Fuel Distributor Assembly with Helical Apertures
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Solution Overview
Problem
Existing fuel cell stacks face challenges in efficiently distributing fuel to each fuel cell, which affects the overall electrical power generation efficiency.
Innovation Solution
A fuel distributor assembly with a curved outer shell and an inner shell featuring ribs and apertures in a partial helical pattern, creating flow channels to efficiently deliver fuel to the fuel cells, is introduced. The assembly includes a method of extrusion molding and injection molding to form the shells and ribs, ensuring precise fuel distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional fuel distribution system is used in fuel cell stacks, then the structure is simple, but the fuel distribution efficiency is poor
Solution Approach 1:
The fuel distributor is divided into an outer shell and an inner shell with multiple separate components (ribs, lips, apertures) that work together to create flow channels. This segmentation allows for optimized fuel distribution pathways while maintaining manufacturability through separate molding of components.
Solution Approach 2:
The inner shell features a curved surface with ribs that extend around it, creating a helical flow pattern for fuel distribution. The curved geometry promotes uniform fuel flow across multiple fuel cells, improving distribution efficiency compared to straight linear channels.
2Productivity
If fuel is distributed to multiple fuel cells simultaneously, then the power generation efficiency improves, but the manufacturing precision requirements increase
Solution Approach 1:
The inner shell has apertures positioned at specific locations along its length in a helical pattern, with each aperture serving a specific fuel cell. The ribs are positioned to create localized flow channels that deliver fuel precisely to each fuel cell's required location, ensuring uniform distribution while maintaining manufacturing feasibility.
3Stability of the object's composition
If a multi-component fuel distributor assembly is used, then the fuel distribution uniformity improves, but the assembly complexity increases
Solution Approach 1:
The inner shell is positioned within the outer shell, with ribs extending from the inner shell to contact the outer shell's inner wall surface. This nested configuration creates the flow channels and structural support in a compact arrangement that improves fuel distribution uniformity while minimizing the overall assembly footprint.
Data Source
AI summary
A fuel distributor assembly for a fuel cell stack that includes an inner shell positioned within an outer shell. The outer shell is curved to define a central longitudinal chamber, a first longitudinal edge and a second longitudinal edge. The outer shell also has an inner wall surface and an outer wall surface. The first longitudinal edge and the second longitudinal edge in combination define a longitudinal slot. The first longitudinal edge is bent inwardly towards the longitudinal chamber to form a longitudinal lip. The inner shell includes a plurality of ribs extending outwardly and contacting the inner wall surface of the outer shell. The inner shell, the outer shell, the lip, and the ribs define a plurality of flow channels. The inner shell has a length along which a plurality of apertures are positioned in a partial helical pattern. A method of forming the fuel distributor is also provided.