Method and device for manufacturing liquid hydrogen by offshore off-grid superconducting wind turbine
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Solution Overview
Problem
Offshore wind farms face challenges with capacity expansion, electric energy storage, transmission, and grid connection due to high costs and instability, particularly with deep-sea installations and submarine cables.
Innovation Solution
A method and device utilizing an offshore superconducting wind turbine to electrolyze seawater, liquefy hydrogen, and use it as a refrigerant to cool the turbine, while storing and transporting liquid hydrogen back to shore, thereby addressing capacity expansion and energy storage/transmission issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the unit capacity of wind turbine generator is increased to reduce transportation and hoisting costs, then the cost of single-machine transportation is reduced, but the volume and weight of the generator increase
Solution Approach 1:
The patent applies parameter changes by transitioning from traditional copper-wound generators to superconducting generators, fundamentally changing the electrical conductivity parameter. This enables higher power density, allowing the generator to produce the same or higher power output with significantly reduced volume and weight, thus solving the contradiction between transportation cost reduction and weight increase
Solution Approach 2:
The patent employs composite materials by combining superconducting materials with appropriate structural materials to create a generator that achieves both high power density and reduced weight. The superconducting composite structure enables the generator to maintain mechanical strength while minimizing mass, addressing the transportation versus weight contradiction
2Reliability
If offshore wind farms are connected to the grid via submarine cables, then electric energy can be transmitted to shore, but the cost and stability issues arise
Solution Approach 1:
The patent extracts the wind energy conversion system from the traditional grid-connected model and creates an independent off-grid system. By taking out the submarine cable connection and instead producing liquid hydrogen directly at the offshore platform, the system eliminates the need for expensive and unstable submarine cable infrastructure while maintaining reliable energy delivery to shore through hydrogen transportation
Solution Approach 2:
The patent introduces liquid hydrogen as an intermediary medium between the offshore wind energy source and the onshore energy demand. Instead of directly transmitting electrical energy through submarine cables, the system converts wind energy to hydrogen, which then serves as a stable, transportable energy carrier to shore, resolving the contradiction between grid connection stability and cable cost
3Reliability
If battery energy storage systems are used to match wind power generation with demand, then energy storage is achieved, but the cost and complexity increase
Solution Approach 1:
The patent utilizes phase transitions in the form of hydrogen liquefaction. By converting gaseous hydrogen produced from electrolysis into liquid hydrogen, the system achieves compact, dense energy storage that can be easily transported. This phase change approach provides a simpler, more cost-effective storage solution compared to battery systems, addressing the contradiction between storage capability and system complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Solves the capacity expansion problem of offshore wind turbines and simultaneously addresses electric energy storage and grid connection issues at a lower cost by converting wind energy into liquid hydrogen for transportation.
Implementation Method 1
offshore off-grid superconducting wind turbine generator
Implementation Method 2
electrolyzing seawater to obtain hydrogen
Implementation Method 3
liquefying the hydrogen into prepared liquid hydrogen
Implementation Method 4
outputting a part of the liquid hydrogen as the refrigerant of the offshore off-grid superconducting wind turbine generator
Data Source
AI summary
Disclosed are a method and a device for manufacturing liquid hydrogen by offshore off-grid superconducting wind turbine. The method comprises the following steps: electrolyzing seawater to obtain hydrogen based on electric energy output by an offshore off-grid superconducting wind turbine generator, liquefying the hydrogen into prepared liquid hydrogen, and outputting a part of the liquid hydrogen as the refrigerant of the offshore off-grid superconducting wind turbine generator. The device comprises a liquid preparation platform, an offshore off-grid superconducting wind turbine generator, a seawater electrolysis unit, a hydrogen liquefaction unit and a liquid hydrogen storage unit, wherein the power ends of the seawater electrolysis unit and the hydrogen liquefaction unit are connected with the output end of the offshore off-grid superconducting wind turbine generator, and the hydrogen liquefaction unit is connected with the coolant input end of the offshore off-grid superconducting wind turbine generator.