Diamond production system, method, control device, and program

Abstract

To provide a diamond production system, etc. which can contribute to effective utilization of renewable energy.SOLUTION: A diamond production system includes: a hydrogen gas production device which electrolyzes water with electric power to thereby produce hydrogen gas; a methane gas production device which synthesizes the hydrogen gas produced in the hydrogen gas production device with carbon dioxide to thereby produce methane gas; a hydrogen gas flow rate control valve which is for control of the flow rate of the hydrogen gas from the hydrogen gas production device; a methane gas flow rate control valve which is for control of the flow rate of the methane gas from the methane gas production device; and a diamond production device which produces diamond by using the hydrogen gas and the methane gas at the flow rates controlled by the hydrogen gas flow rate control valve and the methane gas flow rate control valve.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The present invention relates to a diamond production system, a method, a control device, and a program. [Background technology]

[0002] As a measure against global warming, it is necessary to effectively utilize renewable energy (including natural energy), such as sunlight, wind, hydroelectric power, geothermal power, solar heat, heat in the atmosphere and other heat that exists in nature, biomass, etc. Furthermore, to expand the use of renewable energy, a stable demand is required to accept the electricity obtained from renewable energy generation.

[0003] However, unlike nuclear power generation and thermal power generation, electricity obtained from renewable energy generation is expensive because it is not obtained in a concentrated manner and does not have high output, and there is no stable demand for it. In addition, electricity obtained from renewable energy generation is easily affected by the natural environment and its supply is unstable, making it difficult to rely heavily on renewable energy. In other words, since it is difficult to provide electricity from renewable energy generation at a cost that matches the demand and to ensure a stable supply, the government currently purchases electricity obtained from renewable energy generation at a fixed price. Furthermore, there is a risk that the supply amount will exceed the demand amount due to the rapid spread of renewable energy generation, so output restrictions or output suppression of renewable energy generation is being carried out, and renewable energy is not being used effectively. Therefore, it has been proposed to store surplus electricity from renewable energy generation or convert (gas conversion) it into fuel gas (e.g., hydrogen gas, methane gas) by P2G (Power to Gas) and store it, and use the stored electricity or use the stored fuel gas to generate electricity when it is not possible to generate electricity (see, for example, Patent Documents 1 to 4). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2015-189721 [Patent Document 1] Patent Publication No. 2018-16840 [Patent Document 2] Patent Publication No. 2020-33284 [Patent Document 3] Patent Publication No. 2020-63206 Summary of the Invention [Problem to be solved by the invention]

[0005] The following analysis is provided by the present inventors.

[0006] However, there are problems with electricity storage and P2G, such as poor profitability, and the current situation is that renewable energy has not yet been effectively utilized. In other words, electricity storage is technologically underdeveloped, and the current situation is that there is no technology that can store surplus electricity sufficiently. P2G is also technologically underdeveloped, and furthermore, labor costs are high, the equipment is expensive, and the larger the power generation facilities and gas production facilities, the more generally they are built in rural areas farther from urban areas, and the costs of pipeline equipment and road construction for transporting and conveying the manufactured fuel gas to the consumption area are high, and there is no stable gas demand (continuous gas consumption) for manufactured fuel gas, which is more expensive and unstable than natural fuel gas, and the current situation is that the cost of manufactured fuel gas does not match the sales price. For the above reasons, the effective utilization of renewable energy has not progressed, and in fact about 40% of surplus electricity is discarded.

[0007] A main object of the present invention is to provide a diamond production system, method, control device, and program that can contribute to the effective use of renewable energy. [Means for solving the problem]

[0008] The diamond production system according to the first aspect includes a hydrogen gas production device that produces hydrogen gas by electrolyzing water using electricity, a methane gas production device that produces methane gas by synthesizing the hydrogen gas produced in the hydrogen gas production device with carbon dioxide, a hydrogen gas flow control valve that controls the flow rate of the hydrogen gas from the hydrogen gas production device, a methane gas flow control valve that controls the flow rate of the methane gas from the methane gas production device, and a diamond production device that produces diamonds using the hydrogen gas and methane gas whose flow rates are controlled by the hydrogen gas flow control valve and the methane gas flow control valve.

[0009] A method for producing diamond according to a second aspect of the present invention includes the steps of: producing hydrogen gas by electrolyzing water using electric power; producing methane gas by synthesizing the produced hydrogen gas with carbon dioxide; and controlling the flow rate of the produced hydrogen gas. The method includes a step of controlling the flow rate of the produced methane gas, and a step of producing diamonds using the hydrogen gas and the methane gas whose flow rates are controlled.

[0010] A control device according to a third aspect is configured to control all of the controllable components in the diamond production system according to the first aspect.

[0011] A program according to a fourth aspect causes a control device to execute a process for controlling controllable components in the diamond production system according to the first aspect.

[0012] The program can be recorded in a computer-readable storage medium. The storage medium can be a non-transient medium such as a semiconductor memory, a hard disk, a magnetic recording medium, or an optical recording medium. In addition, the present disclosure can be embodied as a computer program product. The program is input to the computer device from an input device or an external device via a communication interface, stored in a storage device, drives the processor according to a predetermined step or process, and can display the processing result, including an intermediate state as necessary, at each stage via a display device, or can communicate with the outside via the communication interface. For example, a computer device for this purpose typically includes a processor, a storage device, an input device, a communication interface, and a display device as necessary, which are connectable to each other via a bus. Effect of the Invention

[0013] The first to fourth aspects can contribute to the effective use of renewable energy. [Brief description of the drawings]

[0014] [Figure 1] 1 is a block diagram showing a schematic configuration of a diamond production system according to a first embodiment. [Diagram 2] FIG. 2 is a flow chart diagrammatically illustrating the operation of a control device of the diamond production system according to the first embodiment. [Diagram 3] FIG. 11 is a block diagram showing a schematic configuration of a diamond production system according to a second embodiment. [Figure 4] FIG. 11 is a block diagram showing a schematic configuration of a diamond production system according to a third embodiment. [Diagram 5] FIG. 11 is a block diagram showing a schematic configuration of a diamond production system according to a fourth embodiment. [Figure 6] FIG. 11 is a block diagram showing a schematic configuration of a diamond production system according to a fifth embodiment. [Figure 7]FIG. 13 is a block diagram showing a schematic configuration of a diamond production system according to a sixth embodiment. [Figure 8] FIG. 13 is a block diagram showing a schematic configuration of a diamond production system according to embodiment 7. [Figure 9] FIG. 13 is a block diagram showing a schematic configuration of a diamond production system according to an eighth embodiment. [Figure 10] FIG. 2 is a block diagram illustrating a schematic configuration of hardware resources. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, the embodiments will be described with reference to the drawings. In addition, when drawing reference symbols are used in this application, they are intended to aid understanding only and are not intended to limit the present invention to the illustrated embodiment. In addition, the following embodiments are merely examples and do not limit the present invention. In addition, the connection lines between blocks in the drawings and the like referred to in the following description include both bidirectional and unidirectional. A unidirectional arrow is a schematic representation of the flow of a main signal (data) and does not exclude bidirectionality. Furthermore, although not explicitly shown in the circuit diagrams, block diagrams, internal configuration diagrams, connection diagrams, and the like shown in the present disclosure, an input port and an output port exist at the input end and output end of each connection line. The same is true for input / output interfaces. A program is executed via a computer device, which includes, for example, a processor, a storage device, an input device, a communication interface, and a display device as necessary, and which is configured to be able to communicate with an internal or external device (including a computer) via the communication interface, regardless of whether it is wired or wireless.

[0016] [Embodiment 1] A diamond production system according to the first embodiment will be described with reference to the drawings. 1 is a block diagram showing a schematic configuration of a diamond production system according to a first embodiment.

[0017] The diamond production system 1 is a system that generates electricity using renewable energy, produces hydrogen gas and methane gas, which are raw materials for diamonds, using the electricity obtained by the power generation, and produces diamonds using the produced hydrogen gas and methane gas as raw materials (see FIG. 1). The diamond production system 1 is configured to eliminate or minimize the power transmission cost and gas transportation cost by consolidating power generation, gas production, and gas consumption in one specified site. The diamond production system 1 includes a renewable energy power generation device 11, a hydrogen gas production device 21, a methane gas production device 22, a hydrogen impurity detection sensor 23, a methane impurity detection sensor 24, a hydrogen gas purification device 25, a methane gas purification device 26, a hydrogen gas storage device 31, a methane gas storage device 32, a hydrogen gas flow control valve 33, a methane gas flow control valve 34, and a diamond production device 41. In the diamond production system 1, the renewable energy power generation device 11, the hydrogen gas production device 21, and the methane gas production device 22 are P2G (Power to Gas) systems that convert electricity into fuel gas (here, hydrogen gas and methane gas).

[0018] The renewable energy power generation device 11 is a device that generates power by utilizing renewable energy (see FIG. 1). For example, a solar power generation device, a wind power generation device (including offshore wind power generation device), a hydroelectric power generation device (including ocean current power generation device and wave power generation device), a geothermal power generation device, a solar thermal power generation device, a thermal power generation device that uses atmospheric heat or other heat existing in nature, a biomass power generation device, etc. can be used as the renewable energy power generation device 11. The renewable energy power generation device 11 can be installed in any location, but it is preferable to install it in a location where an energy source can be easily obtained depending on conditions such as the natural environment and topography, and it is generally installed in a location far away from the demand area (consumption area). The electricity (e) generated by the renewable energy power generation device 11 is mainly used in the hydrogen gas production device 21. When the power generated by the renewable energy power generation device 11 exceeds the maximum power consumption of the hydrogen gas production device 21 and stable power can be obtained, the excess power may be used in other devices (such as the methane gas production device 22, the hydrogen gas purification device 25, the methane gas purification device 26, and the diamond production device 41). For other methods of using the excess power, see the second and third embodiments (FIGS. 3 and 4). The renewable energy power generation device 11 may be controlled by a control device 50.

[0019] The hydrogen gas production device 21 is a device that produces hydrogen gas (H2) (see FIG. 1). The hydrogen gas production device 21 uses water (H2O) as a raw material and produces hydrogen gas by electrolyzing the water using the power generated by the renewable energy power generation device 11. The hydrogen gas produced by the hydrogen gas production device 21 is sent to the hydrogen impurity detection sensor 23 through a pipeline. The hydrogen gas produced by the hydrogen gas production device 21 can be mainly used as a raw material gas for diamonds, and can be used as a raw material gas for methane gas. For the use of oxygen gas by-produced by the hydrogen gas production device 21, please refer to the sixth embodiment (FIG. 7). The hydrogen gas production device 21 can be installed in accordance with the renewable energy power generation device 11, and is preferably installed in a place where the power transmission cost can be eliminated or minimized. The hydrogen gas production device 21 can be controlled by the control device 50.

[0020] The methane gas production device 22 is a device that produces methane gas (CH4) (see FIG. 1). The methane gas production device 22 may produce methane gas by synthesizing carbon dioxide and hydrogen gas using carbon dioxide (CO2) and hydrogen gas (H2) as raw materials. The carbon dioxide may be, for example, carbon dioxide directly collected from the atmosphere, or carbon dioxide collected from gas discharged from a factory, power plant, or the like if a factory, power plant, or the like is nearby (Embodiment 7; see FIG. 8). The hydrogen gas may be hydrogen gas stored in the hydrogen gas storage device 31 (or hydrogen gas purified by the hydrogen gas purification device 25). The methane gas produced by the methane gas production device 22 is sent to the methane impurity detection sensor 24 through a pipeline. The methane gas produced by the methane gas production device 22 may be used as a raw material gas for diamonds. For the use of water by-produced by the methane gas production device 22, see embodiment 5 (FIG. 6). The methane gas production device 22 can be installed in conjunction with the hydrogen gas production device 21. The methane gas production device 22 can be controlled by a control device 50.

[0021] The hydrogen impurity detection sensor 23 is a sensor that detects the concentration of impurities in the hydrogen gas produced by the hydrogen gas production apparatus 21 (see FIG. 1). The hydrogen gas that has passed through the hydrogen impurity detection sensor 23 is sent to the hydrogen gas purification apparatus 25 through a pipeline. Data on the concentration of impurities in the hydrogen gas detected by the hydrogen impurity detection sensor 23 is sent to the control device 50.

[0022] The methane impurity detection sensor 24 is a sensor that detects the concentration of impurities in the methane gas produced by the methane gas production apparatus 22 (see FIG. 1). The methane gas that has passed through the methane impurity detection sensor 24 is sent to the methane gas purification apparatus 26 through a pipeline. Data on the concentration of impurities in the methane gas detected by the methane impurity detection sensor 24 is sent to the control device 50.

[0023] The hydrogen gas purifier 25 is a device that purifies the hydrogen gas produced by the hydrogen gas production device 21 (see FIG. 1). The hydrogen gas purifier 25 can be controlled by a control device 50. The hydrogen gas purifier 25 performs purification processing according to the impurity concentration in the hydrogen gas detected by the hydrogen impurity detection sensor 23. The hydrogen gas purifier 25 may discharge the hydrogen gas without performing purification processing when the impurity concentration in the hydrogen gas is equal to or higher than a predetermined concentration (for example, when the hydrogen gas production device 21 starts or stops operating). The hydrogen gas purified by the hydrogen gas purifier 25 is sent to the hydrogen gas storage device 31 and the methane gas production device 22 through pipelines.

[0024] The methane gas purification device 26 is a device that purifies the methane gas produced by the methane gas production device 22 (see FIG. 1). The methane gas purification device 26 can be controlled by a control device 50. The methane gas purification device 26 performs purification processing according to the impurity concentration in the methane gas detected by the methane impurity detection sensor 24. The methane gas purification device 26 may be configured to discharge the methane gas without performing purification processing when the impurity concentration in the methane gas is equal to or higher than a predetermined concentration (for example, when the methane gas production device 22 starts or stops operating). The methane gas purified by the methane gas purification device 26 is sent to the methane gas storage device 32 through a pipeline.

[0025] The hydrogen gas storage device 31 is a device that stores hydrogen gas (see FIG. 1). For example, a device that utilizes a hydrogen storage material, high-pressure compression, low-temperature liquefaction, conversion to other substances, or the like can be used as the hydrogen gas storage device 31. The hydrogen gas storage device 31 can be controlled and the storage amount managed by a control device 50. The hydrogen gas storage device 31 stores hydrogen gas that has been purified in the hydrogen gas purification device 25. The hydrogen gas stored in the hydrogen gas storage device 31 can be sent to a hydrogen gas flow control valve 33 and a methane gas production device 22 through a pipeline.

[0026] The methane gas storage device 32 is a device that stores methane gas (see FIG. 1). As the methane gas storage device 32, for example, a device that utilizes metal-organic framework adsorption, high-pressure compression, low-temperature liquefaction, a methane hydrate method, or the like can be used. The methane gas storage device 32 can be controlled and the storage amount managed by a control device 50. The methane gas storage device 32 stores methane gas that has been purified in the methane gas purification device 26. The methane gas stored in the methane gas storage device 32 can be sent to a methane gas flow control valve 34 through a pipeline.

[0027] The hydrogen gas flow control valve 33 is a valve that controls the flow rate of hydrogen gas from the hydrogen gas storage device 31 (see FIG. 1). For example, an electric flow control valve equipped with a solenoid, a motor, or the like can be used as the hydrogen gas flow control valve 33. The hydrogen gas flow control valve 33 is controlled by a control device 50. The hydrogen gas whose flow rate is controlled by the hydrogen gas flow control valve 33 is merged and mixed with methane gas whose flow rate is controlled by the methane gas flow control valve 34 through a pipeline, and the mixed gas is supplied to the diamond production apparatus 41.

[0028] The methane gas flow control valve 34 is a valve that controls the flow rate of methane gas from the methane gas storage device 32 (see FIG. 1). For example, an electric flow control valve equipped with a solenoid, a motor, or the like can be used as the methane gas flow control valve 34. The methane gas flow control valve 34 is controlled by a control device 50. The methane gas whose flow rate is controlled by the methane gas flow control valve 34 is merged with and mixed with the methane gas whose flow rate is controlled by the hydrogen gas flow control valve 33 through a pipeline, and the mixed gas is supplied to the diamond production apparatus 41.

[0029] The diamond manufacturing apparatus 41 is an apparatus for manufacturing diamonds (artificial diamonds) using hydrogen gas and methane gas (see FIG. 1). The diamond manufacturing apparatus 41 may be an apparatus using a gas phase synthesis method, such as a CVD apparatus using a CVD method such as a hot filament CVD (Chemical Vapor Deposition) method, a microwave plasma CVD method, or a photo CVD method. In the diamond manufacturing apparatus 41, a mixed gas of hydrogen gas and methane gas is supplied into a chamber from a hydrogen gas flow control valve 33 and a methane gas flow control valve 34. In the diamond manufacturing apparatus 41, the mixed gas is chemically reacted in the chamber by physical actions such as plasma, heat, and light, and a diamond synthesized by the chemical reaction is formed on the surface of the processing object (e.g., a substrate, etc.) in the chamber, or diamond is grown on a diamond seed crystal in the chamber. The diamond manufacturing apparatus 41 may collect and reuse the exhaust gas (including by-product gas, by-product, etc.) that is not converted into diamond from the mixed gas. The diamond manufacturing apparatus 41 may be configured not only so that one diamond manufacturing apparatus exists in the path following the hydrogen gas flow control valve 33 and the methane gas flow control valve 34, but also so that a plurality of diamond manufacturing apparatuses exist in parallel. The diamond manufacturing apparatus 41 can be used for manufacturing diamond portions in, for example, gemstones, semiconductor elements, processing tools, wear-resistant tools, heat sinks, bonding tools, window materials, anvils, etc. The diamond manufacturing apparatus 41 can be controlled by a control device 50.

[0030] The control device 50 is a device that controls the renewable energy power generation device 11, the hydrogen gas production device 21, the methane gas production device 22, the hydrogen impurity detection sensor 23, the methane impurity detection sensor 24, the hydrogen gas purification device 25, the methane gas purification device 26, the hydrogen gas storage device 31, the methane gas storage device 32, the hydrogen gas flow control valve 33, the methane gas flow control valve 34, and the diamond production device 41 (hereinafter, the renewable energy power generation device 11 to the diamond production device 41 are referred to as "controlled objects"). The control device 50 can be equipped with a computer function, and can be, for example, a personal computer, a server, or the like. The control device 50 is connected to the controlled object via a network so as to be able to communicate with it. The control device 50 may be installed in a remote location away from the controlled object. The control device 50 may be virtually present on the cloud. By executing a specific stored program, the control device 50 can be virtually configured to include a production management section 51, a power control section 52, a gas production control section 53, a gas purification control section 54, a gas storage control section 55, a gas flow rate control section 56, and a diamond production control section 57.

[0031] The production management unit 51 is a functional unit that acquires a diamond production plan and manages the diamond production volume (see FIG. 1). The production management unit 51 acquires the diamond production plan from the manager terminal 60 through operation by the manager. The diamond production plan is a plan for producing diamonds, and may include data such as the type of diamond, the planned production volume of diamonds, the selling price of diamonds, the manufacturing cost of diamonds, the electricity price of commercial power sources, the selling price of electricity, the gas price, material costs, labor costs, and other expenses. When diamond manufacturing equipment 41 has completed manufacturing of diamonds, the production management unit 51 updates the inventory information and provides feedback to future production plans.

[0032] The power control unit 52 is a functional unit that controls power from the renewable energy power generation device 11, commercial power source, etc., which are power sources (see FIG. 1). The power control unit 52 controls the output destination of the power generated by the renewable energy power generation device 11 according to the power generation amount of the renewable energy power generation device 11 based on the production plan (power price of commercial power source, power selling price, etc.). For example, when the power generation amount of the renewable energy power generation device 11 is less than the minimum power consumption amount of the hydrogen gas production device 21, the power control unit 52 can control the power generated by the renewable energy power generation device 11 not to be output to the hydrogen gas production device 21, but to be used for power sale, storage, or power of other devices. Furthermore, when the power generation amount of the renewable energy power generation device 11 is between the minimum power consumption amount and the maximum power consumption amount of the hydrogen gas production device 21, the power control unit 52 can control the power generated by the renewable energy power generation device 11 to be output intensively to the hydrogen gas production device 21. Furthermore, when the amount of electricity generated by the renewable energy power generation device 11 exceeds the maximum power consumption of the hydrogen gas production device 21, the power control unit 52 can control the electricity generated by the renewable energy power generation device 11 to be output to the hydrogen gas production device 21 while being sold, stored, or used to power other devices.

[0033] The gas production control unit 53 is a functional unit that controls the production of hydrogen gas and methane gas in the hydrogen gas production apparatus 21 and the methane gas production apparatus 22 based on a production plan and gas storage amounts (see FIG. 1). The gas production control unit 53 calculates the production amounts of hydrogen gas and methane gas based on the production plan so that the respective gas storage amounts in the hydrogen gas storage apparatus 31 and the methane gas storage apparatus 32 are optimized, and controls the hydrogen gas production apparatus 21 and the methane gas production apparatus 22 based on the calculated production amounts.

[0034] The gas purification control unit 54 is a functional unit that controls the hydrogen gas purification device 25 and the methane gas purification device 26 based on the detection data from the hydrogen impurity detection sensor 23 and the methane impurity detection sensor 24 (see FIG. 1). When the impurity concentration detected by the hydrogen impurity detection sensor 23 or the methane impurity detection sensor 24 is equal to or higher than a predetermined concentration, the gas purification control unit 54 controls the hydrogen gas purification device 25 or the methane gas purification device 26 to discharge the gas without performing purification processing. When the impurity concentration detected by the hydrogen impurity detection sensor 23 or the methane impurity detection sensor 24 is lower than the predetermined concentration, the gas purification control unit 54 controls the hydrogen gas purification device 25 or the methane gas purification device 26 to perform purification processing.

[0035] The gas storage control unit 55 is a functional unit that controls the input and output of hydrogen gas and methane gas stored in the hydrogen gas storage device 31 and the methane gas storage device 32 (see FIG. 1). Because the gas concentrations used differ for each type of diamond, the gas storage control unit 55 monitors the amounts of gas stored in the hydrogen gas storage device 31 and the methane gas storage device 32 in accordance with the production plan.

[0036] The gas flow control unit 56 is a functional unit that controls the hydrogen gas flow control valve 33 and the methane gas flow control valve 34 so that the mixed gas supplied to the diamond manufacturing apparatus 41 has a predetermined mixture ratio according to the type of diamond (the mixture ratio corresponding to the type of diamond in the production plan) (see FIG. 1). The gas flow control unit 56 changes the set value of the mixture ratio according to the type of diamond in the production plan.

[0037] The diamond production control unit 57 is a functional unit that controls the diamond production apparatus 41 according to the production plan (particularly, the type of diamond) and the gas storage amount (see FIG. 1). The diamond production control unit 57 controls the diamond production apparatus 41 not to operate when the amount of hydrogen gas or methane gas stored in the hydrogen gas storage device 31 or the methane gas storage device 32 is insufficient. The diamond production control unit 57 controls the diamond production apparatus 41 to operate when the amount of hydrogen gas and methane gas stored in the hydrogen gas storage device 31 and the methane gas storage device 32 is equal to or greater than the amount of storage that satisfies the production plan amount of diamond in the production plan. The diamond production control unit 57 controls the diamond production apparatus 41 to have a predetermined production parameter according to the type of diamond when the diamond production apparatus 41 is operating. Examples of the production parameters include the temperature, pressure, and synthesis time in the chamber of the diamond production apparatus 41. The diamond production control unit 57 changes the set value of the production parameter according to the type of diamond in the production plan.

[0038] The administrator terminal 60 is a terminal used by an administrator of the diamond production system 1 (see FIG. 1). For example, a personal computer, a tablet terminal, a smartphone, etc. can be used as the administrator terminal 60. The administrator terminal 60 is connected to the control device 50 so as to be able to communicate with it. The administrator terminal 60 can operate information in the control device 50 by operation of the administrator.

[0039] The operation of the control device of the diamond production system according to the embodiment 1 will be described with reference to the drawings. Fig. 2 is a flow chart diagram showing the operation of the control device of the diamond production system according to the embodiment 1. Please refer to Fig. 1 for the configuration of the diamond production system.

[0040] First, the production management section 51 of the control device 50 acquires a diamond production plan from the manager terminal 60 through operation by the manager (step A1).

[0041] Next, the power control unit 52 of the control device 50 controls the output destination of the power generated by the renewable energy power generation device 11 according to the power generation amount of the renewable energy power generation device 11 based on the production plan (power price of commercial power source, power selling price, etc.) (step A2). For example, if the power generation amount of the renewable energy power generation device 11 is equal to or greater than the minimum power consumption amount of the hydrogen gas production device 21, the power control unit 52 controls the power generated by the renewable energy power generation device 11 to be output to the hydrogen gas production device 21 without using a commercial power source.

[0042] Next, the gas production control unit 53 of the control device 50 controls the production of hydrogen gas and methane gas in the hydrogen gas production device 21 and the methane gas production device 22 based on the production plan and the gas storage amount (step A3).

[0043] Next, the gas purification control unit 54 of the control device 50 controls the hydrogen gas purifier 25 and the methane gas purifier 26 based on the detection data from the hydrogen impurity detection sensor 23 and the methane impurity detection sensor 24 (step A4).

[0044] Next, the gas storage control unit 55 of the control device 50 controls the input and output of the hydrogen gas and the methane gas stored in the hydrogen gas storage device 31 and the methane gas storage device 32 (step A5).

[0045] Next, the gas flow control unit 56 of the control device 50 controls the hydrogen gas flow control valve 33 and the methane gas flow control valve 34 so that the mixed gas supplied to the diamond manufacturing apparatus 41 has a predetermined mixing ratio according to the type of diamond (the mixing ratio corresponding to the type of diamond in the production plan) (step A6).

[0046] Next, the diamond production control unit 57 of the control device 50 controls the diamond production apparatus 41 according to the production plan (particularly, the type of diamond) and the amount of gas stored (step A7). Note that steps A2 to A7 are performed in parallel when the control is started.

[0047] Finally, when the diamond production in the diamond production apparatus 41 is completed, the production management section 51 of the control device 50 updates the inventory information, feeds it back to future production plans (step A8), and then ends the process.

[0048] According to embodiment 1, electricity is generated using renewable energy, hydrogen gas is produced using the generated electricity, methane gas is produced using the produced hydrogen gas, and diamonds are produced using the produced hydrogen gas and methane gas. Diamonds consume a large amount of hydrogen gas, have high added value, and are in increasing demand, so they can contribute to the effective use of renewable energy.

[0049] Furthermore, according to embodiment 1, methane is produced using hydrogen produced using renewable energy and carbon dioxide, and the produced hydrogen and methane are used to produce diamonds. This makes it possible to consume large amounts of hydrogen and methane continuously without incurring transportation (transportation) costs, which contributes to preventing the disposal of surplus electricity.

[0050] Furthermore, according to embodiment 1, hydrogen and methane produced by P2G are consumed continuously in large quantities in the production of artificial diamonds, the market for which is rapidly expanding, which contributes to the technological development of P2G and to the promotion of the long-term use of renewable energy.

[0051] Furthermore, according to the first embodiment, carbon dioxide from the atmosphere or carbon dioxide emitted from factories, power plants, etc. is used as the raw material for methane to produce diamonds, which promotes the suppression of carbon dioxide emissions and carbon fixation, thereby contributing to measures against global warming.

[0052] Furthermore, according to the first embodiment, high-added-value, small-sized diamonds are produced using renewable energy, which contributes to ensuring profitability even if energy prices fluctuate.

[0053] Furthermore, according to embodiment 1, power generation, gas production, and gas consumption can be concentrated within one designated site, so that a diamond production system facility can be constructed in a rural area away from urban areas, eliminating the costs of pipeline installation and road construction, etc. In the long term, it can be less expensive than transporting (transporting) and using natural fuel gas, which can contribute to making the cost of produced fuel gas commensurate with the sales price of the product.

[0054] Furthermore, according to embodiment 1, the entire diamond production system 1 is managed and controlled by the control device 50 based on the production plan, which can contribute to maintaining production capacity even when it is difficult to reduce labor costs or secure personnel.

[0055] [Embodiment 2] The diamond production system according to the second embodiment will be described with reference to the drawings. Fig. 3 is a block diagram showing a schematic configuration of the diamond production system according to the second embodiment.

[0056] The second embodiment is a modification of the first embodiment, in which a commercial power supply control device 12 that controls the commercial power supply is added to the power supply section of the diamond production system 1 (see FIG. 3). The commercial power supply control device 12 controls the commercial power supply according to the amount of power generated by the renewable energy power generation device 11. The commercial power supply control device 12 is electrically connected to the commercial power supply, and is capable of supplying power from the commercial power supply to the hydrogen gas production device 21. The commercial power supply control device 12 is also electrically connected to the renewable energy power generation device 11, and is capable of supplying (selling) surplus power from the renewable energy power generation device 11 to the commercial power supply. The commercial power supply control device 12 can also be configured not to use the commercial power supply. The commercial power supply control device 12 is controlled by a control device 50.

[0057] The power control unit 52 of the control device 50 can control the commercial power supply control device 12 to supply power from the commercial power supply to the hydrogen gas production device 21 when the renewable energy power generation device 11 is not operating or is unstable. When the amount of power generated by the renewable energy power generation device 11 is less than the minimum power consumption of the hydrogen gas production device 21, the power control unit 52 can control the commercial power supply control device 12 not to output the power generated by the renewable energy power generation device 11 to the hydrogen gas production device 21, but to use it for power sale. When the amount of power generated by the renewable energy power generation device 11 exceeds the maximum power consumption of the hydrogen gas production device 21, the power control unit 52 can control the commercial power supply control device 12 to output the power generated by the renewable energy power generation device 11 to the hydrogen gas production device 21 while using it for power sale. The power control unit 52 can control the commercial power supply control device 12 according to the power price of the commercial power supply in the production plan, the power selling price, etc.

[0058] The other configurations are the same as those in the first embodiment.

[0059] According to the second embodiment, similarly to the first embodiment, it is possible to contribute to the effective use of renewable energy, and to make effective use of surplus power of the renewable energy power generation device 11 by selling it through the commercial power control device 12. Furthermore, according to the second embodiment, even if the amount of power generated by the renewable energy power generation device 11 is insufficient or unstable due to the influence of the natural environment, it is possible to continue the operation of the hydrogen gas storage device 31 by using a commercial power source.

[0060] [Embodiment 3] The diamond production system according to the third embodiment will be described with reference to the drawings. Fig. 4 is a block diagram showing a schematic configuration of the diamond production system according to the third embodiment.

[0061] The third embodiment is a modification of the first embodiment, in which a power storage device 13 that stores the power (including surplus power) of the renewable energy power generation device 11 is added to the power supply section of the diamond production system 1. The power storage device 13 is capable of supplying the stored power to the hydrogen gas production device 21. The power storage device 13 is controlled by the control device 50. Depending on the amount of power generated by the renewable energy power generation device 11 and the amount of power stored in the power storage device 13, the power storage device 13 can be controlled to supply the power stored in the power storage device 13 itself to the hydrogen gas production device 21, to store the power of the renewable energy power generation device 11 in the power storage device 13 itself, or not to store or discharge.

[0062] The power control unit 52 of the control device 50 can control the power storage device 13 to supply the power stored in the power storage device 13 to the hydrogen gas production device 21 when the renewable energy power generation device 11 is not operating or is unstable. When the amount of power generated by the renewable energy power generation device 11 is less than the minimum power consumption of the hydrogen gas production device 21, the power control unit 52 can control the power storage device 13 not to output the power generated by the renewable energy power generation device 11 to the hydrogen gas production device 21, but to use it for power storage. When the amount of power generated by the renewable energy power generation device 11 exceeds the maximum power consumption of the hydrogen gas production device 21, the power control unit 52 can control the power storage device 13 to output the power generated by the renewable energy power generation device 11 to the hydrogen gas production device 21 while using it for power storage.

[0063] The other configurations are the same as those of the embodiment 1. Moreover, the embodiment 3 may be applied to the embodiment 2.

[0064] According to the third embodiment, similarly to the first embodiment, it is possible to contribute to the effective use of renewable energy, and to store surplus power of the renewable energy power generation device 11 in the power storage device 13 for effective use. Furthermore, according to the third embodiment, even if the amount of power generated by the renewable energy power generation device 11 is insufficient or unstable due to the influence of the natural environment, the stored power can be used to continue the operation of the hydrogen gas storage device 31.

[0065] [Embodiment 4] The diamond production system according to the embodiment 4 will be described with reference to the drawings. Fig. 5 is a block diagram showing a schematic configuration of the diamond production system according to the embodiment 4.

[0066] The fourth embodiment is a modified example of the first embodiment, in which a spare hydrogen gas source 35, a spare methane gas source 36, a spare hydrogen gas flow control valve 37, and a spare methane gas flow control valve 38 are added so that the operation of the diamond production apparatus 41 can be continued even if the hydrogen gas or methane gas stored in the hydrogen gas storage device 31 or the methane gas storage device 32 becomes insufficient.

[0067] The reserve hydrogen gas source 35 is a reserve hydrogen gas source. The reserve methane gas source 36 is a reserve methane gas source.

[0068] The spare hydrogen gas flow control valve 37 is a valve that controls the flow rate of hydrogen gas from the spare hydrogen gas source 35. For example, an electric flow control valve equipped with a solenoid, a motor, or the like can be used as the spare hydrogen gas flow control valve 37. The spare hydrogen gas flow control valve 37 is controlled by a control device 50. The hydrogen gas whose flow rate is controlled by the spare hydrogen gas flow control valve 37 is merged with and mixed with the methane gas whose flow rate is controlled by the methane gas flow control valve 34 or the spare methane gas flow control valve 38, and the mixed gas is supplied to the diamond production apparatus 41.

[0069] The spare methane gas flow control valve 38 is a valve that controls the flow rate of methane gas from the spare methane gas source 36. For example, an electric flow control valve equipped with a solenoid, a motor, or the like can be used as the spare methane gas flow control valve 38. The spare methane gas flow control valve 38 is controlled by a control device 50. The methane gas whose flow rate is controlled by the spare methane gas flow control valve 38 is merged with and mixed with the methane gas whose flow rate is controlled by the hydrogen gas flow control valve 33 or the spare hydrogen gas flow control valve 37, and the mixed gas is supplied to the diamond production apparatus 41.

[0070] The gas flow control section 56 of the control device 50 controls the hydrogen gas flow control valve 33, the methane gas flow control valve 34, the spare hydrogen gas flow control valve 37, and the spare methane gas flow control valve 38 so that the mixed gas supplied to the diamond production apparatus 41 has a predetermined mixture ratio according to the type of diamond (a mixture ratio corresponding to the type of diamond in the production plan).

[0071] The other configurations are the same as those of the embodiment 1. Moreover, the embodiment 4 may be applied to the embodiments 2 and 3.

[0072] According to the fourth embodiment, like the first embodiment, it is possible to contribute to the effective utilization of renewable energy, and by being configured with a backup hydrogen gas source 35 and a backup methane gas source 36, it is possible to continue operating the diamond manufacturing apparatus 41 even if there is a shortage of hydrogen gas or methane gas stored in the hydrogen gas storage device 31 or the methane gas storage device 32 due to the influence of the natural environment.

[0073] [Embodiment 5] The diamond production system according to the fifth embodiment will be described with reference to the drawings. Fig. 6 is a block diagram showing a schematic configuration of the diamond production system according to the fifth embodiment.

[0074] The fifth embodiment is a modification of the first embodiment, in which water by-produced in the methane gas production apparatus 22 is used as a raw material for hydrogen gas produced in the hydrogen gas production apparatus 21. All or a part of the water by-produced in the methane gas production apparatus 22 may be purified and supplied to the hydrogen gas production apparatus 21. The other configurations are the same as those of the first embodiment. Furthermore, the fifth embodiment may be applied to the second to fourth embodiments.

[0075] According to the fifth embodiment, similarly to the first embodiment, it is possible to contribute to the effective use of renewable energy, and also to make effective use of the water by-produced in the methane gas production apparatus 22.

[0076] [Embodiment 6] The diamond production system according to the sixth embodiment will be described with reference to the drawings. Fig. 7 is a block diagram showing a schematic configuration of the diamond production system according to the sixth embodiment.

[0077] The sixth embodiment is a modification of the first embodiment, in which an oxygen impurity detection sensor 27, an oxygen gas purification device 28, an oxygen gas storage device 39, and an oxygen gas flow control valve 40 are added so that oxygen by-produced in the hydrogen gas production device 21 is used as a cleaning gas for the diamond production device 41 (chamber).

[0078] The oxygen impurity detection sensor 27 is a sensor that detects the impurity concentration in the oxygen gas by-produced in the hydrogen gas production apparatus 21. The oxygen gas that has passed through the oxygen impurity detection sensor 27 is sent to an oxygen gas purification apparatus 28 through a pipeline. Data on the impurity concentration in the oxygen gas detected by the oxygen impurity detection sensor 27 is sent to a control apparatus 50.

[0079] The oxygen gas purifier 28 is a device that purifies the oxygen gas by-produced in the hydrogen gas production device 21. The oxygen gas purifier 28 can be controlled by the control device 50. The oxygen gas purifier 28 purifies the oxygen gas according to the impurity concentration in the oxygen gas detected by the oxygen impurity detection sensor 27. The oxygen gas purifier 28 may exhaust the oxygen gas without performing purification when the impurity concentration in the oxygen gas is equal to or higher than a predetermined concentration (for example, when the hydrogen gas production device 21 starts or stops operating). The oxygen gas purified by the oxygen gas purifier 28 is sent to the oxygen gas storage device 39 through a pipeline.

[0080] The oxygen gas storage device 39 is a device that stores oxygen gas. For example, a device that utilizes an oxygen storage substance, high-pressure compression, low-temperature liquefaction, conversion to other substances, or the like can be used as the oxygen gas storage device 39. The oxygen gas storage device 39 can be controlled and the storage amount managed by a control device 50. The oxygen gas storage device 39 stores oxygen gas that has been purified by the oxygen gas purification device 28. The oxygen gas stored in the oxygen gas storage device 39 can be sent to an oxygen gas flow control valve 40 through a pipeline.

[0081] The oxygen gas flow control valve 40 is a valve that controls the flow rate of oxygen gas from the oxygen gas storage device 39. For example, an electric flow control valve equipped with a solenoid, a motor, or the like can be used as the oxygen gas flow control valve 40. The oxygen gas flow control valve 40 is controlled by a control device 50. The oxygen gas whose flow rate is controlled by the oxygen gas flow control valve 40 is supplied to a diamond production apparatus 41.

[0082] The gas purification control unit 54 of the control device 50 controls the oxygen gas purifier 28 based on the detection data from the oxygen impurity detection sensor 27. When the impurity concentration detected by the oxygen impurity detection sensor 27 is equal to or higher than a predetermined concentration, the gas purification control unit 54 controls the oxygen gas purifier 28 to discharge the gas without performing purification processing. When the impurity concentration detected by the oxygen impurity detection sensor 27 is lower than the predetermined concentration, the gas purification control unit 54 controls the oxygen gas purifier 28 to perform purification processing.

[0083] The gas storage control unit 55 of the control device 50 controls the input and output of the oxygen gas stored in the oxygen gas storage device 39 .

[0084] The gas flow rate control section 56 of the control device 50 controls the oxygen gas flow rate control valve 40 so that the oxygen gas supplied to the diamond production apparatus 41 is at a predetermined flow rate.

[0085] When the operation of the diamond manufacturing apparatus 41 is stopped and the diamond manufacturing apparatus 41 is cleaned, the diamond manufacturing control unit 57 of the control device 50 sets cleaning parameters and controls the diamond manufacturing apparatus 41. Examples of the cleaning parameters include the temperature, pressure, and cleaning time in the chamber of the diamond manufacturing apparatus 41.

[0086] The oxygen gas whose flow rate is controlled by the oxygen gas flow control valve 40 is supplied to the chamber of the diamond production apparatus 41, where oxygen plasma is generated. The generated oxygen plasma is then made to react chemically with carbon and other substances adhering to the inner walls of the chamber, etc., to remove the carbon and other substances, and the oxygen gas is then discharged from the diamond production apparatus 41.

[0087] The other configurations are the same as those of embodiment 1. Moreover, embodiment 6 may be applied to embodiments 2 to 5.

[0088] According to the sixth embodiment, similarly to the first embodiment, it is possible to contribute to the effective use of renewable energy, and also to make effective use of the oxygen by-produced in the hydrogen gas production apparatus 21.

[0089] [Embodiment 7] The diamond production system according to the seventh embodiment will be described with reference to the drawings. Fig. 8 is a block diagram showing a schematic configuration of the diamond production system according to the seventh embodiment.

[0090] The seventh embodiment is a modification of the first embodiment, and further includes a carbon dioxide capture device 29 that captures carbon dioxide from the atmosphere or from gas discharged at a carbon dioxide generation source such as a factory or power plant, and supplies the carbon dioxide to the methane gas production device 22. The carbon dioxide capture device 29 can be controlled by a control device 50. A gas production control unit 53 of the control device 50 controls the capture of carbon dioxide in the carbon dioxide capture device 29 based on a production plan and a gas storage amount.

[0091] The other configurations are the same as those of embodiment 1. Moreover, embodiment 7 may be applied to embodiments 2 to 6.

[0092] According to the seventh embodiment, like the first embodiment, it is possible to contribute to the effective use of renewable energy, and also to produce diamonds by recovering carbon dioxide from the atmosphere and carbon dioxide emitted from factories, power plants, etc., and using it as a raw material for methane, thereby promoting the suppression of carbon dioxide emissions and carbon fixation, and contributing to measures against global warming.

[0093] [Embodiment 8] The diamond production system according to the eighth embodiment will be described with reference to the drawings. Fig. 9 is a block diagram showing a schematic configuration of the diamond production system according to the eighth embodiment.

[0094] The diamond production system 1 is a system that uses electric power to produce hydrogen gas and methane gas, which are the raw materials for diamond, and produces diamonds using the produced hydrogen gas and methane gas as raw materials. The diamond production system 1 includes a hydrogen gas production device 21, a methane gas production device 22, a hydrogen gas flow control valve 33, a methane gas flow control valve 34, and a diamond production device 41.

[0095] The hydrogen gas production device 21 produces hydrogen gas by electrolyzing water using electric power. The methane gas production device 22 produces methane gas by synthesizing the hydrogen gas produced by the hydrogen gas production device 21 with carbon dioxide. The hydrogen gas flow rate control valve 33 controls the flow rate of hydrogen gas from the hydrogen gas production device 21. The methane gas flow rate control valve 34 controls the flow rate of methane gas from the methane gas production apparatus 22. The diamond production apparatus 41 produces diamonds using hydrogen gas and methane gas whose flow rates are controlled by the hydrogen gas flow rate control valve 33 and the methane gas flow rate control valve 34.

[0096] According to embodiment 8, hydrogen gas is produced using electricity, methane gas is produced using the hydrogen gas produced, and diamonds are produced using the hydrogen gas and methane gas produced. Diamonds consume a large amount of hydrogen gas, have high added value, and are in high demand. Therefore, by using electricity generated using renewable energy as the electricity, it is possible to contribute to the effective use of renewable energy.

[0097] The control device according to the first to seventh embodiments can be configured by so-called hardware resources (information processing device, computer), and can use one having the configuration shown in Fig. 10. For example, the hardware resource 100 includes a processor 101, a memory 102, a network interface 103, and the like, which are connected to each other by an internal bus 104.

[0098] 10 is not intended to limit the hardware configuration of the hardware resource 100. The hardware resource 100 may include hardware (e.g., an input / output interface) that is not shown. Furthermore, the number of units such as the processor 101 included in the device is not intended to be limited to the example shown in FIG. 10, and for example, multiple processors 101 may be included in the hardware resource 100. For example, a CPU (Central Processing Unit), an MPU (Micro Processor Unit), a GPU (Graphics Processing Unit), etc. may be used as the processor 101.

[0099] The memory 102 may be, for example, a random access memory (RAM), a read only memory (ROM), a hard disk drive (HDD), a solid state drive (SSD), or the like.

[0100] The network interface 103 may be, for example, a LAN (Local Area Network) card, a network adapter, a network interface card, or the like.

[0101] The functions of the hardware resource 100 are realized by the above-mentioned processing module. The processing module is realized, for example, by the processor 101 executing a program stored in the memory 102. The program can be updated by downloading it via a network or by using a storage medium storing the program. Furthermore, the processing module may be realized by a semiconductor chip. That is, it is sufficient that the functions performed by the processing module are realized by executing software on some kind of hardware.

[0102] A part or all of the above-described embodiments may be described as, but is not limited to, the following supplementary notes.

[0103] [Appendix 1] A hydrogen gas production device that produces hydrogen gas by electrolyzing water using electricity; a methane gas production apparatus for producing methane gas by synthesizing the hydrogen gas produced by the hydrogen gas production apparatus with carbon dioxide; a hydrogen gas flow rate control valve that controls the flow rate of the hydrogen gas from the hydrogen gas production device; a methane gas flow rate control valve that controls the flow rate of the methane gas from the methane gas production apparatus; a diamond production apparatus for producing diamonds using the hydrogen gas and the methane gas whose flow rates are controlled by the hydrogen gas flow control valve and the methane gas flow control valve; A diamond production system comprising: [Appendix 2] The facility is equipped with a renewable energy power generation device that generates electricity using renewable energy, The hydrogen gas production apparatus uses electricity generated by the renewable energy power generation apparatus as the electricity. 2. A diamond production system as described in appendix 1. [Appendix 3] A renewable energy power generation device is a solar power generation device that generates electricity using sunlight. Attachment 2 describes a diamond production system. [Appendix 4] a hydrogen gas storage device that stores the hydrogen gas produced by the hydrogen gas production device; a methane gas storage device that stores the methane gas produced by the methane gas production device; Equipped with The hydrogen gas flow control valve controls the flow rate of the hydrogen gas from the hydrogen gas storage device. The methane gas flow control valve controls the flow rate of the methane gas from the methane gas storage device. A diamond production system according to any one of claims 1 to 3. [Appendix 5] a hydrogen gas purification device that purifies the hydrogen gas produced by the hydrogen gas production device; a methane gas purification device for purifying the methane gas produced by the methane gas production device; Equipped with The hydrogen gas storage device stores the hydrogen gas purified by the hydrogen gas purification device, The methane gas storage device stores the methane gas purified by the methane gas purification device. Attachment 4 describes a diamond production system. [Appendix 6] a hydrogen impurity detection sensor for detecting an impurity concentration in the hydrogen gas produced by the hydrogen gas production apparatus; a methane impurity detection sensor for detecting a concentration of impurities in the methane gas produced by the methane gas production apparatus; Equipped with the hydrogen gas purification device purifies the hydrogen gas in accordance with the impurity concentration detected by the hydrogen impurity detection sensor, The methane gas purification device purifies the methane gas in accordance with the impurity concentration detected by the methane impurity detection sensor. 6. The diamond production system of claim 5. [Appendix 7] a commercial power supply control device electrically connected to a commercial power supply, the renewable energy power generation device, and the hydrogen gas production device, and controlling the commercial power supply; The commercial power supply control device controls the commercial power supply so as to supply the electric power of the commercial power supply to the hydrogen gas production device, or to supply the electric power of the renewable energy power generation device to the commercial power supply, or not to use the commercial power supply, depending on the amount of power generated by the renewable energy power generation device. A diamond production system according to any one of claims 2 to 6. [Appendix 8] a power storage device electrically connected to the renewable energy power generation device and the hydrogen gas production device and capable of storing the power of the renewable energy power generation device; The storage device is controlled so that the electric power stored in the storage device is supplied to the hydrogen gas production device, or the electric power of the renewable energy power generation device is stored in the storage device, or the electric power is not stored or discharged, depending on the amount of power generated by the renewable energy power generation device and the amount of power stored in the storage device. A diamond production system according to any one of appendix 2 to 7. [Appendix 9] a backup hydrogen gas source; a backup source of methane gas; a reserve hydrogen gas flow control valve that controls the flow rate of the hydrogen gas from the reserve hydrogen gas source; a reserve methane gas flow control valve for controlling the flow rate of the methane gas from the reserve methane gas source; Equipped with The diamond manufacturing apparatus is capable of manufacturing the diamond using the hydrogen gas and the methane gas whose flow rates are controlled by the preliminary hydrogen gas flow control valve and the preliminary methane gas flow control valve. A diamond production system according to any one of claims 1 to 8. [Appendix 10] The hydrogen gas production apparatus produces the hydrogen gas by electrolyzing the water, including water by-produced in the methane gas production apparatus. A diamond production system according to any one of claims 1 to 9. [Appendix 11] an oxygen impurity detection sensor for detecting an impurity concentration in the oxygen gas by-produced in the hydrogen gas production apparatus; an oxygen gas purification device that purifies the oxygen gas by-produced in the hydrogen gas production device according to the impurity concentration in the oxygen gas detected by the oxygen impurity detection sensor; an oxygen gas storage device for storing the oxygen gas purified by the oxygen gas purification device; an oxygen gas flow rate control valve that controls the flow rate of the oxygen gas from the oxygen gas storage device; Equipped with When cleaning the diamond manufacturing apparatus itself, the diamond manufacturing apparatus is cleaned using the oxygen gas whose flow rate is controlled by the oxygen gas flow rate control valve. A diamond production system according to any one of claims 1 to 10. [Appendix 12] A carbon dioxide capture device is provided to capture carbon dioxide from the atmosphere or a gas emitted from a carbon dioxide generation source, The methane gas production apparatus uses carbon dioxide from the carbon dioxide recovery apparatus as the carbon dioxide. A diamond production system according to any one of claims 1 to 11. [Appendix 13] All of the components in the diamond production system are concentrated within one designated site; A diamond production system according to any one of claims 1 to 12. [Appendix 14] A controller configured to control all of the controllable components in the diamond production system. A diamond production system according to any one of claims 1 to 13. [Appendix 15] A step of producing hydrogen gas by electrolyzing water using electricity; A step of producing methane gas by synthesizing the produced hydrogen gas with carbon dioxide; controlling the flow rate of the produced hydrogen gas; controlling the flow rate of the produced methane gas; producing diamond using the hydrogen gas and the methane gas at controlled flow rates; A method for producing diamond, comprising: [Appendix 16] The method includes generating electricity using renewable energy, In the step of producing hydrogen gas, the electric power obtained in the step of generating electric power is used as the electric power. 16. The method of producing a diamond as described in claim 15. [Appendix 17] All of the above steps take place on one designated site; 17. The diamond production system according to claim 15 or 16. [Appendix 18] A control device configured to control all of the controllable components in a diamond production system described in any one of appendixes 1 to 13. [Appendix 19] A program that causes a control device to execute a process for controlling a controllable component in a diamond production system described in any one of appendixes 1 to 13.

[0104] The disclosures of the above patent documents are incorporated herein by reference and may be used as the basis or part of the present invention as necessary. Within the framework of the entire disclosure of the present invention (including the claims and drawings), and further based on the basic technical idea, modifications and adjustments of the embodiments and examples are possible. Furthermore, within the framework of the entire disclosure of the present invention, various combinations or selections (or non-selection as necessary) of various disclosed elements (including each element of each claim, each element of each embodiment or example, each element of each drawing, etc.) are possible. In other words, the present invention naturally includes various modifications and corrections that a person skilled in the art would be able to make according to the entire disclosure, including the claims and drawings, and the technical idea. Furthermore, with regard to the numerical values ​​and numerical ranges described in this application, any intermediate value, lower numerical value, and small range are deemed to be described even if not specified. Furthermore, the disclosures of the above cited documents may be used in part or in whole in combination with the descriptions in this document as part of the disclosure of the present invention as necessary, in accordance with the spirit of the present invention, and are deemed to be included (belong) in the disclosures of this application. [Explanation of symbols]

[0105] 1 Diamond Production System 11 Renewable energy power generation equipment 12 Commercial power control device 13. Energy storage device 21 Hydrogen gas production equipment 22 Methane gas production equipment 23 Hydrogen impurity detection sensor 24 Methane impurity detection sensor 25 Hydrogen gas purification equipment 26 Methane gas purification equipment 27 Oxygen impurity detection sensor 28 Oxygen gas purification device 29 Carbon dioxide capture equipment 31 Hydrogen gas storage device 32 Methane gas storage device 33 Hydrogen gas flow control valve 34 Methane gas flow control valve 35 Backup hydrogen gas source 36 Backup methane gas source 37 Reserve hydrogen gas flow control valve 38 Reserve methane gas flow control valve 39 Oxygen gas storage device 40 Oxygen gas flow control valve 41 Diamond manufacturing equipment 50 Control device 51 Production Management Department 52 Power Control Unit 53 Gas production control section 54 Gas Purification Control Unit 55 Gas storage control unit 56 Gas flow control section 57 Diamond Manufacturing Control Unit 60 Administrator terminal 100 Hardware Resources 101 Processor 102 Memory 103 Network Interface 104 Internal Bus

Claims

1. a hydrogen gas production device that produces hydrogen gas by electrolyzing water using electricity; a methane gas production device that produces methane gas by synthesizing the hydrogen gas produced by the hydrogen gas production device with carbon dioxide; a hydrogen gas flow rate control valve that controls the flow rate of the hydrogen gas from the hydrogen gas production device; a methane gas flow rate control valve that controls the flow rate of the methane gas from the methane gas production device; a diamond production apparatus for producing diamonds using the hydrogen gas and the methane gas whose flow rates are controlled by the hydrogen gas flow control valve and the methane gas flow control valve; A diamond production system comprising:

2. Equipped with a renewable energy power generation device that generates electricity using renewable energy, The hydrogen gas production device uses, as the electric power, electric power generated by the renewable energy power generation device. The diamond production system according to claim 1.

3. A renewable energy power generation device is a solar power generation device that generates electricity using sunlight. The diamond production system according to claim 2.

4. a hydrogen gas storage device that stores the hydrogen gas produced by the hydrogen gas production device; a methane gas storage device that stores the methane gas produced by the methane gas production device; Equipped with The hydrogen gas flow control valve controls the flow rate of the hydrogen gas from the hydrogen gas storage device. The methane gas flow control valve controls the flow rate of the methane gas from the methane gas storage device. The diamond production system according to claim 1.

5. a hydrogen gas purifier that purifies the hydrogen gas produced by the hydrogen gas production apparatus; a methane gas purification device that purifies the methane gas produced by the methane gas production device; Equipped with the hydrogen gas storage device stores the hydrogen gas purified by the hydrogen gas purification device; The methane gas storage device stores the methane gas purified by the methane gas purification device. The diamond production system according to claim 4.

6. a hydrogen impurity detection sensor for detecting the concentration of impurities in the hydrogen gas produced by the hydrogen gas production apparatus; a methane impurity detection sensor for detecting a concentration of impurities in the methane gas produced by the methane gas production apparatus; Equipped with the hydrogen gas purifier purifies the hydrogen gas in accordance with the impurity concentration detected by the hydrogen impurity detection sensor; the methane gas purification device purifies the methane gas in accordance with the impurity concentration detected by the methane impurity detection sensor; The diamond production system according to claim 5.

7. a commercial power supply control device electrically connected to a commercial power supply, the renewable energy power generation device, and the hydrogen gas production device, and controlling the commercial power supply; The commercial power supply control device controls the commercial power supply so that, depending on the amount of power generated by the renewable energy power generation device, the power of the commercial power supply is supplied to the hydrogen gas production device, or the power of the renewable energy power generation device is supplied to the commercial power supply, or the commercial power supply is not used. The diamond production system according to claim 2.

8. a power storage device electrically connected to the renewable energy power generation device and the hydrogen gas production device and capable of storing the power of the renewable energy power generation device; The power storage device is controlled so that the power stored in the power storage device is supplied to the hydrogen gas production device, or the power from the renewable energy power generation device is stored in the power storage device, or the power storage device is not stored or discharged, depending on the power generation amount of the renewable energy power generation device and the power storage amount of the power storage device. The diamond production system according to claim 2.

9. a backup hydrogen gas source; a backup methane gas source; a reserve hydrogen gas flow control valve that controls the flow rate of the hydrogen gas from the reserve hydrogen gas source; a reserve methane gas flow control valve that controls the flow rate of the methane gas from the reserve methane gas source; Equipped with The diamond production apparatus is capable of producing the diamond using the hydrogen gas and the methane gas whose flow rates are controlled by the spare hydrogen gas flow control valve and the spare methane gas flow control valve. The diamond production system according to claim 1.

10. The hydrogen gas production device produces the hydrogen gas by electrolyzing the water including water by-produced in the methane gas production device. The diamond production system according to claim 1.

11. an oxygen impurity detection sensor for detecting the concentration of impurities in the oxygen gas by-produced in the hydrogen gas production apparatus; an oxygen gas purifier that purifies the oxygen gas by-produced in the hydrogen gas production apparatus in accordance with the impurity concentration in the oxygen gas detected by the oxygen impurity detection sensor; an oxygen gas storage device that stores the oxygen gas purified by the oxygen gas purification device; an oxygen gas flow rate control valve that controls the flow rate of the oxygen gas from the oxygen gas storage device; Equipped with When cleaning the diamond manufacturing apparatus itself, the diamond manufacturing apparatus is cleaned using the oxygen gas whose flow rate is controlled by the oxygen gas flow rate control valve. The diamond production system according to claim 1.

12. A carbon dioxide capture device is provided to capture carbon dioxide from the atmosphere or gas emitted from a carbon dioxide generation source, The methane gas production apparatus uses carbon dioxide from the carbon dioxide recovery apparatus as the carbon dioxide. The diamond production system according to claim 1.

13. All of the components in the diamond production system are concentrated within one designated site. The diamond production system according to claim 1.

14. a controller configured to control all of the controllable components in the diamond production system; 14. A diamond production system according to any one of claims 1 to 13.

15. producing hydrogen gas by electrolyzing water using electricity; a step of producing methane gas by synthesizing the produced hydrogen gas with carbon dioxide; controlling the flow rate of the produced hydrogen gas; controlling the flow rate of the produced methane gas; a step of producing diamond using the hydrogen gas and the methane gas at controlled flow rates; A method for producing diamonds, comprising:

16. It includes a process of generating electricity using renewable energy, In the step of producing hydrogen gas, the electric power obtained in the step of generating electric power is used as the electric power.

16. The method for producing diamond according to claim 15.

17. All of the steps are carried out on one predetermined site; 17. The method for producing diamond according to claim 15 or 16.

18. A control device configured to control all of the controllable components of a diamond production system according to any one of claims 1 to 13.

19. A program that causes a control device to execute a process for controlling a controllable component in a diamond production system according to any one of claims 1 to 13.

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