High-Pressure Tank Resin Layer Water Isolation
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Solution Overview
Problem
High-pressure tanks with fiber reinforced resin layers face deterioration due to water contact, leading to gas leakage and reduced durability, as the existing designs require the resin layer to have gas barrier properties, limiting material choices and increasing the risk of resin degradation.
Innovation Solution
A high-pressure tank design featuring a first reinforcing layer with a cylinder member and dome members, covered by a second reinforcing layer made of helically wound fiber bundles, and an intermediate resin layer with higher gas barrier properties than the first reinforcing layer, which reduces gas leakage and prevents direct water contact with the resin layer, allowing for the use of resins that are easily deteriorated by water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the resin layer is used to form the storage space and provide gas barrier properties, then gas leakage is reduced, but the resin layer directly contacts water causing deterioration
Solution Approach 1:
The patent divides the gas barrier function from the water contact function by creating separate layers: the resin layer provides gas barrier properties while the liner layer provides water contact resistance. This segmentation allows each layer to be optimized for its specific function without compromise.
Solution Approach 2:
The liner layer acts as an intermediary between the resin layer and water, protecting the resin layer from direct water contact while allowing the resin layer to maintain its gas barrier function. This mediator layer resolves the conflict between gas barrier requirements and water resistance requirements.
2Reliability
If the liner is formed on the body portion to reduce gas passage, then gas barrier properties are improved, but the liner material choices are limited due to water deterioration risk
Solution Approach 1:
The patent segments the functional requirements into two separate layers: the resin layer for gas barrier properties and the liner layer for water contact resistance. This allows independent material selection for each layer, expanding overall material versatility while maintaining both gas barrier and water resistance performance.
Solution Approach 2:
The patent employs a composite structure combining a resin layer and a liner layer made of different materials. This composite approach allows selection of optimal materials for each specific function (gas barrier and water contact), providing greater overall material flexibility than a single-material solution.
3Reliability
If water remains in the storage space after testing or during use, then the resin layer is exposed to water causing deterioration, but removing water completely is difficult
Solution Approach 1:
The patent applies preliminary protection by forming the liner layer over the resin layer before water contact can occur. This preemptive measure protects the resin layer from water deterioration without requiring complete water removal from the storage space, addressing the manufacturing difficulty while ensuring durability.
Data Source
AI summary
A high-pressure tank includes a first reinforcing layer and a second reinforcing layer. The first reinforcing layer is a layer obtained by joining dome members to respective end portions of a cylinder member, the dome members being a pair, and an inner peripheral surface of the cylinder member is exposed to a storage space that stores gas. A first resin layer covers the cylinder member between the first reinforcing layer and the second reinforcing layer. The first resin layer is less permeable to the gas in a thickness direction than the first reinforcing layer.