Electrochemical Stack Manifold Layout for Lower Connection Pressure Loss
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Solution Overview
Problem
Existing electrochemical devices face challenges in achieving a large volume flow of fluid medium through connecting channels, leading to pressure losses and limitations in design flexibility.
Innovation Solution
The design of connecting channels with offset edges between flow field and medium channel orifices, enlarged flow field-side openings, and optional support elements, allowing for a wider flow area and reduced pressure loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the connecting channel has a standard design with aligned orifices, then the structure is simple and easy to manufacture, but the fluid passage area is limited and pressure loss increases
Solution Approach 1:
The patent applies asymmetry by offsetting the flow field-side orifice relative to the medium channel-side orifice in the connecting channel. This asymmetric arrangement enlarges the flow field-side opening area, creating a larger fluid passage area that reduces pressure loss while maintaining manufacturability through a straightforward offset design
2Loss of energy
If the flow field-side orifice is enlarged to increase fluid passage area, then pressure loss is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by selectively enlarging only the flow field-side opening area while keeping the medium channel-side orifice dimensions standard. This localized modification reduces pressure loss in the critical flow field region without requiring high-precision manufacturing across the entire connecting channel structure
3Adaptability or versatility
If offset edges are implemented in the connecting channel, then design freedom is enhanced and flow area is widened, but the device complexity increases
Solution Approach 1:
The patent implements a single offset between the flow field-side and medium channel-side orifices, providing enhanced design freedom for optimizing flow area without creating complex multi-offset structures. This simple asymmetric design avoids excessive complexity while achieving the desired versatility in flow field configuration
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
Ensures a sufficiently large flow-through cross-section across the connecting channel, reducing pressure loss and enhancing design freedom while maintaining a fluid-tight seal.
Implementation Method 1
at least one connecting channel through which the flow field and the medium channel are in fluid communication with one another
Data Source
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AI summary
To create an electrochemical device, comprising a stack of a plurality of electrochemical units (106), at least one medium channel (118), which extends along a stack direction (104), at least one flow field (120), through which a medium can flow transverse to the stack direction from the medium channel to another medium channel, and at least one connection channel (128, 138), by means of which the flow field (120) and medium channel (118) are fluidically connected to one another, wherein the connection channel (128, 138) has a medium channel-side mouth opening (176), which extends in a circumferential direction (178) of the flow field (120) from a first medium channel-side edge (180) to a second medium channel-side edge (182), and a flow field-side mouth opening (184), which extends in the circumferential direction (178) from a first flow field-side edge (186) to a second flow field-side edge (188), in which device a large volume flow of the fluid medium through the connection channel can be achieved, the invention proposes that at least one of the flow field-side edges is offset away from the other flow field-side edge with respect to one of the medium channel-side edges in the circumferential direction.