Irregular Multilayer Filter Media for High Efficiency and Low Pressure Drop
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Solution Overview
Problem
Existing multilayered media face a challenge in achieving a balance between high efficiency and low resistance to fluid flow, leading to higher pressure drops and reduced flow rates.
Innovation Solution
The development of multilayered media with an irregular structure, comprising layers with undulated configurations and a polymeric film, allowing for reversibly stretchable layers to form peaks during recovery, enhancing surface area and fluid flow efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If filter efficiency is increased, then contaminant trapping capability is improved, but resistance to fluid flow increases leading to higher pressure drops
Solution Approach 1:
The patent applies dimensionality change by transforming flat filter layers into three-dimensional undulated structures with peaks and valleys. This vertical dimensionality increase provides additional filtration surface area within the same footprint, improving contaminant trapping capability without increasing in-plane flow resistance, thereby resolving the contradiction between filter efficiency and pressure drop
Solution Approach 2:
The patent employs curvature by creating undulated layer configurations with peaks and valleys rather than flat surfaces. This curved geometry increases the effective surface area for filtration while maintaining open pathways for fluid flow, allowing high filter efficiency to be achieved without proportionally increasing pressure drop
2Reliability
If surface area is increased to improve filtration, then filter efficiency is improved, but device complexity increases
Solution Approach 1:
The patent uses curvature to create undulated layers with peaks and valleys that increase surface area. This approach achieves the desired filtration surface area through geometric transformation rather than adding multiple separate filtration components, thereby improving filter efficiency while limiting the increase in device complexity
Solution Approach 2:
The patent merges multiple functions into the undulated layer structure itself. The same undulated layers that provide increased surface area for filtration also serve as the structural framework and maintain layer spacing, eliminating the need for additional support structures and reducing overall device complexity despite the increased surface area
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 solution results in a media with increased surface area and reduced fluid flow resistance, achieving high efficiency with minimal pressure drop, suitable for various applications including filtration and energy storage.
Implementation Method 1
the second layer being reversibly stretchable from a stretched configuration to a relaxed configuration, the first layer forming peaks during recovery
Data Source
AI summary
Articles and methods related to multilayered media are generally provided. Some embodiments are generally related to filter media. Some embodiments relate to multilayered media comprising an irregular structure. The irregular structure may be present on an external surface of the multilayered media, in the interior of the multilayered media, and/or throughout the multilayered media. Some aspects are generally related to multilayered media that are reversibly stretchable and/or comprising a polymeric film.