Energy optimal management system using turquoise hydrogen

Abstract

The present invention provides an energy optimal management system using turquoise hydrogen, the system comprising: a turquoise hydrogen production system (300) in which a portion of methane flows and is pyrolyzed so that turquoise hydrogen and heat are produced; a fuel cell (500) to which the turquoise hydrogen produced in the turquoise hydrogen production system (300) flows so that electricity and heat are produced by means of an electrical reaction; a hydrogen engine system (700) in which the turquoise hydrogen produced in the turquoise hydrogen production system (300) flows and is combusted so that electricity and heat are produced; and a cogeneration system (600) to which the other portion of methane flows and heat flows from the fuel cell (500) so that electricity and heat are produced.

Description

Optimal energy management system using cyan hydrogen

[0001] The present invention relates to energy engineering, environmental engineering and chemical engineering.

[0002] Blue-green hydrogen refers to hydrogen (H2) produced along with carbon (C) through the thermal decomposition of methane (CH4). Natural gas (LNG) is sometimes used as a raw material. Compared to brown hydrogen, which is extracted by gasifying coal, and gray and blue hydrogen, which are produced by reacting methane with steam, it has the significant advantage of being environmentally friendly, as it produces no carbon dioxide whatsoever.

[0003] However, methane pyrolysis requires significant energy. Studies have shown that, assuming a pure pyrolysis device without any catalyst, high-purity hydrogen can be separated at temperatures of 1,200 to 1,350 degrees Celsius. Technologies that utilize catalysts, plasma, molten salts, liquid metals, and other techniques to lower temperatures or facilitate separation have been disclosed, but all methods consume significant energy.

[0004] In this way, to produce cyan hydrogen, an energy source is needed to raise the pyrolysis reactor to the required temperature. If carbon fuel or other fuels are directly used for this purpose or electric energy is used, the environmental friendliness advantage is lost.

[0005] Patents have been proposed for utilizing renewable energy to produce environmentally friendly cyan hydrogen. Examples include KR 10-2008423 B, CN 110329991 A, CN 107986231 A, CN 115477279 A, ​​EP 3560888 A, KR 10-2021-0059142 A, and KR 10-2211017 B. However, considering the intermittency of renewable energy, stable production is difficult, and producing hydrogen at industrially usable levels requires significant renewable energy facilities, posing economic challenges.

[0006] Patents have been proposed for combusting some of the produced cyanobacteria in the system to secure an energy source for methane pyrolysis. Examples include JP 2022-527501 A, EP 1658357 A, US 2006-0194990 A, KR 10-2022-0145373 A, JP 2001-220103 A, JP 2009-196869 A, US 2009-0214987 A, CN 217578321 B, US 2022-0177311 A, US 2022-0144642 A, KR 10-0454805 B, and KR 10-2004-0004799 A. However, in this case, the final product, hydrogen cyanide, is insufficient to secure it, so its industrial utility is limited.

[0007] US 2022-0052364 A and EP 3888171 A patents have studied ways to utilize the produced cyan hydrogen in fuel cells, and proposed a method of utilizing the heat generated from the fuel cell to produce cyan hydrogen. However, due to the characteristics of DCFC, the thermal energy that can be supplied to the methane pyrolysis part is very limited, making it very difficult to implement in reality. There are more patents that utilize cyan hydrogen in conjunction with fuel cells, such as EP 3268308 B, CN 112028016 A, US 2023-0021737 A, US 2023-0109645 A, JP 2019-075263 A, EP 1140695 B, JP 3935197 B, and JP 6942651 B, but they do not propose a meaningful energy optimization concept.

[0008] CN 100511802 C proposes a technology that combines cyanobacteria with two fuel cells and a turbine, considering energy circulation. However, heat recovery in the turbine cycle is difficult, and since only hydrogen and carbon are utilized in the fuel cell, all the heat generated by the fuel cell is wasted. Additional patents that utilize cyanobacteria with turbines, such as CN 107628589 B and EP 4133034 A, fail to propose a meaningful energy optimization concept.

[0009] Meanwhile, all patents exemplifying technologies linked to cyanobacteria and fuel cells or turbines lack consideration of the installation sites for these facilities. Industries utilizing fuel cells or turbines are energy suppliers. If an energy supplier already owns generators and adds a pyrolysis reactor for cyanobacteria production, the installation site must be considered when determining energy flow, electricity flow, and heat flow. However, no patents addressing this issue were identified.

[0010] The present invention has been devised to solve the above problems.

[0011] Although cyanobacteria is environmentally friendly, it requires significant energy. By optimizing the energy required, we propose a system for supplying electric and thermal energy that is both economical, environmentally friendly, and energy efficient.

[0012] One embodiment of the present invention for solving the above-described problem provides an energy optimal management system utilizing cyan hydrogen, including a cyan hydrogen production system (300) in which a portion of methane is introduced and thermally decomposed to produce cyan hydrogen and heat; a fuel cell (500) in which cyan hydrogen produced in the cyan hydrogen production system (300) is introduced and produces electricity and heat through an electrical reaction; a hydrogen engine system (700) in which cyan hydrogen produced in the cyan hydrogen production system (300) is introduced and combusted to produce electricity and heat; and a combined heat and power generation system (600) in which another portion of methane is introduced and heat is introduced from the fuel cell (500) to produce electricity and heat.

[0013] In addition, the cyan hydrogen production system (300) includes a pyrolysis reactor (330) into which some of the methane is introduced and thermally decomposed to produce and discharge cyan hydrogen and carbon and further discharge residual methane; a heat exchanger (310) that absorbs heat from the cyan hydrogen, carbon and residual methane discharged from the pyrolysis reactor (330); and a heat exchanger (370) that absorbs heat from the carbon produced in the pyrolysis reactor (330), and it is preferable that the heat absorbed in the heat exchanger (310, 370) is provided to the fuel cell (500) and the hydrogen engine system (700).

[0014] In addition, it is preferable that some of the heat absorbed in the heat exchanger (310) is provided to the fuel cell (500) and the hydrogen engine system (700), and another part of the heat absorbed in the heat exchanger (310) is provided to preheat some of the methane flowing into the pyrolysis reactor (330).

[0015] In addition, the above-described cyan hydrogen production system (300) further includes a carbon filter (340) that filters carbon from the cyan hydrogen, carbon, and residual methane discharged from the pyrolysis reactor (330), and it is preferable that the carbon filtered by the carbon filter (340) is introduced into the heat exchanger (370) together with the carbon produced in the pyrolysis reactor (330) and heat is absorbed therefrom.

[0016] In addition, the cyan hydrogen production system (300) further includes a membrane (360) into which cyan hydrogen and residual methane remaining after carbon is filtered out in the carbon filter (340) are introduced and the cyan hydrogen is filtered, and it is preferable that the cyan hydrogen filtered in the membrane (360) is provided to the fuel cell and the hydrogen engine system (700), and the residual methane remaining in the membrane (360) is introduced back into the thermal decomposition reactor (330).

[0017] In addition, it is preferable that the fuel cell (500) includes a stack (510) into which cyan hydrogen produced in the cyan hydrogen production system (300) flows to produce electricity; and an afterburner (520) into which a portion of the gas discharged from the stack (510) flows to produce heat.

[0018] Additionally, it is preferable that another portion of the gas discharged from the stack (510) is introduced into the stack (510).

[0019] In addition, it is preferable that the hydrogen engine system (700) includes a hydrogen engine (710) that produces electricity and exhaust gas by burning cyan hydrogen produced in the cyan hydrogen production system (300); and a heat recovery device (720) that recovers heat from the exhaust gas produced in the hydrogen engine (710).

[0020] In addition, it is preferable that the combined heat and power generation system (600) generates electricity by using another part of the methane, and generates electricity and heat by using the heat generated in the afterburner (520).

[0021] In addition, it is desirable to provide electric energy by introducing into the grid (800) electricity produced in the stack (510), electricity produced by power generation in the combined heat and power generation system (600), and electricity produced by combustion of the hydrogen engine (710).

[0022] In addition, it is desirable to provide thermal energy by introducing heat produced during power generation in the combined heat and power generation system (600) and heat recovered in the heat recovery device (720) into the hot water tank (900).

[0023] In addition, the heat produced in the afterburner (520) is preferably optionally supplied to the combined heat and power system (600), or used to preheat hydrogen supplied to the stack (510), or used to preheat hydrogen supplied to the hydrogen engine (710), or used to preheat hydrogen supplied to the pyrolysis reactor (330), or supplied as a heat source for the pyrolysis reactor (330).

[0024] In addition, the heat recovered from the above-described array recovery device (720) is preferably optionally supplied to the combined heat and power system (600), or used to preheat hydrogen supplied to the stack (510), or used to preheat hydrogen supplied to the hydrogen engine (710), or used to preheat hydrogen supplied to the pyrolysis reactor (330), or supplied as a heat source for the pyrolysis reactor (330).

[0025] In addition, it is preferable that the cyanobacteria production system (300) further includes a heat providing system (100) that provides heat for thermal decomposition of a portion of the methane, and that the heat providing system (100) includes a renewable energy system (110).

[0026] In addition, it is preferable to further include a carbon storage tank (400) in which carbon produced by thermal decomposition of a portion of the methane in the above-described cyanobacteria production system (300) is stored.

[0027] In addition, it is preferable that the combined heat and power generation system (600) is separated from the fuel cell (500) and the small engine system (700), so that the energy optimal management system is operated in a distributed manner.

[0028] According to the present invention, electricity and heat can be supplied to demand sources with high energy efficiency. While cyanobacteria are environmentally friendly, they have the disadvantage of requiring significant energy for thermal decomposition. The remaining heat after thermal decomposition is circulated and recycled within the cyanobacteria production system through heat exchange, and at the same time, the remaining heat can be supplied to fuel cells and hydrogen engines. Furthermore, any remaining heat after the fuel cells and hydrogen engines provide heat energy can be supplied back to the cyanobacteria production system, resulting in extremely high energy efficiency.

[0029] External heat sources (such as combustion of fossil fuels) can be minimized by the aforementioned heat flow, and eco-friendly energy management can be implemented by linking with renewable energy systems such as solar, wind, and geothermal.

[0030] Furthermore, the present invention can be operated in a distributed manner. By utilizing engines instead of turbines, demand sites such as residential areas and industrial facilities can simply prepare fuel cells and hydrogen engines, which require little space, and connect them to demand sites where combined heat and power systems and cyanobacteria production systems are located. This minimizes initial installation costs and enables optimal energy management.

[0031] Figure 1 is a schematic diagram of an energy optimal management system according to the present invention.

[0032] Figure 2 is a schematic diagram illustrating in detail a cyan hydrogen production system in an energy optimal management system according to the present invention.

[0033] Figure 3 is a schematic diagram illustrating in detail a fuel cell and a hydrogen engine in an energy optimal management system according to the present invention.

[0034]

[0035] Hereinafter, the method according to the present invention will be described in detail with reference to the drawings.

[0036]

[0037] First, with reference to Figure 1, the energy optimization management system according to the present invention is schematically described. In the drawing, solid lines represent the flow of materials (e.g., gas), and dotted lines represent the flow of heat. The dashed-dotted lines (designated A and B) represent the optionally operable recirculation flow of heat.

[0038] As illustrated in FIG. 1, the energy optimal management system according to the present invention includes a heat providing system (100) that provides heat required for methane pyrolysis for producing cyan hydrogen, an LNG storage tank (200) that supplies methane as a material, a cyan hydrogen production system (300) that produces cyan hydrogen and carbon through pyrolysis of methane, a carbon storage tank (400) that stores the carbon produced here, a fuel cell (500) and a hydrogen engine system (700) that utilize cyan hydrogen, and a combined heat and power system (co-gen) (600) for integrated energy management. Electricity and heat are produced in the fuel cell (500), the combined heat and power system (600), and the hydrogen engine system (700), which can be supplied to users in the form of electric energy and thermal energy through a grid (800) and a hot water tank (900).

[0039] The heat supply system (100) obtains heat from outside the system and provides it to the cyan hydrogen production system (100). The cyan hydrogen production system (100) uses this heat to thermally decompose methane.

[0040] Methane is stored in the LNG storage tank (200). The form stored here is not limited to natural gas, and any form containing methane, such as biomethane, may be used. Some of the methane stored in the LNG storage tank (200) flows to the cyanobacterium production system (300) and is thermally decomposed, while another portion flows to the combined heat and power system (600) and is combusted to directly produce electricity and heat.

[0041]

[0042] The cyan hydrogen production system (300) produces cyan hydrogen by thermally decomposing methane. This will be described in detail with reference to FIG. 2.

[0043] The methane to be thermally decomposed flows from the LNG storage tank (200) into the thermal decomposition reactor (330), where it may be preheated while passing through the heat exchanger (310). The methane flowing into the thermal decomposition reactor (330) may be a portion of the methane stored in the LNG storage tank (200) and residual methane, which will be described later, and these are mixed in the gas mixer (320).

[0044] The pyrolysis reactor (330) thermally decomposes the introduced methane without combustion. A significant amount of heat is required, which is supplied from the aforementioned heat supply system (100). The heat supply system (100) may include an external heat source (110) and a renewable energy system (120). In particular, utilizing the renewable energy system (120) is preferred because it is more environmentally friendly.

[0045] In one embodiment of the present invention, if residual heat is generated in the fuel cell (500) and / or hydrogen engine system (700) described below, and it is determined that it is more effective to re-introduce this heat into the pyrolysis reactor (330), this can be selectively utilized. This is indicated by "A" and "B" in FIGS. 1 to 3 . By additionally supplying this heat, the amount of heat required to be introduced from outside for methane pyrolysis can be minimized, making it more effective.

[0046] The pyrolysis reactor (330) may adopt any method for pyrolyzing methane. For example, it may be a plasma reactor, a catalytic reactor, a reactor utilizing molten salt, a liquid metal reactor, etc. In particular, the use of liquid metal is preferred because it allows for more effective separation of hydrogen and carbon.

[0047] Hydrogen and carbon are produced by thermal decomposition in a pyrolysis reactor (330). Hydrogen is produced in a gaseous state, and carbon is produced in a solid state. Unpyrolyzed methane can be discharged in a gaseous form. Therefore, solid carbon is discharged from the solid outlet of the pyrolysis reactor (330), but some of the solid carbon is discharged together with hydrogen and residual methane from the gas outlet. Since the pyrolysis reactor (330) reacts at a very high temperature, both the discharged solid and gas are discharged at high temperatures.

[0048] The gases (hydrogen, carbon, and residual methane) discharged at high temperatures pass through the aforementioned heat exchanger (310) and release heat. The heat exchanger (310) uses this heat to preheat the methane being thermally decomposed, and can also supply heat to the fuel cell (500) and hydrogen engine system (700) described below.

[0049] The gas (hydrogen, carbon, residual methane) that has passed through the heat exchanger (310) has its temperature lowered and passes through the carbon filter (340), and in this process, solid carbon is filtered out.

[0050] The remaining gas (hydrogen, residual methane) from which carbon is removed passes through a compressor (350) and a membrane (360) and is separated into hydrogen and methane.

[0051] The residual methane flows to be thermally decomposed again, is mixed with methane from the LNG storage tank (200) through a gas mixer (320), and is introduced into the thermal decomposition reactor (330).

[0052] Hydrogen filtered through the membrane (360) flows to the fuel cell (500) and hydrogen engine system (700) described later and is used as fuel.

[0053] Meanwhile, the high-temperature solid (carbon) discharged from the pyrolysis reactor (330) also flows into the heat exchanger (370) to provide heat. At this time, it may flow in together with the carbon filtered out by the carbon filter (340). The heat absorbed by the heat exchanger (370), similar to the heat absorbed by the heat exchanger (310), may also supply heat to the fuel cell (500) and hydrogen engine system (700) described below.

[0054] Carbon, whose temperature has been lowered by passing through the heat exchanger (370), flows into a carbon storage tank (400). The carbon flowing here can be transformed into various forms and supplied to consumers.

[0055] To summarize the cyan hydrogen production system (300), methane is introduced as fuel from an LNG storage tank (100), heat is provided from a heat supply system (100), and thermal decomposition is performed. The hydrogen and heat generated in this process are provided to a fuel cell (500) and a hydrogen engine system (700), and carbon is stored in a carbon storage tank (400). In some cases, heat generated from the fuel cell (500) and the hydrogen engine system (700) may be provided to the cyan hydrogen production system (300).

[0056]

[0057] Referring to FIG. 3, a fuel cell (500), a combined heat and power generation system (600), and a hydrogen engine system (700) are described.

[0058] The combined heat and power system (600) may be any conventionally known combined heat and power system. Electricity and heat are produced through combined heat and power generation. Electricity is connected to the grid (800) and supplied as electrical energy to demanders, while heat flows into a hot water tank (900) and is supplied as thermal energy to demanders.

[0059] The stack (510) of the fuel cell (500) is supplied with cyan hydrogen produced in the cyan hydrogen production system (300) and air is separately introduced. No reforming is required for hydrogen supply. Electricity is produced by an electrical reaction in the stack (510) and other gases are discharged. The produced electricity is connected to the grid (800) via an inverter (530). The specific operating principles of the fuel cell (500) are well-known and are therefore omitted.

[0060] The gas generated in the stack (510) includes hydrogen, steam, carbon monoxide, carbon dioxide, and nitrogen. Some of these are fed into the afterburner (520) and combusted. During this process, steam, carbon monoxide, and nitrogen are discharged as exhaust gas. This process generates heat, which is fed into the combined heat and power system (600) and utilized as energy for power generation. In some cases, the heat may be fed into the cyan hydrogen production system (300) and used as a heat source for the pyrolysis reactor (330) (A), or may be used to preheat methane.

[0061] In particular, when the fuel cell (500) is an SOFC, a considerably high-temperature gas is discharged from the stack (510), so heat exchange may be performed directly here by a heat exchanger (not shown), and the heat may be introduced into a combined heat and power system (600) or a cyanobacteria production system (300). Alternatively, it may be directly transferred to a hot water tank (900), or it may preheat hydrogen supplied to a hydrogen engine (710) described later.

[0062] In other words, the heat produced in the afterburner (520) may optionally be fed into the combined heat and power system (600), or used to preheat hydrogen supplied to the stack (510), or used to preheat hydrogen supplied to the hydrogen engine (710), or used to preheat hydrogen supplied to the pyrolysis reactor (330), or supplied as a heat source for the pyrolysis reactor (330).

[0063]

[0064] The hydrogen engine (710) of the hydrogen engine system (700) is supplied with cyan hydrogen produced in the cyan hydrogen production system (300) and combusted. In this process, electricity is produced, which is connected to the grid (800).

[0065] Electricity is generated from a hydrogen engine (710), and the high-temperature exhaust gas generated in the process is fed into a heat recovery unit (720) to recover heat. Some of the recovered heat can be directly provided to a hot water tank (900) connected to a combined heat and power generation system (600).

[0066] When heat exceeding the standard value is recovered in the array recovery device (720), it may be introduced into the cyan hydrogen production system (300) and used as a heat source for the pyrolysis reactor (330) as in the fuel cell (500) (B), or may be used to preheat methane. Alternatively, it may be delivered directly to the combined heat and power system (600), or may preheat hydrogen supplied to the stack (510).

[0067] In other words, the heat produced in the array recovery unit (720) may optionally be fed into the combined heat and power system (600), or used to preheat hydrogen supplied to the stack (510), or used to preheat hydrogen supplied to the hydrogen engine (710), or used to preheat hydrogen supplied to the pyrolysis reactor (330), or supplied as a heat source for the pyrolysis reactor (330).

[0068]

[0069] Meanwhile, the present invention is particularly preferable when operated in a distributed manner.

[0070] That is, the fuel cell (500) and hydrogen engine system (700) are located at the power and heat demand sites, and the integrated control system is distributed by the location of the combined heat and power generation system (600) and the cyan hydrogen production system (300). In other words, one combined heat and power generation system (600) and a cyan hydrogen production system (300) of the local energy management office are operated, and the fuel cell (500) and hydrogen engine system (700) are individually located at each power and heat demand site, such as an industrial complex or a residential area, and are connected. This is because the fuel cell (500) and hydrogen engine system (700) do not require a large space, and because industrial complexes have engines that are operated separately, replacing them with hydrogen engines (710) minimizes facility investment. For this purpose, it is particularly desirable to adopt an engine rather than a turbine.

[0071] Therefore, in a place where a combined heat and power generation system (600) is already in place as a local energy management office, only the green hydrogen production system (300) can be installed, and in an industry or residence that receives electricity and heat from the combined heat and power generation system (600), a fuel cell (500) and a hydrogen engine system (700) can be installed separately, thereby constructing an eco-friendly and energy-efficient system with only a small facility investment cost, which is particularly desirable.

[0072]

[0073] (Explanation of symbols)

[0074] 100: Heat supply system

[0075] 110: External heat source

[0076] 120: Renewable Energy Systems

[0077] 200: LNG storage tank

[0078] 300: Cyanide Production System

[0079] 310: Heat exchanger

[0080] 320: Gas mixer

[0081] 330: Pyrolysis reactor

[0082] 340: Carbon filter

[0083] 350: Compressor

[0084] 360: Membrane

[0085] 370: Heat exchanger

[0086] 400: Carbon storage tank

[0087] 500: Fuel cell

[0088] 510: Stack

[0089] 520: Afterburner

[0090] 530: Inverter

[0091] 600: Combined heat and power system

[0092] 700: Hydrogen Engine System

[0093] 710: Hydrogen Engine

[0094] 720: Array Recovery Machine

[0095] 800: Grid

[0096] 900: Hot water tank

Claims

1. A cyan hydrogen production system (300) that produces cyan hydrogen and heat by introducing a portion of methane and thermally decomposing it; A fuel cell (500) into which cyan hydrogen produced in the above cyan hydrogen production system (300) is introduced and electricity and heat are produced through an electrical reaction; A hydrogen engine system (700) that produces electricity and heat by introducing and combusting cyan hydrogen produced in the above cyan hydrogen production system (300); and A combined heat and power generation system (600) comprising another portion of methane introduced and heat introduced from the fuel cell (500) to produce electricity and heat. An optimal energy management system utilizing cyan hydrogen.

2. In paragraph 1, The above cyan hydrogen production system (300) is A pyrolysis reactor (330) in which some of the above methane is introduced and thermally decomposed to produce and discharge cyan hydrogen and carbon, and further discharge residual methane; A heat exchanger (310) that absorbs heat from the cyan hydrogen, carbon, and residual methane discharged from the above pyrolysis reactor (330); and It includes a heat exchanger (370) that absorbs heat from carbon produced in the above pyrolysis reactor (330), The heat absorbed in the above heat exchanger (310, 370) is provided to the fuel cell (500) and the hydrogen engine system (700). An optimal energy management system utilizing cyan hydrogen.

3. In paragraph 2, Some of the heat absorbed in the above heat exchanger (310) is provided to the fuel cell (500) and the hydrogen engine system (700), Another portion of the heat absorbed in the heat exchanger (310) is provided to preheat a portion of the methane flowing into the thermal decomposition reactor (330). An optimal energy management system utilizing cyan hydrogen.

4. In paragraph 3, The above cyan hydrogen production system (300) is It further includes a carbon filter (340) that filters carbon from the cyan hydrogen, carbon, and residual methane discharged from the above pyrolysis reactor (330), The carbon filtered in the above carbon filter (340) is introduced into the heat exchanger (370) together with the carbon produced in the thermal decomposition reactor (330) and heat is absorbed. An optimal energy management system utilizing cyan hydrogen.

5. In paragraph 4, The above cyan hydrogen production system (300) is After carbon is filtered out in the above carbon filter (340), the remaining cyan hydrogen and residual methane are introduced and a membrane (360) is further included through which the cyan hydrogen is filtered out. The cyan hydrogen filtered from the above membrane (360) is provided to the fuel cell and the hydrogen engine system (700), The residual methane remaining in the above membrane (360) is fed back into the thermal decomposition reactor (330). An optimal energy management system utilizing cyan hydrogen.

6. In paragraph 2, The above fuel cell (500) is A stack (510) into which cyan hydrogen produced in the above cyan hydrogen production system (300) flows to produce electricity; and Including an afterburner (520) that produces heat by introducing a portion of the gas discharged from the above stack (510). An optimal energy management system utilizing cyan hydrogen.

7. In paragraph 6, Another portion of the gas discharged from the above stack (510) is introduced into the above stack (510). An optimal energy management system utilizing cyan hydrogen.

8. In paragraph 6, The above hydrogen engine system (700) is A hydrogen engine (710) that produces electricity and exhaust gas by burning the cyan hydrogen produced in the above cyan hydrogen production system (300); and Including a heat recovery device (720) that recovers heat from exhaust gas produced from the hydrogen engine (710). An optimal energy management system utilizing cyan hydrogen.

9. In paragraph 8, The above combined heat and power generation system (600) is Generating electricity and heat by using another part of the above methane to generate power, and generating power by using the heat generated in the afterburner (520). An optimal energy management system utilizing cyan hydrogen.

10. In paragraph 9, In the grid (800), electricity produced in the stack (510), electricity produced by power generation in the combined heat and power generation system (600), and electricity produced by combustion of the hydrogen engine (710) are introduced to provide electric energy. An optimal energy management system utilizing cyan hydrogen.

11. In paragraph 9, The heat produced during power generation in the combined heat and power generation system (600) and the heat recovered in the heat recovery device (720) are introduced into the hot water tank (900), thereby providing heat energy. An optimal energy management system utilizing cyan hydrogen.

12. In paragraph 9, The heat produced in the above afterburner (520) is optionally or is introduced into the above combined heat and power generation system (600), or Used to preheat hydrogen supplied to the above stack (510), or Used to preheat hydrogen supplied to the above hydrogen engine (710), or Used to preheat hydrogen supplied to the above pyrolysis reactor (330), or Supplied as a heat source for the above pyrolysis reactor (330), An optimal energy management system utilizing cyan hydrogen.

13. In paragraph 9, The heat recovered from the above array recovery device (720) is optionally, or is introduced into the above combined heat and power generation system (600), or Used to preheat hydrogen supplied to the above stack (510), or Used to preheat hydrogen supplied to the above hydrogen engine (710), or Used to preheat hydrogen supplied to the above pyrolysis reactor (330), or Supplied as a heat source for the above pyrolysis reactor (330), An optimal energy management system utilizing cyan hydrogen.

14. In paragraph 1, In the above cyan hydrogen production system (300), a heat providing system (100) is further included that provides heat for thermal decomposition of a portion of the methane, The above heat providing system (100) includes a renewable energy system (110). An optimal energy management system utilizing cyan hydrogen.

15. In paragraph 1, In the above cyan hydrogen production system (300), a carbon storage tank (400) is further included in which carbon produced by thermal decomposition of a portion of the methane is stored. An optimal energy management system utilizing cyan hydrogen.

16. In paragraph 1, The above combined heat and power generation system (600) is separated from the fuel cell (500) and the small engine system (700), so that the energy optimal management system is operated in a distributed manner. An optimal energy management system utilizing cyan hydrogen.

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