Porous-Support Layer Assembly for Flow and Pressure Stability
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Solution Overview
Problem
Existing devices for filtration, chemical, and electrochemical processes, such as PEM electrolyzers, face challenges in optimizing current flow, reactant flow, and resistance to pressure differentials, while also being economically produced.
Innovation Solution
A process for producing a device with a porous layer and a supporting layer, where the supporting layer has channels open towards the porous layer, achieved by providing a stack of a green porous layer and a green supporting layer, applying the supporting layer using additive manufacturing, sintering, and thermally bonding the stack.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional manufacturing methods are used for supporting layers, then production is simpler, but manufacturing precision and mechanical stability are insufficient
Solution Approach 1:
The supporting layer is manufactured in advance using additive manufacturing technology to achieve precise geometric structures and controlled porosity. The green part is prepared with exact dimensions and channel configurations before being integrated with the porous layer, ensuring high manufacturing precision while maintaining production efficiency through automated processes.
2Strength
If the supporting layer is made more dense to withstand pressure, then mechanical strength improves, but reactant flow and current distribution are reduced
Solution Approach 1:
The supporting layer is designed with spatially varying porosity and density characteristics. Regions requiring high mechanical strength have higher density, while regions requiring efficient reactant flow and current distribution have optimized porosity. This local quality variation allows the supporting layer to simultaneously withstand pressure differentials and maintain high productivity in electrochemical processes.
3Productivity
If the porous layer is made thinner to increase cell density, then productivity improves, but mechanical stability and current flow are compromised
Solution Approach 1:
The device employs a composite structure combining the porous layer with the additively manufactured supporting layer. The supporting layer, made from sinterable material powder with controlled porosity (30-70%), provides enhanced mechanical stability and current distribution pathways. This composite configuration allows the porous layer to be thinner while maintaining overall structural reliability and electrochemical performance.
4Manufacturing precision
If additive manufacturing is used for the supporting layer, then manufacturing precision and mechanical stability improve, but production time and process complexity increase
Solution Approach 1:
The supporting layer is manufactured in advance using additive manufacturing technology to achieve precise geometric structures and controlled porosity. The green part is prepared with exact dimensions and channel configurations before being integrated with the porous layer, ensuring high manufacturing precision while maintaining production efficiency through automated processes.
Solution Approach 2:
The supporting layer and porous layer are integrated into a single unified structure through thermal bonding. This merging of components eliminates separate assembly steps, reduces overall production time, and ensures optimal mechanical and electrical contact between layers while maintaining the precision benefits of additive manufacturing.
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
The resulting device exhibits improved mechanical stability, efficient reactant and product flow, and optimized current distribution, while being economically viable due to the additive manufacturing process.
Implementation Method 1
applying the green part of the supporting layer on the porous layer or the green part of the porous layer by additive manufacturing from a sinterable material powder and a binder in a layer-by-layer wise manner
Implementation Method 2
sintering the green parts, wherein a sintered structure is formed having joints between the porous layer and the supporting layer
Implementation Method 3
thermally bonding the stack
Data Source
AI summary
A process for producing a device for use in filtration, chemical processes or electrochemical processes is described, the device comprising a porous layer and a supporting layer comprising channels running in the plane of the supporting layer and being open towards the porous layer. The process comprises providing a stack comprising a) the porous layer, or a green part of the porous layer which green part contains a sinterable material powder and a binder, or a partially debound green part of the porous layer, and b) a green part of the supporting layer. The process further comprises the green part of the supporting layer being applied on the porous layer or the green part of the porous layer or the partially debound green part of the porous layer by additive manufacturing from a sinterable material powder and a binder in a layer-by-layer wise manner; sintering the green parts; and thermally bonding the stack. The process allows for producing devices having a structure that is optimized with regard to current flow, reactant flow and resistance to pressure differentials, and for producing the devices in an economical way.