Fuel Cell Anode Gas Conditioning With a Top-Mounted Drain Valve
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing gas management systems for fuel cells face challenges in dewatering and gas removal when ice forms in the water separator, leading to valve closure and freezing, which complicates or prevents necessary purging, especially during operational standstill.
Innovation Solution
A gas management apparatus with a drainage valve positioned above the fluid tank, allowing for simultaneous discharge of gases and liquids through a single valve, and optional features like a bypass line and emergency valve for pressure equalization and emergency discharge, preventing ice formation and reducing installation space and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the drainage valve is arranged at the bottom of the fluid tank for water discharge, then water can be efficiently drained, but the valve freezes when ice forms in the collecting tank
Solution Approach 1:
The drainage valve is inverted from the conventional bottom position to the top position of the fluid tank. This inversion allows the valve to be located in the gas phase rather than the liquid phase, preventing ice formation at the valve while maintaining drainage functionality through the riser pipe connection to the bottom of the tank.
2Adaptability or versatility
If separate valves are provided for water discharge and gas purging, then each function can be optimized, but the device complexity and installation space increase
Solution Approach 1:
A single drainage valve at the top of the tank is designed to perform multiple functions: draining water through the riser pipe to the bottom of the tank, purging gas from the gas space, and controlling fluid levels. This multi-functional valve eliminates the need for separate discharge and purging valves, reducing system complexity while maintaining full operational versatility.
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
Ensures reliable operation by preventing valve freezing, simplifying process control, and achieving efficient gas and liquid discharge even with ice formation, while reducing installation complexity and weight.
Implementation Method 1
the drainage valve (8) is arranged in the upper area and/or above the top side (2.1) of the fluid tank (2)... the drainage valve (8) is arranged in the upper area and/or above the top side of the fluid tank, and furthermore gases and liquids, here in particular water, can be discharged via the same drainage valve during proper operation
Implementation Method 2
a riser (7) is provided, which is connected with its lower end to a lower area of the interior space, namely where the water separated from the exhaust gas first collects, and/or the riser projects into the interior space. The riser is connected with an upper end to a drainage valve (8)
Data Source
AI summary
A gas management apparatus and a method for conditioning anode gas of a fuel cell. The apparatus comprises a fluid tank and a water separator that is fluidically connected thereto, a drainage valve being arranged in the upper area and/or above the top side of the fluid tank. During proper operation, gases and liquids, in particular water, are drawn off via said one drainage valve.