A renewable energy comprehensive power generation system suitable for offshore green hydrogen alcohol

Abstract

This utility model discloses a renewable energy integrated power generation system suitable for nearshore green methanol production, including an offshore wind power unit, an offshore photovoltaic unit, a tidal current power unit, and an energy storage sphere unit. By establishing a renewable energy integrated power generation system composed of offshore wind power, offshore photovoltaic, tidal current turbines, and energy storage spheres, the system achieves internal coupling and complementarity of multiple offshore renewable energy power generation methods, realizes zero carbon emissions on the power supply side, and ensures the stability of power supply in the nearshore green methanol production process. Through the balance of power supply and demand between the power supply side and the power demand side of the electro-hydrogen production unit, the system realizes the conversion between pumped water storage and water injection power generation states of the energy storage sphere, completing the self-peak-shaving energy storage of the renewable energy integrated power generation system. Through a CO2 capture device, CO2 emitted by ships is captured in the nearshore area and reacted with green hydrogen to synthesize green methanol, achieving zero carbon emissions in the entire process of green methanol production, and meeting the urgent need for green fuel supply in the marine fuel market.

Description

Technical Field

[0001] This utility model relates to the field of renewable energy and hydrogen energy applications, specifically to a renewable energy integrated power generation system suitable for producing green hydrogen alcohols in nearshore areas. Background Technology

[0002] Currently, the shipping industry is a significant source of global air pollution, primarily using carbon-rich marine diesel (MDO) and heavy fuel oil (HFO). With the development of international trade and the increase in the number of ships, CO2 emissions from the shipping industry continue to rise. The demand for green fuels in the marine fuel market is strong. Methanol can be used directly as fuel, replacing gasoline, diesel, and other liquid fuels, and is an internationally recognized clean fuel. By utilizing CO2 capture devices to capture CO2 emitted by ships in near-shore areas and reacting it with green hydrogen to synthesize green methanol, zero carbon emissions can be achieved throughout the entire green methanol production process, meeting the actual demand for green fuel supply in the marine fuel market.

[0003] Due to the intermittent and fluctuating nature of wind and solar power generation, the stability of electricity supply from renewable energy sources for producing green hydrogen alcohols is uncertain. Furthermore, nearshore areas possess abundant tidal energy and seawater gravitational potential energy, among other renewable energy sources, which can be combined to improve the stability of electricity supply from renewable energy power generation systems relying solely on wind and solar power.

[0004] Currently, European and American countries have proposed underwater concrete energy storage sphere technology. The core of this technology is to use a hollow concrete sphere as an energy storage carrier. When wind and solar power are in surplus, the surplus electricity drives a water pump to evacuate the sphere, converting the electrical energy into the gravitational potential energy of seawater, thus achieving peak power shaving. When wind and solar power supply is insufficient, seawater is poured into the sphere, using the seawater pressure to drive an internal turbine to generate electricity, thus achieving valley filling. This technology combines gravity energy storage with ocean depth, utilizing the topographic difference of the energy storage sphere to perform pumped-storage and water-filled power generation, achieving bidirectional conversion of electrical energy and gravitational potential energy.

[0005] Therefore, in order to improve the feasibility and reliability of nearshore green hydrogen production, achieve comprehensive greening of power supply, promote the sustainable development of renewable energy and hydrogen energy, form a more stable renewable energy power generation system for nearshore green hydrogen production, meet the urgent need of the marine fuel market for green fuel supply, and promote the process of net-zero greenhouse gas emissions from maritime transport, it is essential to propose a comprehensive renewable energy power generation system suitable for nearshore green hydrogen production. Utility Model Content

[0006] The purpose of this utility model is to disclose a renewable energy integrated power generation system suitable for near-shore green hydrogen alcohol production. It can realize pure green power supply and self-peak energy storage of the renewable energy integrated power generation system, improve the green level of power production and application, and provide feasibility and feasibility for centralized supply of green marine fuel demand at close range.

[0007] To achieve the above objectives, the present invention discloses the following technical solutions:

[0008] This utility model discloses a renewable energy integrated power generation system suitable for nearshore green hydrogen alcohol production, comprising:

[0009] Offshore wind power unit, offshore photovoltaic unit, tidal energy unit, energy storage sphere unit, electro-hydrogen production unit, hydrogen storage unit, CO2 capture device, methanol synthesis unit, AC transmission line, hydrogen pipeline, CO2 pipeline;

[0010] Offshore wind power units include several offshore wind turbines, offshore wind power step-up substations, and related collection lines;

[0011] Offshore photovoltaic units include several offshore photovoltaic arrays, offshore photovoltaic step-up substations, and related collection lines;

[0012] The tidal energy unit includes several tidal turbine units, a tidal energy booster substation, and related collection lines;

[0013] The energy storage sphere unit includes several energy storage spheres, an energy storage sphere substation, and related collection lines;

[0014] The electric hydrogen production unit includes a step-down substation and electric hydrogen production equipment;

[0015] The hydrogen storage unit includes hydrogen storage equipment and hydrogen supply pipelines;

[0016] The methanol synthesis unit includes methanol production equipment, methanol storage equipment, and methanol supply pipelines;

[0017] AC transmission lines include wind power AC transmission lines, photovoltaic AC transmission lines, tidal energy AC transmission lines, and energy storage sphere AC transmission lines.

[0018] Preferably, the system comprises an offshore wind power unit, an offshore photovoltaic unit, a tidal energy unit, and an energy storage sphere unit, which together form a renewable energy integrated power generation system and transmits the electricity to the hydrogen production unit.

[0019] Preferably, the near-shore green hydrogen production process consists of an electro-hydrogen production unit, a hydrogen storage unit, a CO2 capture device, a methanol synthesis unit, a hydrogen transportation pipeline, and a CO2 transportation pipeline. The power supply for this process is provided by a renewable energy integrated power generation system, and all of it is renewable energy power.

[0020] Preferably, the offshore wind power unit, offshore photovoltaic unit, tidal energy unit, and energy storage sphere unit in the renewable energy integrated power generation system can select a reasonable power transmission method based on the power demand of the electro-hydrogen production unit:

[0021] When the power demand of the hydrogen production unit is large, the offshore wind power unit will send wind power through the wind power AC transmission line, the offshore photovoltaic unit will send photovoltaic power through the photovoltaic AC transmission line to the hydrogen production unit, the tidal energy unit will send the power generated by the tidal energy through the tidal energy AC transmission line, and the energy storage ball unit will send the power generated by the energy storage ball through the energy storage ball AC transmission line to the hydrogen production unit.

[0022] When the power demand of the hydrogen production unit is low, the offshore wind power unit will send wind power through the wind power AC transmission line, the offshore photovoltaic unit through the photovoltaic AC transmission line, and the tidal energy unit through the tidal energy AC transmission line to the hydrogen production unit to meet its power demand. After this, the AC transmission line of the energy storage sphere will be taken out of operation. The surplus offshore wind power will be sent to the energy storage sphere unit through the wind power AC transmission line, the surplus offshore photovoltaic power through the photovoltaic AC transmission line, and the surplus tidal energy through the tidal energy AC transmission line. The surplus power will be used to drive the energy storage sphere unit to pump water to a vacuum state, converting electrical energy into gravitational potential energy, and providing energy storage and peak shaving for the renewable energy integrated power generation system.

[0023] When only the offshore wind power unit, offshore photovoltaic unit, and tidal energy unit are generating electricity, if the offshore wind power unit and offshore photovoltaic unit are affected by wind and sunshine and their output is low or they stop generating electricity, the wind power AC transmission line, photovoltaic AC transmission line, and tidal energy AC transmission line will stop transmitting power to the energy storage ball unit. The energy storage ball unit will switch from energy storage state to power generation state and transmit the generated power to the hydrogen production unit through the energy storage ball AC transmission line to ensure the power demand of the hydrogen production unit and solve the problem of insufficient power transmission from the offshore wind power unit and offshore photovoltaic unit.

[0024] When the power supply from the offshore wind power unit, offshore photovoltaic unit, and tidal energy unit can meet the power demand of the electro-hydrogen production unit, the energy storage sphere unit stops generating electricity and enters standby or energy storage mode.

[0025] Preferably, after hydrogen is produced by the electro-hydrogen production unit, it is supplied to the hydrogen storage unit and the methanol synthesis unit through hydrogen transmission pipelines, and CO2 is supplied to the methanol synthesis unit through the CO2 capture device and CO2 transmission pipelines.

[0026] Preferably, based on the wind and solar resources, different combinations of renewable energy power generation systems, consisting of offshore wind power units, offshore photovoltaic units, tidal energy units, and energy storage sphere units, can be rationally selected.

[0027] Based on a comprehensive consideration of renewable energy resources, electricity demand in the green hydrogen alcohol production process, and the output of various power sources in the integrated renewable energy power generation system, this utility model proposes a comprehensive renewable energy power generation system suitable for nearshore green hydrogen alcohol production. Through optimization, adjustment, and combination of offshore wind power units, offshore photovoltaic units, tidal energy units, energy storage sphere units, AC transmission lines, electro-hydrogen production units, hydrogen storage units, CO2 capture devices, methanol synthesis units, hydrogen transmission pipelines, and CO2 transmission pipelines, the system achieves self-peak-shaving energy storage and multi-energy conversion of electricity with hydrogen energy and gravitational potential energy, thereby improving the reliability and stability of power supply in the green hydrogen alcohol production process. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the renewable energy integrated power generation system of this utility model, applicable to the near-shore production of green hydrogen alcohol. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0030] This utility model discloses a renewable energy integrated power generation system suitable for near-shore green hydrogen alcohol production, such as... Figure 1 As shown, it includes:

[0031] Offshore wind power unit, offshore photovoltaic unit, tidal energy unit, energy storage sphere unit, electro-hydrogen production unit, hydrogen storage unit, CO2 capture device, methanol synthesis unit, AC transmission line, hydrogen pipeline, CO2 pipeline;

[0032] Offshore wind power units include several offshore wind turbines, offshore wind power step-up substations, and related collection lines;

[0033] Offshore photovoltaic units include several offshore photovoltaic arrays, offshore photovoltaic step-up substations, and related collection lines;

[0034] The tidal energy unit includes several tidal turbine units, a tidal energy booster substation, and related collection lines;

[0035] The energy storage sphere unit includes several energy storage spheres, an energy storage sphere substation, and related collection lines;

[0036] The electric hydrogen production unit includes a step-down substation and electric hydrogen production equipment;

[0037] The hydrogen storage unit includes hydrogen storage equipment and hydrogen supply pipelines;

[0038] The methanol synthesis unit includes methanol production equipment, methanol storage equipment, and methanol supply pipelines;

[0039] AC transmission lines include wind power AC transmission lines, photovoltaic AC transmission lines, tidal energy AC transmission lines, and energy storage sphere AC transmission lines.

[0040] The offshore wind power unit transmits electricity to the hydrogen production unit via wind power AC transmission line 1, the offshore photovoltaic unit via photovoltaic AC transmission line 1, the tidal energy unit via tidal energy AC transmission line 1, and the energy storage ball unit via energy storage ball AC transmission line 1.

[0041] The offshore wind power unit transmits electricity to the energy storage sphere unit via wind power AC transmission line 2, the offshore photovoltaic unit transmits electricity via photovoltaic AC transmission line 2, and the tidal energy unit transmits electricity via tidal energy AC transmission line 2.

[0042] The electric hydrogen production unit delivers green hydrogen to the hydrogen storage unit via hydrogen transmission pipeline 1, and then delivers the green hydrogen to the methanol synthesis unit via hydrogen transmission channel 2.

[0043] The CO2 capture unit delivers CO2 to the methanol synthesis unit via a CO2 pipeline.

[0044] In this embodiment, the power supply for the pumped-storage energy storage unit is provided by the offshore wind power unit, the offshore photovoltaic unit, and the tidal energy unit.

[0045] In this embodiment, the peak-shaving measures of the renewable energy integrated power generation system are achieved by the energy storage ball unit and the hydrogen storage unit. The energy storage ball utilizes the surplus electricity from wind, solar and tidal power to realize the mutual conversion of gravitational potential energy and electrical energy.

[0046] Specifically, the offshore wind power unit, offshore photovoltaic unit, tidal energy unit, and energy storage sphere unit in the renewable energy integrated power generation system can choose a reasonable power transmission method based on the power demand of the electro-hydrogen production unit:

[0047] When the power demand of the hydrogen production unit is large, the offshore wind power unit will send wind power through wind power AC transmission line 1, the offshore photovoltaic unit will send photovoltaic power through photovoltaic AC transmission line 1 to the hydrogen production unit, the tidal energy unit will send the power generated by the tidal energy through tidal energy AC transmission line 1, and the energy storage ball unit will send the power generated by the energy storage ball through the energy storage ball AC transmission line to the hydrogen production unit.

[0048] When the power demand of the hydrogen production unit is low, the offshore wind power unit will send wind power through wind power AC transmission line 1, the offshore photovoltaic unit through photovoltaic AC transmission line 1, and the tidal energy unit through tidal energy AC transmission line 1 to the hydrogen production unit to meet its power demand. After this, the AC transmission line of the energy storage sphere will be taken out of operation. The surplus offshore wind power will be sent to the energy storage sphere unit through wind power AC transmission line 2, the surplus offshore photovoltaic power through photovoltaic AC transmission line 2, and the surplus tidal energy through tidal energy AC transmission line 2. The surplus power will be used to drive the energy storage sphere unit to pump water to a vacuum state, converting electrical energy into gravitational potential energy, which will be used for energy storage and peak shaving of the renewable energy integrated power generation system.

[0049] When only the offshore wind power unit, offshore photovoltaic unit, and tidal energy unit generate electricity, if the offshore wind power unit and offshore photovoltaic unit are affected by wind and sunshine and their output is low or they stop generating electricity, the wind power AC transmission line 2, photovoltaic AC transmission line 2, and tidal energy AC transmission line 2 will stop transmitting electricity to the energy storage ball unit. The energy storage ball unit will switch from energy storage state to power generation state and transmit the generated electricity to the hydrogen production unit through the energy storage ball AC transmission line to ensure the power demand of the hydrogen production unit and solve the problem of insufficient power transmission from the offshore wind power unit and offshore photovoltaic unit.

[0050] When the power supply from the offshore wind power unit, offshore photovoltaic unit, and tidal energy unit can meet the power demand of the electro-hydrogen production unit, the energy storage sphere unit stops generating electricity and enters standby or energy storage mode.

[0051] The present invention proposes a renewable energy integrated power generation system suitable for near-shore green hydrogen alcohol production, which has the following technical advantages:

[0052] By establishing a comprehensive renewable energy power generation system consisting of offshore wind power, offshore photovoltaics, tidal turbines and energy storage spheres, the internal coupling and complementarity of various offshore renewable energy power generation can be achieved, realizing zero carbon emissions on the power supply side and ensuring the stability of power supply in the nearshore green hydrogen production process.

[0053] By balancing the power supply and demand of the offshore wind power unit, offshore photovoltaic unit, tidal energy unit, and energy storage sphere unit with the power demand side of the electro-hydrogen production unit, the switching between pumped water storage and water injection power generation states of the energy storage sphere is achieved. This completes the self-peak-shaving energy storage of the integrated renewable energy power generation system. That is, when the power supply exceeds the demand, the surplus power from wind, solar, and tidal energy is sent to the energy storage sphere unit for pumped water storage; when the power supply falls short of the demand, the energy storage sphere unit sends power to the electro-hydrogen production unit, realizing the internal self-peak-shaving energy storage of the integrated renewable energy power generation system and improving the comprehensive utilization rate of wind, solar, and tidal energy.

[0054] By supplying hydrogen to hydrogen storage and methanol synthesis units through hydrogen production units and hydrogen pipelines, the overall utilization efficiency of green hydrogen energy can be improved, and a dock-type short-distance supply can be provided for green marine fuel demand, thereby enhancing the greenness of hydrogen and methanol use in society.

[0055] By capturing CO2 emitted by ships in near-shore areas using CO2 capture devices, and then reacting it with green hydrogen to synthesize green methanol, the entire process of green methanol production achieves zero carbon emissions, meeting the urgent need of the marine fuel market for green fuel supply.

[0056] Based on the above embodiments, and taking into account factors such as renewable energy resources, electricity demand in the green hydrogen alcohol production process, and the output of various power sources in the integrated renewable energy power generation system, this utility model proposes a comprehensive renewable energy power generation system suitable for nearshore green hydrogen alcohol production. This system optimizes, adjusts, and combines offshore wind power units, offshore photovoltaic units, tidal energy units, energy storage sphere units, AC transmission lines, electro-hydrogen production units, hydrogen storage units, CO2 capture devices, methanol synthesis units, hydrogen pipelines, and CO2 pipelines. This achieves self-peak-shaving energy storage and multi-energy conversion of electricity with hydrogen energy and gravitational potential energy, thereby improving the reliability and stability of power supply in the green hydrogen alcohol production process.

Claims

1. A renewable energy integrated power generation system suitable for nearshore green hydrogen alcohol production, characterized in that, include: Offshore wind power unit, offshore photovoltaic unit, tidal energy unit, energy storage sphere unit, electro-hydrogen production unit, hydrogen storage unit, CO2 capture device, methanol synthesis unit, AC transmission line, hydrogen pipeline, CO2 pipeline; The offshore wind power unit includes several offshore wind turbines, an offshore wind power step-up substation, and related collection lines. The offshore photovoltaic unit includes several offshore photovoltaic arrays, an offshore photovoltaic step-up substation, and related collection lines; The tidal energy unit includes several tidal turbine units, a tidal energy booster substation, and related collection lines; The energy storage sphere unit includes several energy storage spheres, an energy storage sphere substation, and related collection lines; The electro-hydrogen production unit includes a step-down substation and electro-hydrogen production equipment; The hydrogen storage unit includes hydrogen storage equipment and hydrogen supply pipelines; The methanol synthesis unit includes methanol production equipment, methanol storage equipment, and methanol supply pipelines; The AC transmission lines include wind power AC transmission lines, photovoltaic AC transmission lines, tidal energy AC transmission lines, and energy storage sphere AC transmission lines.

2. The renewable energy integrated power generation system for near-shore green hydrogen alcohol production according to claim 1, characterized in that: The system comprises an offshore wind power unit, an offshore photovoltaic unit, a tidal energy unit, and an energy storage sphere unit, which together form a renewable energy integrated power generation system and transmits the electricity to the hydrogen production unit.

3. The renewable energy integrated power generation system for near-shore green hydrogen alcohol production according to claim 1, characterized in that: The near-shore green hydrogen production process consists of an electric hydrogen production unit, a hydrogen storage unit, a CO2 capture device, a methanol synthesis unit, a hydrogen transportation pipeline, and a CO2 transportation pipeline. Its power supply is provided by a renewable energy integrated power generation system consisting of an offshore wind power unit, an offshore photovoltaic unit, a tidal energy unit, and an energy storage sphere unit, all of which are renewable energy power.

4. The integrated renewable energy power generation system according to claim 2, characterized in that: The offshore wind power unit, offshore photovoltaic unit, tidal energy unit, and energy storage sphere unit in the renewable energy integrated power generation system can choose a reasonable power transmission method based on the power demand of the electro-hydrogen production unit: When the power demand of the hydrogen production unit is large, the offshore wind power unit will send wind power through the wind power AC transmission line, the offshore photovoltaic unit will send photovoltaic power through the photovoltaic AC transmission line to the hydrogen production unit, the tidal energy unit will send the power generated by the tidal energy through the tidal energy AC transmission line, and the energy storage ball unit will send the power generated by the energy storage ball through the energy storage ball AC transmission line to the hydrogen production unit. When the power demand of the hydrogen production unit is low, the offshore wind power unit will send wind power through the wind power AC transmission line, the offshore photovoltaic unit through the photovoltaic AC transmission line, and the tidal energy unit through the tidal energy AC transmission line to the hydrogen production unit to meet its power demand. After this, the AC transmission line of the energy storage sphere will be taken out of operation. The surplus offshore wind power will be sent to the energy storage sphere unit through the wind power AC transmission line, the surplus offshore photovoltaic power through the photovoltaic AC transmission line, and the surplus tidal energy through the tidal energy AC transmission line. The surplus power will be used to drive the energy storage sphere unit to pump water to a vacuum state, converting electrical energy into gravitational potential energy, and providing energy storage and peak shaving for the renewable energy integrated power generation system. When only the offshore wind power unit, offshore photovoltaic unit, and tidal energy unit are generating electricity, if the offshore wind power unit and offshore photovoltaic unit are affected by wind and sunshine and their output is low or they stop generating electricity, the wind power AC transmission line, photovoltaic AC transmission line, and tidal energy AC transmission line will stop transmitting power to the energy storage ball unit. The energy storage ball unit will switch from energy storage state to power generation state and transmit the generated power to the hydrogen production unit through the energy storage ball AC transmission line to ensure the power demand of the hydrogen production unit and solve the problem of insufficient power transmission from the offshore wind power unit and offshore photovoltaic unit. When the power supply from the offshore wind power unit, offshore photovoltaic unit, and tidal energy unit can meet the power demand of the electro-hydrogen production unit, the energy storage sphere unit stops generating electricity and enters standby or energy storage mode.

5. The integrated renewable energy power generation system according to claim 3, characterized in that: After hydrogen is produced by the electro-hydrogen production unit, it is supplied to the hydrogen storage unit and the methanol synthesis unit through hydrogen transmission pipelines, and CO2 is supplied to the methanol synthesis unit through the CO2 capture device and CO2 transmission pipelines.

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