Fuel Cell Gas-Liquid Separator Attitude Control for Drainage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In fuel cell systems, water in the gas-liquid separator does not always accumulate at a position suitable for draining, especially during vehicle acceleration and when temperatures drop below freezing, leading to potential drainage issues and freezing of discharge valves.
Innovation Solution
A fuel cell system with an attitude control device and instruction device that adjusts the position of the gas-liquid separator relative to the vehicle, ensuring water flows into the discharge valve efficiently and preventing freezing by controlling angles based on acceleration, temperature, and vehicle inclination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the gas-liquid separator is fixed in position, then the structure is simple, but water cannot be drained smoothly during vehicle acceleration
Solution Approach 1:
The gas-liquid separator is made rotatable about a vertical axis, allowing its opening to dynamically change orientation relative to the vehicle's acceleration direction. This dynamic positioning enables water to always flow toward the opening regardless of vehicle motion state, resolving the contradiction between simple fixed structure and effective drainage operation.
2Ease of operation
If the discharge valve is positioned at the bottom, then water can drain under gravity, but the valve freezes when temperature drops below freezing point
Solution Approach 1:
The system performs preliminary drainage operation before temperature drops to freezing point. The control unit detects temperature changes and activates the discharge valve to drain water from the separator before freezing conditions occur, preventing valve freezing while maintaining drainage capability.
Solution Approach 2:
The system uses temperature sensors to continuously monitor the environment and provides feedback to the control unit. Based on this feedback, the control unit determines when to activate the discharge valve for drainage, creating a closed-loop control system that prevents freezing while maintaining drainage functionality.
3Quantity of substance
If the opening is at the bottom of the separator, then water accumulation is maximized, but water moves away from the opening during acceleration
Solution Approach 1:
The gas-liquid separator can rotate about a vertical axis to dynamically adjust the opening's orientation. During vehicle acceleration, the separator rotates to position the opening in the direction of water accumulation, ensuring continuous drainage capability while maintaining the bottom-opening configuration for maximum water accumulation.
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
Enables smooth drainage of water from the gas-liquid separator and prevents freezing of discharge valves, ensuring continuous operation and efficient water management in fuel cell systems.
Implementation Method 1
a gas-liquid separator 36 configured to separate water from an off-gas discharged from the fuel cell 10 and store the separated water
Implementation Method 2
separate water from an off-gas discharged from the fuel cell
Implementation Method 3
When the amount of saturated vapor decreases along with a decrease in temperature while the fuel cell vehicle is parked, water vapor in the gas-liquid separator is condensed into water and accumulates at the bottom in a vertical direction
Data Source
AI summary
A fuel cell system to be mounted on a vehicle includes a fuel cell configured to generate electric power through chemical reaction of reactive gases, a gas-liquid separator configured to separate water from an off-gas discharged from the fuel cell and store the separated water, a discharge valve configured to drain the water flowing out through an opening at a bottom of the gas-liquid separator, an attitude control device configured to control an attitude of the gas-liquid separator relative to the vehicle, and an instruction device configured to send an instruction for a control target of the attitude of the gas-liquid separator to the attitude control device.