Ring-Form Composite Air Storage for CAES Space Efficiency

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Solution Overview

Problem

Traditional CAES systems face challenges with complex and costly grid parallel tube arrangements, space inefficiency, material corrosion, and geographical rigidity, particularly with steel tubes, limiting their adaptability and scalability.

Innovation Solution

A ring-form air storage design using advanced composite materials like glass and carbon fiber tubes, eliminating the need for end caps and concrete blocks, allowing for larger diameters and improved stress resistance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If steel tubes are used in traditional grid parallel form, then initial cost and mechanical strength are improved, but corrosion resistance and adaptability to temperature variations deteriorate

Engineering Contradiction:
Improvemechanical strengthVSAvoidcorrosion resistance
Core Design Contradiction:
StrengthVSReliability

Solution Approach 1:

The patent applies composite materials (fiberglass or carbon fiber reinforced polymers) to replace traditional steel tubes in CAES systems. These composite materials provide equivalent or superior mechanical strength while offering excellent corrosion resistance and thermal stability, directly resolving the contradiction between initial strength and long-term reliability against corrosion and temperature variations

Inventive Principle:
Principle #40Composite materials

2Strength

If grid parallel tube arrangement is used, then structural integrity under pressure is improved, but device complexity and construction cost increase

Engineering Contradiction:
Improvestructural integrityVSAvoidconstruction complexity
Core Design Contradiction:
StrengthVSDevice complexity

Solution Approach 1:

The patent transitions from straight grid parallel tubes to curved ring-form configurations. This curvature allows the structure to naturally distribute and withstand compressive forces more efficiently, eliminating the need for complex endcap assemblies and concrete blocks while maintaining structural integrity under high pressure

Inventive Principle:
Principle #14Spheroidality (Curvature)

3Stress or pressure

If traditional grid parallel form is used, then pressure withstanding capability is improved, but space efficiency and geographical adaptability deteriorate

Engineering Contradiction:
Improvepressure withstanding capabilityVSAvoidspace requirement
Core Design Contradiction:
Stress or pressureVSArea of stationary object

Solution Approach 1:

The ring-form configuration with its curved geometry achieves superior space efficiency compared to straight grid arrangements. The circular geometry naturally distributes stress evenly, allowing the system to withstand high pressures while occupying less surface area and adapting more flexibly to various geographical locations and site constraints

Inventive Principle:
Principle #14Spheroidality (Curvature)

Data Source

PatentEP4603741A1Artificial air storage for compressed air energy storage
Publication Date: 2025.08.20 SIEMENS ENERGY GLOBAL GMBH & CO KG
  • EP4603741A1 patent drawingFigure 1~2
  • EP4603741A1 patent drawingFigure 3
  • EP4603741A1 patent drawing

AI summary

The present invention relates to a CAES system with an air storage assembly formed by one or more pipes, each being a tubular element made from advanced composite material. These materials may include carbon fiber or glass fiber, offering superior strength, resistance to environmental stress, and greater storage capacity due to the possibility of larger diameters for the storage element. The air storage assembly can be advantageously designed as a closed loop, typically in a ring or donut shape, which simplifies the overall structure and reduces the complexity and costs associated with managing high pressure. The proposed advantageous design also allows for more flexible installation and efficient use of space, making the system adaptable to various environmental and geographical conditions.