Diversified renewable energy system

Abstract

The invention relates to the technical field of renewable energy systems, and particularly provides a diversified renewable energy system which comprises a green electric energy supply system, a water adding system, an SOEC system, an SOFC system, a bidirectional energy supply connection system, a hydrogenation system and a charging system. A diversified renewable energy system of the present invention includes a solid oxide fuel cell (SOFC) system that generates power from one or more green clean renewable energy inputs, and also includes a solid oxide electrolysis cell (SOEC) system coupled to the SOFC system, the SOEC system facilitating the generation of hydrogen from power and water inputs received from a green power supply system or the SOFC system, according to the diversified renewable energy source system, the SOFC system facilitates charging of electric equipment or power supply to related loads, the SOEC system facilitates hydrogenation of hydrogen fuel equipment and stores generated hydrogen in a hydrogen storage tank, and by means of the diversified renewable energy source system, carbon emission can be reduced to a great extent, and the application prospect is wide.

Description

Technical Field

[0001] The present invention belongs to the technical field of renewable energy systems, and in particular relates to a diversified renewable energy system. Background Art

[0002] Currently, public facilities for charging and refueling electric and hydrogen vehicles are scarce and sometimes unreliable, and this infrastructure is a key limitation to achieving zero-emission transportation.

[0003] Current hydrogen car charging stations refill hydrogen by transporting compressed hydrogen, so these stations often fail to operate properly due to hydrogen transportation or mechanical problems. Compressed hydrogen is not as widely available as gasoline or diesel fuel, and requires extensive technical expertise to transfer between different locations and distribute to hydrogen cars. Delivering hydrogen to gas stations is far less reliable than transporting gasoline. Therefore, most compressed hydrogen is currently produced using natural gas, rather than using zero-carbon energy. Therefore, new energy (zero-carbon) vehicles are forced to use carbon-based methods to produce fuel, which defeats the main purpose of adopting new energy vehicles.

[0004] In addition, most current electric vehicle charging piles use AC power from the external power grid, and then convert the AC power into DC power to charge electric vehicles. The AC power from the external power grid is unreliable, has power shortages, and has high surcharges. In addition, demand charges are levied on AC power consumption from the external power grid according to different time periods. For example, charging during the day will cost more than charging at night. In order to offset the demand charges, current charging pile providers are installing battery systems that allow them to charge electric vehicles quickly and slow down battery charging. However, the AC power from the external power grid has a high carbon footprint, which does not provide a cleaner solution than the usual hydrocarbon fuel vehicles.

[0005] Based on the above, a combined clean engine solution is needed to charge electric vehicles and refuel hydrogen fuel cell vehicles with zero or very low carbon emissions, in addition to providing other technical benefits. Summary of the invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a diversified renewable energy system to produce hydrogen, provide basic energy to facilities, and provide electricity to charge electric vehicles (EVs) or provide electricity to public facilities. Through this system, the current zero-carbon energy supply problem can be truly solved.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solutions: a diversified renewable energy system, including a green electric energy supply system, and also including a water supply system, a SOEC system, a SOFC system, a two-way energy supply connection system, a hydrogenation system and a charging system; The green power supply system is connected to the SOEC system, wherein the green power supply system further comprises an energy storage unit 1, the energy storage unit 1 is a chemical energy storage unit, and the energy storage unit 1 is used to adjust power fluctuations and provide a stable power supply for the lower end SOEC system; The output end of the water adding system is connected to the SOEC system, and the water adding system is used to provide the water raw material for the SOEC system in the water electrolysis hydrogen production; The SOEC system is coupled to the SOFC system, the SOEC system and the SOFC system are connected via a two-way energy supply connection system, and the SOEC system is also connected to a hydrogenation system, wherein the hydrogenation system includes a hydrogen storage unit 1 and a hydrogenation unit; The two-way energy supply connection system includes a hydrogen storage unit 2 and an energy storage unit 3. The SOEC system generates hydrogen and oxygen by electrolyzing water. The oxygen is discharged into the atmosphere through an exhaust pipe. The hydrogen is pressurized by a compressor and stored in the hydrogen storage unit 2 and the hydrogen storage unit 1. The hydrogen in the hydrogen storage unit 2 is used to generate electricity for the SOFC system. The hydrogen in the hydrogen storage unit 1 is supplied to the hydrogenation unit. The hydrogenation unit is used to add hydrogen to equipment that needs to be filled with hydrogen. The energy storage unit 2 is a chemical energy storage unit, which is used to temporarily store the electricity generated by the SOFC system and to provide a stable power supply for the SOEC system in reverse. The output end of the SOFC system is also connected to a charging system, which includes an energy storage unit three and a charging unit. The energy storage unit three is a chemical energy storage unit, which temporarily stores the electricity generated by the SOFC system and provides a stable power supply for subsequent charging units. The charging unit is used to charge devices that need to be charged or to power other loads.

[0008] Preferably, the output power source of the green power supply system is at least one of a photovoltaic power generation unit, a wind power generation unit and other green energy sources, wherein the other green energy sources include nuclear power generation, hydropower generation and biomass power generation.

[0009] Preferably, the hydrogen storage unit 1 is a hydrogen storage tank, which is used as a temporary storage for the hydrogen generated by the SOEC system and provides a stable hydrogen source for the subsequent hydrogenation unit.

[0010] Preferably, the second hydrogen storage unit is a hydrogen storage tank, which temporarily stores the hydrogen generated by the SOEC system and provides a stable hydrogen source for the SOFC system.

[0011] Preferably, the SOEC system comprises one of a single electrolyser cell or a stack of electrolyser cells.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the diversified renewable energy system of the present invention includes a solid oxide fuel cell SOFC system that generates electricity from one or more green clean renewable energy inputs, and also includes a solid oxide electrolyzer cell SOEC system coupled to the SOFC system. The SOEC system is convenient for generating hydrogen from electricity and water input received from a green power supply system or a SOFC system. The SOFC system is convenient for facilitating the charging of electric equipment or powering related loads. The SOEC system is convenient for hydrogenating hydrogen fuel equipment and storing the generated hydrogen in a hydrogen storage tank. The use of this diversified renewable energy system can greatly reduce carbon emissions and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the system of the present invention.

[0014] In the figure: 1. Green power supply system; 101. Photovoltaic power generation unit; 102. Wind power generation unit; 103. Other green energy; 104. Energy storage unit one; 2. Water adding system; 3. SOEC system; 4. SOFC system; 5. Bidirectional energy supply connection system; 501. Hydrogen storage unit two; 502. Energy storage unit two; 6. Hydrogenation system; 601. Hydrogen storage unit one; 602. Hydrogenation unit; 7. Charging system; 701. Energy storage unit three; 702. Charging unit. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0016] Refer to the following Figure 1 A diversified renewable energy system provided by an embodiment of the present application is described.

[0017] A diversified renewable energy system includes a green power supply system 1, a water supply system 2, a SOEC system 3, a SOFC system 4, a two-way energy supply connection system 5, a hydrogenation system 6 and a charging system 7; The green power supply system 1 is connected to the SOEC system 3, wherein the green power supply system 1 further comprises an energy storage unit 104, which is a chemical energy storage unit. The energy storage unit 104 is used to adjust power fluctuations and provide a stable power supply for the lower SOEC system 3. Since the front-end power supply is not a stable power supply obtained from the power grid, there is a certain volatility. For example, photovoltaic power generation has no power generation capacity at night. Therefore, the chemical energy storage unit can be used with the front-end green power supply to provide a stable power supply for the renewable energy system, and different capacity energy storage units can be configured according to different scene requirements to provide different solutions; The output end of the water adding system 2 is connected to the SOEC system 3. The water adding system 2 is used to provide the SOEC system 3 with the necessary water raw material for water electrolysis hydrogen production. The water is a green renewable energy. The SOEC system 3 is coupled to the SOFC system 4, and the SOEC system 3 and the SOFC system 4 are connected via a bidirectional energy supply connection system 5. The SOEC system 3 is also connected to a hydrogenation system 6, wherein the hydrogenation system 6 includes a hydrogen storage unit 601 and a hydrogenation unit 602; The two-way energy supply connection system 5 includes a hydrogen storage unit 2 501 and an energy storage unit 2 502. The SOEC system 3 generates hydrogen and oxygen by electrolyzing water. The oxygen is discharged into the atmosphere through an exhaust pipe. The hydrogen is pressurized and stored in the hydrogen storage unit 2 501 and the hydrogen storage unit 1 601 by a compressor. The hydrogen in the hydrogen storage unit 2 501 is used to generate electricity for the SOFC system 4. The hydrogen in the hydrogen storage unit 1 601 is supplied to the hydrogenation unit 602. The hydrogenation unit 602 is used to hydrogenate equipment that needs to be filled with hydrogen, including but not limited to hydrogen fuel cell vehicles, hydrogen transport vehicles, etc. Energy storage unit 2 502 is a chemical energy storage unit, which temporarily stores the electricity generated by SOFC system 4 and provides a stable power supply to SOEC system 3 in reverse; The output end of the SOFC system 4 is also connected to the charging system 7, which includes an energy storage unit 3 701 and a charging unit 702. The energy storage unit 3 701 is a chemical energy storage unit, which temporarily stores the electricity generated by the SOFC system 4 and provides a stable power supply for the subsequent charging unit 702. The charging unit 702 is used to charge equipment that needs to be charged. The charging object can be a land vehicle, such as a car, truck, bus, train, motorcycle, all-terrain vehicle, snowmobile, tractor, lawn mower, etc. The charging unit 702 can also be used to supply power to other loads, such as residential power supply and factory power supply. DC power can also be provided to the SOEC system 3 to produce hydrogen when needed.

[0018] Furthermore, the output power source of the green power supply system 1 is at least one of the photovoltaic power generation unit 101, the wind power generation unit 102 and other green energy 103, wherein the other green energy 103 includes nuclear power generation, hydropower generation and biomass power generation. Photovoltaic power generation, wind power generation, hydropower generation and other energies are all green renewable energy sources, and these energies can all be used as power sources for the diversified renewable energy system.

[0019] Furthermore, the hydrogen storage unit 1 601 is a hydrogen storage tank, which is used as a temporary storage for the hydrogen produced by the SOEC system 3 and provides a stable hydrogen source for the subsequent hydrogenation unit 602 to add hydrogen.

[0020] In a further embodiment, the hydrogen storage unit 2 501 is a hydrogen storage tank, which is used as a temporary storage for the hydrogen generated by the SOEC system 3 and provides a stable hydrogen source for the SOFC system 4 .

[0021] In further embodiments, the SOEC system 3 includes one of a single electrolyzer cell or a stack of electrolyzer cells.

[0022] The specific working process of a diversified renewable energy system of the present application is described in combination with the above embodiments: S1: The photovoltaic power generation unit 101, the wind power generation unit 102 and other green energy sources 103 operate to generate green electricity, and the power fluctuation is adjusted through the energy storage unit 104 to provide a stable power supply for the lower SOEC system 3. In addition, when there is no light at night or there is no wind, the front-end green power supply is insufficient, and the energy storage unit 104 plays the role of providing a certain period of backup power.

[0023] S2: When the conditions of electricity and water are met, the SOEC system 3 starts to operate stably, generating hydrogen and oxygen by electrolyzing water. The oxygen is discharged into the atmosphere through the exhaust pipe, and the hydrogen is pressurized and stored in the hydrogen storage unit 2 501 and the hydrogen storage unit 1 601 through the compressor system, which can be used for power generation by the SOFC system 4 or hydrogen refueling by hydrogen fuel vehicles. The size of the hydrogen storage unit is determined after comprehensive evaluation of the amount of hydrogen used, electricity used, and the cost of the energy storage unit in the actual scenario.

[0024] S3: When sufficient hydrogen is provided, the SOFC system 4 starts to operate stably and generates direct current through electrochemical reaction, which can provide power to electric vehicles. In addition, it can also provide the necessary control power supply for the SOEC system 3, and can also provide power to public facilities after inversion.

[0025] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0026] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A diversified renewable energy system, comprising a green power supply system (1), characterized in that: It also includes a water adding system (2), a SOEC system (3), a SOFC system (4), a two-way energy supply connection system (5), a hydrogen adding system (6) and a charging system (7); The green power supply system (1) is connected to the SOEC system (3), wherein the green power supply system (1) further comprises an energy storage unit 1 (104), wherein the energy storage unit 1 (104) is a chemical energy storage unit, and the energy storage unit 1 (104) is used to adjust power fluctuations and provide a stable power supply for the lower SOEC system (3); The output end of the water adding system (2) is connected to the SOEC system (3), and the water adding system (2) is used to provide the water raw material for water electrolysis hydrogen production to the SOEC system (3); The SOEC system (3) is coupled to the SOFC system (4), the SOEC system (3) and the SOFC system (4) are connected via a bidirectional energy supply connection system (5), and the SOEC system (3) is also connected to a hydrogenation system (6), wherein the hydrogenation system (6) comprises a hydrogen storage unit 1 (601) and a hydrogenation unit (602); The bidirectional energy supply connection system (5) comprises a hydrogen storage unit 2 (501) and an energy storage unit 2 (502). The SOEC system (3) generates hydrogen and oxygen by electrolyzing water. The oxygen is discharged into the atmosphere through an exhaust pipe. The hydrogen is pressurized by a compressor and stored in the hydrogen storage unit 2 (501) and the hydrogen storage unit 1 (601). The hydrogen in the hydrogen storage unit 2 (501) is supplied to the SOFC system (4) for power generation. The hydrogen in the hydrogen storage unit 1 (601) is supplied to the hydrogenation unit (602). The hydrogenation unit (602) is used to hydrogenate equipment that needs to be filled with hydrogen. The energy storage unit 2 (502) is a chemical energy storage unit that temporarily stores the electricity generated by the SOFC system (4) and provides a stable power supply to the SOEC system (3). The output end of the SOFC system (4) is also connected to a charging system (7), wherein the charging system (7) comprises an energy storage unit three (701) and a charging unit (702), wherein the energy storage unit three (701) is a chemical energy storage unit, which temporarily stores the electricity generated by the SOFC system (4) and provides a stable power supply for the subsequent charging unit (702), and the charging unit (702) is used to charge a device that needs to be charged or to supply power to other loads.

2. A diversified renewable energy system according to claim 1, characterized in that: The output power source of the green power supply system (1) is at least one of a photovoltaic power generation unit (101), a wind power generation unit (102) and other green energy (103), wherein the other green energy (103) includes nuclear power generation, hydropower generation and biomass power generation.

3. The diversified renewable energy system according to claim 1, characterized in that: The hydrogen storage unit 1 (601) is a hydrogen storage tank, which is used to temporarily store the hydrogen generated by the SOEC system (3) and provide a stable hydrogen source for the subsequent hydrogenation unit (602).

4. The diversified renewable energy system according to claim 1, characterized in that: The second hydrogen storage unit (501) is a hydrogen storage tank, which temporarily stores the hydrogen generated by the SOEC system (3) and provides a stable hydrogen source for the SOFC system (4).

5. The diversified renewable energy system according to claim 1, characterized in that: The SOEC system (3) comprises one of a single electrolyser cell or a stacked electrolyser cell.

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