CN113512730A - Floating type solar photovoltaic photo-thermal coupling water electrolysis hydrogen production system and method - Google Patents
Floating type solar photovoltaic photo-thermal coupling water electrolysis hydrogen production system and method Download PDFInfo
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- CN113512730A CN113512730A CN202110374951.5A CN202110374951A CN113512730A CN 113512730 A CN113512730 A CN 113512730A CN 202110374951 A CN202110374951 A CN 202110374951A CN 113512730 A CN113512730 A CN 113512730A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 135
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 73
- 239000001257 hydrogen Substances 0.000 title claims abstract description 68
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 68
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 45
- 238000007667 floating Methods 0.000 title claims abstract description 43
- 230000008878 coupling Effects 0.000 title claims abstract description 22
- 238000010168 coupling process Methods 0.000 title claims abstract description 22
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title abstract description 5
- 239000007789 gas Substances 0.000 claims abstract description 81
- 239000012528 membrane Substances 0.000 claims description 27
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 20
- 239000001301 oxygen Substances 0.000 claims description 20
- 229910052760 oxygen Inorganic materials 0.000 claims description 20
- 239000011810 insulating material Substances 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 abstract description 5
- 239000008239 natural water Substances 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000010354 integration Effects 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000011358 absorbing material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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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
- C25B15/00—Operating or servicing cells
- C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
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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
- 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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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention discloses a floating solar photovoltaic photo-thermal coupling water electrolysis hydrogen production system and a method, wherein the system comprises a floating support, a photo-thermal module and a hydrogen production and gas collection module; the photo-thermal module comprises a light condensing device and a heat collecting device, the light condensing device is arranged on the floating support in a concave mode, and the heat collecting device is arranged in the light condensing device and used for collecting heat collected by the light condensing device; one end of the heat collecting device is provided with a water inlet; the hydrogen production and gas collection module comprises a photovoltaic cell array, an electrolysis device and a gas collection device; the photovoltaic cell array is arranged on the surface of the floating support; the other end of the heat collecting device is communicated with the electrolysis device; the photovoltaic cell array is electrically connected with the electrolysis device; the gas collecting device is arranged on the lower surface of the floating support and is connected with the gas outlet pipe of the electrolysis device. The invention can float on various water bodies, can electrolyze various natural water bodies, does not need additional water sources and complex electrolyte circulating pipelines, saves space and reduces the waste of solar energy resources.
Description
Technical Field
The invention belongs to the field of comprehensive utilization of solar energy and hydrogen energy, and relates to a floating type solar photovoltaic photo-thermal coupling water electrolysis hydrogen production system and method.
Background
The use of traditional energy sources such as fossil fuel in large quantities leads to serious energy supply crisis and environmental pollution problems, and the development of renewable clean energy sources is urgent. Solar energy is a new energy, which is renewable, widely distributed, ubiquitous and easily available, but is difficult to be directly utilized. Solar power generation, particularly solar photovoltaic power generation technology, has been practically applied to conversion of solar energy into electric energy, but the fluctuation is large, and the solar power generation technology is not favorable for being incorporated into a power grid. The hydrogen has the characteristics of high energy density, light weight, convenient storage and transportation, water as a combustion product, no environmental pollution and the like, and is an ideal energy carrier. The hydrogen production by electrolyzing water is a common hydrogen production technology. Therefore, the solar photovoltaic hydrogen production by water electrolysis is a promising implementation mode.
The water electrolysis hydrogen production technology mainly comprises alkaline water electrolysis, solid oxide electrolysis and Proton Exchange Membrane (PEM) electrolysis. The cost of the alkaline electrolytic cell is low, but alkali liquor pollution exists. The solid oxide electrolytic cell has the highest electrolytic efficiency, but the working temperature range is 700-1000 ℃, extra energy consumption is needed, and the solid oxide electrolytic cell is still in a laboratory research and development stage and is not commercially applied. PEM electrolyzers have electrolytic efficiencies in between, may use pure water, and are commercially available. When hydrogen is produced by PEM electrolysis, the electric energy dissipation can be reduced by increasing the electrolysis water temperature, so that the electrolysis efficiency is improved, but extra heating devices and energy consumption are required for increasing the electrolysis water temperature.
In addition, the existing solar photovoltaic electrolyzed water has the problems of large occupied area, high cost and obvious scale effect, so that the miniaturization, convenience and integration of equipment are hindered.
Disclosure of Invention
Based on the defects of the prior art described above, the invention aims to provide a floating type solar photovoltaic thermal coupling hydrogen production system and a floating type solar photovoltaic thermal coupling hydrogen production method. The system can float on water bodies such as oceans, lakes, reservoirs and the like, and solar energy resources on the water surface are utilized, so that precious land resources are prevented from being occupied; the natural water body can be electrolyzed, and an additional water source and a complex electrolyte circulating pipeline are not needed; the solar photothermal effect is utilized to increase the temperature of the electrolyzed water, thereby improving the electrolysis efficiency; with photovoltaic, electrolysis, light and heat, gas collection high integration, save space, realized the miniaturization and the modularization of equipment.
In order to achieve the purpose, the invention adopts the following technical scheme:
a floating solar photovoltaic photo-thermal coupling water electrolysis hydrogen production system comprises a floating support, a photo-thermal module and a hydrogen production and gas collection module;
the photo-thermal module comprises a light condensing device and a heat collecting device, the light condensing device is arranged on the floating support in a concave mode, and the heat collecting device is arranged in the light condensing device and used for collecting heat collected by the light condensing device; one end of the heat collecting device is provided with a water inlet;
the hydrogen production and gas collection module comprises a photovoltaic cell array, an electrolysis device and a gas collection device; the photovoltaic cell array is arranged on the surface of the floating support; the other end of the heat collecting device is communicated with the electrolysis device; the photovoltaic cell array is electrically connected with the electrolysis device to provide electric energy; the gas collecting device is connected with the gas outlet pipe of the electrolysis device;
the bottom of the gas collecting device is provided with small water outlet holes, and the top of the gas collecting device is provided with a gas outlet pipe with a piston.
As a further improvement of the invention, the light condensing device adopts a parabolic light condenser, the heat collecting device adopts a heat collecting circular tube, and the heat collecting circular tube is arranged at the focus of the parabolic light condenser.
As a further improvement of the invention, the parabolic condenser and the heat collecting circular tube meet the requirement that light incident on the parabolic condenser in the maximum light collection angle range is reflected to the heat collecting circular tube.
As a further improvement of the invention, the photovoltaic cell array comprises a plurality of solar cell panels, and the solar cell panels are symmetrically arranged on the floating supports at two sides of the light condensing device.
As a further improvement of the invention, the electrolysis device is a proton exchange membrane electrolytic cell which electrolyzes water into hydrogen and oxygen by using direct current generated by a photovoltaic cell array.
As a further improvement of the invention, the proton exchange membrane electrolytic cell is externally coated with a heat insulating material.
As a further improvement of the invention, a temperature sensor is arranged on the proton exchange membrane electrolytic cell.
As a further improvement of the invention, the gas collecting device comprises a hydrogen collecting chamber and an oxygen collecting chamber, the hydrogen collecting chamber is connected with the cathode of the electrolysis device, and the oxygen collecting chamber is connected with the anode of the electrolysis device;
the bottom of the hydrogen collecting chamber and the bottom of the oxygen collecting chamber are both provided with small water outlet holes, and the tops of the hydrogen collecting chamber and the oxygen collecting chamber are both provided with air outlet pipes with pistons.
As a further improvement of the invention, when water in the gas collecting device is discharged from the water outlet small hole, gas generated by the electrolysis device enters the gas collecting device.
A hydrogen production method of a floating type solar photovoltaic photo-thermal coupling water electrolysis hydrogen production system comprises the following steps:
when the floating solar photovoltaic water electrolysis hydrogen production system is placed on the water surface, water enters from the water inlet of the heat collection device and flows through the heat collection device, the electrolysis device and the gas collection device in sequence;
meanwhile, the heat collecting device absorbs the light reflected by the parabolic condenser and converts the light into heat energy, and the water absorbs heat and heats up when passing through the heat collecting device; the water temperature gradually rises from the water inlet to the electrolysis device to form natural convection to drive water to flow from the water inlet to the proton exchange membrane electrolytic cell;
the electrolysis device is powered by the photovoltaic cell array to electrolyze water to produce hydrogen and oxygen; the generated gas enters the gas collecting device for storage, and meanwhile, the original water of the gas collecting device is discharged through a water outlet at the bottom; when the gas is fully collected, the upper guide pipe piston of the gas collecting device is opened, the gas is transferred while water enters, and then the piston is closed to start the next round of gas collection.
Compared with the prior art, the invention has the following advantages:
the invention relates to a floating type electrolytic water hydrogen production system comprehensively utilizing solar photovoltaic and photo-thermal, which exploits and utilizes solar energy resources in various water surface occasions to avoid occupying valuable land area, can also be directly installed on ships or along the shore of islands as an energy supply system, and provides a potential energy supply scheme for places which are far away from the land and have difficult electricity utilization. On the basis of solar photovoltaic electrolyzed water, the invention adopts a parabolic condenser and a heat collecting circular tube coated with light absorbing materials, and utilizes solar energy to heat and improve the water temperature, thereby improving the electrolysis efficiency. The invention integrates photovoltaic, photo-thermal, electrolysis and gas collection, saves space, reduces waste of solar energy resources and is beneficial to modularization and integration of equipment.
Furthermore, the invention adopts the proton exchange membrane electrolytic cell, does not need to use alkaline electrolyte, can utilize various natural water bodies according to local conditions, and does not need to additionally provide various water sources and complex liquid circulation pipelines.
According to the hydrogen production method, because the water inlet, the heat collection device, the electrolysis device, the gas collection device, the water surface of the water body and other parts have height difference, natural convection generated by liquid temperature difference in the heat collection device comprehensively drives water to flow from the water body to the electrolysis device through the water inlet, an additional power pump is not needed, and the outflow loss of hot water is reduced.
Drawings
FIG. 1 is a front view of a floating solar photovoltaic photo-thermal coupling water electrolysis hydrogen production system of the present invention;
FIG. 2 is a top view of a hydrogen production system of the present invention;
FIG. 3 is a left side view of a hydrogen production system of the present invention;
fig. 4 is a schematic sectional view taken along line a-a in fig. 2.
The system comprises a floating support 1, a photovoltaic cell array 2, a parabolic condenser 3, a heat collection circular tube 4, a proton exchange membrane electrolytic cell 5, a hydrogen collection chamber 6, an oxygen collection chamber 7 and a temperature sensor 8.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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 is further illustrated below with reference to the accompanying figures 1-4.
The invention provides a floating solar photovoltaic photo-thermal coupling water electrolysis hydrogen production system, which comprises a floating support 1, a photo-thermal module and a hydrogen production and gas collection module; the floating support 1 is made of light foam materials, and the photo-thermal module and the hydrogen production and gas collection module are integrated by the floating support and can float on water; the photo-thermal module comprises a light condensing device and a heat collecting device, wherein the light condensing device adopts a parabolic light condenser 3, and the heat collecting device adopts a heat collecting circular tube 4; the heat collecting circular tube 4 is arranged at the focus of the parabolic condenser 3, the outer wall of the heat collecting circular tube 4 is coated with black light absorbing materials, light reflected by the parabolic condenser 3 is absorbed and converted into heat energy, the heat energy is transmitted to water in the heat collecting circular tube 4, the water flowing in from the water inlet is heated, the temperature of the electrolyzed water is increased; the hydrogen production and gas collection module comprises a photovoltaic cell array 2, an electrolysis device and a gas collection device.
The size structure of the parabolic condenser 3 and the heat collecting circular tube 4 meets the edge light principle, and light incident to the parabolic condenser 3 in the maximum lighting angle range is reflected to the heat collecting circular tube 4.
The photovoltaic cell array 2 is formed by symmetrically arranging 6 monocrystalline silicon solar panels on two sides of the parabolic condenser 3, is positioned on the upper surface of the suspension bracket 1, and is connected in series and parallel according to the illumination condition and the voltage and current requirements.
The proton exchange membrane electrolytic cell 5 comprises a cathode, an anode and a proton exchange membrane, the direct current generated by the photovoltaic cell array 2 is utilized to electrolyze water into hydrogen and oxygen, the cathode generates hydrogen, the anode generates oxygen, and the cathode and the anode are both connected to a gas collecting device through guide pipes; the proton exchange membrane electrolytic cell 5 is coated with a heat insulating material to avoid the heat dissipation effect caused by the flow of external water; the upper part of the proton exchange membrane electrolytic cell 5 is sealed by a rubber plug and is inserted into a temperature sensor 8 to monitor the temperature change in the proton exchange membrane electrolytic cell 5.
The gas collecting device comprises a hydrogen collecting chamber 6 and an oxygen collecting chamber 7, wherein the hydrogen collecting chamber 6 is connected with the cathode of the proton exchange membrane electrolytic cell 5 to collect hydrogen, and the oxygen collecting chamber 7 is connected with the anode side of the proton exchange membrane electrolytic cell 5 to collect oxygen; the bottom of the gas collecting device is provided with a small water outlet hole, and the top of the gas collecting device is provided with a guide pipe with a piston; when the system floats on water, the gas collecting device is filled with water, gas generated by water electrolysis of the proton exchange membrane electrolytic cell 5 enters the gas collecting device through the guide pipe, and water is discharged from a small water outlet hole at the bottom of the gas collecting device, namely collected by a drainage method; when the gas is fully collected, the piston of the upper guide pipe is opened, water flows into the gas collecting device, and the collected gas is transferred.
In summary, the working principle of the floating solar photovoltaic photo-thermal coupling water electrolysis hydrogen production system provided by the invention is as follows:
the system is placed on the water surface, and water enters the heat collecting circular tube 4 from the water inlet at the right side due to the fact that the water level is higher than the gas collecting device at the left side, and flows through the heat collecting circular tube 4, the proton exchange membrane electrolytic cell 5 and the gas collecting device in sequence. Meanwhile, the black light absorption material on the outer wall of the circular heat collection tube 4 converts the light reflected by the parabolic condenser 3 into heat energy, and when water flows through the circular heat collection tube 4, the water absorbs heat and is heated up due to the heat conduction effect along the tube wall because the temperature difference exists between the inner wall surface and the outer wall surface of the circular heat collection tube 4. The water temperature from the water inlet to the proton exchange membrane electrolytic cell 5 gradually rises, and the natural convection effect caused by the temperature difference along the axial direction of the heat collecting circular tube 4 can drive the water to flow from the water inlet to the proton exchange membrane electrolytic cell 5.
The electrolysis device is provided with electric energy by the photovoltaic cell array 2, and the electrolyzed water produces hydrogen and oxygen. The generated gas enters the gas collecting device for storage, and meanwhile, the original water of the gas collecting device is discharged through the bottom water outlet. When the gas is fully collected, the upper guide pipe piston of the gas collecting device is opened, the gas is transferred while water enters, and then the piston is closed to start the next round of gas collection.
The increase of the water temperature improves the electrolysis efficiency of the proton exchange membrane electrolytic cell 5, and the heat insulation material coated on the outer wall of the proton exchange membrane electrolytic cell 5 reduces the heat dissipation of the water inside the proton exchange membrane electrolytic cell, thereby being beneficial to maintaining the temperature of the electrolyzed water.
Based on the principle, the invention also provides a hydrogen production method of the floating type solar photovoltaic photo-thermal coupling water electrolysis hydrogen production system, which comprises the following steps:
when the floating solar photovoltaic water electrolysis hydrogen production system is placed on the water surface, water enters from the water inlet of the heat collection device and flows through the heat collection device, the electrolysis device and the gas collection device in sequence;
meanwhile, the heat collecting device absorbs the light reflected by the parabolic condenser 3 and converts the light into heat energy, and the water absorbs heat and heats up when passing through the heat collecting device; the water temperature gradually rises from the water inlet to the electrolysis device to form natural convection to drive water to flow from the water inlet to the proton exchange membrane electrolytic cell 5;
the electrolysis device is powered by the photovoltaic cell array 2 to electrolyze water to produce hydrogen and oxygen; the generated gas enters the gas collecting device for storage, and meanwhile, the original water of the gas collecting device is discharged through a water outlet at the bottom; when the gas is fully collected, the upper guide pipe piston of the gas collecting device is opened, the gas is transferred while water enters, and then the piston is closed to start the next round of gas collection.
Compared with the prior art, the solar water heater can float on various water bodies, utilizes solar energy resources on water surface occasions, and avoids occupying precious land resources; the alkaline electrolyte is not needed, various natural water bodies can be electrolyzed, and an additional water source and a complex electrolyte circulating pipeline are not needed; the solar photothermal effect is utilized to increase the temperature of the electrolyzed water, thereby improving the electrolysis efficiency; the photovoltaic, electrolysis, photo-thermal and gas collection are highly integrated, so that the space is saved, and the waste of solar energy resources is reduced.
The foregoing is a more detailed description of the invention and it is not intended that the invention be limited to the specific embodiments described herein, but that various modifications, alterations, and substitutions may be made by those skilled in the art without departing from the spirit of the invention, which should be construed to fall within the scope of the invention as defined by the appended claims.
Claims (10)
1. A floating solar photovoltaic photo-thermal coupling water electrolysis hydrogen production system is characterized by comprising a floating support (1), a photo-thermal module and a hydrogen production and gas collection module;
the photo-thermal module comprises a light condensing device and a heat collecting device, the light condensing device is arranged on the floating support (1) in a concave mode, and the heat collecting device is arranged in the light condensing device and used for collecting heat collected by the light condensing device; one end of the heat collecting device is provided with a water inlet;
the hydrogen production and gas collection module comprises a photovoltaic cell array (2), an electrolysis device and a gas collection device; the photovoltaic cell array (2) is arranged on the surface of the floating support (1); the other end of the heat collecting device is communicated with the electrolysis device; the photovoltaic cell array (2) is electrically connected with the electrolysis device to provide electric energy; the gas collecting device is arranged on the lower surface of the floating support (1) and is connected with the gas outlet pipe of the electrolysis device; the bottom of the gas collecting device is provided with small water outlet holes, and the top of the gas collecting device is provided with a gas outlet pipe with a piston.
2. The floating solar photovoltaic optothermal coupling water electrolysis hydrogen production system according to claim 1, wherein the light gathering device is a parabolic condenser (3), the heat collecting device is a heat collecting circular tube (4), and the heat collecting circular tube (4) is arranged at the focus of the parabolic condenser (3).
3. The floating solar photovoltaic optothermal coupling water electrolysis hydrogen production system according to claim 2, wherein the parabolic condenser (3) and the heat collecting circular tube (4) meet the requirement that light incident on the parabolic condenser (3) within the maximum lighting angle range is reflected to the heat collecting circular tube (4).
4. The floating solar photovoltaic optothermal coupling water electrolysis hydrogen production system according to claim 1, wherein the photovoltaic cell array (2) comprises a plurality of solar cell panels symmetrically arranged on the floating supports (1) at two sides of the light gathering device.
5. The floating solar photovoltaic photo-thermal coupling water electrolysis hydrogen production system according to claim 1, wherein the electrolysis device is a proton exchange membrane electrolytic cell (5), and the proton exchange membrane electrolytic cell (5) electrolyzes water into hydrogen and oxygen by using direct current generated by the photovoltaic cell array (2).
6. The floating solar photovoltaic optothermal coupling water electrolysis hydrogen production system according to claim 5, wherein the proton exchange membrane electrolytic cell (5) is coated with a heat insulating material.
7. The floating solar photovoltaic optothermal coupling water electrolysis hydrogen production system according to claim 5, wherein a temperature sensor (8) is arranged on the proton exchange membrane electrolytic cell (5).
8. The floating solar photovoltaic optothermal coupling water electrolysis hydrogen production system according to claim 1, wherein the gas collecting device comprises a hydrogen collecting chamber (6) and an oxygen collecting chamber (7), the hydrogen collecting chamber (6) is connected with the cathode of the electrolysis device, and the oxygen collecting chamber (7) is connected with the anode side of the electrolysis device;
the bottom of the hydrogen collecting chamber (6) and the bottom of the oxygen collecting chamber (7) are both provided with small water outlet holes, and the top of the hydrogen collecting chamber and the oxygen collecting chamber are both provided with air outlet pipes with pistons.
9. The floating solar photovoltaic optothermal coupling water electrolysis hydrogen production system according to claim 1, wherein when water in the gas collecting device is discharged from the water outlet small hole, gas generated by the electrolysis device enters the gas collecting device.
10. The hydrogen production method of the floating type solar photovoltaic optothermal coupling water electrolysis hydrogen production system according to any one of claims 1 to 8, characterized by comprising the following steps:
when the floating solar photovoltaic water electrolysis hydrogen production system is placed on the water surface, water enters from the water inlet of the heat collection device and flows through the heat collection device, the electrolysis device and the gas collection device in sequence;
meanwhile, the heat collecting device absorbs the light reflected by the parabolic condenser (3) and converts the light into heat energy, and the water absorbs heat and heats up when passing through the heat collecting device; the water temperature gradually rises from the water inlet to the electrolysis device to form natural convection to drive water to flow from the water inlet to the proton exchange membrane electrolytic cell (5);
the electrolysis device is powered by the photovoltaic cell array (2) to electrolyze water to produce hydrogen and oxygen; the generated gas enters the gas collecting device for storage, and meanwhile, the original water of the gas collecting device is discharged through a water outlet at the bottom; when the gas is fully collected, the upper guide pipe piston of the gas collecting device is opened, the gas is transferred while water enters, and then the piston is closed to start the next round of gas collection.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114164443A (en) * | 2021-12-03 | 2022-03-11 | 鄂尔多斯市紫荆创新研究院 | Method for preparing hydrogen by coupling photovoltaic power generation and electrolyzed water |
| CN114481181A (en) * | 2022-01-10 | 2022-05-13 | 江苏大学 | Micro solid oxide electrolytic hydrogen production device based on micro combustion heat supply and power supply |
| CN114836775A (en) * | 2022-03-16 | 2022-08-02 | 上海电力大学 | Integrated portable photovoltaic water electrolysis hydrogen production device and hydrogen production system |
| CN115676775A (en) * | 2022-11-21 | 2023-02-03 | 西安航天动力研究所 | Photolysis water hydrogen production device and lunar base energy supply system |
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| CN114481181B (en) * | 2022-01-10 | 2024-05-14 | 江苏大学 | Micro solid oxide electrolytic hydrogen production device based on micro combustion heat supply and power supply |
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| CN115676775A (en) * | 2022-11-21 | 2023-02-03 | 西安航天动力研究所 | Photolysis water hydrogen production device and lunar base energy supply system |
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