is also possible to set a threshold for the monetary value that can identify such situations in advance, and if the monetary value is lower than a predetermined value (corresponding to the threshold) as a result of the evaluation step, the operation of the carbon capture device 1 is stopped in the switching step, and the electricity generated by the power generation device 2 is stored in the energy storage device 4. The transmission of electricity from the power generation device 2 to the energy storage device 4 may be done via the carbon capture device 1, or it may be done directly from the power generation device 2 to the energy storage device 4.

[0062] Furthermore, if the electricity selling price is low, it is possible to use the electricity generated by wind power directly for carbon dioxide sequestration. Moreover, when wind power generation equipment or wave power generation equipment is stopped, such as when it malfunctions or undergoes maintenance, it is possible to use electricity purchased from the market (commercial electricity) for carbon dioxide sequestration. In this case, it is preferable that the electricity purchased from the market is profitable even when used for carbon dioxide sequestration. It is also preferable to store such profitable electricity in advance in the energy storage device 4, and then use the stored electricity when, for example, the power generation device 2 is stopped and it is not profitable to use electricity purchased from the market for carbon dioxide sequestration.

[0063] Next, an example of how to operate the immobilization device 1 will be explained using the flowchart in Figure 2. The flowchart in Figure 2 is just one example of an operating method, and the order of processes can be rearranged or processes can be omitted as appropriate.

[0064] The CP monitoring unit 11 acquires carbon pricing information and monitors carbon pricing (#10). Subsequently, the power sales monitoring unit 12 acquires power sales information and monitors power sales prices (#11). Furthermore, the weather monitoring unit 13 acquires weather information and monitors weather information (#12).

[0065] The evaluation unit 14 evaluates the monetary value based on carbon pricing information, electricity sales information, and weather information (#13). If the monetary value is lower than a predetermined value (#14: Yes), the operation of the carbon monoxide capture device 1 is stopped (#15). In this case, the electricity generated by the power generator 2 is stored in the energy storage device 4 (#16).

[0066] In #14, if the monetary value is above a predetermined value (#14: No), the operating period of the silencing device 1 is set (#17). In this case, the silencing device 1 is operated for the set operating period (#18). The hydrogen generated during the operation of the silencing device 1 is used to generate electricity in the fuel cell 3, and that electricity is supplied to the silencing device 1 (#19). Note that the processes of #18 and #19 may be performed in parallel (simultaneously), or the process of #19 may be performed after the process of #18 has been completed.

[0067] If control of the immobilization device 1 is terminated after #16 or #19 (#20: Yes), the process is completed. If control of the immobilization device 1 is to be continued (#20: No), the process returns to #10 and continues. The immobilization device 1 is operated according to the above flowchart.

[0068] Furthermore, it is also possible to configure the system so that processes #10 to #13 and process #14 are carried out simultaneously and in parallel while the immobilization device 1 is running, and to decide in advance whether to extend the set operating period or terminate it at the set operating period before the set operating period is reached.

[0069] Furthermore, it is possible to configure the system to stop operating the immobilization device 1 at any point if it is determined that there has been a change in the initial forecast (for example, if the weather information is deemed to be incorrect) or if an unforeseen event occurs.

[0070] [Other Embodiments]

[0071] In the above embodiment, the operation method of the immobilization device 1 was given as an example of how to operate the recovery device, and it was explained that this immobilization device 1 fixes (fixes as a solid compound) carbon dioxide absorbed from the atmosphere into the sea. However, the recovery device can also recover carbon dioxide as a gas from the sea (seawater). In this case, it is also possible to configure the device to recover carbon dioxide (gas) from the gas obtained by electrolysis or electrodialysis of seawater using adsorption methods such as adsorption solutions / adsorbents such as amines, or membrane separation methods. Therefore, carbon dioxide recovery includes not only fixing carbon dioxide as a solid compound, but also recovering carbon dioxide in gaseous form.

[0072] Furthermore, recovery devices can not only fix carbon dioxide as a solid compound, but also store it in a tank in its elemental form using absorbents / adsorbents. In this case, the carbon dioxide can be compressed to reduce its volume, stored in tanks, etc., and transported. In this case, the carbon dioxide can also be stored and transported while contained in absorbents / adsorbents. Moreover, it is possible to store the device by submerging it in areas where the seawater circulation rate is slow (for example, areas with deep water). Therefore, carbon dioxide recovery includes not only carbon dioxide fixation but also carbon dioxide storage. Recovery devices can also recover carbon dioxide from the atmosphere as a gas. In this case as well, similar to the case of recovering carbon dioxide absorbed from the atmosphere into the sea in its elemental form as described above, it is possible to store it in a tank in its elemental form using, for example, absorbents / adsorbents. In this case as well, since the amount of carbon dioxide in the atmosphere can be reduced, the recovered carbon dioxide can be traded as carbon credits. Recovery devices can also recover carbon dioxide using algae and microorganisms. In this case, for example, carbon dioxide recovered from seawater could be further fixed in algae or microorganisms, or carbon dioxide could be fixed from within the seawater.

[0073] In the above embodiment, the operation method of the stationary device 1 was described as including a power sales monitoring step of monitoring the power sales price of electricity generated by the power generation device 2 that can be supplied to the stationary device 1, and an evaluation step of evaluating the monetary value based on the CP monitoring step and the information from the power sales monitoring step. However, the operation method of the stationary device 1 can also be configured without including the power sales monitoring step and the evaluation step. In this case, the switching step may be used to switch the state of the stationary device 1 to an operating state or a stopped state based on carbon pricing.

[0074] In the above embodiment, the immobilization device 1 was described as electrochemically generating calcium carbonate from carbon dioxide and calcium ions contained in the sea. That is, although the immobilization device 1 was described as fixing carbon dioxide in the sea, the immobilization device 1 may also fix carbon dioxide in the atmosphere. In this case, the immobilization device 1 could be a carbonation device that brings carbon dioxide into contact with a calcium-containing solid (for example, incinerator ash, slag, concrete, etc.).

[0075] In the above embodiment, the immobilization device 1 was described as being configured to supply hydrogen generated during the calcium carbonate production process to the fuel cell 3 and to be able to operate using the electricity generated by the fuel cell 3. However, the immobilization device 1 can also be configured to operate without using the electricity generated by the fuel cell 3.

[0076] In the above embodiment, it was explained that in the switching step, if the monetary value as a result of the evaluation step is lower than a predetermined value, the operation of the stationary device 1 is stopped and the electricity generated by the power generator 2 is stored in the energy storage device 4. However, even if the monetary value as a result of the evaluation step is lower than a predetermined value, it is also possible to configure the system so that the operation of the stationary device 1 is not stopped in the switching step, and so is it possible to configure the system so that the electricity generated by the power generator 2 is not stored in the energy storage device 4.

[0077] In the above embodiment, the power generation device 2 was described as including wind power generation and wave power generation, but the power generation device 2 may be other types of power generation (e.g., solar power generation) different from wind power generation and wave power generation.

[0078] In the above embodiment, the operation method of the immobilization device 1 was described as including a weather monitoring step, but it is also possible to configure it without including a weather monitoring step.

[0079] In the above embodiment, it was explained that a trained model, which has learned the operation method of the stationary device 1, outputs the operating period of the stationary device 1 in the switching step by inputting the carbon pricing obtained in the CP monitoring step, the electricity sales price obtained in the electricity sales monitoring step, and the weather information obtained in the weather monitoring step. However, it is also possible to configure the trained model to output the operating period of the stationary device 1 without using the weather information obtained in the weather monitoring step. In this case, the trained model should output the operating period of the stationary device 1 in the switching step by inputting the carbon pricing obtained in the CP monitoring step and the electricity sales price obtained in the electricity sales monitoring step.

[0080] The carbon fixation device 1 described above can also be operated in combination with a seawater desalination device that removes various salts from seawater to produce fresh water that can be used as drinking water or industrial water. Since such a seawater desalination device pumps up seawater when producing fresh water, the carbon fixation device 1 can utilize this pumped-up seawater. In this case, it is preferable to supply the pumped-up seawater to an electrolytic device to fix carbon dioxide as calcium carbonate before introducing it into the seawater desalination device. By using a seawater desalination device in this way, calcium and bicarbonate ions in the seawater can be removed in advance by the electrolytic device, thus reducing the load on the seawater desalination device. The operation of such a seawater desalination device is preferably carried out using renewable energy such as wind power or wave power, and the electricity used is switched according to electricity sales or carbon pricing, similar to the carbon fixation device 1. In general, seawater contains about nine times more carbon dioxide than freshwater, so it is possible to improve the commercial value by using carbon dioxide from seawater for fixation.

[0081] In the above embodiment, the immobilization device 1 was described as fixing carbon dioxide by electrochemically generating calcium carbonate from carbon dioxide and calcium ions contained in seawater. In this case, carbon dioxide contained in seawater may be recovered as carbon dioxide using a carbon dioxide recovery device with electrodialysis or the like, and the amount may be measured. Furthermore, the immobilization device 1 can also be applied to ash carbonation devices that fix carbon dioxide in exhaust gas using fly ash generated at wood biomass power plants, coal-fired power plants, and waste incineration facilities, or slag generated at steel mills. Since such fly ash (or slag) contains heavy metals, chemical agents are usually added and mixed in to prevent leaching, but when carbon dioxide is absorbed by the fly ash, it acts as a substitute for the chemical agent and prevents the leaching of heavy metals. This makes it possible to reduce the amount of chemical agent used and lower operating costs. In such cases, it is preferable to use the effect of reducing the amount of chemical agent used as a switching parameter in the switching step described above.

[0082] Furthermore, instead of the ash carbonation apparatus described above, the immobilization apparatus 1 can also be applied to methanol production apparatuses that produce methanol from carbon dioxide and hydrogen, polymer production apparatuses that produce polymers from carbon dioxide and hydrogen, and protein production apparatuses that produce proteins from carbon dioxide and hydrogen.

[0083] The carbon credits described in the above embodiment include credits (rights) that can be bought and sold between companies, but may also include voluntary credits led by NGOs (Non-governmental Organizations), companies, and private organizations. In this case, the CP monitoring unit 11 may monitor information regarding voluntary credits as carbon pricing.

[0084] In the above embodiment, the operation method of the carbon fixation device 1 was described, but the carbon fixation device 1 can also be defined as follows. Such a carbon fixation device 1 is a carbon fixation device 1 that fixes carbon dioxide, and includes a CP monitoring unit 11 that monitors carbon pricing traded according to carbon dioxide emissions, and a switching unit 15 that switches the state of the carbon fixation device 1 based on a switching parameter, and the switching unit 15 can be configured to switch the state of the carbon fixation device 1 to an operating state or a stopped state using carbon pricing information as a switching parameter.

[0085] Furthermore, the operation method of the carbon sequestration device 1 can also be defined as an operation program to be executed by a computer that operates the carbon sequestration device 1. Such an operation program is an operation program to be executed by a computer that operates the carbon sequestration device 1 that sequesters carbon dioxide, and includes a CP monitoring function in which a CP monitoring unit 11 monitors carbon pricing traded according to carbon dioxide emissions, and a switching function in which a switching unit 15 switches the state of the carbon sequestration device 1 based on a switching parameter, and the switching function can be configured to switch the state of the carbon sequestration device 1 between an operating state and a stopped state using information related to carbon pricing as a switching parameter.

[0086] Furthermore, the above operating program is an operating program to be executed by a computer that operates a carbon sequestration device 1 that sequesters carbon dioxide, and includes a CP monitoring function in which a CP monitoring unit 11 monitors carbon pricing traded according to carbon dioxide emissions, a switching function in which a switching unit 15 switches the state of the carbon sequestration device 1 based on switching parameters, a power sales monitoring function in which a power sales monitoring unit 12 monitors the power sales price of electricity generated by a power generation device 2 that can be supplied to the carbon sequestration device 1, and an evaluation function in which an evaluation unit 14 evaluates the monetary value based on the information from the CP monitoring function and the power sales monitoring function. The switching function can be configured to use the evaluation result of the evaluation function as a switching parameter to set an operating period in which the state of the carbon sequestration device 1 is in operation, and to switch the state of the carbon sequestration device 1 to operation only during that operating period.

[0087] Furthermore, the operation method of the carbon sequestration device 1 can also be defined as a recording medium on which an operation program to be executed by a computer operating the carbon sequestration device 1 is recorded. Such a recording medium on which an operation program to be recorded is a recording medium on which an operation program to be executed by a computer operating the carbon sequestration device 1 that sequesters carbon dioxide, and includes a CP monitoring function in which a CP monitoring unit 11 monitors carbon pricing traded according to carbon dioxide emissions, and a switching function in which a switching unit 15 switches the state of the carbon sequestration device 1 based on a switching parameter, and the switching function can be configured to switch the state of the carbon sequestration device 1 between an operating state and a stopped state using carbon pricing information as a switching parameter.

[0088] Furthermore, the recording medium on which the above operating program is recorded is a recording medium on which an operating program is to be executed by a computer that operates the carbon sequestration device 1 that sequesters carbon dioxide, and includes a CP monitoring function in which a CP monitoring unit 11 monitors carbon pricing traded according to carbon dioxide emissions, a switching function in which a switching unit 15 switches the state of the carbon sequestration device 1 based on switching parameters, a power sales monitoring function in which a power sales monitoring unit 12 monitors the power sales price of electricity generated by a power generation device 2 that can be supplied to the carbon sequestration device 1, and an evaluation function in which an evaluation unit 14 evaluates the monetary value based on the information from the CP monitoring function and the power sales monitoring function, and the switching function can be configured to use the evaluation result of the evaluation function as a switching parameter to set an operating period for which the state of the carbon sequestration device 1 is in operation, and to switch the state of the carbon sequestration device 1 to operation only for said operating period.

[0089] The same effects as those of the operation method of the fixed device 1 described above can be achieved with such a fixed device 1, an operation program, and a recording medium on which the operation program is recorded.

[0090] In the above embodiment, the method of operating the recovery device has been described, but it is also possible to configure the device to switch the operating state of the recovery device based on at least one of carbon pricing and the electricity selling price. In this case, the recovery device will A method for operating a carbon dioxide recovery device, A monitoring step that monitors at least one of the following: carbon pricing, which is traded according to carbon dioxide emissions, and the selling price of electricity generated by power generation equipment that can supply electricity to a capture device. Includes a switching step of switching the state of the recovery device based on switching parameters, In the switching step, the system can be configured to switch the state of the recovery device between an operating state and a stopped state based on the monitoring results of the monitoring step.

[0091] In this configuration, revenue can be efficiently generated by operating or stopping the capture system based on at least one of carbon pricing or the electricity selling price. Therefore, it becomes possible to operate the capture system, which captures carbon dioxide, in a way that has high commercial value.

[0092] [Other features and configurations] A characteristic configuration of the operating method for a carbon recovery device according to the present invention is an operating method for a carbon recovery device that recovers carbon dioxide, comprising: a CP monitoring step of monitoring carbon pricing traded according to carbon dioxide emissions; and a switching step of switching the state of the recovery device based on a switching parameter, wherein the switching step uses the information from the CP monitoring step as the switching parameter to switch the state of the recovery device between an operating state and a stopped state.

[0093] With this configuration, it becomes possible to efficiently generate revenue by operating and stopping the capture system based on carbon pricing. In other words, by operating the capture system when carbon pricing is relatively high and stopping it when carbon pricing is relatively low, the capture system can be operated in a state of high monetary value based on fluctuating carbon pricing. Therefore, it becomes possible to operate the capture system, which captures carbon dioxide, in a state of high commercial value. [Industrial applicability]

[0094] The present invention can be used in a method for operating a carbon dioxide recovery device and in a trained model that outputs the operating period of such a recovery device. [Explanation of symbols]

[0095] 1: Immobilization device (recovery device) 2: Power generation equipment 3: Fuel cell 4: Energy storage device

Claims

1. A method for operating a carbon dioxide recovery device, A control device monitors carbon pricing, which is traded according to carbon dioxide emissions, in a CP monitoring step, A switching step in which the control device switches the state of the recovery device based on a switching parameter, The control device monitors the electricity sales price of electricity generated by the power generation device that can be supplied to the recovery device, and The control device includes an evaluation step that evaluates the monetary value based on the information from the CP monitoring step and the power sales monitoring step, A method for operating a recovery device, wherein in the switching step, the evaluation result of the evaluation step is used as the switching parameter to set an operating period for which the state of the recovery device is set to the operating state, and the state of the recovery device is switched to the operating state only for the operating period.

2. The recovery device is a method for operating the recovery device according to claim 1, wherein the recovery device electrochemically generates calcium carbonate from carbonate and calcium ions contained in the sea.

3. The method for operating the recovery device according to claim 2, wherein the recovery device is configured to supply hydrogen generated in the calcium carbonate production process to a fuel cell and to be operated using the electricity generated by the fuel cell.

4. In the switching step, if the monetary value is lower than a predetermined value as a result of the evaluation step, the control device stops the operation of the recovery device and stores the electricity generated by the power generator in the energy storage device, according to claim 1.

5. The method for operating the recovery device according to claim 1, wherein the power generation device is a wind power generator that converts wind energy into electricity.

6. The method for operating the recovery device according to claim 1, wherein the power generation device is a wave power generation device that converts wave energy into electricity.

7. The control device further includes a weather monitoring step of monitoring weather information, The method for operating a recovery device according to claim 5 or 6, wherein in the switching step, the weather information is used as the switching parameter to set the operating period of the recovery device.

8. The method for operating a recovery device according to Claim 1, wherein the control device is configured to receive the carbon pricing obtained in the CP monitoring step and the electricity sales price obtained in the electricity sales monitoring step as inputs, and to output the operating period of the recovery device in the switching step, by a trained model that has been trained by machine learning the method for operating the recovery device.

9. A trained model that has been trained using machine learning to perform the operation method of the recovery device according to claim 1, wherein the operation period of the recovery device in the switching step is output by inputting the carbon pricing obtained in the CP monitoring step and the electricity sales price obtained in the electricity sales monitoring step, A trained model that causes a computer to function as a control device that accepts the carbon pricing obtained in the CP monitoring step and the electricity sales price obtained in the electricity sales monitoring step as inputs, and outputs the operating period of the recovery device in the switching step.

10. A trained model that has been trained using machine learning to perform the operation method of the recovery device according to claim 7, so as to output the operating period of the recovery device in the switching step by inputting the carbon pricing obtained in the CP monitoring step, the electricity sales price obtained in the electricity sales monitoring step, and the weather information obtained in the weather monitoring step, A trained model that causes a computer to function as a control device that accepts the carbon pricing obtained in the CP monitoring step, the electricity sales price obtained in the electricity sales monitoring step, and the weather information obtained in the weather monitoring step as inputs, and outputs the operating period of the recovery device in the switching step.

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