Fuel Cell Depurant Container U-Shape Flow Segmentation
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Solution Overview
Problem
Existing desulfurizer designs for fuel cell systems face challenges in manufacturing high-sealing performance due to complex structures and potential leaks, which can lead to inadequate fuel purification and system reliability issues.
Innovation Solution
A depurant container device with an intermediate plate member and fluid passage forming members that change the fluid flow direction in a U-shape, featuring exposed joining portions for easy inspection and assembly, ensuring high sealing performance through visible inspection or soap coating methods, and retaining members to prevent floating and clogging of the depurant.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an intermediate plate member with U-shaped flow direction changing structure is used inside the container, then fuel flow stream is controlled and desulfurization effectiveness is improved, but manufacturing complexity increases and sealing performance at joining portions deteriorates
Solution Approach 1:
The desulfurizer is divided into multiple components: container, intermediate plate member, and fluid passage forming members. This segmentation allows each component to be manufactured separately with simpler processes, then assembled together. The intermediate plate member can be a simple plate without complex U-shaped structures, while the flow direction changing function is achieved through the assembly of multiple fluid passage forming members.
Solution Approach 2:
The intermediate plate member serves as an intermediary component that simplifies the overall structure. Instead of creating complex U-shaped flow paths within a single container wall, the intermediate plate acts as a mediator that guides fuel flow between inlet and outlet ports, allowing each component to have a simpler, easier-to-manufacture geometry.
2Reliability
If complex structures with intermediate plate member are used to control fuel flow, then desulfurization performance is improved, but sealing performance at joining portions deteriorates due to manufacturing difficulties
Solution Approach 1:
By segmenting the structure into separate container, intermediate plate member, and fluid passage forming members, each component can be manufactured with standard precision. The joining portions between these segmented components use conventional sealing methods (welding, brazing, or gaskets) that are well-established and reliable, avoiding the need for complex integrated sealing structures.
Solution Approach 2:
The joining portions use homogeneous sealing methods throughout the structure - either all welding, all brazing, or all gasket sealing - rather than requiring different precision levels at different locations. This uniform approach to joining simplifies quality control and ensures consistent sealing performance across all connections.
3Reliability
If intermediate plate member is used to change flow direction, then fuel gas purification is improved, but risk of fuel gas leakage via joining portions increases
Solution Approach 1:
The design anticipates potential sealing failures by using multiple joining portions with standardized sealing methods. Each joining portion is designed with appropriate tolerances and sealing features (weld seams, brazing joints, or gasket interfaces) that provide redundant sealing paths. This beforehand cushioning ensures that even if one joining portion has minor defects, the overall system maintains sealing integrity and prevents fuel gas leakage.
4Ease of manufacture
If simple container structure is used, then manufacturing ease is improved, but fuel flow control and desulfurization effectiveness deteriorate
Solution Approach 1:
The container structure is segmented into simple components (container body, intermediate plate, fluid passage forming members) that are easy to manufacture individually. The desulfurization effectiveness is achieved not through complex individual components, but through the coordinated arrangement of these simple segments, which collectively create the necessary flow control and purification functions.
Solution Approach 2:
Multiple simple functions are merged into the assembly: the container provides structural housing, the intermediate plate provides flow guidance, and the fluid passage forming members provide catalytic contact surfaces. By merging these simple components into a integrated assembly, the system achieves effective fuel flow control and desulfurization without requiring any single component to be complex.
Data Source
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AI summary
A depurant container device for a fuel cell system, which includes an intermediate plate member (200) including a first surface and a second surface provided at opposite sides, and an opening for flowing the fluid in a U-shape between the inlet port and the outlet port, a first fluid passage forming member (300) forming a first fluid passage (305) through which the fluid flows, and a second fluid passage forming member (400) forming a second fluid passage (405) which is in communication with the first fluid passage via the opening. The first fluid passage forming member contacts the first surface of the intermediate plate to be joined thereto by a joining portion (701, 702, 703, 704, 721,723, 901, 902), and the second fluid passage forming member contacts the second surface of the intermediate plate to be joined thereto by the joining portion so that the depurant container device is sealed.