Large-Deformation Underground Energy Storage With Auxetic Sealing
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Solution Overview
Problem
Existing underground energy storage systems face seal failure and environmental risks due to gas deformation and pressure increase, affecting energy conversion efficiency and safety.
Innovation Solution
A large deformation underground energy storage device comprising a rubber sealing layer, negative Poisson's ratio material layer, and large deformation concrete layer, along with rock layers, designed to withstand and mitigate pressure changes, incorporating a one-way pressure pump and water depth gauge for autonomous water management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If gas is compressed and stored in an underground gas storage, then energy storage capacity is improved, but the gas storage deforms and seal failure may occur
Solution Approach 1:
The patent employs a rubber sealing layer as a flexible membrane structure to contain the compressed gas. This flexible shell can deform elastically under pressure, accommodating the volume changes during compression and expansion cycles without compromising seal integrity, thereby resolving the contradiction between energy storage capacity and seal reliability
Solution Approach 2:
The patent uses a composite structure consisting of multiple layers including rubber sealing layer, negative Poisson's ratio material layer, and large deformation concrete layer. This composite material system combines the advantages of different materials to achieve both high energy storage capacity and maintained seal reliability under pressure
2Quantity of substance
If increasing pressure is applied during gas compression, then energy density is improved, but deformation increases and may cause seal failure
Solution Approach 1:
The rubber sealing layer acts as a flexible container that can undergo large deformations under high pressure without failing. This allows the system to achieve high energy density through pressure increase while the flexible shell accommodates the shape changes, preventing seal failure
Solution Approach 2:
The patent utilizes materials with negative Poisson's ratio that exhibit unusual deformation characteristics. When these materials are compressed, they expand in lateral directions rather than contracting, which helps distribute stress and reduce overall deformation, enabling higher pressure storage with controlled shape change
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
The device enhances gas storage capacity and safety by reducing internal pressure, preventing gas leakage, and maintaining efficient energy storage through large deformation and autonomous water sealing.
Implementation Method 1
the negative Poisson's ratio material layer includes multiple negative Poisson's ratio material elements connected in sequence
Implementation Method 2
a rubber sealing layer, and the body includes a rubber sealing layer
Implementation Method 3
a one-way pressure pump is arranged in a middle part of the conduit. The conduit penetrates into an interior of the body for discharging accumulated water in the body
Data Source
AI summary
The disclosure belongs to the field of underground energy storage, and particularly provides a large-deformation underground energy storage device, including a body. The body includes a rubber sealing layer, a negative Poisson's ratio material layer, a large deformation concrete layer and rock layers sequentially nested from inside to outside; an internal storage space is formed in the rubber sealing layer, the negative Poisson's ratio material layer includes a plurality of negative Poisson's ratio material elements connected in sequence, and the large deformation concrete layer is cast from deformable concrete.