Double-Walled Hydrogen Container Pressure Gradient
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Hydrogen and helium storage containers face significant challenges due to the small size of their molecules/atoms, leading to high permeability and escape of gases, especially at room temperature, and existing solutions like hydrogen barrier coatings or hydride-based methods are costly and complex.
Innovation Solution
A double-walled container system where a fluid, such as nitrogen or water, is maintained at a higher pressure in the inter-space between the inner and outer walls, effectively creating a high-pressure envelope around the hydrogen or helium, reducing diffusion and the need for costly liners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional hydrogen barrier coatings or liners are used to limit hydrogen escape, then gas containment is improved, but device complexity and cost increase
Solution Approach 1:
The container is divided into two separate walls (inner wall and outer wall) with an inter-space between them. The inner wall contains the hydrogen while the outer wall is exposed to the external environment. This segmentation allows each wall to be optimized for its specific function and simplifies the overall structure compared to complex multi-layer liners.
Solution Approach 2:
A buffer gas (such as nitrogen or helium) is introduced into the inter-space between the inner and outer walls. This intermediary gas creates a pressure differential that opposes the diffusion of hydrogen through the inner wall, reducing hydrogen loss without requiring complex barrier coatings on either wall.
2Loss of substance
If hydrogen barrier coatings are used to prevent gas escape, then permeability is reduced, but manufacturing cost increases
Solution Approach 1:
The invention uses a pneumatic approach by introducing a buffer gas into the inter-space at a controlled pressure. This gas pressure creates a counter-gradient that reduces hydrogen diffusion through the inner wall, replacing the need for expensive specialized barrier materials with a simpler pressure-controlled system.
Solution Approach 2:
The system changes the pressure parameter in the inter-space between the inner and outer walls. By maintaining a higher pressure of buffer gas in the inter-space compared to the hydrogen pressure inside the inner wall, the diffusion driving force is reduced, thereby decreasing hydrogen loss without requiring expensive materials.
3Loss of substance
If thick barrier liners are used to contain hydrogen, then diffusion is reduced, but weight increases
Solution Approach 1:
The barrier function is segmented between the inner wall, the inter-space buffer gas, and the outer wall. This distributes the containment function across multiple simpler components rather than requiring a single thick heavy liner, reducing overall container weight while maintaining effective hydrogen containment.
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 approach significantly reduces gas loss through the container walls, enhances storage reliability, lowers costs, and eliminates the need for exotic liners, while allowing for efficient containment of hydrogen and helium in both gaseous and liquid states.
Implementation Method 1
hydrogen is highly permeable and has the tendency of escaping from the containers or tanks they are stored in
Implementation Method 2
a fluid, other than small atomic structure gas, is maintained in the inter-space at a higher pressure than the pressure of hydrogen contained within the inner wall
Data Source
AI summary
In a hydrogen or helium container and method for containing the gas, a double-walled housing is provided, which defines an inter-space between the inner and the outer walls, the inter-space being filled with a fluid at a higher pressure than the pressure of the hydrogen or helium contained within the inner wall.