CN114123264A - Method for electrolytic hydrogen production by desert photovoltaic - Google Patents

Method for electrolytic hydrogen production by desert photovoltaic Download PDF

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CN114123264A
CN114123264A CN202111412541.1A CN202111412541A CN114123264A CN 114123264 A CN114123264 A CN 114123264A CN 202111412541 A CN202111412541 A CN 202111412541A CN 114123264 A CN114123264 A CN 114123264A
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hydrogen
desert
pipeline
photovoltaics
time
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楚帅
葛维春
张诗钽
董辉
刘闯
许韦华
葛俊雄
王若为
朱佳宁
崔岱
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Northeast Electric Power University
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Northeast Dianli University
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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
    • 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
    • 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
    • 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
    • H02J3/381—Dispersed generators
    • 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
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
    • 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
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • 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
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers
    • 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
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
    • 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
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/20—Climate change mitigation technologies for sector-wide applications using renewable energy
    • 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
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/50—Energy storage in industry with an added climate change mitigation effect

Abstract

The invention discloses a method for producing hydrogen by electrolysis by using desert photovoltaics, and belongs to the technical field of hydrogen production by electrolysis. The method for producing hydrogen by electrolysis by using desert photovoltaics comprises the following steps: s1, building a hydrogen production factory in the photovoltaic field of the desert, and directly carrying out electrolytic hydrogen production by utilizing the photovoltaic field of the desert; calculating the power generation power of the photovoltaic cell matrix according to the solar irradiance in the desert, and calculating the hydrogen production flow; s2, constructing a hydrogen conveying pipeline in the desert, and determining the diameter of the hydrogen conveying pipeline according to the maximum production flow of hydrogen; and S3, conveying the hydrogen produced by the hydrogen production plant to a thermal power plant outside the desert through a hydrogen conveying pipeline, and generating power by using hydrogen energy. By adopting the method for producing hydrogen by electrolysis by using desert photovoltaics, the utilization rate of the desert photovoltaics is improved, the conveying cost is reduced, and the environmental pollution is reduced.

Description

Method for electrolytic hydrogen production by desert photovoltaic
Technical Field
The invention belongs to the technical field of electrolytic hydrogen production, and particularly relates to a method for electrolytic hydrogen production by desert photovoltaics.
Background
Energy is an important material basis on which human society relies to survive and develop. In recent years, with the increasing consumption of fossil energy and the high carbon emission, the greenhouse effect and global climate change are increasingly intensified. The desert photovoltaic has abundant solar energy resources, low land cost, no consumption of water resources in shortage in desert areas, improvement of ecological environment and huge development potential. Due to the characteristics of randomness, intermittence and irregularity of photovoltaic output, and the problems of high construction, operation and maintenance and high conveying cost of desert photovoltaics, the development of the desert photovoltaics is restricted.
The hydrogen is used as a clean energy source, has the characteristics of high energy density, large capacity, long service life, convenience in storage and transmission and the like, becomes one of the preferable schemes for large-scale development, storage and utilization of new energy, and the combination of photovoltaic power generation and hydrogen energy provides a feasible scheme for realizing carbon neutralization. By utilizing the desert photovoltaic power generation hydrogen production and energy storage, hydrogen can be used as clean and high-energy fuel to be merged into the existing fuel gas supply network, the complementary conversion from electric power to fuel gas is realized, electric energy or peak shaving service is provided for a power grid, the use of fossil fuel is effectively reduced, the utilization rate of new energy power generation is improved, and the problem of environmental pollution is relieved.
Disclosure of Invention
The invention aims to provide a method for producing hydrogen by electrolysis by using desert photovoltaics, which improves the utilization rate of the desert photovoltaics, reduces the conveying cost and reduces the environmental pollution.
In order to realize the aim, the invention provides a method for producing hydrogen by electrolysis by desert photovoltaics, which comprises the following steps:
s1, building a hydrogen production factory in the photovoltaic field of the desert, and directly carrying out electrolytic hydrogen production by utilizing the photovoltaic field of the desert; calculating the power generation power of the photovoltaic cell matrix according to the solar irradiance in the desert, and calculating the hydrogen production flow;
s2, constructing a hydrogen conveying pipeline in the desert, and determining the diameter of the hydrogen conveying pipeline according to the maximum production flow of hydrogen;
and S3, conveying the hydrogen produced by the hydrogen production plant to a thermal power plant outside the desert through a hydrogen conveying pipeline, and generating power by using hydrogen energy.
Preferably, in step S1, the generated power at the time t of the photovoltaic cell matrix is
Figure BDA0003374736590000021
The calculation formula of (2):
Figure BDA0003374736590000022
Figure BDA0003374736590000023
Figure BDA0003374736590000024
PPVthe generated power (kW) of the photovoltaic cell square matrix at the time t;
r is solar radiation energy (kW/m)2)；
APVIs the total light receiving area (m) of a photovoltaic cell matrix2)；
ηPVThe photoelectric conversion efficiency (%) of the photovoltaic cell square array is obtained;
Amthe light receiving area (m) of the mth solar cell module2)；
M is the number (piece) of solar array battery components;
ηmthe photoelectric conversion efficiency (%) of the mth solar cell module.
Preferably, in step S1, the hydrogen production flow rate at time t
Figure BDA0003374736590000025
Comprises the following steps:
Figure BDA0003374736590000026
Figure BDA0003374736590000027
hydrogen production flow rate (Nm) for time t3/h)；
ηH2Hydrogen production efficiency (%);
ρH2is the conversion coefficient (Nm) of electric power to hydrogen flow3/kW)。
Preferably, in step S1, the maximum hydrogen production flow rate in one day is calculated from the hydrogen production flow rate at time t:
Figure BDA0003374736590000031
VH2maxfor the maximum hydrogen production flow rate (Nm) of the day3/h)。
Preferably, in step S2, the diameter of the hydrogen pipeline is:
Figure BDA0003374736590000032
d is the diameter (m) of the hydrogen conveying pipeline;
TH2for the hydrogen transportation pipelineHydrogen temperature (K);
wH2the hydrogen flow rate (m/s) in the hydrogen transmission pipeline;
pH2the pressure (MPa) of hydrogen in the hydrogen pipeline.
Preferably, in step S2, the leakage of the hydrogen pipeline is tested, and the leakage rate of the hydrogen pipeline is:
Figure BDA0003374736590000033
a is the leakage rate (%) of the hydrogen pipeline;
T1initial temperature (. degree. C.) for pipeline testing;
T2the pipeline test end temperature (DEG C);
P1testing the initial absolute pressure (MPa) for the pipeline;
P2absolute pressure (MPa) at the end of pipeline testing.
Preferably, in step S2, the cost of the hydrogen pipeline is calculated as follows:
C＝CGC+CJS+CYW
c is the total cost (ten thousand yuan) of the hydrogen pipeline conveying system;
CGCcost for pipes (ten thousand yuan);
CJSfor construction costs (ten thousand yuan);
CYWthe expense of operation and maintenance is ten thousand yuan.
Preferably, in step S3, the hydrogen amount required by the gas turbine to generate power at time t is calculated according to the output of the gas turbine, where the output of the gas turbine at time t is:
Figure BDA0003374736590000041
Figure BDA0003374736590000042
the output (kW) of the gas turbine set at the moment t;
Figure BDA0003374736590000043
power (kW) demand for the load at time t;
Figure BDA0003374736590000044
generating power (kW) for a conventional power supply at the time t;
hydrogen quantity required by gas turbine set for power generation at t moment
Figure BDA0003374736590000045
Comprises the following steps:
Figure BDA0003374736590000046
Figure BDA0003374736590000047
the amount of hydrogen (Nm) consumed by the gas turbine set at time t3/h)；
Δ T is the time interval (h);
ηRQthe power generation efficiency (%) of the gas turbine set;
CLas the combustion heat value (kWh/m) of hydrogen gas3)。
Preferably, in step S3, when the hydrogen gas delivered by the hydrogen delivery pipe is excessive, the hydrogen gas is stored in the hydrogen storage tank, and when the delivered hydrogen gas is insufficient, the hydrogen gas is replenished by using the hydrogen gas in the gas storage tank, and the hydrogen storage amount of the hydrogen storage tank at time t is:
Figure BDA0003374736590000048
Figure BDA0003374736590000049
hydrogen gas storage amount (Nm) in the hydrogen storage tank at time t and time t-13/h)。
According to the method for producing hydrogen by electrolysis by using desert photovoltaics, a hydrogen production plant is built in a desert, and hydrogen is produced by photovoltaic power generation, so that the desert photovoltaic power generation can be consumed on site. The hydrogen is transported to the thermal power plant through the gas transmission pipeline, so that the use of fossil fuel can be reduced, the clean transformation of energy is facilitated, the environmental pollution is relieved, and the method has high practical application value.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic network structure diagram of the method for producing hydrogen by electrolysis using desert photovoltaics.
Detailed Description
The technical solution of the present invention is further illustrated by the accompanying drawings and examples.
Examples
A method for producing hydrogen by electrolysis by using desert photovoltaics comprises the following steps:
s1, building a hydrogen production factory in the photovoltaic field of the desert, and directly carrying out electrolytic hydrogen production by utilizing the photovoltaic field of the desert; and calculating the power generation power of the photovoltaic cell matrix according to the solar irradiance in the desert, and calculating the hydrogen production flow.
Generated power of photovoltaic cell square matrix at t moment
Figure BDA0003374736590000051
The calculation formula of (2):
Figure BDA0003374736590000052
Figure BDA0003374736590000053
Figure BDA0003374736590000054
PPVphotovoltaic cell matrix at time tGenerated power (kW);
r is solar radiation energy (kW/m)2)；
APVIs the total light receiving area (m) of a photovoltaic cell matrix2)；
ηPVThe photoelectric conversion efficiency (%) of the photovoltaic cell square array is obtained;
Amthe light receiving area (m) of the mth solar cell module2)；
M is the number (piece) of solar array battery components;
ηmthe photoelectric conversion efficiency (%) of the mth solar cell module.
Utilizing photovoltaic power generation in desert to produce hydrogen and calculating hydrogen production flow at t moment
Figure BDA0003374736590000055
Comprises the following steps:
Figure BDA0003374736590000056
Figure BDA0003374736590000057
hydrogen production flow rate (Nm) for time t3/h)；
ηH2Hydrogen production efficiency (%);
ρH2is the conversion coefficient (Nm) of electric power to hydrogen flow3/kW)。
Calculating the maximum hydrogen production flow in one day according to the hydrogen production flow at the time t:
Figure BDA0003374736590000061
VH2maxfor the maximum hydrogen production flow rate (Nm) of the day3/h)。
S2, constructing a hydrogen conveying pipeline in the desert, and determining the diameter of the hydrogen conveying pipeline according to the maximum production flow of hydrogen.
The diameter of the hydrogen conveying pipeline is as follows:
Figure BDA0003374736590000062
d is the diameter (m) of the hydrogen conveying pipeline;
TH2the temperature (K) of the hydrogen in the hydrogen conveying pipeline;
wH2the hydrogen flow rate (m/s) in the hydrogen transmission pipeline;
pH2the pressure (MPa) of hydrogen in the hydrogen pipeline.
In order to ensure the safety of hydrogen transportation, the leakage of the hydrogen transportation pipeline is tested, and the leakage rate of the hydrogen transportation pipeline is as follows:
Figure BDA0003374736590000063
a is the leakage rate (%) of the hydrogen pipeline;
T1initial temperature (. degree. C.) for pipeline testing;
T2the pipeline test end temperature (DEG C);
P1testing the initial absolute pressure (MPa) for the pipeline;
P2absolute pressure (MPa) at the end of pipeline testing.
And (3) calculating the cost of the hydrogen transmission pipeline by considering the pipe cost, the construction cost and the operation and maintenance cost:
C＝CGC+CJS+CYW
c is the total cost (ten thousand yuan) of the hydrogen pipeline conveying system;
CGCcost for pipes (ten thousand yuan);
CJSfor construction costs (ten thousand yuan);
CYWthe expense of operation and maintenance is ten thousand yuan.
And S3, conveying the hydrogen produced by the hydrogen production plant to a thermal power plant outside the desert through a hydrogen conveying pipeline, and generating power by using hydrogen energy.
Calculating the hydrogen amount required by the gas turbine set for power generation at the time t according to the output of the gas turbine set, wherein the output of the gas turbine set at the time t is as follows:
Figure BDA0003374736590000071
Figure BDA0003374736590000072
the output (kW) of the gas turbine set at the moment t;
Figure BDA0003374736590000073
power (kW) demand for the load at time t;
Figure BDA0003374736590000074
generating power (kW) for a conventional power supply at the time t;
hydrogen quantity required by gas turbine set for power generation at t moment
Figure BDA0003374736590000075
Comprises the following steps:
Figure BDA0003374736590000076
Figure BDA0003374736590000077
the amount of hydrogen (Nm) consumed by the gas turbine set at time t3/h)；
Δ T is the time interval (h);
ηRQthe power generation efficiency (%) of the gas turbine set;
CLas the combustion heat value (kWh/m) of hydrogen gas3)。
When the hydrogen quantity conveyed by the hydrogen conveying pipeline is larger than the hydrogen quantity required by the power generation of the gas turbine unit, the redundant hydrogen is stored in the hydrogen storage tank; when the hydrogen gas that the hydrogen transportation pipeline was carried is less than the required hydrogen tolerance of gas unit electricity generation, utilize the hydrogen in the gas holder to supply, the hydrogen memory space of hydrogen storage tank at time t is:
Figure BDA0003374736590000078
Figure BDA0003374736590000079
hydrogen gas storage amount (Nm) in the hydrogen storage tank at time t and time t-13/h)。
Therefore, the method for producing hydrogen by electrolysis by using desert photovoltaics improves the utilization rate of the desert photovoltaics, reduces the conveying cost and reduces the environmental pollution.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the invention without departing from the spirit and scope of the invention.

Claims (9)

1. The method for preparing hydrogen by electrolysis by using desert photovoltaics is characterized by comprising the following steps of:
s1, building a hydrogen production factory in the photovoltaic field of the desert, and directly carrying out electrolytic hydrogen production by utilizing the photovoltaic field of the desert; calculating the power generation power of the photovoltaic cell matrix according to the solar irradiance in the desert, and calculating the hydrogen production flow;
s2, constructing a hydrogen conveying pipeline in the desert, and determining the diameter of the hydrogen conveying pipeline according to the maximum production flow of hydrogen;
and S3, conveying the hydrogen produced by the hydrogen production plant to a thermal power plant outside the desert through a hydrogen conveying pipeline, and generating power by using hydrogen energy.
2. The method for producing hydrogen by electrolysis by desert photovoltaics as claimed in claim 1, wherein: in the step S1And the generated power of the photovoltaic cell at the moment t
Figure FDA0003374736580000011
The calculation formula of (2):
Figure FDA0003374736580000012
Figure FDA0003374736580000013
Figure FDA0003374736580000014
PPVthe generated power (kW) of the photovoltaic cell square matrix at the time t;
r is solar radiation energy (kW/m)2)；
APVIs the total light receiving area (m) of a photovoltaic cell matrix2)；
ηPVThe photoelectric conversion efficiency (%) of the photovoltaic cell square array is obtained;
Amthe light receiving area (m) of the mth solar cell module2)；
M is the number (piece) of solar array battery components;
ηmthe photoelectric conversion efficiency (%) of the mth solar cell module.
3. The method for producing hydrogen by electrolysis by desert photovoltaics as claimed in claim 2, wherein: in step S1, the hydrogen production flow rate at time t
Figure FDA0003374736580000015
Comprises the following steps:
Figure FDA0003374736580000016
Figure FDA0003374736580000021
hydrogen production flow rate (Nm) for time t3/h)；
ηH2Hydrogen production efficiency (%);
ρH2is the conversion coefficient (Nm) of electric power to hydrogen flow3/kW)。
4. The method for producing hydrogen by electrolysis by desert photovoltaics as claimed in claim 3, wherein: in step S1, the maximum hydrogen production flow rate in one day is calculated from the hydrogen production flow rate at time t:
Figure FDA0003374736580000022
VH2maxfor the maximum hydrogen production flow rate (Nm) of the day3/h)。
5. The method for producing hydrogen by electrolysis by desert photovoltaics as claimed in claim 4, wherein: in step S2, the diameter of the hydrogen pipeline is:
Figure FDA0003374736580000023
d is the diameter (m) of the hydrogen conveying pipeline;
TH2the temperature (K) of the hydrogen in the hydrogen conveying pipeline;
wH2the hydrogen flow rate (m/s) in the hydrogen transmission pipeline;
pH2the pressure (MPa) of hydrogen in the hydrogen pipeline.
6. The method for producing hydrogen by electrolysis by desert photovoltaics as claimed in claim 5, wherein: in step S2, the leakage of the hydrogen pipeline is tested, and the leakage rate of the hydrogen pipeline is:
Figure FDA0003374736580000024
a is the leakage rate (%) of the hydrogen pipeline;
T1initial temperature (. degree. C.) for pipeline testing;
T2the pipeline test end temperature (DEG C);
P1testing the initial absolute pressure (MPa) for the pipeline;
P2absolute pressure (MPa) at the end of pipeline testing.
7. The method for producing hydrogen by electrolysis by desert photovoltaics as claimed in claim 6, wherein: in step S2, the cost of the hydrogen transfer pipe is calculated:
C＝CGC+CJS+CYW
c is the total cost (ten thousand yuan) of the hydrogen pipeline conveying system;
CGCcost for pipes (ten thousand yuan);
CJSfor construction costs (ten thousand yuan);
CYWthe expense of operation and maintenance is ten thousand yuan.
8. The method for producing hydrogen by electrolysis by desert photovoltaics as claimed in claim 7, wherein: in step S3, the hydrogen amount required by the gas turbine to generate power at time t is calculated according to the output of the gas turbine, where the output of the gas turbine at time t is:
Figure FDA0003374736580000031
Figure FDA0003374736580000032
the output (kW) of the gas turbine set at the moment t;
Figure FDA0003374736580000033
power (kW) demand for the load at time t;
Figure FDA0003374736580000034
generating power (kW) for a conventional power supply at the time t;
hydrogen quantity required by gas turbine set for power generation at t moment
Figure FDA0003374736580000035
Comprises the following steps:
Figure FDA0003374736580000036
Figure FDA0003374736580000037
the amount of hydrogen (Nm) consumed by the gas turbine set at time t3/h)；
Δ T is the time interval (h);
ηRQthe power generation efficiency (%) of the gas turbine set;
CLas the combustion heat value (kWh/m) of hydrogen gas3)。
9. The method for producing hydrogen by electrolysis by desert photovoltaics as claimed in claim 8, wherein: in step S3, when the hydrogen gas delivered by the hydrogen delivery pipe is excessive, the hydrogen gas is stored in the hydrogen storage tank, when the delivered hydrogen gas is insufficient, the hydrogen gas is supplemented by the hydrogen gas in the gas storage tank, and the hydrogen storage amount of the hydrogen storage tank at time t is:
Figure FDA0003374736580000038
Figure FDA0003374736580000041
hydrogen gas storage amount (Nm) in the hydrogen storage tank at time t and time t-13/h)。
CN202111412541.1A 2021-11-25 2021-11-25 Method for electrolytic hydrogen production by desert photovoltaic Pending CN114123264A (en)

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