CN113824153A - Electric power energy system under underground space supports - Google Patents
Electric power energy system under underground space supports Download PDFInfo
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- CN113824153A CN113824153A CN202111275709.9A CN202111275709A CN113824153A CN 113824153 A CN113824153 A CN 113824153A CN 202111275709 A CN202111275709 A CN 202111275709A CN 113824153 A CN113824153 A CN 113824153A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/32—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air
- C01B3/34—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents
- C01B3/36—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents using oxygen or mixtures containing oxygen as gasifying agents
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/15—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of oxides of carbon exclusively
- C07C29/151—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of oxides of carbon exclusively with hydrogen or hydrogen-containing gases
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/133—Renewable energy sources, e.g. sunlight
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P30/00—Technologies relating to oil refining and petrochemical industry
Abstract
An electric power energy system supported by underground space comprises a renewable energy generator set and a transcritical CO2Energy storage system, natural gas reforming hydrogen production system and CO2The hydrogenated methanol synthesis device comprises a renewable energy power generator set connected with a first confluence box, wherein the first confluence box is divided into three paths, and one path is connected with transcritical CO2The energy storage system is connected, the other path is connected with the water electrolysis hydrogen production energy storage system, and the trans-critical CO is2Energy storage system and electrolytic water hydrogen production energy storageThe systems are all connected with a natural gas reforming hydrogen production system, and the water electrolysis hydrogen production energy storage system is also connected with CO2The hydrogenated methanol synthesis device is connected; and the third path of the first combiner box is connected with an electric device. The underground space is taken as a key link of low-carbon transformation in the field of electric power energy, the method is fully coupled with the existing emission reduction and sink increase measures, and provides space support which is needed urgently for carbon source emission reduction and carbon sink increase by depending on the functional characteristics of the method, such as closure, stability, protection and the like, so that the scale benefit of system development is improved.
Description
Technical Field
The invention belongs to the technical field of energy, and particularly relates to an electric power energy system supported by an underground space.
Background
In order to solve the increasingly severe climate change problem, China proposes the strategic targets of carbon peak reaching and carbon neutralization, and depicts a great blueprint for national climate control and energy low-carbon transformation. Specifically, the accumulation of greenhouse gases needs to be reduced from two angles of carbon source emission reduction and carbon sink capacity increase, and clean low-carbon transformation of human society is promoted. Primary energy consumption is a main carbon source in human society, and energy industry represented by electric power system is CO2The key field of isothermal chamber gas emission realizes emission reduction and sink increase from the source, and has important significance for realizing the aim of 'double carbon'.
The existing electric power energy system is explored and developed in the aspect of low carbon emission reduction, and integrates part of traditional emission reduction and convergence increasing technologies, such as wind, light and other clean energy power generation technologies, electromagnetic energy storage, compressed air energy storage, water pumping energy storage and other energy storage technologies, carbon capture, utilization and sequestration (CCUS) technologies and the like, so that energy cascade utilization and renewable energy consumption are promoted, and the improvement of energy utilization efficiency and the reduction of carbon emission level are realized. However, various measures for reducing emission and increasing sink have defects and restrictions in the aspects of technical principles, application environments, equipment matching and the like, and further improvement of low-carbon benefits faces challenges, including large-scale, safe and stable heterogeneous material storage and equipment running space shortage, limited earth surface ecological space for playing the ecological carbon sink function, and incomplete market system for promoting reasonable resource allocation. Therefore, a development idea needs to be converted, and a way for breaking through the current bottleneck of emission reduction and sink increase technology is sought.
The underground space is used as an important soil space resource, has functional characteristics of sealing property, stability, protection property and the like, can realize large-scale storage of multi-phase substances, support safe and stable operation of an energy system, promote efficient utilization of resources, and improve the carbon sequestration capacity of an ecological system by replacing the corresponding earth surface ecological space, so that the underground space has great potential of emission reduction and sink increase. The invention fully couples the underground space with the existing measures of emission reduction and convergence increase, provides an electric power energy system supported by the underground space, and aims to provide a new energy low-carbon development and utilization mode driven by a double-carbon target.
Disclosure of Invention
The invention aims to provide an electric energy source system supported by an underground space.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
an electric power energy system supported by underground space comprises a first confluence box, a second confluence box, a renewable energy generator set and a transcritical CO2Energy storage system, natural gas reforming hydrogen production system and CO2The hydrogenated methanol synthesis device comprises a renewable energy power generator set connected with a first confluence box, wherein the first confluence box is divided into three paths, and one path is connected with transcritical CO2The energy storage system is connected, the other path is connected with the water electrolysis hydrogen production energy storage system, and the trans-critical CO is2The energy storage system and the water electrolysis hydrogen production energy storage system are both connected with the natural gas reforming hydrogen production system, and the water electrolysis hydrogen production energy storage system is also connected with CO2The hydrogenated methanol synthesis device is connected; and the third path of the first combiner box is connected with an electric device.
Further, the renewable energy generator set is connected with the first combiner box through the DC/DC converter; and the third path of the first confluence box is connected with the electric device through the second confluence box.
Further, trans-critical CO2The energy storage system comprises CO2Underground reservoirs and compressors; the first combiner box is connected with a compressor, and the compressor is connected with CO2Underground reservoirs are connected.
Further, the energy storage system for producing hydrogen by electrolyzing water comprises an electrolytic cell and H2A subterranean reservoir; the first header box is connected with an electrolytic cell, and the electrolytic cell is connected with H2Underground reservoirs are connected.
Further, the natural gas reforming hydrogen production system comprises a natural gas reformer; the natural gas reformer is provided with an oxygen inlet and a natural gas inletThe electrolytic cell is connected with an oxygen inlet of the natural gas reformer, the natural gas inlet is connected with a natural gas pipeline, and a first electromagnetic valve is arranged on the natural gas pipeline; carbon dioxide outlet and CO2The underground storage is connected with the hydrogen outlet which is connected with a pressure swing adsorber, and the pressure swing adsorber is connected with H through a third electromagnetic valve2Underground reservoirs are connected.
Further, a second electromagnetic valve is arranged between the natural gas reformer and the electrolytic cell.
Further, the electric power utilization device comprises an external power grid and an underground load, CO2The hydrogenation methanol synthesis device is also connected with an underground load.
Further, CO2The hydrogenation methanol synthesis device comprises a reverse water gas device, a compressor and a methanol reactor; the water electrolysis hydrogen production energy storage system is connected with a reverse water gas device, the reverse water gas device is connected with a compressor, and the compressor is connected with an inlet of the methanol reactor; the outlet of the methanol reactor is connected with underground loads such as subway and the like.
Further, the outlet of the methanol reactor is connected with underground loads such as subways and the like through a sixth electromagnetic valve; underground loads such as subways and the like are also connected with ground source heat pumps.
Compared with the prior art, the invention has the beneficial effects that: when the energy side load is in a low ebb period or the renewable energy is abundant and the risk of wind and light abandonment exists, the surplus electric energy generated by the renewable energy generator set can be input into the electric energy system supported by the underground space, the high-purity green hydrogen is prepared by the water electrolysis hydrogen production and energy storage system, and the prepared hydrogen can be stored. The high-purity oxygen associated with the hydrogen production by water electrolysis can be input into a natural gas reforming hydrogen production system and is subjected to partial oxidation reaction with methane to generate hydrogen and CO2The prepared hydrogen can also be used as an energy storage resource for centralized storage. CO produced by reforming natural gas to produce hydrogen2Besides direct sequestration, it can also be used as transcritical CO2The energy storage medium of the energy storage system and the water electrolysis hydrogen production energy storage system run cooperatively to provide absorption support for the excess electric energy of the system. The invention takes the underground space as the key link of low-carbon transformation in the field of electric power energy sourcesThe method has the advantages that emission reduction and sink increase measures are fully coupled, and by means of the functional characteristics of the method, such as closure, stability, protection and the like, space support which is needed urgently is provided for carbon source emission reduction and carbon sink increase, and the scale benefit of system development is improved.
Furthermore, by realizing various renewable energy generating sets, a water electrolysis hydrogen production energy storage system and a transcritical CO2The energy storage system is cooperatively coupled with the underground load, so that the renewable energy consumption and the coordinated utilization of various heterogeneous energy sources are promoted, and the technical support is provided for low carbon emission reduction.
Drawings
Fig. 1 is a schematic structural diagram of an electric energy system supported by an underground space.
Fig. 2 is a flow chart of an electric energy system supported by an underground space.
In the figure: 1. solar photovoltaic panel, 2.DC/DC converter, 3. first combiner box, 4. second combiner box, 5.DC/AC inverter, 6.CO2Underground storage, 7, a first electromagnetic valve, 8, a first compressor, 9, a natural gas reformer, 10, a second electromagnetic valve, 11, a pressure swing adsorber, 12, an electrolytic cell, 13, a third electromagnetic valve, 14, a fourth electromagnetic valve, 15, a hydrogen fuel cell, 16, a fifth electromagnetic valve, 17, H2Underground storage, 18 reverse water gas devices, 19 second compressors, 20 sixth electromagnetic valves, 21 methanol reactors, 22 underground loads, 23 ground source heat pumps and 24 underground heat storage systems.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments, but not all embodiments, of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides an electric power energy system supported by underground space, which comprises a renewable energy power generating set, a hydrogen fuel cell 15 and other various power generating systems, hydrogen production and energy storage by water electrolysis, and transcritical CO2The energy storage device and the underground heat storage device are used for storing energy, storing heat underground and the like, and the multi-load such as underground traffic, underground logistics, underground complex and the like, and the coupling conversion and organic coordination of the multi-class heterogeneous energy flows such as electric energy, hydrogen energy, heat energy and the like are realized in the energy storage device and the underground traffic, the underground logistics, the underground complex and the like. Meanwhile, a natural gas reforming hydrogen production system and CO are planned2The matched equipment such as a hydrogenation methanol synthesis device and the like realizes the oxygen and CO generated in the system operation2And the by-products are captured, sealed and utilized in a value-added manner.
The renewable energy generating set is a main energy supply unit, and various energy storage resources in the electric power energy system supported by the underground space can consume the surplus electric energy of the system.
Referring to fig. 1, the invention provides an electric power energy system supported by an underground space, which comprises a renewable energy generator set, an electrolytic water hydrogen production energy storage system and a transcritical CO2Energy storage system, natural gas reforming hydrogen production system and CO2The hydrogenation methanol synthesis device is characterized in that a renewable energy power generator set is connected with a first confluence box 3 through a DC/DC converter 2, the first confluence box 3 is divided into three paths, and one path is connected with transcritical CO2The energy storage system is connected, the other path is connected with the water electrolysis hydrogen production energy storage system, and the trans-critical CO is2The energy storage system and the water electrolysis hydrogen production energy storage system are both connected with the natural gas reforming hydrogen production system, and the water electrolysis hydrogen production energy storage system is also connected with CO2The hydrogenation methanol synthesis device is connected. The third path of the first combiner box 3 is connected via a second combiner box 4 to the electricity consumers, including the external grid and the underground load 22, CO2The hydromethanol synthesis unit is also connected to an underground load 22.
When the water electrolysis hydrogen production energy storage system is in a charging state, electric energy is input into the electrolytic cell 12 to decompose water into hydrogen and oxygen, and the obtained hydrogen can be input into H2The underground storage 17 stores energy and can be used as clean energy to be directly supplied to an energy utilization side.
The high-purity oxygen associated with hydrogen production by water electrolysis has further development and utilization values. The high-purity oxygen can be input into a natural gas reforming hydrogen production system to generate hydrogen and CO through partial oxidation reaction with methane2The produced hydrogen can also be used as energy storage materialThe sources being stored centrally or supplied directly to the energy side, CO2Underground sequestration may be performed to reduce carbon emissions from system operation.
High concentration high pressure CO produced in energy production process2Besides direct sequestration, it can also be used as transcritical CO2An energy storage medium of the energy storage system. By using CO2Low supercritical pressure and easy liquefaction by CO2The conversion of the state of matter between the gaseous and liquid states enables the storage and release of energy.
CO2The hydrogenation methanol synthesis device is hydrogen and CO2The prepared methanol can be used as low-carbon fuel to supply load energy such as methanol automobiles and the like, and clean electric energy can be provided for the energy utilization side through power generation of a methanol fuel cell.
The ground source heat pump 23 can exploit shallow geothermal energy to meet the heating and refrigerating requirements of underground space projects nearby, and transmission loss caused by long-distance energy transmission is reduced.
The electric energy system supported by the underground space can realize the decoupling of heat energy production and consumption on time and space through the underground heat storage system and the urban cold/hot water pipeline, promote the complementary mutual assistance among different distributed energy systems, enhance the flexibility of system operation and improve the comprehensive utilization efficiency of energy.
Hydrogen, oxygen and CO generated in operation of electric power energy system supported by underground space2The method can directly participate in energy production and storage, and still has diversified development potential: the oxygen can be used in chemical industry and smelting industry to participate in the production of synthetic ammonia and heavy oil high-temperature cracking; CO 22Can be used for producing fire extinguishers and carbonated beverages or used as a quality stabilizer in the metal smelting industry. By coordinating production factors such as products, raw materials and the like, intensive planning development of various production departments is promoted, and an industrial cluster with complementary advantages is constructed.
The natural gas reforming hydrogen production system comprises a natural gas reformer 9 and a second electromagnetic valve 10;
transcritical CO2The energy storage system comprises CO2A subterranean reservoir 6 and a first compressor 8;
CO2the hydrogenation methanol synthesis device comprises a reverse water gas device 18, a second compressor 19, a sixth electromagnetic valve 20 and a methanol reactor 21.
The water electrolysis hydrogen production energy storage system comprises an electrolytic cell 12 and H2Underground storage 17.
The renewable energy power generator set adopts the solar photovoltaic panel 1.
Specifically, referring to fig. 1, the electric energy system supported by the underground space further includes a DC/DC converter 2, a DC/AC inverter 5, a first solenoid valve 7, a pressure swing adsorber 11, a third solenoid valve 13, a fourth solenoid valve 14, a hydrogen fuel cell 15, a fifth solenoid valve 16, an underground load 22, a ground source heat pump 23, and an underground heat storage system 24.
The solar photovoltaic panel 1 is connected with the inlet of the first confluence box 3 through the DC/DC converter 2, the outlet of the first confluence box 3 is divided into three paths, one path is connected with the second confluence box 4, and the other path is connected with CO through the first compressor 82The underground reservoirs 6 are connected; the third path is connected with an electrolytic cell 12, and one path of the electrolytic cell 12 is connected with H2The underground storage 17 is connected, the other path of the electrolytic cell 12 is connected with an oxygen inlet of the natural gas reformer 9 through a second electromagnetic valve 10, the natural gas reformer 9 is further provided with a natural gas inlet, a carbon dioxide outlet and a hydrogen outlet, the natural gas inlet is connected with a natural gas pipeline, the natural gas pipeline is provided with a first electromagnetic valve 7, the carbon dioxide outlet is connected with a CO outlet2The underground storage 6 is connected, the hydrogen outlet is connected with the inlet of the pressure swing adsorber 11, the outlet of the pressure swing adsorber 11 is connected with H through a third electromagnetic valve 132Underground storage 17 connected at the inlet H2The outlet of the underground storage 17 is connected with a reverse water gas device 18, the reverse water gas device 18 is connected with a second compressor 19, the second compressor 19 is connected with the inlet of a methanol reactor 21, the outlet of the methanol reactor 21 is connected with underground loads 22 such as subways through a sixth electromagnetic valve 20, the underground loads 22 such as subways are also connected with a ground source heat pump 23, and the ground source heat pump 23 is connected with an underground heat storage system 24.
The hydrogen fuel cell 15 is connected to the second combiner box 4, the second combiner box 4 is connected to the DC/AC converter 5, and the DC/AC converter 5 is connected to the external grid.
The operation mechanism of the electric energy system supported by the underground space is as follows:
referring to fig. 2, when the energy side load is in the valley period or the renewable energy is abundant and the risk of wind and light abandonment exists, the surplus electric energy generated by the renewable energy generator set can be input into the electric energy system supported by the underground space, the high-purity green hydrogen is prepared by the water electrolysis hydrogen production and energy storage system, and the prepared hydrogen can be input into the H2And energy storage is realized in the underground storage. The high-purity oxygen associated with the hydrogen production by water electrolysis can be input into a natural gas reforming hydrogen production system and is subjected to partial oxidation reaction with methane to generate hydrogen and CO2The prepared hydrogen can also be used as an energy storage resource for centralized storage. CO produced by reforming natural gas to produce hydrogen2Besides direct sequestration, it can also be used as transcritical CO2The energy storage medium of the energy storage system and the water electrolysis hydrogen production energy storage system run cooperatively to provide absorption support for the excess electric energy of the system.
When the load of the energy utilization side is in a peak period or the renewable energy is deficient and the whole system has an energy gap, various energy storage systems in the electric energy system supported by the underground space can provide electric energy for the load side. H2The hydrogen stored in the underground reservoir can be converted into clean electric energy through the hydrogen fuel cell to meet the energy utilization requirement of a load side, and can also be used as clean energy to be directly supplied to the energy utilization side. In addition, hydrogen and CO are generated in the system2Can further pass CO2The hydrogenation methanol synthesis device generates methanol and supplies the methanol to load energy of methanol automobiles and the like. The ground source heat pump can exploit shallow geothermal energy to meet the heating and refrigerating requirements of underground space construction projects nearby, and transmission loss caused by long-distance energy transmission is reduced. The underground heat storage system can realize long-time storage of heat energy, thereby enhancing the flexibility of development and utilization of geothermal energy. The system is connected through various energy channels such as electric energy, hydrogen energy and heat energy, coupling conversion and organic coordination of various heterogeneous energy flows are realized inside the system, the comprehensive utilization efficiency of energy can be effectively improved, and the consumption of renewable energy sources is promoted.
Claims (9)
1. An electrical energy system supported in an underground space, which systemIs characterized by comprising a first combiner box (3), a second combiner box (4), a renewable energy generator set and a transcritical CO2Energy storage system, natural gas reforming hydrogen production system and CO2The hydrogenation methanol synthesis device is characterized in that a renewable energy power generator set is connected with a first confluence box (3), the first confluence box (3) is divided into three paths, and one path is connected with transcritical CO2The energy storage system is connected, the other path is connected with the water electrolysis hydrogen production energy storage system, and the trans-critical CO is2The energy storage system and the water electrolysis hydrogen production energy storage system are both connected with the natural gas reforming hydrogen production system, and the water electrolysis hydrogen production energy storage system is also connected with CO2The hydrogenated methanol synthesis device is connected; the third path of the first combiner box (3) is connected with an electric device.
2. An underground spatial supported electric power energy system according to claim 1, characterised in that the renewable energy generator set is connected to the first combiner box (3) via a DC/DC converter (2); the third path of the first confluence box (3) is connected with the electric device through a second confluence box (4).
3. The underground space supported electric power energy system of claim 1, wherein the transcritical CO is present in the system2The energy storage system comprises CO2An underground storage (6) and a compressor (8); the first confluence box (3) is connected with a compressor (8), and the compressor (8) is connected with CO2Underground reservoirs (6) are connected.
4. An underground space supported electric power energy system according to claim 1, characterised in that the water electrolysis hydrogen production energy storage system comprises an electrolytic cell (12) and H2A subterranean reservoir (17); the first confluence box (3) is connected with an electrolytic cell (12), and the electrolytic cell (12) is connected with H2Underground reservoirs (17) are connected.
5. A subterranean space supported electrical power energy system according to claim 4, wherein the natural gas reforming hydrogen production system comprises a natural gas reformer (9); the natural gas reformer (9) is provided with an oxygen inlet, a natural gas inlet, a carbon dioxide outlet and a hydrogen outletThe electrolytic cell (12) is connected with an oxygen inlet of the natural gas reformer (9), the natural gas inlet is connected with a natural gas pipeline, and a first electromagnetic valve (7) is arranged on the natural gas pipeline; carbon dioxide outlet and CO2The underground storage (6) is connected, the hydrogen outlet is connected with a pressure swing adsorber (11), and the pressure swing adsorber (11) is connected with H through a third electromagnetic valve (13)2Underground reservoirs (17) are connected.
6. An underground supported electric power energy system according to claim 5, characterised in that a second solenoid valve (10) is provided between the natural gas reformer (9) and the electrolytic cell (12).
7. An underground supported electrical power energy system according to claim 1, where the electricity consuming devices include external power grid and underground load (22), CO2The hydrogenation methanol synthesis unit is also connected with an underground load (22).
8. An underground space supported electric power energy system according to claim 7 in which the CO is in the form of CO2The hydrogenation methanol synthesis device comprises a reverse water gas device (18), a compressor (19) and a methanol reactor (21); the water electrolysis hydrogen production energy storage system is connected with a reverse water gas device (18), the reverse water gas device (18) is connected with a compressor (19), and the compressor (19) is connected with an inlet of a methanol reactor (21); the outlet of the methanol reactor (21) is connected with underground loads (22) such as subway and the like.
9. An underground supported electric power energy system according to claim 8, wherein the outlet of the methanol reactor (21) is connected to underground loads (22) such as subways via a sixth electromagnetic valve (20); underground loads (22) such as subways and the like are also connected with a ground source heat pump (23).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115057759A (en) * | 2022-07-11 | 2022-09-16 | 国网河南省电力公司电力科学研究院 | Distributed comprehensive energy system integrating energy storage, hydrogen production and methanol production |
Citations (6)
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