A hydrogen production and power generation combined system based on all-weather scheduling of wind resources

Abstract

The present invention discloses a hydrogen production and power generation combined system based on all-weather scheduling of wind resources, which specifically includes core components such as a tower, an impeller, an intelligent controller, a wind turbine, a main transmission shaft, an adiabatic heater, and a sandwich-type solar thermal hydrogen production reactor. The aim is to achieve all-weather and time-segmented orderly scheduling and distribution of wind resources in remote areas of China and improve the overall conversion efficiency of terminal energy. The system converts part of the wind energy into heat energy to realize the solar thermal co-production of hydrogen reaction, increasing the conversion gain of unit wind energy, and the remaining wind energy can be converted into electric energy at night for the daily use of nearby residents. The system selectively uses hydrogen energy as the energy carrier at the terminal, greatly reducing the infrastructure cost and energy loss of traditional power transmission. The system of the present invention has the characteristics of good integration, high intelligence, simple and efficient operation, etc.

Description

Technical Field

[0001] The present invention belongs to the field of new energy preparation, and particularly relates to a hydrogen production and power generation combined system based on all-weather scheduling of wind resources. Background Art

[0002] Fully exploring and effectively utilizing renewable energy sources such as solar energy, wind energy, hydrogen energy, geothermal energy, and water energy helps to accelerate the upgrading of the energy industrial structure and promote the innovation of energy and the transformation of its consumption forms. However, in terms of the current utilization forms of wind energy resources, there are mainly two international methods: wind heating and power generation. Currently, the main method on the market is still windmill power generation. Its core process is to drive a generator set through a wind turbine impeller and then use it locally or transmit it to the grid. Investigation and analysis found that although the installed capacity of wind turbines is increasing year by year, the growth rate cannot effectively relieve the electricity pressure in urban and rural areas of our country. The main contradiction here is that the utilization method of wind energy resources is too single, and there is disharmony between the timely consumption of generated electric energy, grid connection loss, cost, etc. This contradiction is particularly prominent in the western regions of our country, greatly restricting the utilization and conversion of wind energy resources by the country.

[0003] The process of solar photothermal co-catalytic hydrogen production can efficiently, low-costly, pollution-free, and mildly convert solar energy into hydrogen energy for utilization, storage, and transportation. However, this technology has strict requirements for the light absorption properties of the hydrogen production semiconductor particle suspension. Only when its light absorption range reaches the near-infrared light region will obvious heat be generated. If part of the wind energy resources can be converted into heat and supplied to the hydrogen production system in an orderly manner under the action of solar radiation during the day, the efficiency of the hydrogen production end can be greatly improved. In addition, the wind power system can still be used for power generation and transmitted to local residents for use at night. This storage and utilization method with hydrogen energy as the energy carrier can effectively avoid the problems of long-distance power transmission energy loss of wind turbine power generation and high costs and high risks of pre-construction auxiliary facilities.

[0004] At present, there are almost no reports on the technology of efficiently synergistically utilizing solar hydrogen production and wind energy resources in China. Therefore, developing and exploring this hydrogen / electricity complementary conversion and coupling utilization mode has important research value for the large-scale low-cost utilization of wind energy and solar energy resources in China and the transformation of the energy system structure. Summary of the Invention

[0005] The purpose of the present invention is to provide a hydrogen production and power generation combined system based on all-weather scheduling of wind resources. By using this device, continuous supply of electric energy and hydrogen energy can be realized in remote areas of our country. At the same time, the process of photothermal coupling hydrogen production can be completed, the conversion efficiency of solar energy can be improved, the utilization forms of wind energy resources are fully coordinated and reasonably distributed, and the maximum utilization of renewable energy is achieved.

[0006] To achieve the above object, the present invention adopts the following solutions to implement:

[0007] A hydrogen production and power generation combined system based on all-weather scheduling of wind resources. There are three forms of energy conversion inside the system; the first is the conversion from wind energy to electrical energy, including: an impeller located on a tower is connected to an intelligent controller, a wind turbine is arranged at the downstream end of the intelligent controller, a power storage device is arranged at the downstream end of the wind turbine, and the electrical energy stored inside the power storage device is used to supply electrical appliances; the second is the conversion from wind energy to heat energy, including: an impeller located on a tower is connected to an intelligent controller, an adiabatic heater is arranged at the downstream end of the intelligent controller, a main transmission shaft and four auxiliary transmission shafts are arranged inside the adiabatic heater, and shearing slices are arranged on the four auxiliary transmission shafts from top to bottom in sequence. A heat storage fluid tank, a circulating power pump, and a sandwich-type photothermal hydrogen production reactor are arranged outside the adiabatic heater in sequence. A heat transfer fluid working medium is placed inside the heat storage fluid tank, and the heat transfer fluid working medium generates heat due to friction under the shearing action of the shearing slices; the third is the conversion from solar energy to hydrogen energy, including: a liquid storage tank, a suspension containing a photocatalytic semiconductor is placed inside the liquid storage tank, a peristaltic pump is arranged at the downstream end of the liquid storage tank, a sandwich-type photothermal hydrogen production reactor is arranged at the downstream end of the peristaltic pump, the top of the liquid storage tank is connected to a gas dryer, a gas compressor is arranged downstream of the gas dryer, a hydrogen cylinder is arranged downstream of the gas compressor. The sandwich-type photothermal hydrogen production reactor is composed of an inner photocatalytic reaction tube, a vacuum layer tube, and a heat transfer fluid tube group layer. The vacuum layer tube and the heat transfer fluid tube are located on the outer ring of the photocatalytic reaction tube, each occupying a semi-circular area, and the connection part is sealed with quartz glass. A parabolic concentrator is arranged behind the sandwich-type photothermal hydrogen production reactor; during operation, the heat transfer fluid working medium in the heat storage fluid tank will pass through the heat transfer fluid tube, the suspension of the photocatalytic semiconductor absorbs solar energy in the photocatalytic reaction tube and generates hydrogen, and gas-liquid separation occurs above the liquid storage tank under the drive of the peristaltic pump.

[0008] A further improvement of the present invention is that the kinetic energy generated by the impeller on the tower under the drive of wind is transmitted to the wind turbine or the main transmission shaft.

[0009] A further improvement of the present invention is that during the day, the kinetic energy of the impeller is transmitted to the main transmission shaft to complete the heating process of the heat transfer fluid working medium in the adiabatic heater, and then the heat is transmitted to the sandwich-type photothermal hydrogen production reactor to realize photothermal coupling hydrogen production; during the night, the kinetic energy of the impeller is transmitted to the wind turbine to generate electrical energy and store it in the power storage device, and the stored electrical energy meets the electricity consumption of nearby residents; the intelligent controller can complete the intelligent identification in different seasons and the active distribution of the kinetic energy of the impeller, realizing the all-weather and effective utilization of wind resources.

[0010] A further improvement of the present invention is that the heat transfer fluid working medium flows into the adiabatic heater from the downstream end and flows out from the upstream section.

[0011] A further improvement of the present invention lies in that the main drive shaft and the four auxiliary drive shafts transmit power through gear meshing. The auxiliary drive shafts are arranged in central symmetry with the main drive shaft as the center, and the shear slices on the auxiliary drive shafts are in the shape of oblique triangular waves to increase the contact area with the heat transfer fluid medium and enhance the shear heating effect.

[0012] A further improvement of the present invention lies in that the sandwich type solar hydrogen production reactor is surrounded by a parabolic concentrator, and the parabolic concentrator is defaultly placed at an elevation angle of 45°.

[0013] A further improvement of the present invention lies in that fluid outlets and inlets are respectively arranged on the upper and lower sides of the left and right ends of the heat transfer fluid pipe, and the connecting line of the cut-off positions on both sides of the heat transfer fluid pipe is at 45° to the horizontal plane.

[0014] A further improvement of the present invention lies in that the start-stop duration of the circulation power pump can be customarily set. If a higher temperature of the heat transfer fluid medium is required, the stop time of the circulation power pump can be extended, and vice versa.

[0015] A further improvement of the present invention lies in that the heat transfer fluid medium in the adiabatic heater is heat-conducting oil or a fluid containing metal nanoparticles.

[0016] A further improvement of the present invention lies in that the photocatalytic semiconductor of the liquid storage tank is TiO2, ZnO, CuO or C3N4.

[0017] Compared with the prior art, the present invention has at least the following beneficial technical effects:

[0018] The technology of the present invention realizes the dynamic allocation of the power generation and heating processes of wind resources. Compared with traditional wind power generation, this system can transport part of the heat to the solar hydrogen production system to complete photo-thermal coupling hydrogen production, greatly improving the hydrogen production efficiency. And the kinetic energy of the wind turbine is used for heating during the day to strengthen the hydrogen production process, and the power generated at night is supplied to the surrounding residents for use.

[0019] It reduces the costs such as the traditional power grid connection and the layout of the power system network. It realizes the complementary interchange process of secondary energy sources such as hydrogen / electricity, and expands the energy use structure of residents in remote areas. And the redundant hydrogen energy can be compressed and transported to other places, which is simple and fast.

[0020] In the system, the auxiliary drive shafts are arranged in central symmetry with the main drive shaft as the center. And the shear slices on the auxiliary drive shafts are in the shape of oblique triangular waves, increasing the contact area with the heat transfer fluid medium. And when working, the unit resistance between the shear slices and the heat transfer fluid is large, and the heat generated per unit volume of thermal friction is high.

[0021] The intelligent controller in the system can intelligently identify the solar radiation intensity in the weather and the sunshine duration under different seasonal conditions, etc., selectively regulate the power transmission direction of the fan impeller, realize the random dynamic scheduling of power generation and heating, and can achieve remote control and programmed control, saving labor.

[0022] The start and stop duration of the circulating power pump can be custom-set. If a higher temperature of the heat transfer fluid medium is required, the stop time of the circulating power pump can be extended, and vice versa.

[0023] The sandwich-type photothermal hydrogen production reactor is integrated with a vacuum layer tube, a heat transfer fluid tube, a photocatalytic reaction tube, etc., with clear functions. The heat transfer fluid tube can orderly transfer the wind power heating to the photocatalytic reaction liquid to realize the hydrogen production process under the coupling of the photothermal field. The vacuum layer design avoids unnecessary heat loss and maximizes the thermal energy utilization efficiency. Brief Description of the Drawings

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0025] Description of the Reference Numerals in the Drawings:

[0026] 1 is the tower; 2 is the impeller; 3 is the intelligent controller; 4 is the wind power motor; 5 is the energy storage device; 6 is the electrical appliance; 7 is the adiabatic heater; 8 is the auxiliary transmission shaft; 9 is the main transmission shaft; 10 is the shear slice; 11 is the heat storage fluid tank; 12 is the circulating power pump; 13 is the sandwich-type photothermal hydrogen production reactor; 14 is the photocatalytic reaction tube; 15 is the heat transfer fluid tube; 16 is the vacuum layer tube; 17 is the parabolic concentrator; 18 is the liquid storage tank; 19 is the peristaltic pump; 20 is the gas dryer; 21 is the gas compressor; 22 is the hydrogen cylinder. Detailed Description of the Invention

[0027] The present invention will be further described in detail below with reference to the accompanying drawings through specific embodiments.

[0028] As Figure 1As shown in the figure, inside the hydrogen production and power generation combined system based on all-weather scheduling of wind energy resources provided by the present invention, there are conversions of three energy forms. The first is the conversion of wind energy to electrical energy: The impeller 2 located on the tower 1 is connected to the intelligent controller 3. The downstream end of the intelligent controller 3 is connected to the wind power generator 4. The downstream end of the wind power generator 4 is connected to the energy storage device 5. The electrical energy stored inside the energy storage device 5 can be supplied to the electrical appliance 6. The second is the conversion of wind energy to heat energy: The impeller 2 located on the tower 1 is connected to the intelligent controller 3. The downstream end of the intelligent controller 3 is provided with an adiabatic heat generator 7. The adiabatic heat generator 7 is filled with a heat transfer fluid working medium. Inside the adiabatic heat generator 7, there is also a main transmission shaft 9 and four auxiliary transmission shafts 8. Four shear slices 10 are successively arranged on the four auxiliary transmission shafts 8 from top to bottom. During operation, the impeller finally transfers the wind energy to the auxiliary transmission shaft 8 and drives the shear slices 10 to rotate together to cut the heat transfer fluid for heating. An energy storage fluid tank 11, a circulation power pump 12, a sandwich-type photothermal hydrogen production reactor 13, etc. are successively arranged outside the adiabatic heat generator 7 to form a circulation loop. The energy storage fluid tank 11 contains a heat transfer fluid working medium. The heat transfer fluid working medium generates heat due to friction under the shearing action of the shear slices 10. The third is the conversion of solar energy to hydrogen energy: A suspension containing a photocatalytic semiconductor is placed in the liquid storage tank 18. The downstream end of the liquid storage tank 18 is provided with a peristaltic pump 19. The downstream end of the peristaltic pump 19 is provided with a sandwich-type photothermal hydrogen production reactor 13. The top of the liquid storage tank 18 is connected to the gas dryer 20, which can not only store the particulate suspension liquid but also serve as a gas-liquid separation device. The gas dryer 20 dries the generated hydrogen and transports it to the gas compressor 21 at the downstream end to complete the pressurization process. A hydrogen cylinder 22 is arranged downstream of the gas compressor, and the hydrogen with a certain pressure can be transported to other places for use, which is simple and convenient. The sandwich-type photothermal hydrogen production reactor 13 is composed of an inner-layer photocatalytic reaction tube 14, a vacuum layer tube 16, and a heat transfer fluid tube 15. The vacuum layer tube 16 and the heat transfer fluid tube 15 are located on the outer ring of the photocatalytic reaction tube 14, each occupying a semi-circular area, and the connection is sealed with quartz glass. The vacuum layer 16 can play a heat insulation role when irradiated by the sun to avoid heat exchange loss. A parabolic concentrator 17 is arranged behind the sandwich-type photothermal hydrogen production reactor 13, which can reuse the secondary solar radiation energy. During operation, the heat transfer fluid working medium in the energy storage fluid tank 11 will pass through the heat transfer fluid tube 15. The suspension of the photocatalytic semiconductor absorbs solar energy in the photocatalytic reaction tube 14 and generates hydrogen, and gas-liquid separation occurs above the liquid storage tank 18 under the drive of the peristaltic pump 19.

[0029] Preferably, the kinetic energy generated by the impeller 2 on the tower 1 can be selectively transmitted to the wind turbine 4 or the main transmission shaft 9. In this system, it is generally defaulted that during the day, the kinetic energy is transmitted to the main transmission shaft 9 and used to complete the heating process of the heat transfer fluid working medium in the adiabatic heater 7, and then the heat is transferred to the heat transfer fluid pipe 15 outside the sandwich photothermal hydrogen production reactor 13 to realize the photothermal coupling hydrogen production process. During the night, the kinetic energy is transmitted to the wind turbine 4 to generate electric energy and stored in the energy storage device 5, and the stored electric energy can meet the electricity consumption of nearby residents. The intelligent controller 3 can complete the intelligent identification in different seasons at the above critical moments and the active distribution of the kinetic energy of the impeller 2, realizing the all-weather effective utilization of wind resources.

[0030] Preferably, the heat transfer fluid working medium flows into the adiabatic heater 7 from the downstream end and flows out from the upstream section. The main transmission shaft 9 and the four auxiliary transmission shafts 8 transmit power through gear meshing. The auxiliary transmission shafts 8 are symmetrically arranged around the main transmission shaft 9. And the shear slices 10 on the auxiliary transmission shafts 8 are in the shape of an inclined triangular wave, increasing the contact area with the heat transfer fluid working medium and improving the shear heating effect.

[0031] Preferably, the sandwich photothermal hydrogen production reactor 13 is surrounded by a parabolic concentrator 17, and the parabolic concentrator 17 is defaulted to be placed at an elevation angle of 45°. The heat transfer fluid pipe 15 is provided with a fluid outlet and an inlet on the upper and lower sides of the left and right ends respectively. The connecting line of the cut-off positions on both sides of the heat transfer fluid pipe 15 is also at 45° to the horizontal plane, which is convenient for transmitting the light reflected by the parabolic concentrator 17 to the sandwich photothermal hydrogen production reactor 13.

[0032] Preferably, the start-stop duration of the circulation power pump 12 can be custom-set according to the user's needs or objective characteristics such as climate irradiation. If a higher temperature of the heat transfer fluid working medium is required, the stop time of the circulation power pump 12 can be extended, and vice versa.

[0033] Preferably, the heat transfer fluid working medium in the adiabatic heater 7 is generally a fluid with high viscosity and excellent thermal conductivity, such as heat-conducting oil, fluid containing metal nanoparticles, etc.

[0034] Preferably, the photocatalytic semiconductor in the liquid storage tank 18 can be common TiO2, ZnO, CuO, C3N4, etc., and its hydrogen production performance under photothermal coupling conditions is generally improved by 1-2 orders of magnitude compared with the single photocatalytic hydrogen production process.

[0035] Preferably, the hydrogen production rate of this system can be regulated by the elevation angle change of the parabolic concentrator 17 and the temperature of the heat transfer fluid working medium, etc.

[0036] Preferably, the pressure of the hydrogen compressed by the gas compressor 21 can be intelligently set according to the user's usage scenario, etc.

[0037] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it on the basis of the present invention, which will be obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

Claims

1. A hydrogen production and power generation combined system based on all-weather scheduling of wind resources, characterized in that, There are three forms of energy conversion within the system; The first is the conversion of wind energy to electrical energy, including: an impeller (2) located on a tower (1) is connected to an intelligent controller (3), a wind power generator (4) is provided at the downstream end of the intelligent controller (3), a power storage device (5) is provided at the downstream end of the wind power generator (4), and the electrical energy stored inside the power storage device (5) is used to supply an electrical appliance (6); the second is the conversion of wind energy to heat energy, including: an impeller (2) located on a tower (1) is connected to an intelligent controller (3), an adiabatic heater (7) is provided at the downstream end of the intelligent controller (3), a main transmission shaft (9) and four auxiliary transmission shafts (8) are provided inside the adiabatic heater (7), shearing slices (10) are successively arranged from top to bottom on the four auxiliary transmission shafts (8), a heat storage fluid tank (11), a circulation power pump (12), and a sandwich-type photothermal hydrogen production reactor (13) are successively arranged outside the adiabatic heater (7), a heat transfer fluid working medium is placed inside the heat storage fluid tank (11), and the heat transfer fluid working medium generates heat due to friction under the shearing action of the shearing slices (10); the third is the conversion of solar energy to hydrogen energy, including: a liquid storage tank (18), a suspension containing a photocatalytic semiconductor is placed inside the liquid storage tank (18), a peristaltic pump (19) is provided at the downstream end of the liquid storage tank (18), a sandwich-type photothermal hydrogen production reactor (13) is provided at the downstream end of the peristaltic pump (19), the top of the liquid storage tank (18) is connected to a gas dryer (20), a gas compressor (21) is provided downstream of the gas dryer (20), a hydrogen cylinder (22) is provided downstream of the gas compressor, the sandwich-type photothermal hydrogen production reactor (13) is composed of an inner-layer photocatalytic reaction tube (14), a vacuum layer tube (16), and a heat transfer fluid tube (15), the vacuum layer tube (16) and the heat transfer fluid tube (15) are located on the outer ring of the photocatalytic reaction tube (14), each occupying a semi-circular area, and the connection is sealed with quartz glass, a parabolic concentrator (17) is provided behind the sandwich-type photothermal hydrogen production reactor (13); during operation, the heat transfer fluid working medium in the heat storage fluid tank (11) will pass through the heat transfer fluid tube (15), the suspension of the photocatalytic semiconductor absorbs solar energy in the photocatalytic reaction tube (14) and generates hydrogen, and gas-liquid separation occurs above the liquid storage tank (18) driven by the peristaltic pump (19).

2. The hydrogen production and power generation combined system based on all-weather scheduling of wind resources according to claim 1, wherein, The kinetic energy generated by the impeller (2) on the tower (1) under the drive of wind is transmitted to the wind power generator (4) or the main transmission shaft (9).

3. A hydrogen production and power generation combined system based on all-weather scheduling of wind resources according to claim 2, characterized in that, During the day, the kinetic energy of the impeller (2) is transmitted to the main transmission shaft (9) to complete the heating process of the heat transfer fluid working medium in the adiabatic heater (7), and then the heat is transmitted to the sandwich-type photothermal hydrogen production reactor (13) to achieve photothermal coupling hydrogen production; during the night, the kinetic energy of the impeller (2) is transmitted to the wind power generator (4) to generate electrical energy and store it in the power storage device (5), and the stored electrical energy meets the electricity consumption of nearby residents; the intelligent controller (3) can complete the intelligent identification in different seasons and the active distribution of the kinetic energy of the impeller (2), realizing the all-weather effective utilization of wind resources.

4. A hydrogen production and power generation combined system based on all-weather scheduling of wind resources according to claim 1, characterized in that, The heat transfer fluid working medium flows into the downstream end of the adiabatic heater (7) and flows out from the upstream section.

5. A hydrogen production and power generation combined system based on all-weather scheduling of wind resources according to claim 1, characterized in that, The main drive shaft (9) and the four auxiliary drive shafts (8) transmit power through gear meshing. The auxiliary drive shafts (8) are arranged centrosymmetrically with the main drive shaft (9) as the center, and the shear slices (10) on the auxiliary drive shafts (8) are in the shape of oblique triangular waves.

6. The hydrogen production and power generation combined system based on all-weather scheduling of wind resources according to claim 1, wherein, The sandwich-type photothermal hydrogen production reactor (13) is surrounded by a parabolic concentrator (17), and the parabolic concentrator (17) is default placed at an elevation angle of 45°.

7. A hydrogen production and power generation combined system based on all-weather scheduling of wind resources according to claim 1, characterized in that, The start-stop duration of the circulating power pump (12) can be custom-set. If a higher temperature of the thermal fluid working medium is required, the stop time of the circulating power pump (12) can be extended, and vice versa.

8. A hydrogen production and power generation combined system based on all-weather scheduling of wind resources according to claim 1, characterized in that, The thermal fluid working medium in the adiabatic heater (7) is heat-conducting oil or a fluid containing metal nanoparticles.

9. A hydrogen production and power generation combined system based on all-weather scheduling of wind resources according to claim 1, characterized in that, The photocatalytic semiconductor in the liquid storage tank (18) is TiO2, ZnO, CuO or C3N4.

Images