Fuel Cell Liquid Separator With Backflow Barriers for Water Removal
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Solution Overview
Problem
Fuel cell systems face operational challenges due to water accumulation, particularly at low temperatures and during non-constant vehicle travel, leading to potential fuel cell stack malfunctions and reduced efficiency.
Innovation Solution
A liquid separator device is designed for fuel cell systems, featuring a catchment region on the channel wall, a liquid passage, and a liquid-collecting region, which effectively captures and directs water away from the fluid-conducting channel, utilizing helical liquid-conducting elements and backflow barriers to prevent re-ingestion, ensuring reliable operation under varying conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the fuel cell operates at low temperatures or during non-constant travel, then the fuel cell can handle varying operating conditions, but water accumulates in the pipe system leading to freezing issues and malfunctions
Solution Approach 1:
The invention extracts water from the fluid stream by introducing a liquid separator that captures liquid droplets from the gas phase. The separator removes water accumulations from the pipe system before they can cause freezing issues or malfunctions, allowing the fuel cell to operate reliably under varying conditions including low temperatures and non-constant travel.
Solution Approach 2:
The liquid separator performs preliminary water removal from the fluid stream before the water can accumulate to problematic levels. By continuously capturing liquid droplets in advance, the system prevents freezing issues and malfunctions before they occur, ensuring reliable operation during low temperatures and non-constant travel conditions.
2Productivity
If liquid is captured in a catchment region close to the fluid-conducting channel, then liquid separation is efficient, but the captured liquid may re-enter the channel during vehicle maneuvers
Solution Approach 1:
The invention introduces a liquid passage as an intermediary element between the catchment region and the fluid-conducting channel. This controlled passage allows liquid to be transferred from the catchment region while preventing direct contact and potential re-ingestion during vehicle maneuvers. The liquid passage acts as a mediator that maintains separation efficiency while ensuring reliability by controlling liquid discharge paths.
3Reliability
If a liquid passage is introduced to remove captured liquid, then water accumulation is reduced, but the device complexity increases
Solution Approach 1:
The liquid separator utilizes a diaphragm as a thin film structure that forms the catchment region and liquid passage integration. This thin film approach achieves effective water accumulation prevention while minimizing device complexity. The diaphragm creates the necessary separation and liquid transfer pathways without requiring complex mechanical structures, maintaining a compact and simple overall device design.
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 liquid separator ensures minimal water accumulation in the fuel cell system, preventing freezing issues and maintaining continuous operation during temperature fluctuations and vehicle maneuvers, thereby enhancing fuel cell reliability and efficiency.
Implementation Method 1
The density of the drops is greater than that of the surrounding gas so that the drops are driven outward from the flowing fluid and meet the catchment region
Implementation Method 2
a liquid passage (110) branching from the fluid-conducting channel (104), and a liquid-collecting region (112) into which the liquid passage (110) opens
Data Source
AI summary
The invention relates to a liquid separator (100), in particular for a fuel cell device, the liquid separator (100) comprising the following: a fluid-conducting channel (104), a collection region (106) for collecting liquid originating from a fluid that is conducted in the fluid-conducting channel (104), a liquid passage (110) branching off from the fluid-conducting channel (104) and a liquid collection region (112) into which the liquid passage (110) leads.