AU2021103204A4 - A Gas-Electricity Interconnection System Of A Reversible Fuel Cell Based Upon Compound Gas Conditions - Google Patents
A Gas-Electricity Interconnection System Of A Reversible Fuel Cell Based Upon Compound Gas Conditions Download PDFInfo
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- AU2021103204A4 AU2021103204A4 AU2021103204A AU2021103204A AU2021103204A4 AU 2021103204 A4 AU2021103204 A4 AU 2021103204A4 AU 2021103204 A AU2021103204 A AU 2021103204A AU 2021103204 A AU2021103204 A AU 2021103204A AU 2021103204 A4 AU2021103204 A4 AU 2021103204A4
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- hydrogen
- gas
- fuel cell
- transmission pipeline
- reversible fuel
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- 150000001875 compounds Chemical class 0.000 title claims abstract description 69
- 239000000446 fuel Substances 0.000 title claims abstract description 65
- 230000002441 reversible effect Effects 0.000 title claims abstract description 62
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 175
- 239000007789 gas Substances 0.000 claims abstract description 124
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 114
- 239000001257 hydrogen Substances 0.000 claims abstract description 114
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 71
- 230000005540 biological transmission Effects 0.000 claims abstract description 71
- 239000003345 natural gas Substances 0.000 claims abstract description 52
- 229910002091 carbon monoxide Inorganic materials 0.000 claims abstract description 44
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 43
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000002347 injection Methods 0.000 claims abstract description 24
- 239000007924 injection Substances 0.000 claims abstract description 24
- 238000003860 storage Methods 0.000 claims abstract description 23
- 238000009826 distribution Methods 0.000 claims abstract description 15
- 238000010248 power generation Methods 0.000 claims abstract description 11
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 8
- 230000005611 electricity Effects 0.000 claims description 23
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 6
- 239000001569 carbon dioxide Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 206010030113 Oedema Diseases 0.000 abstract description 2
- 238000005868 electrolysis reaction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000032258 transport Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241001136616 Methone Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- BADXJIPKFRBFOT-UHFFFAOYSA-N dimedone Chemical compound CC1(C)CC(=O)CC(=O)C1 BADXJIPKFRBFOT-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- 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
- H02J15/00—Systems for storing electric energy
- H02J15/008—Systems for storing electric energy using hydrogen as energy vector
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/22—Fuel cells in which the fuel is based on materials comprising carbon or oxygen or hydrogen and other elements; Fuel cells in which the fuel is based on materials comprising only elements other than carbon, oxygen or hydrogen
-
- 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
- C01B3/04—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of inorganic compounds, e.g. ammonia
- C01B3/042—Decomposition of water
- C01B3/045—Decomposition of water in gaseous phase
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/40—Carbon monoxide
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2200/00—Components of fuel compositions
- C10L2200/02—Inorganic or organic compounds containing atoms other than C, H or O, e.g. organic compounds containing heteroatoms or metal organic complexes
- C10L2200/0277—Hydrogen
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2200/00—Components of fuel compositions
- C10L2200/02—Inorganic or organic compounds containing atoms other than C, H or O, e.g. organic compounds containing heteroatoms or metal organic complexes
- C10L2200/0286—Carbon dioxide
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/08—Production of synthetic natural gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
-
- 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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/30—The power source being a fuel cell
-
- 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
- Y02E60/34—Hydrogen distribution
-
- 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
-
- 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
- Y02E60/50—Fuel cells
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Fuel Cell (AREA)
Abstract
of Descriptions
The present invention discloses a gas-electricity interconnection system of a reversible fuel
cell based upon compound gas conditions, which consists of a reversible fuel cell and a natural
gas transmission pipeline connected to the reversible fuel cell through a
hydrogen-methane-carbon monoxide transmission pipeline, both of which are connected
hydrogen refueling station and hydrogen storage tank respectively through a hydrogen
transmission pipeline. In addition, there is a pressure reducing station is equipped at the upstream
of the pipeline point of hydrogen-methane-carbon monoxide transmission pipeline connected to
the natural gas transmission pipeline, and it also includes a power grid connected to the
reversible fuel cell and the natural gas transmission pipeline; moreover, the reconstructed
compound gas pipeline and users located at the downstream constitute a natural gas distribution
network containing injected hydrogen, methane and carbon monoxide. Without changing the
existing technical conditions, the injection ratio of hydrogen should not exceed 17%, meanwhile,
an injection ratio which is higher than that by injecting pure hydrogen can be obtained through
injecting a compound gas composed of hydrogen, methane and carbon monoxide into the natural
gas transmission pipeline network, so that it can increase the overall injected volume of fuel, and
thus improve the whole power of electricity-to-gas of the system.
Drawings of Descriptions
HydrogenfefielingStation aine - - - - - - - - - - - - - - - - - - - - - - - - - -
Pressure Reducing
StationofNatural Gas
Pipeline for Hydrop-Metlae-Carbom RestructuredCompoundGas pipeline
rasmittig the Hydrgen Monoxide Transmission Pipeline
14 - , User
0 (Gas Injection Station
Hydrogen Storage Tank
Reversible
Fuel Cell 1User
Natural Gas Distribution Network Containing
Power Grid Combined Heat and Injected Hydrogen, Methane and Carbon
Monoxide
Power Generation
Figure 1
Description
Drawings of Descriptions
HydrogenfefielingStation aine - - - - - - - - - - - - - - - - - - - - - - - - - -
Pressure Reducing StationofNatural Gas
Pipeline for Hydrop-Metlae-Carbom RestructuredCompoundGas pipeline rasmittig the Hydrgen Monoxide Transmission Pipeline 14 -, User 0 (Gas Injection Station
Hydrogen Storage Tank
Reversible Fuel Cell 1User
Natural Gas Distribution Network Containing
Power Grid Combined Heat and Injected Hydrogen, Methane and Carbon Monoxide Power Generation
Figure 1
Descriptions
A Gas-electricity Interconnection System of a Reversible Fuel Cell Based Upon Compound Gas Conditions
Technical Field
[0001] The present invention relates to the cross field of electricity/gas multi-energy systems and the management of new clean energy, particularly to a gas/electricity interconnection system of a reversible fuel cell based upon compound gas conditions.
Background Technology
[0002] Facing the problems including the depletion of fossil energy and the environmental pollution occurred in current society, and for the purpose of realizing the optimal control and efficient utilization of various energy, the multi-energy system which tightly couples multiple energy flows including electricity, heat, and gas becomes the development trend of the form of energy in future. Thus, it is necessary to establish a new energy system which integrates source, storage and load.
[0003] With the increasing shortage of energy, the hydrogen energy source, which has advantages of having abundant sources, being renewable and with properties of high energy density and clean combustion, is considered as a clean energy with unlimited development potential in the 21st century. However, it is urgently to address such problems as high production cost and hard to transportation and storage.
[0004] Hydrogen is an extremely unstable and explosive substance, which is usually stored by means of high-pressure or lower temperature liquefaction, and stored in a hydrogen storage tank in the form of high compression ratio. However, such process is inadvisable due to the energy consummation of which is extremely energy. In addition, as using such method to store hydrogen may cause the problem of poor safety, the hydrogen storage tank has to be kept away from downtown, furthermore, the hydrogen storage capacity is limited, and the construction cost of a large-scale hydrogen storage device is high as well as it is inconvenient to transport.
[0005] The large-scale and stable transportation of hydrogen dependents on constructing expensive hydrogen transmission pipelines, however, due to hydrogen and methane have significant differences in terms of energy density, heat value, and permeability, making use of natural gas pipeline networks to transmit hydrogen energy is a more economical method. In addition, when the hydrogen content is less than 17%, it will not cause adverse effect on the existing natural gas transmission pipeline facilities, but it limits the power of hydrogen production and the efficacy of energy interconnection.
Summary of the Invention
Descriptions
[0006] In order to make up for the aforesaid shortcomings existed in the prior art, the purpose of the present invention is to provide a gas/electricity interconnection system of a reversible fuel cell based upon compound gas conditions to overcome the shortcomings of the prior art.
[0007] The present invention is implemented through following technical scheme.
[0008] A gas-electricity interconnection system of a reversible fuel cell based upon compound gas conditions, characterized in that consisting of:
[0009] A reversible fuel cell, which is utilized to inject the produced hydrogen, methane, and carbon monoxide into a natural gas transmission pipeline through a gas injection station, and thus increases the injected volume of hydrogen, so that improves the power of producing gas by utilizing electricity;
[0010] A hydrogen refueling station, which is directly connected with the hydrogen produced by the reversible fuel cell through a hydrogen transmission pipeline, and thus replenishes the gas into the hydrogen refueling station;
[0011] A hydrogen storage tank, which is utilized to store hydrogen that can be supplied during local peak load period in small hydrogen storage tank;
[0012] A natural gas distribution network, which connects to the gas injection station and users through restructured compound gas pipelines, and thus constitutes a natural gas distribution network containing injected hydrogen, methane and carbon monoxide.
[0013] Further, the hydrogen is injected and mixed at a ratio of less than 17% into the said restructured compound gas pipelines, and the air pressure existed anywhere should be less than the gas pressure in the natural gas transmission pipeline.
[0014] Further, the specific constraints on the mixed gas existed anywhere in the reconstructed compound gas distribution pipelines are as follows:
[0015][001 ] ,'''°""+ gmethone+Injd " 4+ < 0.17 Inj,'+ Inj,cn + Inco, 0
[0016] p,RCP nkmpNP
[0017] Wherein, Inj,'Yd indicates the hydrogen content contained in the reconstructed compound gas pipelines at the time of t; E,methone indicates the content of natural gas flowing through per unit time in the reconstructed compound gas pipelines at the time of t; Inj,c4 indicates the methane content flowing through per unit time in the reconstructed compound gas pipelines at the time of t; and Inj,Cindicates the content of carbon monoxide flowing through per unit time in the reconstructed compound gas pipelines at the time of t; in addition, _RCP NP PR and 0N indicate the air pressure in the reconstructed compound gas pipelines and the natural gas transmission pipeline respectively; and k' represents the safety margin.
[0018] Further, there is a pressure reducing station is equipped at the upstream of the said natural gas transmission pipeline.
[0019] Further, the said reversible fuel cell is connected to the natural gas transmission
Descriptions
pipeline through a hydrogen-methane-carbon monoxide transmission pipeline, and the said hydrogen-methane-carbon monoxide transmission pipeline is connected to the natural gas transmission pipeline through a gas injection station.
[0020] The pressure reducing station is equipped at the upstream of the gas injection station and should be adjacent to the gas injection station. Wherein, the pressure reducing station can be utilized as the separation node between the natural gas transmission pipeline and the reconstructed compound gas pipeline, and the upstream of the pressure reducing station is connected to the natural gas transmission pipeline.
[0021] Further, the said reversible fuel cell is connected to the power grid.
[0022] Further, the reversible fuel cell is connected to the hydrogen refueling station and the hydrogen storage tank through a hydrogen transmission pipeline respectively.
[0023] Further, during the off-peak load period, the grid power is utilized to apply reverse voltage to the fuel cell to convert it into an electrolytic cell, i.e., facilitate the high-temperature water vapor and the carbon dioxide to produce the compound gas composed of hydrogen, methane and carbon monoxide by utilizing electric energy generated during the off-peak load period; in addition, during the peak load period, the reversible fuel cell can make use of the compound gas composed of hydrogen, methane and carbon monoxide to generate electricity and supply power and heating by means of the combined heat and power generation, and deliver the surplus electric energy to the power grid.
[0024] As the present invention adopts the aforesaid technical scheme, it has following beneficial effects:
[0025] The gas-electricity interconnection system of a reversible fuel cell based upon compound gas conditions of the present invention transports the compound gas of hydrogen, methane and carbon monoxide produced by the electrolysis of the reversible fuel cell outwards along the natural gas transmission pipeline network in the form of injection, which can effectively reduce the storage cost of hydrogen; in addition, without changing the existing technical conditions, the injection ratio of hydrogen should not exceed 17%, meanwhile, an injection ratio which is higher than that by injecting pure hydrogen can be obtained through injecting a compound gas composed of hydrogen, methane and carbon monoxide into the natural gas transmission pipeline network, so that it can increase the overall injected volume of fuel, and thus improve the whole power of electricity-to-gas of the system.
[0026] In addition, the present invention also gets rid of the construction of large-scale hydrogen transmission pipelines, and reduces the costs of hydrogen transmission and infrastructure, as well as facilitates the bi-directional flow of two kinds of energy flows of electricity and gas, and deepens the degree of coupling between the power grid and the gas grid, so that not only improves the efficiency of energy use, but also improves the efficacy of energy interconnection.
[0027] Furthermore, the reversible fuel cell also can make use of the compound gas obtained through electrolysis to generate electricity. Wherein, the reversible fuel cell can be utilized as the prime mover and the energy storage device at the same time, which can absorb the new energy and the electric energy generated during the off-peak load period by means of high-efficiency methods of combined heat and power generation and electricity-to-gas, and
Descriptions
thus realize energy conservation and pollution reduction. Furthermore, taking advantage of the time-of-use gas price policy and producing and distributing hydrogen energy at low cost, it also can fully tap the potentiality and positivity of hydrogen production by users, and promote the utilization of clean energy such as hydrogen and methane energy. On the basis of the power generation and the alternate operation of electrolysis of the reversible fuel cell, the flowing gas would also be alternately reversed, so that it can avoid the possibility of carbon deposit.
[0028] The hydrogen, methane and carbon monoxide produced by the system of the present invention, i.e., the reversible fuel cell, can be injected into the natural gas transmission pipeline through the gas injection station, so that it can increase the injected volume of hydrogen, and thus improve the power of utilizing electricity to produce gas. In addition, the hydrogen produced by the reversible fuel cell also can be directly connected to the hydrogen refueling station through a hydrogen transmission pipeline, and thus replenish the gas into the hydrogen refueling station or store it in a small hydrogen storage tank. During the off-peak load period, the local electric heating load is supplied by the power grid, meanwhile, the reverse voltage would be applied to the reversible fuel cell to convert it into a high-temperature electrolytic cell, then, the purchased electric energy is utilized to electrolyze the high-temperature water vapor and the carbon dioxide into a compound gas composed of hydrogen, methane and carbon monoxide, all of which are simultaneously transported outwards; during the peak load period, the reversible fuel cell can make use of the compound gas to generate electricity, and thus provide local users with electricity and heating load. Moreover, the insufficient part would be purchased from the power grid to supplement, and the surplus electricity can be sold to the power grid, as well as the time-of-use distribution of gas and electricity can be implemented, and thus a cycle chain of hydrogen energy transmission can be formed; meanwhile, the compound gas of hydrogen, methane and carbon monoxide produced by the reversible fuel cell also can be used as fuel for power generation directly. Thus, the present invention can reduce the cost of hydrogen storage and transmission effectively, and deepen the degree of coupling between the power grid and the gas grid by means of the bi-directional flow of two kinds of energy flows of electricity and gas, and thus facilitate the utilization of clean energy and energy conservation and pollution reduction.
Brief Description of the Drawings
[0029] The drawings described herein are used to further illustrate the present invention, which constitute an integral part of this application, rather than imposing improper restrictions on the present invention. In the drawings:
[0030] Figure 1 is a structural schematic diagram of the system of the present invention.
Detailed Description of the Presently Preferred Embodiments
[0031] The text below will describe the present invention in detail in conjunction with the accompanying drawings and specific embodiments. All exemplary embodiments and specifications of the present invention are used to explain the present invention, rather than
Descriptions
imposing restrictions on the present invention.
[0032] As shown in figure 1, which consists of a reversible fuel cell and a natural gas transmission pipeline connected to the reversible fuel cell through a hydrogen-methane-carbon monoxide transmission pipeline, both of which are connected hydrogen refueling station and hydrogen storage tank respectively through a hydrogen transmission pipeline. In addition, there is a pressure reducing station is equipped at the upstream of the pipeline point of hydrogen-methane-carbon monoxide transmission pipeline connected to the natural gas transmission pipeline, and it also includes a power grid connected to the reversible fuel cell and the natural gas transmission pipeline; moreover, the reconstructed compound gas pipeline and users located at the downstream constitute a natural gas distribution network containing injected hydrogen, methane and carbon monoxide. In addition, a circuit can be formed based upon the restructured compound gas pipelines and the reversible fuel cell; and the hydrogen-methane-carbon monoxide transmission pipeline is connected to the natural gas transmission pipeline through a gas injection station.
[0033] The reversible fuel cell produces hydrogen by electrolyzing high-temperature water vapor. meanwhile, it produces methane and carbon monoxide by electrolyzing carbon dioxide and high-temperature water vapor. Then, the produced compound gas composed of hydrogen, methane and carbon monoxide is transported outwards together. In addition, the reversible fuel cell also can make use of compound gas to generate electricity, and the generated direct current would be connected to the power grid through a DC\AC converter.
[0034] The natural gas transmission pipeline connected to the hydrogen-methane-carbon monoxide pipeline is the reconstructed compound gas pipeline and the reconstructed compound gas pipeline would be connected to users, which is utilized to transport the mixed gas of natural gas and hydrogen, and provide the mixed gas contained to other loads of user, which also can be supplied to the fuel cell system itself; in addition, the reconstructed compound gas pipeline and users located at the downstream constitute a natural gas distribution network containing injected hydrogen, methane and carbon monoxide.
[0035] The reversible fuel cell is connected to the hydrogen refueling station and the hydrogen storage tank through a hydrogen transmission pipeline respectively, and is connected to the gas injection stations through the hydrogen-methane-carbon monoxide transmission pipeline.
[0036] The reversible fuel cell can be utilized to supply energy and produce hydrogen, methane and carbon monoxide by means of the combined heat and power generation.
[0037] The pressure reducing station is equipped at the upstream of the gas injection station and should be adjacent to the gas injection station. Wherein, the pressure reducing station can be utilized as the separation node between the natural gas transmission pipeline and the reconstructed compound gas pipeline, and the upstream of the pressure reducing station is connected to the natural gas transmission pipeline, which is utilized to decrease the pressure in the natural gas transmission pipeline, prevent the mixed gas after injecting the compound gas from backflowing to the high-pressure natural gas transmission pipeline, and provide the necessary medium and low pressure environment for injecting the compound gas.
Descriptions
[0038] The reversible high-temperature fuel cell adopts a set of devices to complete power generation and gas production, which can directly make use of the compound gas to generate electricity. During the peak load period, the reversible fuel cell can implement the supply of power and heating by means of the combined heat and power generation, and deliver the surplus electric energy to the power grid; during the off-peak load period, it will make use of the electric energy of power grid to apply reverse voltage to convert it into the electrolytic cell, and then transform the high-temperature water vapor into hydrogen for sale or storage, as well as transform the carbon dioxide and high-temperature water vapor into methane and carbon monoxide for use; most of the hydrogen and methane produced by the reversible high-temperature fuel cell would be transported to the gas injection station through the hydrogen transmission pipeline or the methane transmission pipeline, and then to be injected into the natural gas transmission pipeline, and the remaining hydrogen will be directly connected to the hydrogen refueling station nearby through the short-distance hydrogen transmission pipeline for replenishing the gas into the hydrogen refueling station, or to be stored in small hydrogen storage tanks for use during peak load period.
[0039] The natural gas distribution network containing injected hydrogen, methane and carbon monoxide relies on the existing infrastructure and pipelines, and the hydrogen is injected and mixed at a ratio of less than 17% into the restructured compound gas pipelines, as well as the air pressure existed anywhere should be less than the gas pressure in the natural gas transmission pipeline, furthermore, the specific constraints on the mixed gas existed anywhere in the reconstructed compound gas distribution pipeline are as follows: fn]It <0.17
[0040] E"ethone+jd +Icnj'4 +n 0
[0041] RCP<km NP
[0042] Wherein, Injyd indicates the hydrogen content contained in the reconstructed compound gas pipeline at the time of t; Engethone indicates the content of natural gas flowing through per unit time in the reconstructed compound gas pipeline at the time of t; Inj,CH4 indicates the methane content flowing through per unit time in the reconstructed compound gas pipeline at the time of t; and Injco indicates the content of carbon monoxide flowing through per unit time in the reconstructed compound gas pipeline at the time of t; in addition, _RCP NVP PR and A2NP indicate the air pressure in the reconstructed compound gas pipeline and the natural gas transmission pipeline respectively; and k" represents the safety margin.
[0043] During the off-peak load period, the local electric heating load is supplied by the power grid, meanwhile, the reverse voltage would be applied to the reversible fuel cell to convert it into a high-temperature electrolytic cell, then, the purchased electric energy is utilized to electrolyze the high-temperature water vapor and the carbon dioxide into a compound gas composed of hydrogen, methane and carbon monoxide, all of which are simultaneously transmitted outwards; during the peak load period, the reversible fuel cell can make use of the compound gas produced during the off-peak load period to generate
Descriptions
electricity, and thus provide local users with electricity and heating load. Moreover, the insufficient part would be purchased from the power grid to supplement, and the surplus electricity can be sold to the power grid, as well as the time-of-use distribution of gas and electricity can be implemented, and thus a cycle chain of hydrogen energy transmission can be formed; Thus, the present invention can reduce the cost of hydrogen storage and transmission effectively, and deepen the degree of coupling between the power grid and the gas grid by means of the bi-directional flow of two kinds of energy flows of electricity and gas, and thus facilitate the utilization of clean energy and energy conservation and pollution reduction.
[0044] The output gas of reversible fuel cell is hydrogen, methane and carbon monoxide, and the output hydrogen would be divided into three parts for processing:
[0045] The first part will be transported to the gas injection station through the hydrogen-methane-carbon monoxide transmission pipeline, and then, the hydrogen will be injected into the natural gas transmission pipeline through the gas injection station; the second part will be transported to the hydrogen refueling station nearby through the hydrogen transmission pipeline for refueling the hydrogen energy automobile; and the third part will be stored in small hydrogen storage tanks; meanwhile, the output methane and carbon monoxide are injected into the natural gas transmission pipeline through the hydrogen-methane-carbon monoxide transmission pipeline.
[0046] The input fuel gas of the reversible fuel cell can be used to supply the local heating and power load, and the input fuel gas can be divided into two parts:
[0047] The first part is the pure hydrogen input from the hydrogen storage tank; and the second part is the mixed combustible substance of the compound gas input from the reconstructed compound gas pipelines.
[0048] The gas injection station is utilized to pressurize the hydrogen, methane and carbon monoxide produced by means of the electrolysis of the reversible fuel cell and then inject them into the natural gas transmission pipeline to form a reconstructed compound gas pipeline, which can be utilized to provide various users at the downstream and the fuel cell system itself with the compound gas fuel, and make it supply energy through making use of the compound gas by means of the combined heat and power generation during peak load period, and thus a transmission cycle chain of clean energy can be formed.
[0049] The present invention is not limited to the aforesaid embodiments, in addition, based upon the technical scheme disclosed in the present invention, those skilled in the art can make some replacements and variations to certain technical features according to the disclosed technical content without performing creative labor. Deformations, and such replacements and variations shall fall within the protection scope of the present invention.
EDITORIAL NOTE 2021103204
There are 2 pages of claims only.
Claims (8)
1. A gas-electricity interconnection system of a reversible fuel cell based upon compound gas conditions, characterized in that consisting of: a reversible fuel cell, which is utilized to inject the produced hydrogen, methane, and carbon monoxide into a natural gas transmission pipeline through a gas injection station, and thus increases the injected volume of hydrogen, so that improves the power of producing gas by utilizing electricity;
A hydrogen refueling station, which is directly connected with the hydrogen produced by the reversible fuel cell through a hydrogen transmission pipeline, and thus replenishes the gas into the hydrogen refueling station; A hydrogen storage tank, which is utilized to store hydrogen that can be supplied during local peak load period in small hydrogen storage tank; A natural gas distribution network, which connects to the gas injection station and users through restructured compound gas pipelines, and thus constitutes a natural gas distribution network containing injected hydrogen, methane and carbon monoxide.
2. The said gas-electricity interconnection system of a reversible fuel cell based upon compound gas conditions according to claim 1, characterized in that the hydrogen is injected and mixed at a ratio of less than 17% into the said restructured compound gas pipelines, and the air pressure existed anywhere should be less than the gas pressure in the natural gas transmission pipeline.
3. The said gas-electricity interconnection system of a reversible fuel cell based upon compound gas conditions according to claim 1 or 2, characterized in that the specific constraints on the mixed gas existed anywhere in the reconstructed compound gas distribution pipeline are as follows:
IniPd< 0.17 Enethone"+'In°yd"+ InCH 4 ICO~
pRCP NP A<kopt
Wherein, Inj'yd indicates the hydrogen content contained in the reconstructed compound gas pipelines at the time of t; Em''o" indicates the content of natural gas flowing through per unit time in the reconstructed compound gas pipelines at the time of t; InjcH' indicates the methane content flowing through per unit time in the reconstructed compound gas pipelines at the time of t; and Inj, indicates the content of carbon monoxide flowing through per unit time R Cp NP in the reconstructed compound gas pipelines at the time of t; in addition, P and At indicate the air pressure in the reconstructed compound gas pipelines and the natural gas transmission pipeline respectively; and km represents the safety margin.
4. The said gas-electricity interconnection system of a reversible fuel cell based upon compound gas conditions according to claim 1, characterized in that there is a pressure reducing station is equipped at the upstream of the said natural gas transmission pipeline.
Claims
5. The said gas-electricity interconnection system of a reversible fuel cell based upon compound gas conditions according to claim 1, characterized in that the said reversible fuel cell is connected to the natural gas transmission pipeline through a hydrogen-methane-carbon monoxide transmission pipeline, and the said hydrogen-methane-carbon monoxide transmission pipeline is connected to the natural gas transmission pipeline through a gas injection station.
6. The said gas-electricity interconnection system of a reversible fuel cell based upon compound gas conditions according to claim 1, characterized in that the said reversible fuel cell is connected to the power grid.
7. The said gas-electricity interconnection system of a reversible fuel cell based upon compound gas conditions according to claim 1, characterized in that the reversible fuel cell is connected to the hydrogen refueling station and the hydrogen storage tank through a hydrogen transmission pipeline respectively.
8. The said gas-electricity interconnection system of a reversible fuel cell based upon compound gas conditions according to claim 7, characterized in that, during the off-peak load period, the grid power is utilized to apply reverse voltage to the fuel cell to convert it into an electrolytic cell, i.e., facilitate the high-temperature water vapor and the carbon dioxide to produce the compound gas composed of hydrogen, methane and carbon monoxide by utilizing electric energy generated during the off-peak load period; in addition, during the peak load period, the reversible fuel cell can make use of the compound gas composed of hydrogen, methane and carbon monoxide to generate electricity and supply power and heating by means of the combined heat and power generation, and deliver the surplus electric energy to the power grid.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115285994A (en) * | 2022-08-12 | 2022-11-04 | 青岛大学 | High-efficiency low-energy-consumption ship CO 2 Trapping-membrane analysis-mineralization fixation system and method |
| CN117060492A (en) * | 2023-10-12 | 2023-11-14 | 武汉大学 | Optimization method and equipment for gas-electricity coupling system considering air pressure fluctuation characteristic of pipeline |
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2021
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115285994A (en) * | 2022-08-12 | 2022-11-04 | 青岛大学 | High-efficiency low-energy-consumption ship CO 2 Trapping-membrane analysis-mineralization fixation system and method |
| CN115285994B (en) * | 2022-08-12 | 2023-07-25 | 青岛大学 | Efficient low-energy consumption ship CO2 capturing-membrane desorption-mineralization fixing system and method |
| CN117060492A (en) * | 2023-10-12 | 2023-11-14 | 武汉大学 | Optimization method and equipment for gas-electricity coupling system considering air pressure fluctuation characteristic of pipeline |
| CN117060492B (en) * | 2023-10-12 | 2023-12-22 | 武汉大学 | Optimization method and equipment for gas-electricity coupling system considering air pressure fluctuation characteristic of pipeline |
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