Nested Meandering Flow Element for Uniform Fluid Distribution
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Solution Overview
Problem
Existing flow elements fail to distribute fluid uniformly over a surface, particularly in electrochemical devices, leading to inefficient fuel and oxidizer supply and exhaust gas removal.
Innovation Solution
A flow element with a plate-like main body featuring a channel structure comprising multiple meandering segments nested in each other, which connect the inlet and outlet sides, allowing for uniform fluid distribution by varying channel path lengths and rib widths to optimize fluid flow and pressure transfer between channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional channel structures are used, then the device complexity is low, but the fluid distribution uniformity is poor
Solution Approach 1:
The patent applies nesting by placing meandering segments of different channel paths within each other's spatial envelope. Specifically, meandering segments of channel paths are arranged such that they are nested in each other, allowing multiple channel paths to share the same footprint area while maintaining distinct flow routes. This resolves the contradiction by achieving uniform fluid distribution through complex nested meandering patterns without proportionally increasing the overall device footprint or manufacturing complexity.
Solution Approach 2:
The patent transitions from simple linear or basic meandering channel paths to multi-dimensional nested meandering segments. By arranging meandering segments in a nested configuration across multiple dimensions within the plate-like main body, the channel structure achieves superior fluid distribution uniformity. This dimensional arrangement allows the fluid to be guided uniformly across the surface while managing the complexity through systematic spatial organization rather than random complex routing.
2Adaptability or versatility
If meandering segments are placed next to each other, then the channel paths can be moved away from each other in multiple directions, but the theoretical separation is limited to a single direction in nested arrangements
Solution Approach 1:
The patent resolves this contradiction by nesting meandering segments of different channel paths within each other's spatial boundaries. This nesting arrangement provides theoretical separation in a single primary direction while maintaining adaptability through the nested configuration. The meandering segments are designed to interlock spatially, allowing the channel paths to be separated contactlessly in multiple directions through systematic displacement of the nested segments, thus achieving both flexibility and manageable complexity.
3Productivity
If channel paths have varying lengths and rib widths, then fluid flow and pressure transfer are optimized, but the manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by varying rib widths and channel path lengths at specific locations within the flow element. Different regions of the plate-like main body have differently dimensioned ribs and channel segments optimized for their local flow requirements. This localized variation optimizes fluid flow efficiency and pressure transfer in each region while the overall nested meandering pattern provides a systematic framework that manages manufacturing precision requirements through repeatable modular segments rather than entirely unique dimensions throughout.
Solution Approach 2:
The patent implements parameter changes by systematically varying rib widths and channel path lengths within the nested meandering structure. These parameter variations are introduced to optimize fluid flow characteristics and pressure distribution across different regions. The changes are managed through the nested meandering pattern, which provides a consistent geometric framework that accommodates parameter variations while maintaining manufacturability and controlling dimensional tolerance requirements.
Data Source
AI summary
In order to provide a flow element by means of which a fluid can be guided and/or distributed over a surface as uniformly as possible, it is proposed that the flow element comprises a plate-like main body, which has a channel structure, wherein the channel structure comprises two or more paths, which connect an inlet side of the channel structure to an outlet side of the channel structure, wherein the two or more channel paths each have one or more meandering segments, wherein meandering segments of channel paths different from each other are nested in each other.