Composite Electrolyser Framing for Corrosion and Pressure Resistance
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Solution Overview
Problem
Existing high-pressure electrolysers face issues with corrosion of carbon or stainless steel frames, leading to performance degradation and increased costs, dimensions, and weight due to the use of engineering plastics that lack mechanical strength.
Innovation Solution
A framing structure comprising separate containment and support structures, where the containment structures are made of robust materials like steel and the support structures are made of corrosion-resistant plastics, with a segmented design to distribute mechanical stress effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If carbon steel or stainless steel is used for the cell frame, then mechanical resistance is improved, but corrosion resistance deteriorates
Solution Approach 1:
The invention uses a composite structure combining steel containment structures with plastic support structures. The steel provides mechanical strength while the plastic provides corrosion resistance, resolving the contradiction between mechanical resistance and corrosion resistance by integrating materials with complementary properties.
2Reliability
If engineering plastic is used for the cell frame, then corrosion resistance is improved, but mechanical strength deteriorates
Solution Approach 1:
The composite structure combines plastic support structures (corrosion-resistant) with steel containment structures (mechanically strong). This allows the plastic to contact the electrolyte while the steel provides the necessary mechanical strength to withstand high pressure, resolving the contradiction between corrosion resistance and mechanical strength.
Solution Approach 2:
Different parts of the cell frame are made from different materials suited to their specific functions: plastic for parts contacting electrolyte (corrosion resistance) and steel for load-bearing containment (mechanical strength). This local differentiation resolves the contradiction by optimizing material properties for specific functional requirements.
3Reliability
If engineering plastic is used for large high-pressure electrolysers, then corrosion resistance is maintained, but dimensions and weight increase
Solution Approach 1:
The steel containment structures provide high strength-to-weight ratio, allowing thinner walls compared to pure plastic designs. This reduces the overall weight and dimensions while maintaining both corrosion resistance (plastic) and mechanical strength (steel) for large high-pressure electrolysers.
Data Source
AI summary
The present invention relates to a framing structure for an electrolyser subject to internal pressure, able to withstand corrosive environments and radial pressure forces. The present invention also relates to an electrolytic cell and electrolyser equipped with said framing structure, as well as its use in high-pressure water electrolysis applications.