Common-Housing Anode Delivery Unit for Leak and Ice Loss Control
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Solution Overview
Problem
Existing fuel cell delivery units for vehicles with fuel cell drives face inefficiencies due to complex fluidic connections, leading to flow losses, leak-tightness issues, and rapid cooling, which reduces reliability and service life, and results in poor cold-start characteristics.
Innovation Solution
A delivery unit with a recirculation blower, jet pump, and dosing valve integrated within a common housing, minimizing flow diversions and external pipelines, utilizing the centrifugal principle for separating heavy constituents, and leveraging heat generation for reduced cooling and improved cold-start capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If components (recirculation blower, jet pump, dosing valve) are connected by pipelines and arranged as separate assemblies, then the delivery unit can be assembled and maintained more easily, but flow losses increase, leak-tightness problems occur, and rapid cooling leads to ice bridge formation
Solution Approach 1:
The patent integrates the recirculation blower, jet pump, and dosing valve into a single common housing with internally connected flow channels. This merging eliminates external pipelines between components, preventing leak-tightness issues and reducing flow losses while maintaining ease of assembly as a single unit.
2Ease of manufacture
If components are arranged as separate assemblies connected by pipelines, then individual components can be manufactured independently, but the overall surface area increases leading to rapid cooling and ice bridge formation
Solution Approach 1:
By combining multiple components into a single common housing, the patent reduces the overall external surface area exposed to cold environments. This minimizes heat loss and prevents rapid cooling that would lead to ice bridge formation, while the internal flow channels maintain functional independence of each component.
3Volume of moving object
If components are positioned at a distance from one another with external pipelines, then the delivery unit occupies more space allowing for better heat dissipation, but flow diversions increase reducing efficiency
Solution Approach 1:
The patent arranges components in a compact three-dimensional configuration within the common housing, with flow channels optimized to minimize path length and diversions. This spatial optimization maintains delivery efficiency while reducing the overall volume occupied by the delivery unit.
4Ease of manufacture
If external pipelines are used to connect components, then the delivery unit can be assembled from pre-manufactured parts, but the number of flow diversions and flow losses increases
Solution Approach 1:
The patent integrates flow channels directly into the common housing structure, eliminating external pipelines. This reduces the number of connections and flow diversions, minimizing energy losses while the modular internal design allows for efficient manufacturing and assembly.
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 reduces flow and friction losses, minimizes the risk of leaks, prevents ice bridge formation, enhances efficiency, and extends the service life of the fuel cell system by maintaining hydrogen flow efficiency and reducing the need for additional heating, thus improving the overall reliability and cold-start performance.
Implementation Method 1
the flow contours of the components for the gaseous medium and/or the components recirculation blower, jet pump and dosing valve are arranged at least approximately entirely in a common housing
Implementation Method 2
having a recirculation blower and having a jet pump which is driven by a motive jet of a pressurized gaseous medium
Implementation Method 3
there is the disadvantage that, overall, these form a large surface area in relation to the structural space and/or geometrical volume. This promotes rapid cooling of the components recirculation blower and/or jet pump and/or dosing valve
Data Source
AI summary
Disclosed is a delivery unit (3) for an anode circuit (9) of a fuel cell system (1) for delivering a gaseous medium, in particular hydrogen, from an anode region (38) of a fuel cell (2), said delivery unit (3) comprising at least one jet pump (4) and being at least indirectly fluidically connected to the outlet of the anode region (38) by means of at least one connection line (23, 25) and being fluidically connected to the inlet of the anode region (38) by means of an additional connection line (27). According to the invention, in addition to the jet pump (4), the delivery unit (3) comprises a recirculation fan (8) and a metering valve (6) as other components, and the flow contours of the components (4, 6, 8) for the gaseous medium and/or the components (4, 6, 8) are at least almost entirely arranged in a common housing (7).