Electrolyzer Pan Assembly Layout for Stable High-Current Flow
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Solution Overview
Problem
Current hydrogen production methods, particularly those using fossil fuels, are expensive and environmentally damaging, necessitating a cost-effective and environmentally friendly hydrogen gas producing electrolysis system.
Innovation Solution
The development of anode and cathode pan assembly configurations with unique manifold, outlet tube, and baffle plate designs for electrochemical cells, enabling high current density operations in ion exchange membrane water electrolysis, which includes a manifold with a cross-sectional area between 0.25-0.75 of the pan depth, ribs with notches, and a baffle plate with slots fitting over the notches, to manage high flow rates and prevent slug or plug flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional electrolysis systems are used, then hydrogen production is achieved, but capital expenses are high and production efficiency is low
Solution Approach 1:
The patent changes the operating parameter of current density to high levels (500-2000 mA/cm²) and optimizes the manifold cross-sectional area ratio (0.25-0.75 of pan depth) to enable fewer cells to achieve the same production rate, thereby improving productivity while reducing device complexity
Solution Approach 2:
The patent introduces a baffle plate with slots that fits over ribs with notches, creating a new spatial dimension for flow control within the cell. This dimensional addition prevents slug flow and improves current distribution, enabling higher current density operation with fewer cells
2Productivity
If high current density operation is implemented, then production rate increases, but slug flow and pressure fluctuations occur
Solution Approach 1:
The baffle plate is segmented into multiple slots that fit over notched ribs, dividing the flow path into multiple channels. This segmentation prevents slug flow by distributing the flow more evenly across the cell, maintaining reliability at high current densities
Solution Approach 2:
The baffle plate acts as an intermediary element between the electrolyte inlet and outlet, mediating the flow to prevent direct slug flow paths. The plate with its slot configuration stabilizes pressure fluctuations while allowing high current density operation
3Reliability
If high flow rates are used to prevent slug flow, then flow stability improves, but membrane erosion increases
Solution Approach 1:
By segmenting the flow through the baffle plate slots, the patent reduces the velocity and impact force of the electrolyte on the membrane while still preventing slug flow. This allows flow stability without excessive flow rates that would cause erosion
Solution Approach 2:
The patent converts the potential harm of high flow rates into a benefit by using the baffle plate to distribute the flow. The flow rate is maintained high enough to prevent slug flow but distributed evenly to avoid localized erosion, turning a harmful factor into a controlled beneficial flow
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
These configurations allow for efficient hydrogen gas production at high current densities, reducing capital expenses and preventing membrane erosion, pressure fluctuations, and heat buildup, while ensuring effective gas and liquid flow, thus making electrolysis a viable hydrogen production method.
Implementation Method 1
Electrolysis consists of using electricity to split water into hydrogen and oxygen
Data Source
AI summary
Provided herein are anode and/or cathode pan assemblies comprising unique manifold, outlet tube, and/or baffle plate configurations; electrochemical cell and/or electrolyzer containing the anode and/or the cathode pan assemblies; and methods to use and manufacture the same.