Electrolyzer Cell Integrated Degassing Cavities
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Solution Overview
Problem
Existing water electrolysis installations require bulky and energy-intensive gas/liquid separators, leading to high capital and operational expenditures.
Innovation Solution
The water electrolyzer cell design incorporates anodic and cathodic degassing cavities with porous separation substrates, allowing for efficient gas/liquid separation within the cell, reducing the need for large external separators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external gas/liquid separators are used to separate hydrogen and oxygen from the electrolyte, then gas/liquid separation is achieved, but the installation requires bulky separators which increase capital expenditures and operational costs
Solution Approach 1:
The patent combines the gas/liquid separation function with the electrolyzer cell structure by integrating degassing cavities directly into the cell housing. This merging eliminates the need for separate external separators, reducing both capital expenditures and operational costs while maintaining separation efficiency.
Solution Approach 2:
The degassing cavities are nested within the electrolyzer cell structure, with the anodic degassing cavity integrated into the anodic compartment and the cathodic degassing cavity integrated into the cathodic compartment. This nesting approach allows the separation function to be embedded within the existing cell architecture without requiring additional external space.
2Reliability
If large external gas/liquid separators are deployed, then complete gas/liquid separation is achieved, but energy consumption increases due to the size and operation requirements of these separators
Solution Approach 1:
By merging the separation function into the cell structure itself, the system eliminates the need for energy-intensive external separator operations. The integrated degassing cavities utilize the natural buoyancy and flow dynamics within the cell, requiring minimal additional energy input compared to large external separators.
Solution Approach 2:
The degassing cavities are designed to perform separation automatically using the inherent properties of gas-liquid mixtures (buoyancy, density differences) without requiring external energy input for operation. The structure enables self-service separation where the gas rises and accumulates in the cavities naturally during normal cell operation.
3Device complexity
If traditional electrolyzer cell design without integrated degassing cavities is used, then cell structure is simpler, but bulky external separators must be provided increasing both capital and operational expenditures
Solution Approach 1:
The patent merges multiple functions (electrolysis and gas/liquid separation) into a single integrated cell structure. While this slightly increases cell structure complexity, it eliminates the need for separate external separators, thereby reducing overall installation costs and improving ease of manufacture at the system level.
Solution Approach 2:
The electrolyzer cell is designed with multi-functionality, where the cell housing simultaneously serves as the electrolysis chamber and the gas/liquid separation system through the integrated degassing cavities. This universal design reduces the total number of components needed, lowering capital expenditures despite the enhanced cell structure.
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
This design significantly reduces the size and energy consumption of gas/liquid separators, lowering investment and operational costs while maintaining efficient water electrolysis reactions.
Implementation Method 1
the cell casing comprising a porous separation substrate positioned in the anodic degassing cavity and/or in the cathodic degassing cavity
Implementation Method 2
the porous separation substrate comprising at least a layer of porous particles or/and at least a porous self-supporting structure as a coalesce
Data Source
Figure 1
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AI summary
The cell (26) comprises a cell casing (34) defining an anodic compartment (36) and a cathodic compartment (38), the anodic compartment (36) comprising an anode chamber (50) and the cathodic compartment (38) comprising a cathode chamber (58), the cell casing (34) comprising a membrane (40) separating the anode chamber (50) from the cathode chamber (58). The anodic compartment (36) defines, within the cell casing (34), an anodic degassing cavity (52) located on top of the anode chamber (50), the cathodic compartment (38) defining, within the cell casing (34), an cathodic degassing cavity (60) located on top of the cathode chamber (58). The cell casing (34) comprises a partition wall (42) tightly separating the anodic degassing cavity (52) from the cathodic degassing cavity (60).