Filter Assembly Vertex Diffusion Pressure Drop
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Solution Overview
Problem
Existing filter assemblies for fluids, such as fuel gases, face a challenge in maximizing filtering efficiency while minimizing pressure drop, as the filter element causes a significant pressure drop due to friction, which restricts flow and reduces filtering capacity.
Innovation Solution
The filter assembly incorporates a vertex that diffuses the fluid flow across a greater area of the filter element, reducing pressure drop by distributing velocity more evenly and increasing the surface area exposed to the fluid, thereby enhancing filtering capacity and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter element is used to filter impurities from fluid, then filtering efficiency is improved, but pressure drop increases and flow rate decreases
Solution Approach 1:
The filter element is segmented into multiple legs (at least three legs) that are spaced apart and extend across the flow path. This segmentation allows fluid to flow through multiple parallel paths around the legs, distributing the flow and reducing the velocity through any single filtration surface, thereby reducing pressure drop while maintaining total filtering capacity.
Solution Approach 2:
The filter element extends in multiple spatial dimensions with legs spaced apart from each other, creating a three-dimensional filtration structure. This dimensional arrangement increases the surface area exposed to fluid flow and creates multiple flow paths, reducing the velocity through the filtration medium and minimizing pressure drop.
2Reliability
If filter element surface area is increased to maximize filtering capacity, then filtering efficiency is improved, but velocity distribution becomes uneven and pressure drop increases
Solution Approach 1:
The filter element is divided into multiple legs spaced apart, which segments the filtration surface area into distinct zones. This segmentation distributes the fluid flow across multiple separated filtration surfaces, preventing concentration of velocity at any single point and reducing the maximum velocity through the filtration medium, thereby reducing pressure drop.
Solution Approach 2:
The spaced-apart legs create different local flow zones with varying velocity distributions. Fluid flows through the spaces between the legs as well as through the filtration surfaces, creating a more uniform velocity distribution across the entire filtration assembly. This local quality variation prevents high-velocity concentration points that would otherwise cause excessive pressure drop.
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
This configuration decreases the maximum velocity of fluid through the filter element, resulting in a lower pressure drop and increased flow rate, while maintaining or improving filtering efficiency.
Implementation Method 1
The filter assembly is used, for example, to filter particulates to protect controls, such as regulators, automatic shut-off valves, etc., from particulate contamination
Implementation Method 2
The filter includes a vertex extending transversely to the flow path for diffusing the flow of fluid and increasing the surface area of the filter
Implementation Method 3
The pressure drop is a decrease in pressure from the inlet to the outlet due to friction as the fluid flows through the housing, and in particular, due in part to friction between the flowing fluid and the filter element
Data Source
AI summary
A filter assembly includes a housing defining a cavity with an inlet and an outlet in communication with the cavity and establishing a flow path from the inlet to the outlet. A filter is disposed in the cavity between the inlet and the outlet. The filter includes a vertex extending transversely to the flow path for diffusing the flow of fluid and increasing the surface area of the filter. The filter includes a pair of legs spaced from each other and each extending across the flow path from the vertex to the housing. The legs extend transversely to each other at the vertex with one of the legs extending along a first arcuate path from the vertex to the housing and the other of the legs extending along a second arcuate path different than the first arcuate path from the vertex to the housing.