One-Stage Water Separator Layout for Compact Fuel Cell Packaging
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Solution Overview
Problem
One-stage water separator devices in fuel cell vehicles need to be adapted to different fuel cell system sizes and installation spaces while maintaining consistent water separation performance.
Innovation Solution
The design of the water separator device includes an axial extension of the immersion tube portion and a modified water-laden volume flow inlet channel to optimize space usage and flow direction, combined with features like a deflector projection and swirl generator to enhance water separation performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the water separator device is adapted to different fuel cell system sizes and installation spaces, then the device can be installed in various applications, but the water separation performance may vary and become inconsistent
Solution Approach 1:
The patent applies parameter changes by making the immersion tube length a variable parameter that can be adjusted according to the specific installation space and fuel cell system size. This allows the water separator device to adapt to different applications while maintaining consistent water separation performance, as the optimized immersion tube length ensures proper flow diversion and separation efficiency in each specific configuration
2Reliability
If the immersion tube length is optimized to correspond to the transition area between chambers, then flow diversion and separation performance are improved, but the device complexity increases
Solution Approach 1:
The patent applies local quality by optimizing the immersion tube length to specifically correspond to the transition area between the water separation chamber and water collection chamber. This localized optimization ensures proper flow diversion and separation performance at the critical interface between chambers, while the rest of the device structure remains relatively simple and straightforward
3Volume of moving object
If the inlet channel diameter is reduced to minimize installation space, then the device size is reduced, but the flow velocity increases and may affect separation performance
Solution Approach 1:
The patent applies dynamics by designing the inlet channel with a variable cross-sectional area that changes along the flow direction. The inlet channel diameter is reduced at the entrance to minimize device size, but the channel area increases toward the water separation chamber. This dynamic variation in channel geometry allows the device to maintain a compact size while controlling flow velocity to ensure proper water separation performance
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 optimized design increases water separation performance while minimizing installation space, reducing flow velocity, and minimizing re-entrainment of water droplets, thus improving overall efficiency.
Implementation Method 1
Inside the water separation chamber the water droplets in the water-laden volume flow adhere to the inner wall of the water separation chamber. During this adhesion process water droplets of different sizes merge with each other.
Implementation Method 2
The so-formed larger water droplets are heavier and thus subjected to larger gravitational pull. Said gravitational pull acts in a direction towards the water collection chamber.
Data Source
AI summary
A one-stage water separator device comprises a water separator housing comprising a water separation chamber and a water collection chamber, a water-laden volume flow inlet port defining a water-laden volume flow inlet channel for channeling a water-laden volume flow into the water separation chamber, a water volume flow outlet port defining a water volume flow outlet channel for channeling a water volume flow out of the water collection chamber, a water-unladen volume flow outlet port defining a water-unladen volume flow outlet channel for channeling a water-unladen volume flow out of the water separation chamber, and an immersion tube comprising an immersion tube portion immersed in the water separation chamber and for fluidically connecting the water-unladen volume flow outlet port with the water separation chamber, an axial extension of the immersion tube portion essentially corresponding to an axial transition area between the water separation chamber and the water collection chamber.