CN114059079B - Thermal self-sustaining concentrating photovoltaic electrolytic hydrogen production reaction system based on severe conditions - Google Patents
Thermal self-sustaining concentrating photovoltaic electrolytic hydrogen production reaction system based on severe conditions Download PDFInfo
- Publication number
- CN114059079B CN114059079B CN202111387525.1A CN202111387525A CN114059079B CN 114059079 B CN114059079 B CN 114059079B CN 202111387525 A CN202111387525 A CN 202111387525A CN 114059079 B CN114059079 B CN 114059079B
- Authority
- CN
- China
- Prior art keywords
- heat
- heat exchange
- concentrating photovoltaic
- photovoltaic
- electrolytic cell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 34
- 239000001257 hydrogen Substances 0.000 title claims abstract description 34
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000010521 absorption reaction Methods 0.000 claims abstract description 13
- 238000004321 preservation Methods 0.000 claims abstract description 12
- 238000012546 transfer Methods 0.000 claims abstract description 12
- 238000003860 storage Methods 0.000 claims description 25
- 239000012530 fluid Substances 0.000 claims description 22
- 238000005338 heat storage Methods 0.000 claims description 12
- 230000005855 radiation Effects 0.000 claims description 11
- 238000005868 electrolysis reaction Methods 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 7
- 230000002572 peristaltic effect Effects 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 3
- 239000005751 Copper oxide Substances 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910000431 copper oxide Inorganic materials 0.000 claims description 3
- 230000005284 excitation Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 229910021421 monocrystalline silicon Inorganic materials 0.000 claims description 3
- 239000002105 nanoparticle Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 239000002210 silicon-based material Substances 0.000 claims description 3
- 238000013021 overheating Methods 0.000 abstract description 3
- 230000010354 integration Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 5
- 230000004907 flux Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/60—Constructional parts of cells
- C25B9/65—Means for supplying current; Electrode connections; Electric inter-cell connections
-
- 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
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/60—Constructional parts of cells
- C25B9/67—Heating or cooling means
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/20—Optical components
- H02S40/22—Light-reflecting or light-concentrating means
-
- 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
- Y02E10/52—PV systems with concentrators
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Power Engineering (AREA)
- Inorganic Chemistry (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention discloses a thermal self-sustaining concentrating photovoltaic electrolytic hydrogen production reaction system based on severe conditions, which comprises components such as a concentrating Fresnel lens, a concentrating photovoltaic, a heat exchanger, a circulating pump, a circuit switching element and the like, and aims to provide mild reaction conditions for producing hydrogen by electrolyzing water in severe winter conditions in areas such as Xinjiang or Tibet and the like and ensure the efficiency of the reaction conditions. Meanwhile, an electric/thermal/hydrogen combined power supply mode can be formed. The device is mainly divided into parts such as electrolyzed water, heat exchange heat transfer, a heat absorption part at a heat exchange cold end and the like, so that the problems of efficiency dip and the like caused by local overheating of the concentrating photovoltaic surface can be reduced, heat carried by a nano heat exchange working medium can be used for providing heat preservation measures for an electrolytic cell, and self-sustaining supply of system heat without external heat energy input is realized. The device has the characteristics of good integration level, high intelligent degree, simple operation and the like.
Description
Technical Field
The invention belongs to the field of new energy preparation, and particularly relates to a thermal self-sustaining concentrating photovoltaic electrolytic hydrogen production reaction system based on severe conditions.
Background
Primary energy sources such as solar energy, wind energy, tidal energy, geothermal energy, water energy and the like are orderly converted into secondary energy sources such as hydrogen energy, electric energy and the like, and the primary energy sources are stored and utilized in the core trend and direction of the current national energy source field. The method breaks through the important strategic problems of green hydrogen energy preparation, storage, utilization and the like, and plays a vital role in energy revolution in China. Regarding large-scale hydrogen production, the relatively wide technology reported in the prior art comprises coal chemical hydrogen production, electrolytic water hydrogen production, biomass hydrogen production, microbial hydrogen production, photocatalytic hydrogen production and the like, wherein the electrolytic water hydrogen production has higher energy conversion efficiency and can realize the effective separation of oxyhydrogen products compared with other types, and is more close to the standard of industrial application. However, the direct electrolysis of water to produce hydrogen using industrial large-scale electrolytic tanks is required to provide high power consumption and is economically poor. And the electrolytic reaction device is heavy, so that the later maintenance, the replacement of the reaction membrane, the electrode material and the like are complicated.
The solar energy source radiation distribution characteristics of China are combined, the photovoltaic modules are arranged in large areas in the western regions of China, particularly in areas such as Xinjiang, tibet and Lanzhou, so that the enriched solar energy can be utilized and converted, but the mode of mainly generating energy by wind energy and water energy in the western regions is the energy source mode, so that the large-scale utilization of the solar energy does not occupy a very high proportion, and the related devices for preparing hydrogen energy by the solar energy are more recently reported. Therefore, it is of great importance to design and build an in-situ hydrogen production reaction system maintained by solar energy. In addition, the objective properties of obvious temperature difference between the western part and the day and night, uneven illumination radiation and the like in China greatly restrict the space and the value of photovoltaic utilization, so that the search for a simple and low-cost light converging technology to greatly improve the conversion efficiency of solar photons to photovoltaic power generation is an important link for overcoming weather reasons and improving the energy utilization efficiency. Related scientific researches show that the hydrogen production efficiency of the electrolytic water can be reduced by 0.25-5 percent per DEG C under the experimental atmosphere of overheating or supercooling, so that the method has important and practical industrial application value for controlling the environmental temperature of the electrolytic cell in the hydrogen production process of the electrolytic water.
Disclosure of Invention
The invention aims to provide a thermal self-sustaining concentrating photovoltaic electrolytic hydrogen production reaction system based on severe conditions, and the device can be used for realizing the co-generation of concentrating photovoltaic electrolytic hydrogen production and photovoltaic power generation and heat utilization under the extremely cold conditions of Xinjiang or Tibet and the like.
In order to achieve the above purpose, the invention is realized by adopting the following scheme:
a thermal self-sustaining concentrating photovoltaic electrolytic hydrogen production reaction system based on severe conditions comprises an electrolytic water part, a heat exchange heat transfer part and a heat exchange cold end heat absorption part, wherein the electrolytic water part comprises concentrating photovoltaic, an electric storage device and an electrolytic cell; the heat exchange heat transfer part comprises a heat exchange flow passage plate, a nano fluid storage tank and a heat exchanger; the heat absorption part of the heat exchange cold end comprises a heat exchanger and an electrolytic cell heat preservation layer;
the water electrolysis part is used for focusing outdoor direct solar energy to high energy flux density through a light-focusing Fresnel lens and radiating the focused solar energy to the surface of a light-focusing photovoltaic, and then storing the generated electric energy into an electric storage device or directly supplying the electric energy to a subsequent electrolytic cell to electrolyze water so as to prepare hydrogen; the heat exchange heat transfer part utilizes the high-thermal conductivity nanofluid heat exchange working medium stored in the nanofluid storage tank to flow through the heat exchange flow channel plate, and then conveys the redundant heat on the back of the concentrating photovoltaic to the shell side of the heat exchanger; after the heat exchange cold end heat absorption part utilizes the tube side and the shell side of the heat exchanger to perform full heat exchange, heat is stored in a heat storage working medium with high specific heat capacity and is conveyed to the heat preservation layer of the electrolytic cell, so that the normal operation of the electrolytic cell under the cold condition is ensured.
The invention is further improved in that the working platform of the concentrating photovoltaic comprises a bottom bracket, a three-dimensional mirror bracket and a rotatable supporting shaft; the condensing Fresnel lens and the bottom support are respectively provided with three auxiliary support rods standing sideways and converging to the bearing rings at the top, the rotatable support shafts are placed inside the two bearing rings, the symmetry of the left end and the right end is guaranteed, the condensing Fresnel lens is arranged on the three-dimensional mirror frame, and the three-dimensional mirror frame can rotate around the rotatable support shafts to track the solar radiation direction.
The invention is further improved in that the concentrating photovoltaic and the heat exchange flow channel plate are stacked up and down and are placed in a center overlapping manner, and the concentrating photovoltaic and the heat exchange flow channel plate are in close contact; the heat exchange flow channel plate is internally designed by adopting a serpentine bend, so that the heat exchange area of the concentrated photovoltaic is increased, the local overheat of the photovoltaic during working is reduced, and the photovoltaic to electric conversion efficiency is improved; the concentrating photovoltaic and heat exchange flow channel plate is arranged in the middle of the rotatable supporting shaft, and sunlight is converged by the concentrating Fresnel lens and then reaches the excitation light voltage on the surface of the concentrating photovoltaic.
The invention is further improved in that the heat exchange heat transfer part also comprises a flowmeter, a temperature detection element and a circulating pump, the nano fluid storage tank is internally stored with nano fluid for heat exchange at the back of the concentrating photovoltaic, the base liquid of the nano fluid is water, alcohol or oil, and the nano particles are copper, copper oxide or aluminum oxide; the nano fluid in the pipeline is driven to be pumped through the circulating pump, the temperature detection element is used for monitoring the temperature of the nano fluid in real time, and the accurate control of the temperature is accurately adjusted by adjusting the power of the circulating pump or the flow of the flowmeter.
The invention is further improved in that the heat absorption part of the heat exchange cold end also comprises a peristaltic pump and a flow controller, a salt-containing fluid is filled in a heat absorption pipeline for carrying out heat preservation measures on the electrolytic cell, and the working temperature of the electrolytic cell is regulated by regulating the pumping power of the peristaltic pump or the flow controller; the heat storage fluid is contained in the heat insulation layer of the electrolytic cell and is wrapped on the outer layer of the electrolytic cell so as to ensure the full heat insulation of the electrolytic cell.
The invention is further improved in that the water electrolysis part further comprises a circuit switching element, the electric energy generated by the concentrating photovoltaic is operated according to real-time weather conditions, and the circuit switching element is switched to regulate and control the energy supply mode of the electrolytic cell.
The invention further improves that the heat conducted from the concentrating photovoltaic through the heat exchange flow channel plate is distributed, so that the heat carried by the high-thermal-conductivity nanofluid stored in the nanofluid storage tank is used for other heat storage equipment on the premise of ensuring that the heat exchange is fully carried out at the heat exchanger.
The invention is further improved in that the concentrating photovoltaic material is monocrystalline silicon or polycrystalline silicon material.
Compared with the prior art, the invention has at least the following beneficial technical effects:
1. the device frame is assembled by adopting aluminum alloy thickened strength steel plates, and is suitable for wind and sand resistance and corrosion resistance under severe conditions. Meanwhile, the device provided by the invention adopts the concentrating Fresnel lens, so that the light radiation intensity of the unit photovoltaic surface can be increased, the solar energy utilization efficiency is greatly improved, the photovoltaic utilization cost is reduced, and the defects of low solar radiation energy flux density, discontinuity and the like are overcome.
2. The device fully solves the problem of local overheating of the concentrating photovoltaic under high-intensity radiation, improves the conversion efficiency of photo-generated electricity on one hand, uses the high thermal conductivity characteristic of the nanofluid to heat the electrolytic cell device under severe cold conditions, and ensures the normal operation and continuous output of hydrogen energy. In addition, the surplus waste heat can be stored in other heat storage devices, so that the combined supply of PV/T/H (H stands for hydrogen) is realized.
3. The electric energy prepared by concentrating photovoltaic can be actively regulated and controlled according to actual conditions, and is directly supplied to an electrolytic cell for electrolysis to generate hydrogen when the electric energy is low; if more electric energy is generated, the electric energy can be stored in the electric storage device, so that all-weather reaction in the water electrolysis process is realized. The energy conversion efficiency of the energy output is significantly increased.
4. Under the operating condition of the device, the specific heat exchange quantity of the heat exchange flow channel plate and the concentrating photovoltaic can be effectively adjusted according to the optimal operating condition of the photovoltaic and the flow of the circulating pump.
5. The device can solve the problem of the reduction of the working efficiency of the electrolytic cell under extremely cold conditions, and realizes the self-maintenance of heat energy and the optimization of overall performance of the whole system under the condition of no external heat supply.
In summary, the device of the invention fully replaces the waste heat of the photovoltaic panel body under the concentrating working condition and is used for carrying out heat preservation design on the periphery of the electrolytic cell by arranging the high-thermal-conductivity nanofluid heat exchange channel at the back of the concentrating photovoltaic panel, thereby forming a working mode of PV/T/H (H stands for hydrogen) co-production and greatly improving the energy utilization efficiency. According to the method, on one hand, the temperature of the photovoltaic during working is reasonably controlled, and on the other hand, the utilization rate of heat conversion generated in solar radiation is increased, so that the working environment of the electrolytic cell is optimized. In particular, the system can realize self-sustained utilization of heat of the system and provide effective guarantee for normal operation of the water electrolysis hydrogen production device without adding any external heat input under extremely cold and severe conditions in western regions.
Drawings
Fig. 1 is a schematic general structure of the present invention.
Reference numerals illustrate:
1 is a bottom bracket, 2 is a three-dimensional mirror bracket, 3 is a light-gathering Fresnel lens, 4 is a rotatable supporting shaft, 5 is light-gathering photovoltaic, 6 is a heat exchange flow channel plate, 7 is a flowmeter, 8 is a temperature detection element, 9 is a nano fluid storage tank, 10 is a circulating pump, 11 is an electrolytic cell, 12 is an electrolytic cell heat preservation layer, 13 is a flow controller, 14 is a peristaltic pump, 15 is a heat exchanger, 16 is an electric storage device, and 17 is a circuit switching element.
Detailed Description
The invention is described in further detail below by way of specific examples in conjunction with the accompanying drawings.
As shown in fig. 1, the whole reaction system mainly comprises three parts, wherein the three parts are an electrolyzed water part formed by connecting a concentrating photovoltaic 5, an electric storage device 16, a circuit switching element 17 and an electrolytic cell 11; the heat exchange flow channel plate 6, the flowmeter 7, the temperature detection element 8, the nano fluid storage tank 9, the circulating pump 10 and the heat exchanger 15 form a heat exchange heat transfer part in a shell side manner; the heat-exchanging cold end heat-absorbing part is formed by a heat exchanger 15 tube side, a peristaltic pump 14, a flow controller 13, an electrolytic cell heat-insulating layer 12 and the like.
Specifically, the main function of the water electrolysis part is to focus outdoor direct solar energy to high energy flux density through the light-gathering Fresnel lens 3 and radiate the focused solar energy to the surface of the light-gathering photovoltaic 5, and then store the generated electric energy to the electric storage device 16 or directly supply the electric energy to the subsequent electrolytic cell 11 to electrolyze water to prepare hydrogen; the heat exchange and heat transfer part mainly utilizes the high-heat-conductivity nanofluid heat exchange working medium stored in the nanofluid storage tank 9 to flow through the heat exchange flow channel plate 6, and then transfers the redundant heat at the back of the photovoltaic plate to the shell side of the heat exchanger 15; the heat absorption part of the heat exchange cold end mainly stores heat in a heat storage medium with high specific heat capacity after the tube side and the shell side of the heat exchanger 15 are used for carrying out full heat exchange, and the heat is conveyed to the heat preservation layer 12 of the electrolytic cell, so that the normal operation of the electrolytic cell under the cold condition is ensured.
Preferably, the working platform of the concentrating photovoltaic 5 mainly comprises a bottom bracket 1, a stereoscopic mirror bracket 2, a concentrating Fresnel lens 3, a rotatable supporting shaft 4 and the like. The left side and the right side of the bottom bracket 1 are respectively provided with three auxiliary supporting rods which are on the side and are converged to the bearing ring at the top. The rotatable support shaft 4 is placed inside the two bearing rings and ensures symmetry of the left and right ends. The stereoscopic eyeglass frame 2 is capable of rotating north and south about a rotatable support shaft 4 to track the solar radiation orientation.
Preferably, the concentrating photovoltaic 5 and the heat exchange runner plate 6 are stacked up and down and are placed in a center overlapping mode, and the concentrating photovoltaic 5 and the heat exchange runner plate are in close contact. The heat exchange flow channel plate 6 is designed in a serpentine bend, so that the heat exchange area of the concentrating photovoltaic 5 is fully increased, the local overheat of the photovoltaic working process is reduced, and the photovoltaic light-to-electricity conversion efficiency is improved. The concentrating photovoltaic 5 and the heat exchange flow channel plate 6 are arranged in the middle of the rotatable supporting shaft 4, and sunlight is converged by the concentrating Fresnel lens 3 to generate voltage on the surface excitation light of the concentrating photovoltaic 5. The material of the concentrating photovoltaic 5 may be monocrystalline silicon or polycrystalline silicon material.
Preferably, the nanofluid for heat exchange at the back of the concentrated photovoltaic 5 is stored in the nanofluid storage tank 9, the base liquid of the nanofluid can be water, alcohol, oil, etc., and the nanoparticles are cheap metal or oxide particles such as copper, copper oxide, aluminum oxide, etc. The nano-fluid in the pipeline is pumped by the driving of the circulating pump 10, the temperature detection element 8 can be used for monitoring the temperature of the nano-fluid in real time, and the accurate control of the temperature can be accurately regulated by regulating the power of the circulating pump 10 or the flow of the flowmeter 7. The circulating pipeline is made of polytetrafluoroethylene materials, and the outer side of the circulating pipeline is coated with heat insulation materials, so that heat loss in the circulating heat exchange process is reduced.
Preferably, the heat absorption pipeline for carrying out heat preservation measures on the electrolytic cell is provided with a heat storage fluid which is resistant to freezing and has relatively high specific heat capacity, such as a salt-containing fluid and the like. The operating temperature of the electrolytic cell can be adjusted by adjusting the pumping power of the peristaltic pump 14 or the flow controller 13. The heat storage fluid is mainly contained in the heat insulation layer 12 of the electrolytic cell and wrapped on the outer layer of the electrolytic cell 11 so as to ensure the sufficient heat insulation of the electrolytic cell 11.
Preferably, the electric energy generated by the concentrated photovoltaic 5 can be stored in the electric storage device 16 or directly drive the electrolytic cell 11 to operate. The specific actual circuit adjustment can be operated according to real-time weather conditions, and the circuit switching element 17 is switched in time to regulate and control the energy supply mode of the electrolytic cell 11. When the solar radiation condition is good, part of the electric energy can be stored in the electric storage device 16 so as to realize the all-weather electrolytic hydrogen production process and improve the overall efficiency of the energy from the input end to the output end.
The operation of the device is described separately below:
firstly, the whole device is opposite to the optimal solar radiation direction, and the concentrating photovoltaic 5 generates electric energy under the irradiation of concentrated light and is directly connected to the electrolytic cell 11 to electrolyze water or store redundant electric energy through the electric storage device 16 for use at night; the high thermal conductivity nano fluid flowing through the heat exchange flow channel plate 16 carries out a full heat exchange process at the back of the concentrating photovoltaic 5, and the heat exchange amount can be adjusted by adjusting the power of the flowmeter 7 and the circulating pump 10; the nano fluid after the full heat exchange of the shell side is sent to the heat preservation layer 12 of the electrolytic cell after the full heat exchange of the heat exchanger 15 and the heat storage fluid of the tube side, so as to provide a mild working condition for the electrolytic cell to obtain a constant reaction condition and stabilize the real-time efficiency in the electrolytic process. Meanwhile, for the redundant heat exchange quantity, heat can be output to other heat storage equipment at the position of the nanofluid storage tank 9, so that a PV/T/H combined supply mode is formed.
While the invention has been described in detail in the foregoing general description and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (2)
1. The thermal self-sustaining concentrating photovoltaic electrolytic hydrogen production reaction system based on severe conditions is characterized by comprising an electrolytic water part, a heat exchange heat transfer part and a heat exchange cold end heat absorption part, wherein the electrolytic water part comprises a concentrating photovoltaic (5), an electric storage device (16) and an electrolytic cell (11); the heat exchange heat transfer part comprises a heat exchange flow channel plate (6), a nanofluid storage tank (9) and a heat exchanger (15); the heat absorption part of the heat exchange cold end comprises a heat exchanger (15) and an electrolytic cell heat preservation layer (12);
the water electrolysis part is used for focusing outdoor direct solar energy to high energy flow density through a light-gathering Fresnel lens (3) and radiating the focused solar energy to the surface of a light-gathering photovoltaic (5), and then storing the generated electric energy into an electric storage device (16) or directly supplying the electric energy to a subsequent electrolytic cell (11) to electrolyze water so as to prepare hydrogen; the heat exchange and heat transfer part utilizes high-heat-conductivity nanofluid heat exchange working medium stored in a nanofluid storage tank (9) to flow through a heat exchange flow channel plate (6), and then redundant heat at the back of the concentrating photovoltaic (5) is transported to a shell side of a heat exchanger (15); after the heat exchange cold end heat absorption part utilizes the tube side and the shell side of the heat exchanger (15) to perform full heat exchange, heat is stored in a heat storage working medium with high specific heat capacity and is conveyed to the electrolytic cell heat preservation layer (12), so that the normal operation of the electrolytic cell under the cold condition is ensured;
the working platform of the concentrating photovoltaic (5) comprises a bottom bracket (1), a three-dimensional mirror bracket (2) and a rotatable supporting shaft (4); the condensing Fresnel lens (3) and the bottom bracket (1) are respectively provided with three auxiliary supporting rods which are erected on the left side and the right side and are converged to bearing rings at the top, the rotatable supporting shafts (4) are placed inside the two bearing rings, the symmetry of the left end and the right end is ensured, the condensing Fresnel lens (3) is arranged on the three-dimensional mirror bracket (2), and the three-dimensional mirror bracket (2) can rotate around the rotatable supporting shafts (4) to track the solar radiation direction;
the heat exchange and heat transfer part also comprises a flowmeter (7), a temperature detection element (8) and a circulating pump (10), wherein a nanofluid for heat exchange at the back of the concentrating photovoltaic (5) is stored in a nanofluid storage tank (9), the base solution of the nanofluid is water, alcohol or oil, and the nanoparticles are copper, copper oxide or aluminum oxide; the nano fluid in the pipeline is driven and pumped through the circulating pump (10), the temperature detection element (8) is used for monitoring the temperature of the nano fluid in real time, and the accurate control of the temperature is accurately regulated by regulating the power of the circulating pump (10) or the flow of the flowmeter (7); the heat absorption part of the heat exchange cold end also comprises a peristaltic pump (14) and a flow controller (13), and is used for carrying out heat preservation measures on the electrolytic cell (11), wherein salt-containing fluid is filled in a heat absorption pipeline, and the working temperature of the electrolytic cell (11) is regulated by regulating the pumping work of the peristaltic pump (14) or the flow controller (13); the heat storage fluid is contained in the heat insulation layer (12) of the electrolytic cell and is wrapped on the outer layer of the electrolytic cell (11) so as to ensure the sufficient heat insulation of the electrolytic cell (11);
the water electrolysis part also comprises a circuit switching element (17), the electric energy generated by the concentrating photovoltaic (5) is operated according to the real-time weather condition, and the circuit switching element (17) is switched to regulate and control the energy supply mode of the electrolytic cell (11);
the concentrating photovoltaic (5) and the heat exchange runner plate (6) are stacked up and down and are placed in a center overlapping mode, and the concentrating photovoltaic and the heat exchange runner plate are in close contact; the heat exchange flow channel plate (6) is internally designed by adopting a serpentine bend, and is used for increasing the heat exchange area with the concentrating photovoltaic (5), so that the local overheat of the photovoltaic in working is reduced, and the photovoltaic to electric conversion efficiency is improved; the concentrating photovoltaic (5) and the heat exchange flow channel plate (6) are arranged in the middle of the rotatable supporting shaft (4), and sunlight is converged by the concentrating Fresnel lens (3) to reach excitation light generation voltage on the surface of the concentrating photovoltaic (5);
the heat conducted from the concentrating photovoltaic (5) is distributed through the heat exchange flow channel plate (6), so that the heat carried by the high-thermal-conductivity nanofluid stored in the nanofluid storage tank (9) is used for other heat storage equipment on the premise that the heat exchange is fully carried out at the heat exchanger (15).
2. A thermally self-sustaining concentrated photovoltaic electrolytic hydrogen production reaction system based on severe conditions according to claim 1, wherein the material of the concentrated photovoltaic (5) is monocrystalline silicon or polycrystalline silicon material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111387525.1A CN114059079B (en) | 2021-11-22 | 2021-11-22 | Thermal self-sustaining concentrating photovoltaic electrolytic hydrogen production reaction system based on severe conditions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111387525.1A CN114059079B (en) | 2021-11-22 | 2021-11-22 | Thermal self-sustaining concentrating photovoltaic electrolytic hydrogen production reaction system based on severe conditions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114059079A CN114059079A (en) | 2022-02-18 |
| CN114059079B true CN114059079B (en) | 2023-05-02 |
Family
ID=80279086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111387525.1A Active CN114059079B (en) | 2021-11-22 | 2021-11-22 | Thermal self-sustaining concentrating photovoltaic electrolytic hydrogen production reaction system based on severe conditions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114059079B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114719452B (en) * | 2022-03-17 | 2023-12-29 | 上海理工大学 | Domestic solar thermoelectric hydrogen energy storage utilization system based on nanofluid frequency division |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103436906B (en) * | 2013-08-27 | 2016-08-24 | 北京航空航天大学 | A kind of light splitting photovoltaic and photothermal associating hydrogen generating system and using method thereof |
| CN211471573U (en) * | 2019-11-04 | 2020-09-11 | 合肥阳光新能源科技有限公司 | New energy hydrogen production system and heat preservation device thereof |
| CN112575337A (en) * | 2020-12-17 | 2021-03-30 | 南京协鑫新能源动力技术研究院有限公司 | Photovoltaic hydrogen production equipment and system thereof |
-
2021
- 2021-11-22 CN CN202111387525.1A patent/CN114059079B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN114059079A (en) | 2022-02-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Li et al. | Solar energy utilisation: Current status and roll-out potential | |
| JP6502580B2 (en) | Integrated solar energy utilization apparatus and system | |
| US7051529B2 (en) | Solar dish concentrator with a molten salt receiver incorporating thermal energy storage | |
| Yu et al. | Research progress on utilization of phase change materials in photovoltaic/thermal systems: A critical review | |
| CN101022138A (en) | Solar photovoltaic/photothermal combined apparatus | |
| CN103438586B (en) | Solar energy optical-thermal collector, photo-thermal electricity collection plate and solar heating hot-water heating system | |
| CN109209795A (en) | A kind of Bretton photo-thermal power generation method and system of improvement | |
| CN102867878B (en) | A kind of cogeneration photovoltaic and photothermal assembly, co-generation unit and photovoltaic electric station | |
| CN101126553A (en) | Solar boiler | |
| CN113512730B (en) | Floating solar photovoltaic photo-thermal coupling electrolytic water hydrogen production system and method | |
| CN102787981B (en) | Solar energy storage power generation system | |
| CN107947642A (en) | A kind of heat-pipe type concentrating photovoltaic photo-thermal thermo-electric generation integral system | |
| CN109883230A (en) | Fused salt thermal storage and energy accumulation electricity generation system and energy-accumulating power station comprising it | |
| CN114059079B (en) | Thermal self-sustaining concentrating photovoltaic electrolytic hydrogen production reaction system based on severe conditions | |
| CN113755868A (en) | Hydrogen production equipment | |
| CN108800605A (en) | A kind of solar energy heat collection pipe and thermo-electric generation system | |
| CN111416549A (en) | Solar cavity type temperature difference power generation device based on micro heat pipe | |
| CN201062884Y (en) | Solar energy heating device | |
| CN202170852U (en) | High-efficiency solar thermal tower type electric power generation and seawater desalination integrated system | |
| CN202082057U (en) | Hot-sand heat-storage solar disc Strling generator | |
| CN112577032A (en) | Solar phase-change heat storage type steam boiler system | |
| CN215713419U (en) | Hydrogen production equipment | |
| WO2019085785A1 (en) | Disc-type photothermal power generation system | |
| CN103626126A (en) | Solar thermal-arrest hydrogen production equipment | |
| CN201017894Y (en) | Solar photovoltaic/photothermal coupling device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |